Table of contents

This proceeding includes original and peer-reviewed research papers from 2^nd International Conference on Air Pollution and Environmental Engineering (APEE 2019). APEE 2019 was held in Xi'an, China during December 15-16, 2019.

Air pollution has become a major issue in China and other developing countries, it could become the biggest health threat. APEE 2019 is a platform for presenting excellent results and new challenges facing the field of the air pollution and environmental engineering. It brings together experts from industry, governments and academia, experienced in engineering, technology and research. To promote environmental protection and green sustainable development all over the world.

APEE 2019 received 471 manuscripts, and 126 submissions had been accepted by our reviewers. By submitting a paper to APEE 2019, the authors agreed to the review process and understood that papers undergo a peer-review process. Manuscripts were reviewed by appropriately qualified experts in the field selected by the conference committees, who gave detailed comments and-if the submission was accepted the authors would submit a revised version that took into account this feedback. All papers were reviewed using a double-blind review process: authors declared their names and affiliations in the manuscript for the reviewers to see, but reviewers did not know each other's identities, nor did the authors receive information about who had reviewed their manuscript. The Committees of APEE 2019 invested great efforts in reviewing the papers submitted to the conference and organizing the sessions to enable the participants to gain maximum benefit.

Hopefully, all participants and other interested readers will benefit scientifically from the proceedings and also find it stimulating in the process.

List of Conference Chairs, Technical Committees and Organizing Committees are available in this pdf.

All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

With economic development, people often ignore the changes to the ecological system of the constructed area. However, whenever we change an ecosystem, it is possible to limit or remove ecosystem services. Therefore, we measure the degradation of ecosystem service values before and after a development project by establishing ecological health evaluation and social-ecological economic compound model. Through the establishment and calculation of these models, we find that in order to achieve scientific and sustainable development in a certain region, the restoration value of the ecosystem must be taken into consideration, and the optimal solution of social, ecological and economic composition can be found based on the actual geographical situation. The method in this paper is more concise and intuitive, which has a strong economic measurement effect on the policy of minimum ecological damage in current engineering construction, and the optimal solution can be find according to engineering requirements to ensure the balance between environment and construction.

Objective: The objective is to investigate the impact of groundwater resource pollution of coal-fired power plants and its impact on the properties of geotechnical engineering based on numerical simulation technology, thereby proving the effectiveness and superiority of numerical simulation technology in preventing groundwater resource pollution and forecasting the related information, which would provide direction and guidance for the treatment and management of groundwater resource pollution. Method: First, the regions to be investigated are divided and generalized. Then, relevant experiments are carried out for the calculations of hydrogeological parameters to establish the hydrogeological conceptual model. Next, the real-time water level data recorded by the observations are used to identify and verify the model effectively. Afterward, the numerical simulation of groundwater solute transportation is carried out again. During the process, the establishment of the groundwater quality model is the focus, followed by the application of numerical simulation technology to forecast the environmental impacts of groundwater pollution, including the forecasting of groundwater environmental pollutions caused by Chemical Oxygen Demand (COD) leakage, ash yard, and power plants. Results: Through the application of numerical simulation technology, the current information about groundwater pollution, such as the scope of impact and the movement law of pollution, can be understood clearly and timely. Conclusion: By applying the numerical simulation technology in forecasting groundwater pollution, the groundwater pollution problems can be prevented effectively, which offers great help to the correct and reasonable operation and development of coal-fired power plants, which provides a significant reference for the preventive treatment of groundwater pollution.

The sintering flue gas in steel production has the characteristics of large discharge capacity, fine size, high temperature, corrosion and fluctuation of working conditions, and is the primary control object of PM_2.5 emission source. Traditional dust removal technologies and equipment are difficult to achieve efficient collection of fine particles. In order to quantitatively study the effect and regularity of high intensity sound waves on fine particles, the online acoustic agglomeration test system was built by using high-power pneumatic source and wave tube with abrupt section. The high intensity standing wave field of 140 to 150 dB was generated in the wide frequency range between 50 Hz and 2 kHz by the acoustic resonance synthesis, and interference from compressed airflow was avoided by the acoustic-flow separation module. Variation of the sintered flue gas PSD was obtained under different sound intensities and frequencies. Data analysis shows that the high concentration condition can greatly reduce the operation time and energy consumption. Under the action of high intensity acoustic waves with a fundamental sound pressure level of 87.3-161.8dB and duration of 3s, the measured PM_2.5 removal efficiency is 16%-92%, and the optimal frequency is near 800Hz. This paper verifies the feasibility of acoustic agglomeration (AA) in the treatment of sintering flue gas, and provides a theoretical reference and technical basis for the development of PM_2.5 real-time emission control device for steel production.

Vegetation is an important part of island ecosystem. Due to the distinction of vegetation from mainland vegetation, the existing mainland sampling method cannot be entirely applied to the islands. Hence it is necessary to combine the existing mainland vegetation sampling methods, and to select different types of islands to test the key links of the methods, and to accumulate data for statistical analysis, so as to obtain the technical methods suitable for island vegetation sampling. Aiming at the application of quadrat method in island vegetation survey, this paper chooses two different survey areas of North Changshan Island as examples, compares different quadrat setting methods, clarifies how to set the quadrat in different kind of slope direction, slope position, and types of plant communities, how much the number of quadrat, and how much the area of quadrat can be set in order to represent the island more completely. Finally, the optimal principle of setting up the island quadrat is determined, which provides scientific basis for the effective selection of the quadrat setting in the investigation of island vegetation community.

This article focused on the National Monitoring and control stations and selfbuilt two dust four gas, and the data were analysed, taking into account the humidity, temperature, wind speed, pressure, precipitation of the five meteorological factors, the difference between the two data analysis, and made the establishment of a mathematical model, the self-built Point data was calibrated.

There's a growing concern about the phenomenon of high temperature chlorination corrosion on the waste incineration boilers by researchers. This paper discusses the corrosion features of chlorination corrosion for metallic materials at high temperature, explore the mechanism of high temperature chlorination corrosion, analyze the main factors of effect chlorination corrosion, and preventive measures for the resistance to high temperature chlorination corrosion were proposed.

In this paper, experimental study had done in view of the wastewater which discharged from chlorine alkali factory propylene oxide production workshop in Zibo city of Shandong Province. The Pre-oxidation + Biological Contact Oxidation craft has proposed for the epoxy propane production wastewater treatment. In view of the characteristics of this kind of wastewater, the main research contents are three aspects: the discussion of gradually microorganism salinity endurance enhancement, the best test condition of H₂O₂ oxidation for per-oxidation, and the effect verification test of the Pre-oxidation + Biological Contact Oxidation craft.

PCR-based denaturing gradient gel electronic (PCR-DGGE) has become a frequently used method in the determination of bacteria community in water, soil and other habitats. However, the precision and the integrality of microbiology community by this approach should be reinforced and the key for this is optimization on PCR for which is the basis of PCR-DGGE. Aiming at this, PCR enhancer combinations were applied in both two amplification rounds of PCR-DGGE in this study. The results showed that many new bands were produced and originally weak bands were intensified after the addition of PCR enhancer combinations, particularly DBD-2 (1% DMSO, 0.4 M Betaine, 1mM DTT) in PCR amplification buffer system. Virtually all newly appeared bands in DGGE were probably derived from the bacteria with high GC% content (60%). Thus the major optimization on PCR-DGGE was PCR enhancer may contribute to decreasing annealing temperature and improving the PCR product yields of the high-GC%-contented bacteria. In conclusion, PCR enhancers could remarkably improve the amplification efficacy, particularly for using the complex and tiny environmental DNA or weaker bands from DGGE as PCR template, and furthermore increase the detected bacterial species in PCR-DGGE. Therefore we strongly proposed that the PCR enhancer combination be routinely applied in PCR-DGGE for the bacterial community determination.

Based on the localized improved GLOBEIS model, the total amount of biogenic isoprene emissions in Tianjin in 2018 was estimated and the temporal and spatial distribution characteristics were analysed by using the land-use type data interpreted from remote sensing images and the observed hourly meteorological data. The results show that the total amount of biogenic isoprene emission in Tianjin reached 694 t (calculated by C, the same below) in 2018, and the emission intensity was 0.06 t/km²/a. The diurnal, monthly and seasonal variations of biogenic isoprene emissions are obvious: High at noon and low at night; Highest in August and lowest in January; Emissions in summer are the largest while the smallest in winter. The spatial characteristics are closely related to land-use types, and the emissions of biogenic isoprene are mainly concentrated in the forest areas, and the emissions are small in the Urban districts of the city and Binhai New District. Finally, the uncertainty sources of biogenic isoprene emission estimation were analysed.

The experimental study on the optimization of ammonia injection in the denitration system of a 300MW coal-fired unit in a power plant. Under the premise of meeting the ultra-low emission standards of environmental protection requirements, the ammonia injection amount of the denitration device can be reasonably adjusted by adjusting the opening degree of the manual ammonia valve. It significantly improves the uniformity of the NOx concentration distribution in the denitration system. It eliminates local ammonia slip peaks and reduces ammonia slip rate. The deviation of the NOx concentration distribution at the outlet of the denitration system decreased by 70.1% and 46.7%, respectively. The ammonia slip concentration decreased by an average of 0.80 mg/m3 and 1.05 mg/m3. Ammonia consumption decreased by 8 kg/h and 15 kg/h, respectively.

The study employed both quantitative and experimental approaches, CO and CO₂ was sensed and recorded with the aid of Carbon Monoxide Analyzer and Handheld GPS. Four hundred (400) structured questionnaires was administered and Volumetric traffic count was conducted along seven (7) major junctions across the study area. E. View 8 was adopted for the analysis. Carbon Sensing results depict that Fagge local government area recorded the highest out door CO of 012Ppm. On the other hand, Gwale local government is the top indoor carbon emitters with10Ppm. The field survey indicates that types of land uses, densities and nature of socio-economic activities significantly affect both CO and CO₂ in the metropolis. It indicates that Tarauni local Dangi Junction's average daily carbon sensed records is the highest with exactly 19.5 Ppm. Fagge, Dala and Gwale local governments areas precisely record the same of 14 Ppm. The quantitative air quality indicators demonstrate that, the coefficient of determination (R²) reveals that relatively 84% of the changes in the dependent variable (DV) environmental impact was fully captured in the study and therefore changes within the explanatory variables have significant environmental impacts. Traffic count result shows that, Nasarawa local governemnt maintains the most traffic flow with 18957 vehicles records within the study days and the study indicates that interaction of traffic flow in the metropolis significantly increases the air pollution. Recommendation is drawn from the identified issues.

To investigate the effect of meteorological factors, seasonal factors and Air Pollutions on the formation of particulate matter (PM2.5) in Jinan, China. Nonlinear dynamic inversion model was established to analyze the effect of meteorological factors, seasonal factors and CO, PM10, SO₂, NO₂, O₃ on PM2.5 formations in different seasons. Temperature has a great influence on PM2.5 concentration variation. Precipitation exacerbate the formation of PM2.5 in Winter. Wind speed make a little contribution to PM2.5 formation in Jinan during different season. The formation of PM2.5 was influenced by confounding factors.

Environmental pollution problems are becoming more and more serious, air pollution and air quality problems, has become a hot spot of special concern. PM2.5 is an important indicator of air quality testing .This design uses GP2Y1010AUOF dust sensor,SHT20 temperature and humidity sensor and so on, transmit the signal to ATMEGA328PAUM SCM. The system detects the detection through the analog to digital conversion and median value average filtering algorithm. The PM2.5 Concentration values are displayed to OLED screen, alert if the detection value exceeds the standard. Experiments show that the system is running well, with a measurement accuracy of 4.8%, and has a certain stability and practicality.

According to the IPCC carbon emission calculation method, Tianjin's carbon emissions were calculated from 2000 to 2017, and the main factors affecting carbon emissions were analyzed and studied using the LMDI model system. The results show that Tianjin's energy consumption carbon emissions continued to increase from 2000 to 2017, and have declined significantly in recent years. Among the carbon emissions of energy consumption, coal produced the most carbon emissions, followed by crude oil and coke; Among the factors that affect Tianjin's carbon emissions from 1997 to 2017, economic development has the largest positive effect, and energy consumption intensity has the largest negative effect; Tianjin's energy consumption is unreasonable, and it mainly depends on coal, crude oil and other energy sources.

The mechanisms of chlorpyrifos removal from constructed wetland systems were determined using different initial concentrations of chlorpyrifos. The microbial community structure in the wetland system was analyzed using high-throughput sequencing technology. The results showed that, in the wetland system, the removal of chlorpyrifos was accomplished by combined substrate adsorption, plant absorption, and microbial degradation. However, there were significant differences in the removal of chlorpyrifos by substrate, plants, and microbes when different initial concentrations of chlorpyrifos were used, and with different wetland systems. High-throughput sequencing results showed that there was a negative correlation between the microbial community richness in late operation of wetland systems and the initial concentration of chlorpyrifos. In the wetland systems, Proteobacteria and Acidobacteria were the predominant bacterial phyla that conducted the removal of chlorpyrifos.

In this paper, the treatment characteristics of immobilized microbial technology on swine wastewater under different operating conditions were investigated, so as to optimize the operating conditions of the system. At the same time, the microorganism community structure in the optimal condition was analyzed by high throughput sequencing technology. As a results, the optimal conditions for the degradation of TN in swine wastewater by immobilized microorganism were the filling rate of 25%, HRT of 27.5h and C/N of 5.48. In this case, the actual value of the TN removal rate was 74.81%. With the operation of the system, the abundance and diversity of the microbial community in the system are decreased, while the diversity and abundance of the microbial community in the denitrification tank are generally higher than that in the nitrification tank. Proteobacteria and Bacteroidetes are the dominant bacterial phylum, Hydrogenophaga are the dominant bacterial genus. The function of microbial community in the system is mainly "Metabolism".

Water is one of the most important resources in production and life, and water pollution will break the ecological balance within water and thus threaten human life and production, and even human health. At present, water treatment methods and technology are attracting attention around the world. Shanghai is the earliest Chinese city to set up modern drainage facilities, which has accumulated rich and valuable experience in water treatment. Therefore, this study takes Shanghai as the research area, summarizes sewage treatment technologies used here, and analyzes the advantages and drawbacks of these technologies. It is hoped that this research can provide a theoretical basis for the sustainable development of China's sewage treatment technology.

The extractable lipids are important components in soil organic matter (SOM) which were used to trace the sources and degradation of SOM. The protection of lipids by soil mineral have been suggested through organic solvents. But, the extraction efficiency of some lipid compounds was low. This study applied a mild acid treatment to firstly remove most of the reactive mineral particles, and without altering SOM chemical structures in 10% HF/1M HCl (1:4 w: v). Based on the obtained lipid biomarker information, we observed that the lipid extraction efficiency significantly increased by organic solvents on after removal of active minerals. The acid treatment increased the scientific to quantitative the amount of lipids. The minerals showed significant differences in the selective protection to different components of lipids. In this study, the amount range of protected n-alkanoic acids is 73~85%, n-alkanol 41~62% and n-alkanes 26~46%. After the vegetation was replaced, the increased alkenoate and alkane in soil input by the plant tissues of plantain directly, and the alkanols probably input by the hydrolysis of wax esters. Under the interference of man-made tillage activities, the C content in 0-20 cm decreased, suggesting that cultivated activities may enhance SOM degradation and accelerate SOM turnover. Understanding SOM behaviour in this area will provide important information for soil management and to evaluate carbon cycling in human-affected ecological systems.

Nanoparticle cerium oxide (n-CeO₂) has been widely used, recently, its toxicity to the aquatic environment has received increasing attention. This study aimed to explore the effects of n-CeO₂ on the physiology of Chlorella pyrenoidosa. Results showed that n-CeO₂ may inhibited the growth of Chlorella pyrenoidosa, and make some influence of chla and protein contents because of the ROS. The activity of SOD and MDA contents also indicated that the high concentration of n-CeO₂ may beyond the range of tolerance, which means ROS content may be a key factor in the toxic effects of n-CeO₂ on Chlorella pyrenoidosa.

With more and more international economic exchanges, ship transport becomes more and more frequent, which further increases the exchange capacity of ship ballast water in different sea areas, thus causing more and more serious marine problems of alien microbial invasion. Therefore, in this paper, on the basis of microbial inactivation of ship ballast water treated by uv irradiation, the influencing factors of its catalytic activity were explored by adding photocatalyst TiO₂ into the bacterial suspension, That is to change the catalytic activity of titanium dioxide noble metal and other modified substances and doping amount. Firstly, the UV-sterilization was used as a control, and the modified photocatalyst nano-TiO₂ was added. It was found that the sterilization rate increased greatly, indicating that the photocatalyst-modified nano-TiO₂ has a very strong reinforcing effect on ultraviolet sterilization. Secondly, the photocatalyst itself was changed. It was found that the amount of photocatalyst nano-TiO₂ had a great influence on UV sterilization. Within a certain range, the more the photocatalyst nano-TiO₂ is, the better the sterilization effect is. Finally, changing the external conditions of the photocatalyst, it was found that the photocatalyst nano-TiO₂ had the best activity at higher temperature (33 °C), alkaline (pH=8.5) or neutral (pH=7.5) and long-wave ultraviolet radiation.

This paper studies and constructs an intelligent system of urban domestic sewage treatment, which consists of five modules, namely, 3d visualization simulation module based on data twin, key system operation and maintenance management platform, mobile data management platform; energy management module, security and warning module. The digitalization, networking and intelligence of municipal wastewater treatment have been realized, which improved the management level of urban domestic sewage treatment enterprises and reduced operating costs.

Science and technology have developed rapidly recently, more and more automation technologies are applied to the production and life links, which provides a lot of help for social development and economic progress. In the power system, the power of the substation can be reasonably dispatched through the automatic control technology to reduce manual intervention and improve work efficiency. The use of power transfer automation technology can not only be more orderly and convenient to dispatch and manage, but also significantly improve the efficiency of power dispatching. It is an important technology for the development of the current power industry. This paper expounds the characteristics of power transmission automation technology, analyzes the innovative application of power transmission automation, and puts forward the trend of power dispatch automation, in order to better promote the development of China's electric power industry.

In order to solve the maintenance and management problems of the fire water tank in the fire water supply system, the problem of how to prevent the secondary pollution of domestic water by using the water source for fire storage water and domestic water is discussed. The countermeasures and the concept of intrinsic safety using shared fire-fighting water tanks are proposed, and it is clear that fire-fighting pools (boxes) need to strengthen water quality and the intrinsic safety of the pools. The innovative construction of the fire water tank system architecture is conducive to improving the reliability of fire water supply for buildings.

Volatile organic compounds (VOCs) are one of the important pollutants, which are easy to cause serious harm to the environment and human body. In this paper, solid adsorbents based on carbon-based adsorbents and porous molecular sieves, organic adsorbents and chemical materials based on chemical catalysts and photocatalysts are introduced. The effects of pore structure, specific surface area and acid base functional groups on the saturated adsorption capacity of carbon based adsorbents and porous molecular sieves were discussed. The differences between volatile organic solvents and new microemulsion systems and ionic liquids in terms of volatility, solubility and selectivity were compared. The latest progress of conventional thermal catalysts (noble metals, transition metals) and Photocatalysts (Metal/Nonmetal Doping, Nanomaterial Composite, Dye Sensitization) in VOCs treatment was discussed. The application prospects of new materials around biosurfactants and ionic liquids in the treatment of volatile organic compounds were pointed out.

This study evaluated the anaerobic digestion of MgO metal-oxide nanoparticles combined with microwave pretreatment to increase biogas production from microalgae. The result shows the maximum total biogas yield of 342ml and 320ml were achieved by the MW pretreatment of 800W, 4min +15mg/L MgO NPs group and 600W, 6min +5mg/L MgO NPs group, which are 1.38 and 1.30 times compared to control, respectively. The influence of metallic oxide (MgO) NPs and MW pretreatment on anaerobic digestion of Enteromorpha resulted in significant increase in cumulative biogas production. The modified Gompertz equation and Logistic function model were used to simulate the nanoparticle-enhanced anaerobic digestion process, which demonstrate that the modified Gompertz equation can better simulate the fermentation process of microalgae.

The marine environments are threatened by discharged wastewater from ships, especially ballast water. In this study, a novel ballast water treatment device (UVOM) was designed and operated for ballast water treatment. The main process of UVOM consists of membrane filter, venture tubes, the UV catalytic TiO₂ unit and an ozone generator. Salinity, flow rate and UV intensity was investigated for their efforts on process efficiency. Results indicated that salinity cause less effects on the removal efficiency of UVOM, and flow rate and UV intensity played more important roles. For UV intensity of 50 W and the flow rate no more than 200 L/h, and UV intensity of 75 W and the flow rate no more than 400 L/h, the discharged ballast water can meet the D-2 standard. Back propagation neural network (BPNN) was constructed for simulating the process performance, and it can better describe the process with less deviation between predictive values and real values. The deviation of the total bacteria was from 4.14% to 6.16%, and the deviation of E. coli was from 3.6% to 7.2%. In addition, the results showed that the relative importance of flow rate (65.96%) was significantly larger than UV intensity (34.04%).

The implementation of the latest International Maritime Organization (IMO) emission standards places stringent requirements on ship domestic wastewater discharges. In this study, an aerobic-anaerobic membrane bioreactor (O/A-MBR) was used to investigate the effect of influent COD and TN on ship sewage treatment. The results show that the lower volume load will affect the growth of the organism, and then affect the removal efficiency of COD. The increase of volume load is beneficial to the removal of COD, but the relatively high load will affect the removal of TN. Throughout the process, the O/A-MBR reached high COD and TN removal efficiencies with average values of 87.46% and 85.83%, respectively, and the best volume load range is obtained based on this experiment. It indicates that the novel MBR leads to good pollutants degradation effort and has great potential in practical ship domestic sewage treatment.

As the main energy in industrial production, coal resources are widely used in the world. However, in the process of coal combustion will produce a certain amount of pollutants, thus causing adverse effects on the air. The analysis of flue gas treatment of coal-fired boiler aims at improving coal utilization rate, reducing flue gas emission and advocating low-carbon concept. This paper deeply analyzes the flue gas problem of coal-fired boiler, explores the effective environmental treatment technology, and makes contribution to the environmental treatment problem.

According to the present situation of building water supply and drainage, water saving technology of building water supply and drainage is analyzed, and the effective utilization of water resources is realized. Water saving technology mainly includes the reasonable limit water pressure point, to avoid pressure flow; improve water supply system and reduce the invalid water; using water-saving water distribution equipment, sanitary ware; promote the use of high quality pipeline and valve; improve the status of the fire pool construction and development and promote the regeneration of water and rainwater utilization technology.

In this study, the contour of the soil arch is not assumed as a certain curve, and the soil stress analysis is conducted on a differential element with two dimensions. Herein, analytical expressions of the active earth pressure, active earth force are derived based on the static equilibrium of the differential element. Furthermore, the effects of wall-soil friction angle and soil internal friction angle on the active earth pressure are investigated. Eventually, comparisons among the proposed method of this study and the previous measured data and other analytical approaches yield satisfactory results.

With the rapid development of urban scale and the rapid expansion of urban population, the urban heat island effect caused by the rapid increase of urban anthropogenic heat emissions has gradually become an important factor that seriously affects urban living environment and residents' health. This study uses the Landsat TM5 and Landsat 8OLI_TIRS remote sensing data from 2000, 2006, 2013 and 2018 to calculate the surface temperature of the main urban area of Jinan, and the spatial distribution characteristics and thermal environment of the heat island in the main urban area of Jinan. Quantitative research on the relationship with natural vegetation, provide some data support for alleviating the urban heat island phenomenon in Jinan, promote ecological environment construction, and make scientific and rational planning for the future urban development of Jinan City.

In order to analyze the characteristics of air pollutant emission in ships in the Yangtze River Delta, this paperestablishes the air pollutant discharge list of ships in the Yangtze River Delta in 2017 based on the dynamic method of AIS data, and analyzes the emission characteristics of air pollutants in ships under different working conditions. The effect of its emission reduction measures and the spatial distribution of annual emissions of air pollutants from ships in the study area. The results showed: Among the atmospheric pollutants emitted by ships in the Yangtze River Delta in 2017, the emissions of SO₂, NO_x, PM₁₀, HC and CO were 339,900 tons, 527,700 tons, 45,400 tons, 14,500 tons and 34,300 tons respectively. Low-speed navigation has the largest proportion of emissions. The use of shore power for ship berthing is an effective measure to reduce emissions from coastal areas in the region.

In order to study and analyze the surface temperature uniformity of micro heat pipe array radiator, through comparative experiments, we found that: When the water supply flow is 1600 L/h, and the water supply temperature is 65 °C to 85 °C, the temperature difference between the head end and the end of the array radiator filled with R141b in the horizontal direction is only 1.9 ~ 2.1°C,the temperature drop ratio in the vertical direction is only reduced from 1.3% to 0.9%; The temperature drop ratio of the first end and the end of acetone filling is 4.2% to 2.5%,the temperature drop ratio in the vertical direction is 3.2% to 1%; The temperature drop ratio of the head end and the end of the copper aluminum composite radiator is 36.5% to 20.9%,the temperature drop ratio in the vertical direction is 9.5% to 1.2%. When the water supply temperature is 75 °C, the water supply flow is 1050L/h to 2200L/h, the maximum temperature drop ratio of the head end and the end of the micro heat pipe array radiator is only reduced from 3.4% to 2.6%,the temperature drop ratio in the vertical direction is only reduced from 0.8% to 0.6%; The temperature drop ratio of the head end and the end of the copper aluminum composite radiator decreased from 35.1% to 19.4%, the temperature drop ratio in the vertical direction decreased from 5.7% to 1.5%. Therefore, the temperature uniformity of the micro heat pipe array radiator in the horizontal and vertical directions is better than the existing copper aluminum composite radiator.

In July and October of 2018, a survey of plankton resources was conducted in Baiyangdian Lake. There were 8 species of cladocerans and 5 species of copepods were identified. The water quality and aquatic resources of Baiyangdian Lake were preliminarily grasped, and some advice was given on how to protect aquatic living resources and water ecological environment in Baiyangdian Lake.

The assessment methods are important contents in environmental quality assessment; each assessment method is based on one mathematical model. Through the analysis of various mathematical models, it is found that the selection of assessment methods in environmental assessment has very important guiding significance. By introducing four types of common mathematical models in current environmental assessment, this paper discusses the principles, features and applicable scope of various models, and briefly describes the application conditions of assessment methods in various models in environmental assessment.

Chitosan hydrogel, as a new type of macromolecule adsorbent material, has dual advantages of gel and various functional groups. It is easy to introduce functional groups which can chelate with heavy metal ions or electrostatic adsorption. It has large specific surface area and fast adsorption rate for heavy metal ions. It has quickly become a research hotspot in separation field. Based on this, the hydrogels of different components were prepared by integrating different proportions of copolymer monomers into chitosan hydrogels. The hydrogels of the same components were separately taken from aqueous solutions with different concentrations of Cu²⁺ for adsorption experiments. The heavy metal Cu²⁺ could be adsorbed and captured by a large number of functional groups such as sulfonic group, hydroxyl group, carboxyl group and amino group in the chemical structure. The effect of the same component on the hydrogel properties was also investigated. The molecular structure and internal morphology of the hydrogel and the effect of the amount of sodium styrene sulfonate (SSS) on the adsorption capacity of Cu²⁺ and the amount of glutaraldehyde on the water swelling rate were also investigated. The results show that the chitosan-P (SSS-HEMA-AA) hydrogel has a three-dimensional cross-linked network structure and has a high adsorption and removal efficiency for Cu²⁺. Its adsorption capacity for Cu²⁺ increases with the increase of the amount of sodium styrene sulfonate (SSS) in the preparation process, and the water absorption and swelling rate decreases with the increase of the amount of glutaraldehyde.

The aim of this study is to prepare non-sintered bricks using the chemical sludge as raw materials, so as to realize the recycling disposal of the sludge. Through the orthogonal experiment of five factors and four levels, the influence of five different factors and their levels on the compressive strength of non-sintered sludge test blocks was investigated. The results showed that the optimal combination of orthogonal experiment is A₄B₁C₄D₂E₃, the compressive strength reaches the maximum value of 24.29MPa; Through the analysis of the range, it was found that factor C had the greatest effect on the compressive strength, followed by the cement (P.O 32.5), hydrophobic agents and re-dispersible emulsion powder, the crack resistant fibre had the least effect. Considering the cost and R analysis, the combination of factors was adjusted as A₃B₁C₄D₂E₁, and three verification experiments were conducted, the average compressive strength was 23.57MPa.

Partial nitritation (PN) and anaerobic ammonium oxidation (ANAMMOX) were applied in biofilter reactors to treat low ammonium strength wastewater. The removal efficiency and contribution of PN-ANAMMOX process to COD_cr, BOD₅, NH₃-N, TN and TP were investigated. The results showed that the average removal rates of COD_cr, BOD₅, NH₃-N, TN and TP via PN-ANAMMOX process were 91.9%, 96.7%, 98.9%, 92.8% and 93.3% respectively when hydraulic load was 1.0 m/d. The effluent COD_cr, BOD₅, NH₃-N, TN and TP concentrations were lower than 13.8, 4.8, 0.76, 4.4 and 0.28 mg/L, respectively. The PN-ANAMMOX process showed high efficiency and stability in removing C, N and P pollutants from wastewater. PN reactor played a major role in the removal of COD_cr, BOD₅, NH₃-N and TP. ANAMMOX reactor played a leading role in TN removal.

A kind of nanoemulsion nickel catalyst was prepared for the application of coliquefaction of lignite and heavy residue. The particle size and microstructures of dispersed phases in emulsion and the sulfurized product were characterized by dynamic light scattering and transmission electron microscope. Catalytic performances of prepared catalysts at different dosage were investigated and the microscopic features of solid residues with catalyst or not were compared. Experimental results showed the optimization mixing speed for emulsion nickel catalyst preparation was 2000 r/min, with an average diameter of 180 nm, and the active phases of prepared catalyst after sulfurization was Ni3S2. The emulsion nickel catalyst displayed a favorable catalytic activity, with a coal conversion efficiency of 93.7 % and an oil yield of 72.33 wt%. The fragmented shapes and lowed diameters of solid residue with prepared catalyst relative to no catalyst further displayed its significant roles in the inhibition of condensation reaction and coke formation.

A series of different catalysts were prepared by impregnation method using P25 (nano-titanium dioxide), Mt (montmorillonite) and ZSM-5 as supports, and Mn, Cu, Ce, Co and Fe as active components. The effects of catalytic oxidation were investigated to investigate the factors affecting the catalytic oxidation of toluene. The catalysts were characterized by BET, XRD and SEM. The surface morphology and pore size and pore volume were observed. It was found that MnCu0.5Ce2On/P25 had the best removal effect on toluene under the condition of 3% O₂ and temperature of 240 °C. Combined with the characterization results, the pore size and pore volume are relatively large, which is beneficial to increase the selective adsorption of toluene and increase the dispersion of active components, so that the metal oxide of the active component is uniformly dispersed on the surface of the catalyst, and the catalyst is increased. The surface active site enhances the performance of catalytic oxidation of toluene.

A series of HMS molecular sieves with different pore structures were prepared by using dodecylamine and octadecylamine as template and tetrabutyl orthosilicate as silicon source to study the different pH values and temperatures. Adsorption performance. The physicochemical properties of HMS molecular sieves were characterized by BET, XRD and SEM. The results showed that the HMS molecular sieve material synthesized by dodecylamine as template was obtained after standing for 12 h in water bath for 12 h, pH 2 and calcination temperature was 550 °C. The best adsorption effectis HMS molecular sieve material synthesized by octadecylamine as template agent has the best adsorption effect when the aging time is water bath for 24 h, pH is 10, and calcination temperature is 550 °C. The adsorption rates are up to 71.72% and 74.78%, respectively.

The clean flue gas after FGD of coal-fired power plant is taken as the analysis object, and the particle size analysis for droplets under complex conditions is studied. Selected 600MW unit is typical enough, the particle size range is mainly between 3 and 20 μm. The test will provide the first-hand data for the removal of fine droplets.

The application of a new composite biofilter with a batch-type mud membrane composite biofilter (CSBF) series deep treatment filter (EBF) combination in urban domestic sewage was studied. The results of 20-day operation data show that the new filter process has good removal effect on COD, NH3-N, TN and TP. The average removal rate of COD during operation is 94.63%, the average removal rate of NH3-N is 99.02%, and the average removal rate of TN is 77.89%. The average removal rate of TP is 97.99%, and each index is stable to the first-class A standard of GB8978-1996, in which COD, NH3-N and TP can reach the surface water class IV standard.

Based on the strong adsorption, bacteriostatic and bactericidal effects of fulvic acid and silver ions, the preparation of silver alginate deodorizing gel with fulvic acid and its adsorption properties for formaldehyde toxic and harmful gas were studied. In the experiment, silver fulvate was used as the main ingredient, then sodium alginate was used as stabilizer. Under the heating condition, the mixture of fulvic acid silver and sodium alginate was mixed by mass ratio of 0, 0.3:1, 0.5:1, 0.7:1 and 0.9:1, and then immersed in calcium chloride solution to form gel. The new type of silver alginate deodorant gel was prepared and the deodorization of silver fulvate and sodium fulvate silver alginate was prepared. The colloid was characterized. IR analysis showed that fulvic acid was complexed with Ag⁺. Thermogravimetric analysis showed that the stability of the deodorant gel was greatly improved when the mass ratio of fulvic acid to Ag⁺ was 1:10.

In recent years, low-carbon research has become a research hotspot in urban system construction. Cities consume a large amount of carbon-based energy and are an important research object in low-carbon research. This paper first quantitatively analyzes the correlation between the three major industrial structures and the industrial energy consumption structure. At the same time, it studies the substitution of multiple energy sources, and obtains the mechanism of action of the low-carbon city system. Through the collection and analysis of data, the necessity of improving energy efficiency for the development of low-carbon cities has been proven. On the basis of this data analysis, this paper uses the method of energy consumption per unit output value to build a scenario analysis model of urban carbon emissions, puts forward four models of low-carbon urban system construction in terms of material flow, and gives the path planning and selection of low-carbon urban system construction.

This article cites a carbon footprint correction method and uses it to build an evaluation model for new buildings. By introducing a carbon footprint correction method, the goal is to build a high-efficiency, low-energy consumption evaluation model for new buildings. Comprehensively consider 15 indicators of 4 dimensions, including residential environment, energy efficiency and carbon footprint, then calculate the weight of each indicator and assign value analysis to it, and construct the evaluation model of the new building, and finally use the deviation rate of the carbon footprint to modify the evaluation level. This research can provide a usable evaluation model for the construction of new buildings, so as to scientifically and reasonably guide the planning and construction of new buildings with high efficiency and low energy consumption.

In recent years, with the development of the economy, environmental problems have become more and more serious. Air pollution not only affects the climate and the living environment, but also has an unimaginable impact on the human body. The adverse effects of air pollution are not limited to physiological health damage, but also involve negative effects in many aspects such as cognitive function, mood and behavior; air pollution can cause damage to the nervous system, brain function and cognitive function, and the damage is concentrated in children, Susceptible people such as the elderly and chronically ill patients. Air pollution can reduce subjective well-being, leading to anxiety, depression, and even increased risk of suicide. The physiological mechanisms by which different sources of pollution affect cognitive and mental health are different. In order for human beings to survive for a long time, research and countermeasures against the causes of air pollution are essential. This paper analyzes the causes of a series of effects of air pollution on humans and proposes corresponding countermeasures.

In this study, municipal sludge waste was used for protein extraction. Two pretreatment ways such as acid and alkaline hydrolysis were compared and the alkaline hydrolysis method was selected as the better way for protein extraction from the residual sludge. In order to obtain the optimal condition for protein extraction, the factors such as NaOH concentration, NaOH solution volume and pretreatment period were selected and optimized by response surface methodology, and the optimal condition for protein extraction was obtained: NaOH concentration was 3.85 mol/l , 24.0 g wet municipal sludge waste was added in 1 L of water, and the pretreatment period was of 12.16 h at 50 °C. Under the optimal extraction condition, the protein extraction yield could reach 5923±107 μg/g sludge, which were 2.07 folds than the initial production pretreated by NaOH.

In most of the past studies on disposal of waste plastic, due to the irreversible hazards for human environmental health (incineration), and the strict requirements of reaction conditions (pyrolysis, gasification), the cost of disposal and research also increases. In this study, we converted waste polyethylene (PE) plastic into high value-added organic products by high-temperature water (HTW) to obtain C1 to C5 short-chain fatty carboxylic acids (formic acid, acetic acid, propionic acid, butyric acid and valeric acid). In addition, the reaction parameters (temperature, time, oxidant amount, pH) were investigated under hydrothermal conditions, and the yield for PE to short-chain fatty acids (C1 -C5) was optimized to 20%. Then the concentration of TOC and IC in the solution was used to measure the conversion and degradation of PE. In addition, the oil phase and solid residue after the reaction were also discussed in this research.

"2 + 26" cities have been the focus areas for air pollution control in recent years. Encouraged and guided by national policies, they have brought tremendous development opportunities to the development of the atmospheric environmental protection industry. Air pollution has great harm to human health, industrial and agricultural production, and atmospheric climate. "2 + 26" cities play an important role in the country, and their air pollution control is urgent. Based on the "2 + 26" cities, this paper analyzes the pollution status and management prospects of the "2 + 26" cities with data. In addition, we put forward corresponding countermeasures based on the "2 + 26" urban pollution status, and provide a reference for relevant departments to carry out air pollution control.

According to actual situation of coal mine water disasters and the expert system research survey, the author has proposed the overall structure of the assistance decision system. The author has established the coal mine water disasters assistance decision platform based on dot NET soft. We has realized the formulation of determination and the preventing and controlling measure of the flood of old hole, roof, floor by using dot Net soft and the CLIPS computer language, combining with database platform established the expert knowledge library and the inference library; has solved the time and the spatial disposition question of the most superior sparse water volume by using the methods of finite element and the linear programming; Moreover aims at these questions of the note thick liquid, searching and draining water, the setup of waterproof rock seam, the forecast of water inflow volume, we has produced the correlation computational methods result and the operation craft.

The research studied microbial contamination in household GAC filters with residence time. Initial GAC effluents were collected and stored in different circumstances (glass cup, silver cup and new GAC), Bacterial growth in GAC effluents and stored samples were detected during the 3-day residence time simultaneously. Besides, microbiome diversities in the GAC unit were measured for one month. Three main conclusions were found: (1) the maximum microbial counts were higher in storage water than in GAC filters. (2) The growth rates were faster in filters than those in storage water in a shorter residence time and the microbial risks were apparent initially. (3) The pH level decreased with residence time and the oxidation properties increased due to the desorption of GAC. The research provided useful information for optimizing household purifiers usage.

In this paper, Mann-Kendall method and wavelet analysis method are used to analyze the annual rainfall and runoff data in Oujiang River Basin of Zhejiang Province, and the following conclusions are obtained: in the past 50 years, the annual average rainfall series increase and the annual runoff series decrease in Oujiang River Basin. The reason for this is that in 1960s, many hydraulic structures were built near Xuren station, such as river dams, which led to the rapid decline of runoff in the flood season. The results of Morlet wavelet analysis show that there is significant multi-time scale variation characteristic in the annual average rainfall and runoff series. The periodicity of the annual rainfall series exhibits three types of variation trends for different time-scales, i.e. 22-to 30-year scale, 10-to 22-year scale, and 3-to 10-year scale. While the periodicity of the annual runoff time series exhibits three types of variation trends for different time-scales, i.e. 15-to 25-year scale, 8-to 15-year scale, and 3-to 8-year scale.

A comprehensive experiment of Fenton-like method was designed to degrade oilfield pollutants. The effects of sodium persulfate on viscosity reduction of oilfield pollutants under different reaction conditions were investigated. The emphasis was put on the determination of viscosity, and the method of data processing should be learned to optimize the best viscosity reduction scheme. The experimental content can be closely combined with the basic theoretical knowledge of Applied Chemistry in oilfields, and can be applied to field practice. It helps students to understand the role of viscosity reducers and improve their functional ability of applying chemical knowledge. At the same time, the degradation and treatment methods of oilfield pollutants meet the requirements of green chemistry and enable students to establish environmental protection concept.

An applied chemistry comprehensive experiment has been designed using CaO for synthesis of biodiesel. Effects of calcination temperature, methanol concentration, reaction temperature, reaction time and amount of catalyst on transesterification reaction are investigated. Based on experiment, the relationship between the catalyst structure and its properties was analyzed. Furthermore, this experiment can cultivate student's abilities of analyzing and solving problem. And it can build up the innovation consciousness, competition and team spirit of students. At the same time, the biodiesel and its preparation are line with the development requirements of green chemistry, so that students can establish environmental protection concept.

The collected soil samples of Jining area were subjected to microwave digestion (HNO₃ + HF + H₂O₂), and the absorbance of the organic phase MIBK was determined by flame atomic absorption spectrophotometry after extraction with KI-MIBK. Results According to the measured results, within 20 meters, the content of cadmium increased gradually with increasing distance, and gradually decreased with increasing distance after 20 meters. The content of cadmium in the soil shows a clear change trend due to the distance from the source of pollution. Based on this change, favorable conditions suitable for crop growth can be created.

In Tianjin, there are many heavy pollution events with PM_2.5 as the primary pollutant. It is clear that the spatial and temporal distribution of PM_2.5 concentration and the source of heavy pollution process have far-reaching significance for the comprehensive management of PM_2.5. Using Tianjin's environmental data for 2014-2017 and in 2016, meteorological data, combined with WRF-Chem model, studied the spatial and temporal distribution characteristics of PM_2.5 concentration in Tianjin and the source of heavy pollution process. The results show that since 2014, the concentration of PM_2.5 in Tianjin has been decreasing year by year. The monthly variation curve of PM_2.5 concentration showed a "U"-shaped distribution, which was seasonal in winter and spring, and low in autumn and summer. The daily variation of PM_2.5 concentration is bimodal, with the main peak appearing at 08:00-09:00 and the second peak occurring at 21:00-00:00. The spatial distribution of PM_2.5 concentration in Tianjin is different in each season. The spring, summer, autumn and winter highvalue centers are located in Jinghai District in the southwest of Tianjin, Beichen District in the north of the central city, Wuqing District in the west and Yinzhou District in the north. The source of pollutants in the autumn and winter seasons of Tianjin simulated by WRF-Chem model showed that the local source contribution rate was 56%, and the external source transportation contribution rate was 44%, including transportation in Hebei Province and Shandong Province.

In the context of Beijing-Tianjin-Hebei coordinated development strategy, the paper selects 13 cities in Beijing-Tianjin-Hebei region as research objects, the CO₂ emission efficiency and emission reduction potential of each city are analyzed in order to provide reference for achieving the target of carbon emission peak through coordinated reduction among cities. Firstly, the emission efficiency of CO₂ of 13 cities in Beijing, Tianjin and Hebei in 2005-2014 was estimated using the non expected output SBM model. Then, the emission reduction potential of cities is quantitatively analyzed based on equity and efficiency of the emission reduction potential index. The results show that the overall carbon emission efficiency of Beijing-Tianjin-Hebei city is decreasing during the research period. The urban emission reduction potential index has the same trend, and Beijing has the lowest emission reduction potential and Tangshan has the highest emission reduction potential.

The pyrolysis characteristics of tea under nitrogen atmosphere were investigated, and the heating rate was 5, 10, 15, 20, 25 °C/min. The Kissinger and FWO methods were used to calculate the pyrolysis activation energy of tea. The results showed that the pyrolysis of tea can be divided into three pyrolysis stages: dehydration stage, rapid pyrolysis stage and carbonization stage. As the heating rate increasing, the peak temperature of the maximum pyrolysis rate shifts to the higher temperature, and the conversion rate increased at the peak of the maximum pyrolysis rate. The average value of pyrolysis activation energy of tea was 193.59 kJ/mol.

In this study, fluorescence excitation-emission matrix (EEM) combined with parallel factor analysis (PARAFAC) was employed to trace the behaviour of dissolved organic matter during vermicomposting of excess sludge under four dosages (0, 400, 800, 1600 mg/kg-TSS) of copper oxide nanoparticles (CuO NPs) stress. Determination of dissolved organic carbon (DOC) and total content of organic carbon (TOC), available nitrogen and available phosphorous indicated the presence of CuO NPs decrease the sludge stabilization by vermicomposting, but the organics degradation efficiency was not significantly inhibited with the increase of CuO NPs concentration. Fluorescence spectra results of dissolved organic matter (DOM) during the four groups of vermicomposting indicated CuO NPs led to the reduce of humic acid-like materials in vermicomposting. The positive relationship of protein-like component 1 and negative relationship of humic-like component 2 with CuO NPs concentrations in the substrates reflected by PARAFAC analysis suggested CuO NPs inhibit transformation of humic-like maters during the vermicomposting.

The fine particles (PM2.5) has become a major air pollution problem in China, and PM2.5 mass concentration monitor was used to measure the concentration of PM2.5, and whether it is accurate or not determines the quality of the atmosphere. In this study, the uncertainty of the calibration device of PM2.5 mass concentration monitor was estimated. By analyzing the source of the uncertainty of calibration device, the analytical method of the uncertainty was determined. It was proved that when the aerosol concentration were 50μg/m3, 200μg/m3 and 500μg/m3, the expanded uncertainty of the calibration device were 0.90%, 0.90% and 10.02% respectively, and it showed that the major influence factor of the uncertainty of the calibration device was the mass concentration indication error.

Source waste separation can greatly reduce the cost of solid waste treatment and disposal, and has considerable economic value. However, there are many kinds of domestic waste and their composition is complicated, which makes it difficult for residents to participate in it. As a collective behaviour of public participation, the difficulty of its existence can test the level of the role played by all participants. Therefore, based on the field research and literature comparison of Changzhi City, this paper establishes the analytic hierarchy process (AHP) evaluation model, and takes residents, government and market as the main participants to evaluate the classified participation of residents' garbage, and puts forward some suggestions to provide the basis for policy decision-making of public management in the field of environment.

Noise environment attracts people's attention constantly at present. In the city, the noise of boiler room is especially serious. Noise has not only physical but also psychological effects on human body. This paper introduces the noise reduction methods commonly used in boiler rooms and discusses the comparison of noise reduction effect and economic cost between sound insulation technology and sound absorption-insulation technology.

With the reform and opening up, China's economy had developed with high speed, but the problem of carbon emissions has become increasingly prominent. Based on the traditional environmental Kuznets model, this paper studies the relationship between carbon emissions and economic growth in Tianjin from 2009 to 2018, and considers three control variables of industrial structure, energy intensity and urbanization level. The impact of carbon emissions, the establishment of an extended Kuznets model for comprehensive analysis. The results show that: First, there is no inverted "U" relationship between industrial carbon emissions and economic growth in Tianjin, it is a kind of inverted "N" type curve relationship, and it is currently at the second turning point. Second, Tianjin's carbon emissions are also affected by industrial structure, energy intensity and urbanization rate. The share of secondary industry and energy intensity have a positive impact on carbon dioxide emissions, and the impact of urbanization on carbon emissions is also very low.

Nowadays, with the deepening of environmental protection concept, low-carbon transportation has gradually become the mainstream trend, the environmental cost of airport emissions research will gradually arouse social concern. Real low-carbon transport has become a country to achieve low-carbon energy saving, win the low-carbon war, sustainable development of the only way. Through the analysis of transportation costs and carbon emission costs related to aviation networks, reference to domestic and foreign calculation methods for carbon emissions environmental costs, the establishment of airport environmental cost model, through the analysis of pollutant components to reduce the cost of emission control, so as to reduce operating costs and achieve carbon emission reduction.

The increasing urban scale in China has led to an increase in the water consumption of urban residents. Freshwater resources have become more and more precious. This has increased the pressure on sewage treatment to a certain extent, so in this case it should be Urban sewage treatment issues are researched and improved and strengthened to allow freshwater resources to be recycled. These have very important practical significance for the urban ecological environment protection and the promotion of the scientific development of the city.

The use of coal is an important part of China's energy use and an important source of economic development. Due to the need for sustainable development and environmental protection, the problem of uncoordinated transactions between the two parties in the transaction process has been closely watched by all sectors of society. Based on the current shortage of coal market transactions, this paper designs a coal supply and demand matching process considering carbon emissions from an intermediary perspective, aiming at reducing carbon emissions and improving matching efficiency.

In view of the world carbon emission problem, the current status of low carbon economy research is reviewed. Based on the historical data of industrial carbon emissions in Hebei Province from 2008 to 2017, based on the historical data of industrial carbon emissions in Hebei Province, the Kaya decomposition model was used to find the industry affecting Hebei Province. The driving factors of carbon emission levels and the trends of various factors, and then combined with the LMDI model, the absolute contribution of each driving factor to the economic development of Hebei Province, and the specific analysis of carbon emission levels, and finally put forward rationalized emission reduction measures and suggest.

As the capital economic circle of China, Beijing-Tianjin-Hebei has always been a model for national development, but with the development of its economy, environmental issues have increasingly attracted the attention of the state. I Combined with the current background of the times, it is necessary to study the carbon emissions of the logistics industry in Beijing-Tianjin-Hebei. Through the research on the carbon emission situation of the logistics industry in Beijing-Tianjin- Hebei in the past ten years, the sample data was selected to construct the coupling index system of carbon emission and ecological environment in the logistics industry. The coupling model and the system coupling coordination degree model were analyzed to obtain the Beijing-Tianjin The coupling coordination degree of the vast ecosystem is in a relatively coordinated development stage, showing a trend of rising volatility. In response to this summary, the opinions on optimizing the industrial structure of the logistics industry and jointly controlling carbon emissions with the state and enterprises are given, in order to finally realize the low-carbon transformation and sustainable development of the logistics industry.

In the process of urbanization, each city should actively respond to the call of the country and regard sustainable development as the core of development. Based on this, cities should pay attention to urban environment and ecological benefits. In cities, urban sewage plants should pay more attention to sludge treatment and disposal. Through strict sludge treatment, the impact of heavy metals and pathogens in the sludge on the urban environment will be reduced. Based on the continuous updating of sludge treatment technology and processing equipment in China, urban sewage plants must strengthen the rational disposal of sludge. In order to improve the efficiency of sludge disposal and avoid pollution to the environment, it is particularly important to do a good job in sludge treatment status and technology research. Briefly analyse the source and nature of sludge in urban sewage treatment and the status of sludge treatment and disposal, and focus on the relevant sludge treatment technology to provide reference for better application of sludge treatment technology.

With the rapid development of industrialization and urbanization in China, environmental problems have become increasingly prominent and citizen's awareness of environmental protection has been constantly improved, especially for the new neighborhood avoidance projects which may cause significant environmental events. Moreover, it is difficult for citizens to find appropriate ways while safeguarding their personal rights and interests, which leads to NIMBY conflicts. Therefore, this paper makes an empirical analysis on the current situation and problems of NIMBY projects in Beijing, Tianjin and Hebei through questionnaire survey, and puts forward the strategies to solve the problems.

Gantangjiang River Basin was took as the object of study on non-point source pollution to establish a non-point source pollution model applicable to Gantangjiang River Basin based on SWAT model theory and make assess the applicability of the model. The relative error Res of monthly mean value was less than 25%, the monthly correlation coefficient R2 ranged from 0.72 to 0.89, and the monthly efficiency coefficient Ens was not less than 0.5, with a good fitting effect. This study demonstrated that it was feasible to simulate the non-point source pollution along the Gantangjiang River Basin, based on SWAT model. The simulation result showed that the load capacity of non-point source pollution in knowable basin changed in an irregular "W" trend as months went by. The rainfall intensity and capacity influence the pollution load in a certain extent.

The impact of influent NH₄⁺/-N concentration on partial nitrification performance was investigated in a biological sand filter. The removal kinetics model of NH₄⁺-N in partial nitrification-sand filter was established and its accuracy was verified. The results showed that the NH₄⁺-N removal rates and NO₂⁻-N accumulation rates stabled at about 60% and 94% respectively and the effluent NO₂⁻-N/NH₄⁺-N ratios were 1.20~1.39 when the hydraulic load was 1.0 m/d and the influent NH₄⁺-N concentration was 45~50 mg/L, indicating that the sand filter had good partial nitrification effect, and the effluent quality basically met the theoretical influent demand of anaerobic ammonia oxidation. The kinetic model of NH₄⁺/-N removal in sand filter could be described as S_h/S₀=exp(-1.0033S₀^−1.1337h) when the influent NH₄⁺-N concentration was 10.2~61.3 mg/L. The model had high accuracy and could provide scientific guidance for effluent quality prediction and optimization design.

Solid waste is some solid and semi-solidified waste objects produced in production and other activities in our lives, typical of which are industry, agricultural, life and dangerous solid waste. Due to the restrictions on conditions and objects themselves, some objects cannot be used in production and will become waste in mankind activities, so the existence of solid waste is unavoidable. Therefore, it is impossible to stop the production of solid waste. However, it cannot be abandoned either. Instead, it is necessary to carry out proper disposal to effectively prevent secondary pollution.

The Lingnan area is a region where frequent rainfall occurs in mainland China. In addition to the special occurrence period, the nighttime rainfall has obvious seasonal characteristics, which is different from the climatic boundary conditions during the daytime, and has a great influence on the migration and transformation process of atmospheric pollutants. By counting the observations of atmospheric particulate matter (PM_2.5, PM₁₀) before and after rainfall in the Pearl River Delta region, the average clearance rate of PM₁₀ and PM_2.5 for the whole region was 2.36% and 1.41%, and the average clearance rate of night rainfall was calculated. 6.44%, 4.22%. The results show that the rainfall can effectively remove atmospheric particulate pollutants through wet deposition, and the nighttime rainfall is more effective than the daytime rainfall on the atmospheric particulate matter. Through classification discussion, it is found that the greater the rainfall intensity, the longer the rainfall time, the larger the particle size, and the more obvious the advantage of night rain.

The dynamic removal of beryllium and copper element was achieved by slanting plate clarifier after the wastewater of beryllium copper production line was settled by PAC and PAM. When the pH of wastewater was 9.0, PAC with a mass concentration of 50 mg/L at a flow rate of 200-250 L/h and PAM with a mass concentration of 2 mg/L at a flow rate of 150-200 L/h were injected in the wastewater sequence, respectively. The treated wastewater flowed through the slanting plate clarifier at a flow rate of 30 m3/h and then filtered continuously through the filtration device. The results show that Be²⁺ and Cu²⁺ concentrations are lower than 5 μg/L and 2 mg/L, respectively, which complies with the Standards of GB 8978—1996. Therefore, the Be2+ and Cu2+ elements in the wastewater can be removed at the same time.

Cutinases(3.1.1.74) are serine esterases that belong to the α/β hydrolase family. Such enzymes are usually produced by phytopathogenic microorganisms in order to penetrate their hosts. Cutinase can degrade the stratum corneum in the leaves or the keratin of the cork in the bark. Cutinase hydrolyzes soluble esters, insoluble triglycerides and various polyesters. In addition to the hydrolysis reaction, cutinase also shows synthetic activity and transester activity. Therefore, as a multifunctional enzyme, cutinase has many fields of application. In recent years, it has been found that cutinase can biodegrade plastic and biomoodifie synthetic fibers. Cutinase is the most important enzyme in solving plastic pollution.

In the process of developing the ocean, the underwater robot's accurate positioning of the object is the key to the success of the underwater mission. Due to the interference of environment and other factors, the traditional GrabCut algorithm cannot accurately locate the target from the image collected by the visual sensor. This paper proposes an image segmentation algorithm based on depth Information, which is improved on the GrabCut algorithm and fuses depth information. First, the foreground area of the original image is extracted by using the depth information of the image to become a new image to be segmented. Then, two interactive operations are conducted on the new image. Finally, GrabCut algorithm is used to obtain the segmentation result of the target. Compared with GrabCut algorithm, the algorithm in this paper is more effective, which can improve segmentation accuracy and target positioning effect.

In order to adopt the conventional visual measurement technology to underwater application, this paper proposes an underwater image conversion method based on a multi-layer plane refraction model, which converts the underwater image into an air image. First, under the multi-layer plane refraction model, the imaging process of the underwater camera is modelled in the form of a four-dimensional light field parameterization, and the direction vector of the air image is calculated using the light field direction information. Then, the perspective projection transformation is used to obtain the corresponding pixel coordinates of the direction vector and the image plane. Finally, the transformed air image is obtained by interpolation method, using the mapping relation of the corresponding image point coordinates before and after the transformation. Simulation and experimental results show that the average error of the corrected image is 0.56 pixel, and the high-precision air image provides strong support for subsequent underwater 3D reconstruction.

With rapid development of the cities along the Pearl River, the ecological system of urban rivers is being threatened by pharmaceuticals and personal care products (PPCPs). In this study, the distribution of four common PPCPs triclocarban, diclofenac, ibuprofen and triclosan was summarized from literatures and the ecological risk of the PPCPs in surface water of urban rivers from the Pearl River was evaluated based on six different endpoints. Among these PPCPs, ibuprofen was the most predominant compound with the highest concentration of 1417 ng/L, and triclocarban had the lowest PNECs of 2.4 ng/L derived from reproduction toxic data. Additionally, PNECs of diclofenac and triclocarban derived from reproduction toxic data were lower than those derived from other effects, while the PNECs of ibuprofen and triclosan derived from biochemical toxic data (endocrine disruption effect) were lower than those derived from other effects. All the PPCPs exhibited high risk on certain effects, especially for triclocarban exhibited high ecological risk on cellular, growth, mortality and reproduction of aquatic life. The results demonstrated that triclocarban, diclofenac, ibuprofen and triclosan had adverse effects on aquatic life in the Pearl River and actions needed to be taken for PPCPs, especially for triclocarban.

This study mainly uses N-methyldiethanolamine (MDEA) as the main body of absorption, and uses three kinds of AAILs(AAILs), 1-butyl-3-methylimidazolium lysinate ([Bmim][Lys]), tetramethylammonium glycinate ([N1111][Gly]) and 1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]) as accelerator, respectively. That forms a new blended aqueous solution for CO₂ removal. The new AAILs-MDEA aqueous solution absorbent has stronger ability to absorb CO₂, faster absorption rate and lower equipment corrosion. When the gas flow rate is 500ml/min and the liquid flow rate is 150ml/min, the best removal efficiency is achieved. At 313.2K, the removal efficiency of MDEA-[N1111] [Gly] absorbent can reach 100%; the effect of the three new alkanolamine aqueous solutions on CO₂ absorption is: MDEA-[N1111][Gly]>MDEA-[Bmim] [Gly]>MDEA-[Bmim][Lys].

Pumps and fans play an important role in various sectors of the national economy, and are widely used in metallurgical, chemical, textile, petroleum, coal, electric power, national defense, light industry and agricultural production sectors. Because pumps and fans are general machinery, they are in nationals. The various sectors of the economy are widely used in production and life. From the production point of view, the proportion of power consumption of pumps and fans is very high, and its annual electricity consumption accounts for about one-third of the national electricity consumption, accounting for 40% to 45% of the national industrial electricity consumption. It can be seen that the power consumption of the pump and the fan itself is quite large, which requires the pump and the fan to work under low energy consumption and high efficiency conditions to achieve energy saving. I analyzed and summarized the actual problems encountered in daily production operations, and provided technical support. These technical experiences provide some reference experience for daily operation and equipment management. This paper closely combines the actual situation of thermoelectric enterprises, and focuses on the energy-saving adjustment of pumps and fans with the important auxiliary machines of thermal power plants as the breakthrough. The theory and practice combine the practice design and energy-saving adjustment analysis of thermal power enterprises, so as to adapt to social development well and quickly, to accelerate modernization. Struggle with the pace of construction.

AE leakage detection system is designed, ball valve leakage detection software is written, so that the real-time and accurate leakage is tested, and the detecting data are restored. This paper tries to determine an effective detection system by way of the theoretical and experimental analysis. The results make real-time detection possible. As a result, the ball valve leakage detection, location and estimation problems are preliminary solved and reference for future research is provided.

The layer composite rock mass is composed of soft rock and hard rock. The difference of their mechanical characteristics is obvious. It is difficult to describe comprehensively the complicated property with the existent constitutive model. Based on the rheological properties of soft rock and hard rock in the composite rock mass and the creep experiment curves, the rheological model can be used by connecting Burgers model in series with a plastic component. The rheological curves of the composite model under diverse stress level can be attained by multi-staged loading. The simulated result is proved good by comparing the theory curves and the experiment curves. The rheology principium of the complicated rock mass can be illuminated well by the model so that it could be popularly used in engineering practice.

In order to rapid treatment of first flush rainwater, a new flocculation-magnetic microsphere was prepared. And magnetic microspheres were prepared using the modified Stöber method. Magnetite (Fe₃O₄)-silica (SiO₂) core-shell microspheres have superparamagnetism verified by using XRD, FTIR and VSM analysis. Also, Fe₃O₄/SiO₂ (FS) microspheres have no significant reduction after at least reused five times. The optimal feeding order and conditions were flocculant, magnetic powder and PAM, reaction temperature 25 °C, static sedimentation time 30 min, and pH=7. Under the optimized condition, 62% of COD and 98% of turbidity were removed. Especially, Fe₃O₄/SiO₂ microspheres can effectively adsorb heavy metal ion.

A counter-flow moving bed and tube heat exchanger was designed and built for the heat transfer process of activated coke desorption, the heat transfer law between particles and tube wall surface in the moving bed was studied. The results show that with the increase of hot air inlet temperature and moving velocity of activated coke particles, the heat transfer coefficient inside the tube largely increases and then remains a small change. As the air velocity increases, the heat transfer coefficient inside the tube also shows increasing trend. In addition, with the increase of air temperature and particles moving velocity, total heat transfer coefficient of the moving bed and heat transfer coefficient outside tube increase first and then decrease. Finally, based on experimental data, the correlation coefficient of heat transfer coefficient outside the tube is obtained.

Effects of Rosemary Antioxidanton, extracted from Rosmarinus officinalis with different solvents, on the antioxidantive properties of polypropylene were evaluated by measuring the oxidation induction temperature. For comparison purposes, the effects of a synthetic phenolic commercial antioxidant Irganox B215, were also analyzed. The results showed that Rao is a more efficient thermal antioxidant for polymers compared to Irganox B215 in low concentration. Rao can be used as a natural antioxidant in place of synthetic antioxidants for polymers. Rao has the characteristic of being harmless and having high activity, good stability and abundant resources to be a good natural antioxidant.

Global warming is not only an important problem in the survival and development of human beings, but also an urgent problem to be solved by the contemporary government. China is not only a big country in the world, but also ranks first in the world in total population, economic scale and economic growth rate. With the improvement of the national economic strength, China's greenhouse gas emissions are also increasing year by year, the ecological environment has been seriously damaged, leading to the rising of the environment at the same time is also facing severe environmental challenges and huge pressure to reduce emissions, so, How to deal with the problem of climate warming is particularly important in China.

During the process of removing the sulfur-containing gas in the semi-aqueous gas by using the rubber desulfurization process, a large amount of exhaust gas overflows from the top of the rubber desulfurization regeneration tank, which has a heavy odor. After testing, the exhaust gas contains a large amount of carbonyl sulfur (COS), ethanethiol (CH₃CH₂SH), volatile phenols and other volatile organic gases (VOCs), which has a certain toxicity, volatile and complex chemical composition, causing harm to the surrounding and operators. However, there is no stable, single, and effective exhaust gas treatment for the exhaust gas overflowing from the tannin desulfurization regeneration tank. Characteristics of the exhaust gas generated during the production process of the semi-water gas desulfurization and oxidation regeneration tank is studied in this paper. After process designed, debugged, optimized, and inspected repeatedly, the method of "washing absorption + condensation removal of water + filter + fan + activated carbon adsorption" is proposed. When the exhaust gas outlet concentration is 542mg/m³, the gas outlet concentration is 58.1mg/m³ and the processing system efficiency achieve 89.28% after debugged stably, which has reached the local environmental protection emission limit (120mg/m³).

The article uses the SWOT analysis framework to analyze the advantages, disadvantages, opportunities, and threats of the environment in the ethnic minority areas of the Southwest Frontier, then judges the importance of each dimension of influence in the SWOT. In order, the environmental governance model of the southwest ethnic region was put forward, and strategic choices were made for the environmental governance of the southwest ethnic region.

Air pollution has increasingly become a threat to people's daily life. Exposure to air pollution will have a negative impact on people's health. However, little research has been done on the impact of air pollution on people's different ways of exercise. The purpose of this study is to explore and determine the relationship between particulate matter that has an aerodynamic diameter of 2.5 microns or smaller (PM_2.5) exposure and different exercise patterns of healthy adults. Thirty volunteers were recruited and validated by the equivalent model of PM_2.5 approximate inhalation volume-time. The predictive model of PM_2.5 particulate matter exposure (y) and time (x) was derived as follows: y = 1.4663x-593.41. It is concluded that when people are exposed to air, the shorter the exercise time, the less PM _2.5 will be inhaled. Therefore, when people exercise outdoors, the use of fast running will be the best way of reference, and the amount of PM_2.5 inhaled is the least.

More evidences showed that there was a relationship between air pollution and hospitalization of acute exacerbation of chronic obstructive pulmonary disease. This paper aimed to investigate the effect of air pollution (fine particulate matter, inhalable particle, sulfur dioxide, nitrogen dioxide and ozone) on the hospitalization for acute exacerbation of chronic obstructive pulmonary disease. Thus, generalized additive model was built to evaluate the impact of air pollution on people's respiratory system. After controlling for temperature and relative humidity, the increase in average daily concentrations of PM_2.5, PM₁₀ and O₃ would aggravate the risk of admission of patients with acute exacerbation of chronic obstructive pulmonary disease, and the results were statistically significant.

Simultaneous measurements of mass concentrations of PM_2.5 along with other co-existence pollutants viz., SO₂, CO, NO₂ and O₃, were studied with hourly datasets and the data of meteorological conditions were measured per 3 hours from 1^st Sep 2014 to 30^th Sep 2016 at Fuzhou city, China. The concentration of PM_2.5 is 28.42 ± 14.75 in the study period. Meanwhile, the seasonal ratio of PM_2.5 was also analysed, with the maximal value as 0.61 in winter, 0.52 in spring, 0.49 in autumn and 0.44 in summer. This implied that fine particulate reaches the maximal value in winter and the minimum value in summer. The correlation coefficient between concentrations of PM_2.5 and SO₂, CO, NO₂, and O₃ concentrations were 0.64, 0.52, 0.53 and 0.67. There existed negative correlation between PM_2.5 and T (– 0.27), HCC (– 0.13), WS (– 0.16), VIS (– 0.46), DT (-0.31) and RF (-0.10). Subsequently, the impacts of typhoons on the mass concentrations of PM_2.5 during September 10th 2016 to September 16th 2016 were analyzed during which the mass concentration of PM_2.5 decreased at a large extent and the fine particulates have more prominent changes during the typhoon period compared with coarse particulates.

As one of the central cities of the Guangdong-Hong Kong-Macao Greater Bay Area (GBA), Shenzhen has excellent air environment performance. Based on the construction of Kaya identity and LMDI method, this paper decomposes the SO₂ emission of Shenzhen industry in 2009-2016 and explores the impact of seven factors on the SO₂ emission change of Shenzhen, including population, development level, industrial structure, energy structure, energy consumption intensity, energy pollution intensity and end treatment. The results show that: population and development level factors have the effect of increasing emissions, industrial structure and energy structure factors have less impact, while energy consumption intensity, energy pollution intensity and end treatment factors have the obvious effect of reducing emissions. Combined with the current situation of development, it is suggested that Shenzhen should promote the upgrading of industrial structure and energy structure, promote the progress of production technology, and strengthen the end treatment. Other cities in GBA should actively learn from the relevant measures and governance experience taken by Shenzhen to improve the capacity of industrial air pollution reduction.

Global warming is one of the most serious challenges facing mankind in the sustainable development of twenty-first Century. Related studies have shown that 90% of the probability of global warming may be caused by excessive emissions of greenhouse gases (GHG), which will pose a serious threat to the survival and development of human beings. To actively respond to the climate change, The Chinese Government promised that the carbon emissions will peak around 2030 in Paris Climate Change Conference. In order to realize the smooth progress of carbon emission reduction, it is necessary to understand China's carbon emission reduction factors, make clear the time of carbon emission and explore the potential of carbon emission reduction, and finally find a way of carbon emission reduction in accordance with China's national conditions.

In this paper, the numerical simulation method is used to study the gas diffusion in a limited space under the scene of poisonous gas attack or leakage. Based on the STAR-CCM + software, the toxic gas diffusion process in a limited enclosed space under specific flow field conditions was simulated and analyzed, and the effects of different wind speeds on the diffusion law and concentration field distribution were studied.

In order to have a better understanding of agricultural carbon emission efficiency in China and in east, west and central regions, slack based measure (SBM) under the undesirable outputs is used for measuring the agricultural carbon emission efficiency, where the agricultural carbon emission in 2006 to 2015 in 30 provinces of China is estimated as undesirable output. Then the input-output looseness is used for exploring the reasons for the efficiency difference in different regions and their improvement direction. The results show that the efficiency in east is high and stable, and that in central and west is low. In terms of the whole country, the two indexes with the biggest room for improvement are agricultural capital input and land input. The redundancy rates of agricultural capital input in the three regions are relatively high, while those of land input are high in the central and west regions. This paper aims to provide some references for making rational policies on agricultural carbon emission reduction with regional differentiation and overall coordination.

Under the background of the haze's influence to tourism, this study takes Xi'an, China as a case to explore the response characteristics of domestic tourists to the haze weather in tourism cities, and draws the conclusion as follows. First, although the suddenly severe haze weather will causes the inconvenience of travel and the decline of tourism quality, but the tourists still take the urban public transport to go on their trip by the negative ways, such as changing the tourism destination or ignoring the haze's influence. When the tourists face the destination choice, they generally prefer the indoor tourism destinations which are less affected by haze weather, but the juvenile and low-educated tourists still prefer outdoor and suburban tourism destinations even if encountering the haze in their trip; Second, the tourists are very dissatisfied with the tour in the haze weather, and the degree of haze's influence on tourists' perception is generally showed as "photograph > vision >experience> mood", but the tourists with different characteristics have different perceptions to the haze; Last, the tourists' attention rate has increased significantly after experiencing haze weather in this tour, but the tourists with different characteristics have a significant differences in the growth rate of haze's attention.

In order to rationally apply organic fertilizer from black soldier fly (BSF) feces, the effects of different amounts (0, 2%, 4%, 6%, 8%) of BSF feces on rice growth were studied through rice pot experiments. The results showed that the dry matter mass and the yield of rice treated with 4% BSF feces were the highest, compared with the control, which were increased by 40.20% and 49.59%, respectively. While the application of 8% BSF feces inhibited the rice plant height, above-ground dry matter mass and rice yield, which were reduced by 9.98%, 22.59% and 22.66%, respectively. The 4% BSF feces promoted the growth of rice and increased yield, which is an reasonable amount of fertilizer.

The environmental behavior of rock and oil pollutants in soil has always been the focus of environmental protection research. In this paper, the sources, hazards and existing states of the stone oil pollutants in the soil are briefly introduced, and their migration, adsorption and degradation behaviors in the soil, as well as their behavior characteristics and influencing factors are also introduced. It is of great significance to protect the ecological environment and promote the sustainable development of petroleum industry to fully understand the environmental behavior of stone and oil pollutants in soil.

In order to alleviate the air pollution caused by nitrogen and sulfur oxides discharged from ships, the efficient method of deoxidization and desulfurization of marine diesel engine exhaust gas has been explored. In this study, at present, the mainstream technology of ship exhaust gas removal at home and abroad, wet scrubbing oxidation denitration technology is taken as the research object. Ultraviolet (UV) online irradiation is introduced into the process of wet scrubbing oxidation denitration of NaClO₂ solution. The effects of different parameters, such as the concentration of NaClO₂, the temperature of washing solution, the concentration of O₂ and SO₂, on the removal of No are studied. The reaction mechanism is further analyzed. The results show that photochemical reaction will take place between UV online irradiation and NaClO₂ solution, resulting in a large number of active radicals with strong oxidation, which can obviously enhance the effect of No removal by wet scrubbing of NaClO₂ solution. It can be seen that the wet scrubbing oxidation denitration technology combined with UV online irradiation can greatly improve the efficiency of desulfurization and denitrification of ship's exhaust gas. It is an efficient method of deoxidization and desulfurization of ship's diesel engine exhaust gas, which is of great help to alleviate exhaust gas pollution.

A method is presented that combining the Mcclements suspension model with the cylindrical model to solve the complexity of calculating the scattered acoustic pressure around the cylinder, when suspended particles are contained in the water. The scattered acoustic pressure of an infinitely long cylinder in water is derived based on the boundary conditions. Then, the wave number of the particle-containing suspension is calculated by the Mcclements suspension model, which is combined with the scattered acoustic pressure of an infinitely long rigid cylinder in water. The scattered acoustic pressure of an infinitely long rigid cylinder in suspension is obtained. The results show that the content of sediment particles has a greater impact on the distribution of scattered acoustic pressure. The scattered acoustic pressure is more directional with the increase of the content of sand particles, laying a foundation for further research on other target objects in suspension.

To minimize the emission pollution of nitrogen oxides (NOx) in marine diesel engine exhaust, based on the existing NOx treatment technology, the "NaClO₂-sea water" wet denitrification technology was further proposed. The denitrification performance of NaClO₂ solution in seawater and NaClO₂ solution in fresh water was analyzed by self-designed and built experimental platform. Moreover, the effects of the temperature of the absorption solution, the initial concentration of NaClO₂ and the concentration of NO in diesel exhaust gas on the denitrification performance of NaClO₂ sea water solution were studied. The experimental results showed that the denitrification rate of NaClO₂ solution with seawater as solvent was slightly lower than that of NaClO₂ solution with fresh water, but the denitrification duration of seawater solution had obvious advantages over that of fresh water solution. In addition, by increasing the temperature of the absorption solution and the initial concentration of NaClO₂ and decreasing the concentration of NO, the denitrification rate of NaClO₂ sea water solution was increased. Whereas, if the temperature exceeded a certain limit, the continuous denitrification time of the solution would be decreased. Therefore, "NaClO₂-sea water" wet denitrification technology has the advantages of cheap raw materials and long continuous denitrification time. High denitrification efficiency can be achieved by optimizing reaction conditions, so it can be used for denitrification of marine diesel engine exhaust gas.

With the development of economy and the change of life-style, non-point source pollution has become one of the key points of ecological environment regulation. In order to research how to control non-point source pollution according to the specific situation of towns, this paper selected Hongshi Town, Laohu Town and Xinxing Town of Tongchuan City in Shaanxi Province as the representative residential areas for analysis. In this paper, the present situation of non-point source pollution in the three towns were analyzed, and the regulation measures were put forward according to the specific situation of each town, such as laying sewage pipes or rain trenches, adding public toilets and garbage collection points. Through the comprehensive treatment of non-point source pollution, the ecological security of cities and towns has been guaranteed, the ecological balance of regions has been maintained, and a benign ecological security pattern is forming.

At present, China's rural economy is developing rapidly, followed by environmental issues that are of common concern to all. Reform and opening-up have brought vitality to rural township enterprises. At the same time, the development of township enterprises has also brought greater pressure to the rural ecological environment. The pollution load borne by the rural ecological environment has increased dramatically, resulting in increasingly prominent rural environmental problems. It not only seriously affects the health of the broad masses of peasants, but also affects social stability and restricts the sustainable development of the country. The increasingly prominent problems of rural ecological environment restrict the further development of China's rural economy. In the construction of a new socialist countryside today, to solve the problem of rural environmental pollution has become a top priority. With the rapid development of rural economy and society, the process of agricultural industrialization and urban-rural integration is accelerating. Based on the air pollution index, this paper analyzes the characteristics and causes of environmental pollution in the development of township enterprises and the Countermeasures for environmental protection.

In order to solve the problem that the existing photocatalyst recovery efficiency and photocatalytic efficiency cannot be obtained at the same time, the inner cavity structure of the inner cavity designed according to the Kangda effect has excellent fluid performance, and the light-shielding and breathable structure designed to imitate the louver structure can prevent the damage caused by ultraviolet radiation overflow, the inner surface reflective layer can reduce the waste of light energy. This high-efficiency photocatalytic air purification device has been designed, the overall structure is simple and efficient, and easy to clean and maintain. The whole is small and compact, and the placement is not limited, adapt to a variety of more closed space, adapt to all kinds of people.

In this paper, the operation cost, the total investment in environmental infrastructure construction, the exhaust gas treatment facilities are selected as the input variables and the industrial exhaust gas emission, the industrial SO₂ removal quantity, the industrial dust removal quantity and the industrial dust removal quantity as output variables of air pollution control. Besides, the efficiency of air pollution was controlled in Hebei province from static and dynamic aspects were measured from 2005 to 2015 by exploiting BC2 model. Finally, according to the analysis results, corresponding policy suggestions are given from different perspectives, including strengthening independent innovation capability, adjusting and optimizing industrial structure, increasing investment in pollution control, optimizing capital source and using structure of pollution control, and constructing reasonable and effective external supervision mechanism.

How to efficiently use multi-source remote sensing images to extract the coastal wetland vegetation landscape information of the Yellow River Delta, and provide scientific basis for wetland protection, utilization and ecological restoration, is of great significance. In this paper, the vegetation coverage of Landsat TM/OLI remote sensing images from 1984 to 2018 is dynamically monitored, and the remote sensing images are analyzed using NDVI and pixel dichotomous models. The conclusions are as follows: From 1984 to 2018, the coverage of vegetation in the northern part of the Yellow River Delta is relatively low, and the coverage of vegetation in the south due to agricultural development is high; Over the past 30 years, the vegetation coverage area of the Yellow River Delta has shown an overall upward trend, and the area of low vegetation coverage areas has declined significantly, decreasing by 19.64% from 1984 to 2018. For the study of the Yellow River Delta coastal wetland, the methods used include the NDVI and pixel dichotomy model, and the results obtained are consistent with the facts, which can help the local ecological protection or soil and water conservation.

Whether it is the historical experience of developed countries or the practice of most developing countries, it has been shown that in the stage of national industrialization and infrastructure construction, environmental pollution will accompany it. With the development of the country's industrialization and the improvement of people's awareness of environmental protection, the discharge of pollutants such as industrial wastewater and waste gas has caused people to pay more attention to environmental issues. This article comprehensively analyzes the impact of infrastructure construction on environmental pollution based on data from eastern China in 2009-2017. The research results show that infrastructure construction has a significant impact on environmental pollution in eastern China. Specifically, infrastructure construction has significantly increased the discharge of industrial wastewater and exhaust gas. Therefore, China needs to pay more attention to certain new pollution sources in the process of increasing infrastructure construction. All regions should strengthen cross-regional environmental protection cooperation and focus on green development.

With the continuous development of our country's economy, the living standard in rural areas has been greatly improved, rural water consumption has also increased significantly, especially in recent years, the popularity of rural tap water, improve the rural water availability, rural sewage has also increased significantly. As China's rural sewage treatment technology and facilities are generally backward, some rural areas even have no sewage treatment facilities, a large number of living directly into the surface or rivers. According to the characteristics and analysis of the discharge of rural domestic sewage, this paper puts forward the method of purifying rural domestic sewage with the technology of tank.

Ship exhaust is one of the main sources of air pollution, at present; there are three methods for treating ship exhaust, including desulfurization, denitration, and desulfurization-denitration integration. This paper introduces the mainstream desulfurization and denitration technologies, and the desulfurization-denitration integration technology can achieve the simultaneous removal of multiple pollutants, which will become the main method of ship exhaust treatment in the future and has broad development prospects. This paper introduces some treatment methods and advantages and disadvantages of ship exhaust, and hopes to provide some references for the treatment of ship exhaust.

Hydrodynamic cavitation is a promising technology in the degradation of the residual antibiotics which can exist in the environment for long periods as they are chemically stable. Varied methods for degrading antibiotics, bubble dynamics models coupled with chemical reactions, experiment setup and cavitation generators are evaluated. A novel self-excited cavitation reactor which can produce pulse and cavitation using the fluid characteristic is proposed. Compared with traditional hydrodynamic cavitation generator, the self-excited pulsed cavitation jet generator have longer hydraulic detention time, faster bubble collapse, more hydroxyl radical production, better treatment effect, and wider application prospects. Simple design, high energy efficiency and no secondary pollution contribute to the great potential of selfexcited cavitation reactor in wastewater treatment.

The process of freeze-thaw not only directly affects the phosphorus cycle in non growing season, but also shows that the impact of cold winter and frequent freeze-thaw on the ecosystem will continue to the following growing season. This effect is closely related to soil properties, microbial activity and community structure, climate conditions, vegetation composition and management methods. However, due to the differences in research methods, many results about the effects of freeze-thaw on soil nitrogen and phosphorus cycle are quite different. After the freeze-thaw cycle, the content of available phosphorus in the two soils decreased, and the decreasing trend was Lou soil > arsenic sandstone.

The development of high-performance electrochemical materials plays an important role in CO₂ reduction efficiency and cost effectiveness. In this work, nitrogen doped porous carbon matrix was designed and fabricated from zeolitic imidazolate frameworks (ZIF-8). Pyrolysis temperature was investigated to achieve the best performance to convert CO₂ into CO. The suitable temperature is 700 °C which could make the catalyst containing good conductivity and activity. The highest Faradaic efficiency of CO is close to 25% at potential of -1.0 V.

In order to solve the problem of insufficient accuracy and effectiveness of the current analysis model of the durability of reinforced concrete, the corrosion process of concrete by acid rain and the corrosion process of steel bars by acid rain are analyzed; based on the acid rain corrosion process, the structure of reinforced concrete composite beams under acid rain erosion Carbonization depth of medium concrete; Corrosion depth of reinforced concrete composite beam structure was obtained by carbonization depth; Durability index was calculated by carbonization depth and corrosion depth. It is suitable for analysis of the influence of acid rain pollution on the durability of reinforced concrete composite beam structures.

Objective: To study the determination conditions of nitrite in pickles by spectrophotometry, select the best experimental conditions, determine the content of nitrite in pickles under different storage conditions, and find a better storage method for pickles. Methods: A certain amount of pickle was homogenized. Saturated boric acid and deionized water were added. The water bath was cooled to room temperature. Potassium ferrocyanide and zinc acetate were added and filtered to obtain a backup filtrate. The nitrite was used as a standard to determine the pickle sample solution at 538 nm. Absorptance at place. Results The nitrite concentration of the sun-dried sample: 1.8435 mg/kg dry; 0.3441 mg/kg with pickling solution; the nitrite concentration of the indoor light sample during the day: 0.5462 mg/kg dry; 0.2048 mg/kg with pickling solution; Nitrite concentration of samples in cabinets protected from light: dry 1.84 mg/kg; with pickling solution 1.2973 mg/kg; nitrite concentration of samples at high temperature (27 °C): 1.2973 mg/kg; room temperature (20 °C) samples Nitrate concentration: 0.7511 mg/kg; Nitrite concentration at low temperature (7 °C): 0.2048 mg/kg. Conclusion: The dry sample has a higher nitrite content than the pickled solution sample, the dark sample has a higher nitrite content than the strong light sample, and the high temperature sample has a higher nitrite content than the low temperature sample. Therefore, storage conditions such as pickling solution, proper light and low temperature are selected.

The water quality often showed obvious spatial and temporal changes characteristics of a river system in the basin. However, the conventional water quality diagnosis method which based on the standard of cross-section, easily overlook the spatial-temporal characteristics of pollution load in the basin. Under the concept of ecological environment spatial management and control, the method for diagnosing water environmental problems which had been named the Equivalent pollution Load Duration Curve method was proposed. Combining the hydrological process of the main stream with the water quality concentration of the section, it could been used to effectively identify the main over standard pollutants and their sources in different control units of the river basin. From the results of the application evaluation of a certain basin, it showed that the excessive period was concentrated in the flood season. The main excessive factor was total phosphorus (TP) in the upstream area of the basin, which indicates that for the upstream control unit of the Basin, agricultural and other non-point sources were the main pollution sources. Meanwhile the main over standard pollutant was NH3-N, which was over standard in the whole period in the river estuary area. The pollution reduction control scheme of this control unit should focus on the industrial and living sources.

Underground pipelines are an important infrastructure for cities and an important basis for ensuring the normal operation of urban production and life. As the earliest types of pipelines built in the urban underground pipe network, the water supply network and the heat pipe network of many cities have already experienced aging phenomena. Pipeline leakage and pipe burst accidents frequently occur, resulting in serious waste of water resources and greatly increasing operating costs [1]. At the same time, there are major security risks. Pipeline leak detection is an important task. There are many kinds of pipeline leakage detection methods [2], and the best one is the water leakage detection correlator, which can locate the location of the leakage point. However, the correlation instrument can not eliminate the environmental noise interference well during the leak detection process, and the positioning result sometimes has a large deviation. In order to solve this problem, an underground pipeline leakage monitoring and precise positioning method based on multi-point signal compensation is proposed. The method increases the third acquisition point of the noise signal, and compensates for the positioning deviation caused by the environmental noise through the signal of the third point, achieving accurate positioning of leak points.

With continuous development of economy, human beings are increasingly destroying the environment. Therefore, attention must be paid to conservation of soil and water. The environmental issues in China are very serious currently, which are mainly reflected in soil erosion and water shortage, moreover, the phenomenon of soil desertification has become very serious in our country, and the ecological environment has been destroyed, flood or soil desertification both cause damage to the environment. Therefore, the work of conservation of soil and water and sediment reduction is of great significance. This paper mainly studies the benefits of conservation of soil and water and sediment reduction in China.

Environmental protection has attracted more and more attention in today's society. Traditionally, most land use projects do not consider the impact of, or account for changes to, ecosystem services. To better evaluate the environmental degradation, we created an ecological services valuation model. Our EDC-GP Model provides a quantitative analysis of Environmental Degradation in different areas. Then apply it to both large national project and small city-based project.

At this stage, the ecological environment has been severely destroyed in our country; this situation is becoming more and more serious. Under the influence of the complex and severe situation mentioned above, in order to effectively solve the abovementioned bad development trends, the country proposes the sustainable development strategy, it is expected that through the implementation of this strategy, the previous extensive management mode will gradually be transformed into harmonious development mode between man and nature. This article mainly elaborates on the influence the sustainable development view on current hydrogeological and environmental geological work, this paper deeply explores current status of hydrogeological and environmental geological work, as well as some issues needing attention in China, and put forward some targeted suggestions and measures, through the explanation of this paper, It is hoped that environmental geology and hydrogeology will be better developed on the basis of the view of sustainable development.

In this experiment, livestock and Poultry feces (chicken manure and pig manure) were mixed in different proportions, and cow dung and co-substrates (rice bran) were added in chicken manure and pig manure in different proportions, so as to analyze and study the transformation of livestock and poultry feces by black soldier fly larvae (BSFL) under different treatments. The results showed that the conversion rate of chicken manure by BSFL was higher than that of pig manure, and the highest conversion rate of pure chicken manure was 15.31%. Adding cow dung to chicken manure and pig manure resulted in a significant decrease in the conversion rate of BSFL, and the addition of cow dung was not conducive to the conversion of mixed feces by BSFL. The transformation effect of BSFL on chicken manure, pig manure and cow manure is: chicken manure >pig manure >cow dung. The addition of rice bran can promote the transformation of chicken manure and pig manure by BSFL. When the proportion of adding is 15%, the conversion rate of BSFL is the highest, which is 19.74% and 19.25%, respectively.

In order to explore the effect of cadmium in insect frass on the growth of maize, the pot experiment method was selected to investigate the effects of black soldier fly frass with different cadmium contents (0mg•kg-1,2mg•kg-1,12mg•kg-1,28mg•kg-1) on maize plant height, chlorophyll content, photosynthetic rate and cadmium accumulation in plants. The results showed that there were no difference between treatments for maize plant height. Insect frass with 28 mg•kg-1 cadmium contents improved chlorophyll content and photosynthetic rate at 30th day. Cadmium content in plants and roots increased significantly with increasing of cadmium content in insect frass. The highest Cadmium content of plants and roots were 0.32mg•kg-1 and 1.50mg•kg-1 respectively.

In order to understand the adsorption properties of insect feces on heavy metals, White grubs feces and Black soldier fly larvae (BSFL) feces were selected as the adsorption materials to study the adsorption properties of insect feces on Cu²⁺ and Cd²⁺. The results showed that the adsorption effect increased significantly with the increasing of the amount of insect feces, and the best adsorption effect were 2g White grubs feces and 4g BSFL feces in 100ml (10mg/L) Cu²⁺ and Cd²⁺. With increasing of concentration Cu²⁺ and Cd²⁺ (0-20 mg/L), the adsorption quantity of Cu²⁺ and Cd²⁺ increased. Adsorption quantity of BSFL feces for Cu²⁺ was more than White grubs feces, while for Cd²⁺ was less than White grubs feces when concentration of Cd²⁺ was over 10mg/g. With the increase of pH, the adsorption rate of White grubs feces and BSFL feces on Cu²⁺ and Cd²⁺ decreased significantly.

Ocean is the natural environment for human survival and development. The exploitation and utilization of marine resources is one of the main methods to solve the pressures of the world's population, resources and environment. Moreover, the development of marine resources put forwards an important problem for mankind to prevent marine pollution, the various domestic waste produced by various ships in the ocean is one of the important sources of marine pollution. Therefore, preventing marine pollution caused by ship domestic waste, studying and formulating reasonable antipollution countermeasures, which has great practical significance for maintaining the sustainable development of the marine environment. For this reason, this paper analyzes the marine pollution caused by marine domestic waste, and proposes a waste recovery ship based on trimaran technology for recycling ship domestic waste.

In recent years, although the water environment quality of Tianjin has improved, there are still some problems such as poor water environment quality, shortage of water resources and weak water ecological function. Based on the analysis of the current situation of water environment in Tianjin, this study analyzes the existing problems and puts forward the implementation path matrix of water environment protection, which can reduce water environment pollution.