Use and development of technology for producing porous composite sorbents based on man-made raw materials

The aim of this paper was to study the characteristics of porous composite materials based on man-made waste from aluminum and silicon industries. Using chemical and X-ray diffraction methods of analysis, it was found that the dust of silicon production consisted, on average, of 86% silica, and the remaining harmful impurities, due to their low content in the samples, were not recorded by the device, which indicated the potential use of this man-made material as a basis for the development of sorption material. Also, the dust of electrostatic precipitators from aluminum production was used in the samples. Liquid glass was used as a binder for the above-described components. This substance has adhesive properties; in addition, it is known that the interaction of NaOH, which is part of liquid glass, and fine-crystalline silicon is accompanied by active release of hydrogen following an exothermic reaction. Therefore, fine-crystalline silicon was used as a reagent for imparting a porous structure to the sorbent. The increased content of fine man-made waste near metallurgical enterprises proves the need for their use in various industries. Furthermore, studies have shown that the studied industrial materials can be used as raw materials for the production of sorbents.