Abstract
In this paper, nano-irons were successfully synthesized by Suaeda salsa extraction (SSE) and properties of the nano-iron particles were studied. Results of scanning electron microscopy (SEM) showed that the average of particle size of nano-iron particles were about 23∼53 nm. In addition, the selected area electron diffraction (SAED) and X-ray diffraction (XRD) indicated that most of the synthesized nanoparticles were amorphous, but only a few were crystalline. Moreover, energy dispersive spectrometer (EDS) and fourier transform infrared spectroscopy (FTIR) reflected that the nano-iron particles were coated with organic substances containing O-H, C=C, C-N and other functional groups, which were as reducing agents and stabilizers during the synthesis of nano-iron particles. At 25°C, when the dosage of nano-irons was 1.0 g/L and the initial concentration of Cr(VI) was 5 mg/L, the removal rate of Cr(VI) could reach 100% in 5 minutes.
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