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ADVANCES IN SULFIDATION OF ZEROVALENT IRON FOR WATER DECONTAMINATION
Li, J., X. Zhang, Y. Sun, L. Liang, B. Pan, W. Zhang, and X. Guan.
Environmental Science & Technology 51(23):13533-13544(2017)

Sulfidation has been shown to improve contaminant sequestration by zero-valent iron (ZVI). This review summarizes developments in ZVI sulfidation by describing the technology's progress through synthesis, characterization, and water remediation and treatment. Under most circumstances, sulfidation can enhance sequestration of various organic compounds and metal(loid)s by ZVI to varying extents. S-ZVI reactivity toward contaminants is strongly dependent on S/Fe molar ratio, sulfidation method, and solution chemistry. Sulfidation also can improve the selectivity of ZVI toward a targeted contaminant over water under anaerobic conditions. This summary includes a description of the mechanisms of sulfidation-induced improvement in contaminant sequestration by ZVI and identifies current knowledge gaps and future research needs of S-ZVI for environmental application.



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