期刊
BIORESOURCE TECHNOLOGY
卷 146, 期 -, 页码 799-802出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.08.002
关键词
Antimony; Sulfate reducing bacteria; Sb mine drainage; Crystal structure
资金
- Knowledge Innovation Program of Chinese Academy of Sciences [KZCX2-YW-335]
- Program of 100 Distinguished Young Scientists of the Chinese Academy of Sciences
- National Natural Science Foundation of China [U1120302, 41150110154]
Antimony (Sb(V)) in Sb mine drainage has adverse effects on the receiving water environments. This study for the first time demonstrated the feasibility of using sulfate-reducing bacteria (SRB) to convert sulfate ions in SMD into sulfides that reduce Sb(V) to Sb(III) and to form complex with Sb(III) as precipitate. The principal compound in the precipitate was stibnite (Sb2S3) at pH 7 and pH 9. The Sb(V) removal mechanism is sulfate-reduction and sulfide oxidization-precipitation, different from the conventional SRB-precipitation processes for heavy metals. The Sb(V)/sulfate ratio is noted an essential parameter affecting the Sb removal efficiency from SMD. (C) 2013 Elsevier Ltd. All rights reserved.
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