title: Removal of antimony (Sb(V)) from Sb mine drainage: biological sulfate reduction and sulfide oxidation-precipitation.
abstract: 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.
authors.affiliation: Laboratory of Environmental Pollution and Bioremediation, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Huawei
authors.initials: H
authors.lastname: Wang
authors.affiliation: Laboratory of Environmental Pollution and Bioremediation, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Fulong
authors.initials: F
authors.lastname: Chen
authors.affiliation: Laboratory of Environmental Pollution and Bioremediation, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
authors.forename: Shuyong
authors.initials: S
authors.lastname: Mu
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Daoyong
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Laboratory of Environmental Pollution and Bioremediation, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China. Electronic address: xlpan@ms.xjb.ac.cn.
authors.forename: Xiangliang
authors.initials: X
authors.lastname: Pan
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan. Electronic address: djlee@ntu.edu.tw.
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
authors.affiliation: Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, Taiwan.
authors.forename: Jo-Shu
authors.initials: JS
authors.lastname: Chang
mesh_terms: D000965:Antimony / Q000737:chemistry*; D002681:China; D018360:Crystallography, X-Ray; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008906:Mining; D010100:Oxygen / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D008670:Metals; D013431:Sulfates; D013440:Sulfides; D014874:Water Pollutants, Chemical; D000965:Antimony; D010100:Oxygen
keywords: Antimony; Crystal structure; Sb mine drainage; Sulfate reducing bacteria