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.
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.
Bioresour Technol. 2013 Oct;146:799-802. doi: 10.1016/j.biortech.2013.08.002. Epub 2013 Aug 12.
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.
矿坑水中的锑（Sb(V)）会对受纳水体环境产生不良影响。本研究首次证明了利用硫酸盐还原菌（SRB）将矿坑水中的硫酸盐离子转化为硫化物，从而将 Sb(V)还原为 Sb(III)并与 Sb(III)形成沉淀的可行性。在 pH 值为 7 和 pH 值为 9 时，沉淀中的主要化合物为辉锑矿（Sb2S3）。Sb(V)的去除机制是硫酸盐还原和硫化物氧化沉淀，与传统的 SRB 沉淀重金属的过程不同。Sb(V)/硫酸盐比值是影响从矿坑水中去除 Sb 效率的一个重要参数。
