Author/Authors :
Wang، نويسنده , , Huawei and Chen، نويسنده , , Fulong and Mu، نويسنده , , Shuyong and Zhang، نويسنده , , Daoyong and Pan، نويسنده , , Xiangliang and Lee، نويسنده , , Duu-Jong and Chang، نويسنده , , Jo-Shu، نويسنده ,
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.
Keywords :
Antimony , Sulfate Reducing Bacteria , Sb mine drainage , crystal structure
