OUYANG Xiao-xue1,2，ZHANG Guo-ping1*，LI Hai-xia1,2，FU Zhi-ping1,2，CHEN Jing-jing1,2
(1. The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002,China;
2.University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: The removal of Sb in wastewater by sulfate-reducing bacteria was conducted. The effects of pH, temperature and the initial Sb concentration as well as the evolution of the reaction were evaluated. The results showed that the optimal pH range was 6.0-7.0 and the optimal temperature was 30-35℃.The removal of Sb was more than 90%. In the reaction, organic carbon was converted to HCO3- and SO42- was reduced to H2S, resulting in the decrease of SO42- and Eh. In the meantime, Sb(Ⅴ) was reduced to Sb(Ⅲ),which reacted with H2S and was precipitated as Sb2S3.This mechanism resulted in the removal of Sb in wastewater.
Key words: sulfate-reducing bacterium ; wastewater; Sb; removal
EARTH AND ENVIRONMENT Vol. 42, No.5, Tot No.301, 2014, Page 663-668
