Microbial Detoxification of Hexavalent Chromium from Chromium-Containing Slag

doi:10.3969/j.issn.1007-2985.2013.02.016

Abstract

Abstract: In this paper,treatment and recovery of hexavalent chromium(Cr(Ⅵ)) from chromium-containing slag by bacteria was studied.The work showed that a bacterial strains of Ch-1 isolated from chromium-containing slag can efficiently accelerate Cr(Ⅵ) leaching and remove it.Moreover,bacteria Ch-1 can effectively change the structure of chromium-containing slag by Scanning Electron Microscopy(SEM) and the Energy Dispersive X-Ray (EDX),which is benefitial to Cr(Ⅵ) leaching and its detoxification by changing Cr(Ⅵ) to Cr(Ⅲ).The effect of detoxification by bacteria of Ch-1 is obvious,the toxicity in leached slag was 3.3 μg/g lower than the national standard of 5 μg/g,and the recovery rates of hexavalent chromium are more than 90%.

Key words: Chromium-containing Slag, bacteria, treatment, recovery

HE De-Wen, LIU Huan, JIANG Chong-Wen, DUAN Hao-Peng, LIU Lei. Microbial Detoxification of Hexavalent Chromium from Chromium-Containing Slag[J]. journal6, 2013, 34(2): 72-76.

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