journal6 ›› 2013, Vol. 34 ›› Issue (2): 72-76.DOI: 10.3969/j.issn.1007-2985.2013.02.016

• Biological resources • Previous Articles     Next Articles

Microbial Detoxification of Hexavalent Chromium from Chromium-Containing Slag


  1. (School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China)
  • Online:2013-03-25 Published:2013-04-23
  • About author:HE De-wen(1968-),male,was born in Yongzhou City,Hunan Province,professor of Central South University,majoring in environmental material research
  • Supported by:

    Supported by the National Advanced Technology Research and Development Project (863 Project 2010AA6492080)

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

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