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渣中6价铬的微生物解毒研究
引用本文:何德文,刘欢,蒋崇文,段浩鹏,刘蕾.渣中6价铬的微生物解毒研究[J].吉首大学学报(自然科学版),2013,34(2):72-76.
作者姓名:何德文  刘欢  蒋崇文  段浩鹏  刘蕾
作者单位:(中南大学冶金科学与工程学院,湖南 长沙 410083)
摘    要:详细研究了微生物处理铬渣中6价铬Cr(Ⅵ)及其回收Cr(Ⅲ)的方法.研究成果表明,来自铬渣场的一株名为Ch-1的细菌能有效地加速Cr(Ⅵ)浸出和去除;此外,通过扫描电子扫描电镜(SEM)和X射线仪器(EDX)观察,Ch-1细菌能有效改变浸出后铬渣的结构,这有利于铬渣中Cr(Ⅵ)浸出及其解毒为毒性低的Cr(Ⅲ);最后经浸出毒性试验,淋溶渣的毒性为3.3 μg/g,远低于国家标准5 μg/g,且6价铬Cr(Ⅵ)的回收率高达90%以上.

关 键 词:铬渣  微生物  解毒  回收

Microbial Detoxification of Hexavalent Chromium from Chromium-Containing Slag
HE De-wen , LIU Huan , JIANG Chong-wen , DUAN Hao-peng , LIU Lei.Microbial Detoxification of Hexavalent Chromium from Chromium-Containing Slag[J].Journal of Jishou University(Natural Science Edition),2013,34(2):72-76.
Authors:HE De-wen  LIU Huan  JIANG Chong-wen  DUAN Hao-peng  LIU Lei
Affiliation:(School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China)
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%.
Keywords:Chromium-containing Slag  bacteria  treatment  recovery
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