Bioleaching of heavy metals from mine tailings by indigenous sulfur-oxidizing bacteria: Effects of substrate concentration

被引：124

作者：

Liu, Yun-Guo ^{[1
]}

Zhou, Ming ^{[1
]}

Zeng, Guang-Ming ^{[1
]}

Wang, Xin ^{[1
]}

Li, Xin ^{[1
]}

Fan, Ting ^{[1
]}

Xu, Wei-Hua ^{[1
]}

机构：

[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2008年 / 99卷 / 10期

关键词：

bioleaching; mine tailings; heavy metal; substrate concentration; partitioning;

D O I：

10.1016/j.biortech.2007.08.064

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The aim of this study was to determine the effect of substrate concentration (elemental sulfur) on remobilization of heavy metals from mine tailings by indigenous sulfur-oxidizing bacteria. Also, the variation in the binding forms of heavy metals before and after bioleaching was explored. This work showed the laboratory results of bioleaching experiments on Pb-Zn-Cu mine tailings. The results showed that 97.54% Zn, 97.12% Cu, and 44.34% Pb could be removed from mine tailings by the bioleaching experiment after 13 days at 2% w/v substrate concentration. The results also indicated that substrate concentration 2% was found to be best to bacterial activity and metal solubilization of the five substrate concentration tested (0.5%, 1%, 2%, 3%, and 5%) under the chosen experimental conditions. The bioleaching had a significant impact on changes in partitioning of heavy metals. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4124 / 4129

页数：6

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