The complicated substrates enhance the microbial diversity and zinc leaching efficiency in sphalerite bioleaching system

文献类型： 外文期刊

第一作者： Xiao, Yunhua

作者： Xiao, Yunhua;Dong, Weiling;Liang, Yili;Zhang, Xian;Niu, Jiaojiao;Ma, Liyuan;She, Siyuan;Liu, Xueduan;Yin, Huaqun;Xiao, Yunhua;Dong, Weiling;Liang, Yili;Zhang, Xian;Niu, Jiaojiao;Ma, Liyuan;She, Siyuan;Liu, Xueduan;Yin, Huaqun;Xu, YongDong;Fan, Fenliang;Zhang, Xiaoxia;Zhang, Xiaoxia;He, Zhili

作者机构：

关键词： Sphalerite bioleaching;Artificial enrichment microbial consortium;16S rRNA gene sequencing;Shannon diversity index;Linear regression analysis

期刊名称：APPLIED MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：4.813； 五年影响因子：4.697 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： This study used an artificial enrichment microbial consortium to examine the effects of different substrate conditions on microbial diversity, composition, and function (e.g., zinc leaching efficiency) through adding pyrite (SP group), chalcopyrite (SC group), or both (SPC group) in sphalerite bioleaching systems. 16S rRNA gene sequencing analysis showed that microbial community structures and compositions dramatically changed with additions of pyrite or chalcopyrite during the sphalerite bioleaching process. Shannon diversity index showed a significantly increase in the SP (1.460), SC (1.476), and SPC (1.341) groups compared with control (sphalerite group, 0.624) on day 30, meanwhile, zinc leaching efficiencies were enhanced by about 13.4, 2.9, and 13.2 %, respectively. Also, additions of pyrite or chalcopyrite could increase electric potential (ORP) and the concentrations of Fe3+ and H+, which were the main factors shaping microbial community structures by Mantel test analysis. Linear regression analysis showed that ORP, Fe3+ concentration, and pH were significantly correlated to zinc leaching efficiency and microbial diversity. In addition, we found that leaching efficiency showed a positive and significant relationship with microbial diversity. In conclusion, our results showed that the complicated substrates could significantly enhance microbial diversity and activity of function.

分类号： Q939.9`Q81

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