Efficacy of chalcopyrite bioleaching using a pure and a mixed bacterium

查看全文 作　　者：Muqing [1]Qiu;Shuiying [2]Xiong;Weimin [2]Zhang

机构地区：[1]Institute of Ecology, College of Life Science, Zhejiang University, Hangzhou 310029, China;[2]Department of Environmental Engineering, East China Institute of Technology, Fuzhou 344000, China

出　　处：《Journal of University of Science and Technology Beijing》索引2006年第13卷第1期,共4页

摘　　要：To determine the efficacy of chalcopyrite bioleaching using pure cultures of Thiobacillus ferrooxidans or Thiobacillus thiooxidans and a mixed culture composed of Thiobacillus ferrooxidans and Thiobacillus thiooxidans, experiments were carried out in shake flasks with [Fe^(2+)] 4 g.L^(-1) and S 1 g.L^(-1) at pH=1.80, 130 r/min and 30℃. The tests showed that the copper extraction in a mixed culture composed of Thiobacillus ferrooxidans and Thiobacillus thiooxidans is higher than that in a pure culture. On the other hand, an important potential of Thiobacillus thiooxidans to leaching chalcopyrite was indicated. Thiobacillus thiooxidans can prevent jarosites accumulating on the substrate and allow further copper to dissolute through the action of ferric ion. The selection of the suitable pH in a leaching solution would be significant. Thiobacillus thiooxidans and Thiobacillus ferrooxidans play an important role in the bioleaching process. Finally, the mechanism and the reason for iron precipitation were also discussed in detail. 关键词：黄铜矿生物滤化混合培养氧化铁硫杆菌硫杆菌属硫氧化剂

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Efficacy of chalcopyrite bioleaching using a pure and a mixed bacterium

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