Effect of polyethylene glycol on chalcopyrite bioleaching with Acidithiobacillus ferrooxidans

被引：0

作者：

Zhang, Rui-Yang ^{[1
]}

Wei, De-Zhou ^{[1
]}

Liu, Wen-Gang ^{[1
]}

Lu, Tao ^{[1
]}

Shen, Yan-Bai ^{[1
]}

Cui, Bao-Yu ^{[1
]}

机构：

[1] College of Resources and Civil Engineering, Northeastern University, Shenyang,110819, China

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2015年 / 25卷 / 07期

关键词：

Iron compounds - Polyethylenes - Copper compounds - Polyethylene glycols;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Polyethylene glycol (PEG) was used to improve the bioleaching rate of chalcopyrite by Acidithiobacillus ferrooxidans (At. f) strain XZ11. The effect of PEG on the Fe2+ oxidizing activities of Acidithiobacillus ferrooxidan and bioleaching of chalcopyrite were investigated. The surface morphologies and phase composition of chalcopyrite after bioleaching were characterized by SEM and EDS. The results show that PEG with relative molecular mass greater than 200 can promote the Fe2+ oxidizing activities of Acidithiobacillus ferrooxidan After bioleaching for 20 d, the copper extraction yield of chalcopyrite with 30 mg/L PEG 2000 is 451.70 mg/L, which increases by about 1.11 times compared with the bioleaching without PEG. Native-like structure, holes and Fe (III)-O-OH form on the erosion surface of chalcopyrite. PEG can increase the cell density of Acidithiobacillus ferrooxidan and Fe3+ concentration in the leaching solution, consequently, accelerates the chalcopyrite oxidation dissolution. ©, 2015, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals. All right reserved.

引用

页码：2015 / 2021