Effect of pH values on the extracellular polysaccharide secreted by Acidithiobacillus ferrooxidans during chalcopyrite bioleaching

被引：0

作者：

Run-lan Yu ^{[1
,2
]}

Jing Liu ^{[1
,2
]}

Jian-xi Tan ^{[3
]}

Wei-min Zeng ^{[1
,2
]}

Li-juan Shi ^{[1
,2
]}

Guo-hua Gu ^{[1
,2
]}

Wen-qing Qin ^{[1
,2
]}

Guan-zhou Qiu ^{[1
,2
]}

机构：

[1] School of Minerals Processing and Bioengineering,Central South University

[2] Hunan Entry-Exit Inspection and Quarantine Bureau

[3] Key Laboratory of Biometallurgy,Ministry of Education

来源：

International Journal of Minerals Metallurgy and Materials | 2014年 / 21卷 / 04期

关键词：

chalcopyrite; bioleaching; polysaccharides; acidity; Acidithiobacillus ferrooxidans;

D O I：

暂无

中图分类号：

TF18 [微生物冶金];

学科分类号：

080601 ;

摘要：

The pH value plays an important role in the bioleaching of sulphide minerals. The effect of pH values on the extracellular polysaccharide secreted by Acidithiobacillus ferrooxidans was investigated in different phases of bacterial growth during chalcopyrite bioleaching. It is found that extracellular polysaccharide secretion from the cells attached to chalcopyrite is more efficiently than that of the free cells in the bioleaching solution. Three factors, pH values, the concentration of soluble metal ions, and the bacterial growth and metabolism, affect extracellular polysaccharide secretion in the free cells, and are related to the bacterial growth phase. Extracellular polysaccharide secretion from the attached cells is mainly dependent on the pH value of the bacterial culture.

引用

页码：311 / 316

页数：6

共 16 条

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Yu Run-lan
Ou Yang
Tan Jian-xi
Wu Fa-deng
Sun Jing
Miao Lei
Zhong Dai-li
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