Influence of Ni2+ and Mg2+ on the growth and activity of Cu2+-adapted Thiobacillus ferrooxidans

被引：36
|
作者：
Li, HM [1 ]
Ke, JJ [1 ]
机构：
[1] Chinese Acad Sci, Inst Chem Met, Beijing 100080, Peoples R China
来源：
HYDROMETALLURGY | 2001年 / 61卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Thiobacillus ferrooxidans; Ni2+ and Mg2+; bioleaching;
D O I：
10.1016/S0304-386X(01)00167-0
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The ferrous ion oxidation ability of Cu2+-adapted Thiobacillus ferrooxidans strains affected by different concentrations of Ni2+ and Mg2+ in a Leathen medium was investigated. Cu2+-adapted strains have been developed through serial repeated subculturing. The level of tolerance of Cu2+-adapted strains to Ni2+ was improved in comparison with that of unadapted strains. The toxicity of Mg2+ to Cu2+-adapted T. ferrooxidans was almost the same as its toxicity to unadapted strains. The toxicity of ternary combinations of Ni2+, Mg2+ and Cu2+ to Cu2+-adapted strains was stronger than that of binary combinations of Ni2+ and Cu2+ or Mg2+ and Cu2+. Compared with unadapted strains, Cu2+-adapted strains exhibited better leaching efficiency in the bioleaching of nickel and copper from nickel-bearing pyrrhotite. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：151 / 156
页数：6
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