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Journal of Central South University

, Volume 18, Issue 2, pp 381–385 | Cite as

Effect of L-cysteine on bioleaching of Ni-Cu sulphide by A. manzaensis

  • Zhi-guo He (贺治国)
  • Jian-cun Zhao (赵健存)
  • Wan-jie Liang (梁万洁)
  • Yue-hua Hu (胡岳华)Email author
  • Guan-zhou Qiu (邱冠周)
Article

Abstract

The effect of L-cysteine in different concentrations on the bioleaching of Ni-Cu sulfide was studied with an extremely thermophilic archaea, Acidianus manzaensis. It is found that adding certain amounts of L-cysteine to the bioleaching system of Ni-Cu sulfide largely enhances the leaching rate. X-ray diffraction (XRD) patterns show the change of bioleached solid residues and the effect of L-cysteine on the surface charges of minerals. Zeta potential and IR spectra of mineral surface show that the interaction between L-cysteine and mineral leads to the formation of metal complex, which is propitious to the bioleaching of Ni-Cu sulfide by Acidianus manzaensis.

Key words

Acidianus manzaensis L-cysteine Ni-Cu sulfide bioleaching surface charge Zeta potential 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Zhi-guo He (贺治国)
    • 1
    • 2
  • Jian-cun Zhao (赵健存)
    • 1
    • 2
  • Wan-jie Liang (梁万洁)
    • 1
    • 2
  • Yue-hua Hu (胡岳华)
    • 1
    • 2
    Email author
  • Guan-zhou Qiu (邱冠周)
    • 1
    • 2
  1. 1.School of Minerals Processing and BioengineeringCentral South UniversityChangshaChina
  2. 2.Key Laboratory of Biometallurgy of Ministry of EducationCentral South UniversityChangshaChina

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