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  • ISSN 1005-2518 
  • Founded in 1988
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Analysis of Potential-pH Diagrams for Refractory Gold Concentrate Bio-leaching Systems

  • LI Chao ,
  • ZHANG Zhiqian ,
  • LI Hongxu
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  • 1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China
    2.Beijing Key Laboratory of Green Recovery and Extraction of  Precious Metals,Beijing    100083,China

Received date: 2013-12-17

  Revised date: 2014-02-24

  Online published: 2014-08-26

Abstract

Potential-pH(Eh-pH) diagram is an important means for thermodynamic analysis,it can reflect the various thermodynamic equilibriums in directly ways and help to determine the trends of chemical reactions.So the Eh-pH diagram plays an important guiding role in biological leaching refractory gold concentrate.In this article,the Eh-pH diagrams of FeS2-H2O,FeAsS-H2O system under the condition of 313 K,pH=0~7.0,E=-1.2~1.2 V were drawn by thermodynamic calculation and analyzed briefly.Results indicated that the stability zone of pyrite and arsenopyrite was respectively under potential of 0.336 V and 0.133 V in acidic solution,which means that arsenopyrite would be oxidized and dissolved at low potential.

Cite this article

LI Chao , ZHANG Zhiqian , LI Hongxu . Analysis of Potential-pH Diagrams for Refractory Gold Concentrate Bio-leaching Systems[J]. Gold Science and Technology, 2014 , 22(2) : 77 -82 . DOI: 10.3969/j.issn.1005-2518.2014.02.077

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