期刊
HYDROMETALLURGY
卷 105, 期 3-4, 页码 259-263出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2010.10.012
关键词
Cyclic voltametry; Intermediate species; Passivation layer; Chalcopyrite; Bioleaching
资金
- CSIRO (Australia)
- National Natural Science Foundation of China [50321402, 50621063]
- China National Basic Research Program [2004CB619201, 2010CB630901]
- Graduate Degree Thesis Innovation Foundation of Central South University [1960-71131100009]
A mixed culture of moderately thermophilic microorganisms was used to bioleach chalcopyrite at 48 degrees C, and it showed good performance in copper extraction. The electrochemical response of massive chalcopyrite electrodes bioleached for various periods up to 20 days was studied using cyclic voltametry. The results showed that as bioleaching progressed, the anodic and cathodic current signals decreased and the anodic peak moved gradually from low potential to high potential. Furthermore, the oxidation peak of chalcopyrite disappeared at a late stage of bioleaching, while the oxidation peak of intermediate species (CuxS (1
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