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In this work, density functional theory (DFT) calculation, X-ray photoelectron spectroscopy (XPS) and electrochemistry analysis were carried out to investigate the dissolution process and passivation mechanisms of chalcopyrite in the presence of sulfur and iron oxidizing microorganisms. Both DFT calculation and XPS analysis indicated that the formula of chalcopyrite should be Cu+Fe3+(S2−)2. Disulfide...
In this study, the role of pyrite in sulfuric acid leaching of chalcopyrite (CuFeS2) was investigated by leaching experiments, X-ray photoelectron spectroscopy (XPS) and electrochemical measurements. The leaching experiments showed that the addition of pyrite remarkably promoted chalcopyrite dissolution by controlling the redox potential over an appropriate range. XPS analysis revealed that the presence...
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