Abstract: The electrochemical behaviors occurring in the interface of chalcopyrite-carbon paste and electrolyte were evaluated by cyclic voltammetry method in the presence and absence of bacterial strains. The effects of temperature, limit switching cathodic potential, Fe2+ and Cu2+ irons on the cyclic voltammetry spectra were examined. The results showed that an oxidation peak of polysulfide formation appeared at 0.45 V in the bioleaching of low grade chalcopyrite. At -0.25 and -0.43 V, reduction peaks of the formation of bornite and chalcocite appeared respectively. The higher the temperature, the faster the accelerating rate of chalcopyrite. The value of oxidation peak current at 65℃ was twice as that of at 35℃. The addition of Fe2+ and/or Cu2+ ions in solution also enforced the oxidation of chalcopyrite.

Key words: low grade chalcopyrite, carbon paste electrode, cyclic voltammetry, Acidianus brierleyi

摘要： 电解液中含与不含布氏酸菌时，采用循环伏安法研究了黄铜矿-碳糊电极与电解液之间的电化学行为，并探讨了温度、阴极电位、Fe2+和Cu2+对循环伏安曲线的影响. 结果表明，低品位黄铜矿在0.45 V出现生成多硫化合物的氧化峰，在-0.25和-0.43 V出现生成Cu5FeS4和Cu2S的还原峰. 温度升高促进黄铜矿氧化分解，65℃时的峰电流为35℃时的2倍. 添加适量Fe2+和Cu2+能促进黄铜矿的氧化分解.

关键词: 低品位黄铜矿, 碳糊电极, 循环伏安法, 布氏酸菌