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›› 2010, Vol. 10 ›› Issue (5): 927-932.

• 过程与工艺 • 上一篇    下一篇

低品位黄铜矿在嗜热布氏酸菌下的循环伏安分析

刘代云 魏振东 华美 刘慧勇   

  1. 福州大学化学化工学院 福州大学化学化工学院 福州大学化学化工学院 福州大学化学化工学院
  • 收稿日期:2010-09-15 修回日期:2010-11-02 出版日期:2010-10-20 发布日期:2010-10-20
  • 通讯作者: 刘慧勇

Cyclic Voltammetry Analysis of Bioleaching of Low Grade Chalcopyrite by Thermophilic Acidianus brierleyi

LIU Dai-yun WEI Zhen-dong, HUA Mei, LIU Hui-yong   

  1. College of Chemistry and Chemical Engineering, Fuzhou University College of Chemistry and Chemical Engineering, Fuzhou University College of Chemistry and Chemical Engineering, Fuzhou University College of Chemistry and Chemical Engineering, Fuzhou University
  • Received:2010-09-15 Revised:2010-11-02 Online:2010-10-20 Published:2010-10-20
  • Contact: LIU Hui-yong

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

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

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