化工进展

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低温下非离子表面活性剂加速细菌浸出黄铜矿

张德诚,朱 莉,罗学刚   

  1. 西南科技大学材料科学与工程学院
  • 出版日期:2008-04-05 发布日期:2008-04-05

Effect of non-ionic surfactants in bacteria leaching of chalcopyrite at low temperature

ZHANG Decheng,ZHU Li,LUO Xuegang   

  1. School of Material Science and Engineering,Southwest University of Science and Technology
  • Online:2008-04-05 Published:2008-04-05

摘要: 为了提高中温菌氧化亚铁嗜酸硫杆菌(Acidithiobacillus ferrooxidans)在低温(8~10 ℃)下浸出黄铜矿的浸出速率和最终浸出率,研究了非离子表面活性剂(吐温-20、吐温-60、吐温-80)加速细菌浸出黄铜矿的作用。通过对浸矿溶液中铜的浸出率以及细菌浓度的测定来评价表面活性剂对氧化亚铁嗜酸硫杆菌浸出效果的影响。研究结果表明:3种吐温类表面活性剂在低温条件下对细菌浸出黄铜矿均有一定加速作用,其中吐温-20的加速浸出效果最好,其最佳添加量为0.01%,经过90天后最终浸出率可达49.87%。

Abstract: To enhance the efficiency of bioleaching of chalcopyrite by using Acidithiobacillus ferrooxidans at a low temperature (8~10℃),the catalytic effects of non-ionic surfactants were investigated. The effects of the surfactants on bioleaching of chalcopyrite were evaluated by measuring the leaching rate of copper and the density of bacteria cells in solution. The results showed that the surfactants had promoting functions on the bioleaching process at a low temperature and TW-20 was the most effective surfactant. The optimum concentration of TW-20 was 0.01%. The final bioleaching rate was 49.87% for 90 days.

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