低温下非离子表面活性剂加速细菌浸出黄铜矿  

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

作　　者：张德诚[1] 朱莉[1] 罗学刚[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《化工进展》2008年第4期540-543,563,共5页Chemical Industry and Engineering Progress

基　　金：国家科技支撑计划项目课题资助(2007BAB18806)

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%。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.

关 键 词：生物浸出 非离子表面活性剂 低温 吐温-20 

分 类 号：TF111.3[冶金工程—冶金物理化学] TF18