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《Chemical Industry and Engineering Progress》 2008-04
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Effect of non-ionic surfactants in bacteria leaching of chalcopyrite at low temperature

ZHANG Decheng,ZHU Li,LUO Xuegang(School of Material Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)  
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.
【Fund】: 国家科技支撑计划项目课题资助(2007BAB18806)
【CateGory Index】: TF18
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