铜萃取改质剂对氧化亚铁硫杆菌吸附和浸出行为的影响
毕业论文关键词 溶剂萃取；壬基酚；氧化亚铁硫杆菌;黄铜矿;吸附
Effect of copper extraction modifer on adsorption and leaching behavior of Acidiobacillus ferrooxidans
Abstract
The bioleaching of copper sulfide containing is a hotspot in the field of wet metallurgy of non-ferrous metals, nonylphenol is copper solvent extraction commonly used modifier. The comparative study of containing different concentrations of nonylphenol in the organic phase under different pollution model of Ahiobacillus ferrooxidans growth, and the in chalcopyrite surface adsorption and leaching behavior of influence. Experimental results show that contained different concentrations of nonylphenol organic contaminated bacteria growth was obviously inhibited, the degree of inhibition from large to small: bacteria and culture medium have been polluted, cultivation of the radical is pollution, contamination of bacteria, bacteria and culture medium have not been polluted, the higher the concentration of nonylphenol organic phase the inhibition effect is stronger. Contaminated by organic phase different modes, Ahiobacillus ferrooxidans in chalcopyrite surface adsorption rate from high to low: bacteria and culture medium have been polluted, cultivation of the radical is pollution, contamination of bacteria, bacteria and culture medium have not been polluted. But 0.1% of the concentration of nonylphenol pollution when the adsorption rate was 0.02% nonylphenol pollution than to low. Bacteria and culture medium have not been polluted, the leaching rate of copper can be up to 57%, and contained nonylphenol 0.02% of the organic phase to different modes of pollution, the copper leaching rate were: culture medium polluted in experimental group was 45.15%, bacterial contamination was 35.1%, and bacteria and medium are polluted is 17.9%.
Keywords solvent extraction; nonylphenol; Ahiobacillus ferrooxidans; chalcopyrite; adsorption
目录
1 文献综述 1
1.1背景 1
1.2 氧化亚铁硫杆菌 2
1.3氧化亚铁硫杆菌在矿石表面的吸附行为 2
1.4 氧化亚铁硫杆菌浸出低品位黄铜矿的浸出机理 3
1.6 研究内容 8
1.7研究的目的与意义 8
2实验材料与方法 9
2.1实验材料 9
2.2实验方法 9
2.2.1矿石的预处理 9
2.2.2壬基酚污染的模拟 9
2.2.3氧化亚铁硫杆菌的培养 10
2.2.4氧化亚铁硫杆菌的吸附 10
2.2.5低品位黄铜矿的生物浸出 11
2.3性能表征 11
2.3.1细胞计数 11
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