铜萃取有机物影响下氧化亚铁硫杆菌吸附和浸铜行为研究
毕业论文关键词：生物浸铜；溶剂萃取；嗜酸氧化亚铁硫杆菌；LIX984N；吸附；
Abstract
In the solvent extraction process, the organic matters entrained and dissolved in the raffinate impact Acidothiobacillus ferrooxidans with the raffinate recycling to bioleaching environment. Through simulating the organic pollution process of different concentrations of Lix984N , Lix84IC and Lix860N, the growth and attachment to ore surfaces of bacteria and the bioleaching of chalcopyriteunder different infected way were studied. The results showed that the growth of Acidothiobacillus ferrooxidans was inhibited by the organic matters. With the concentration of LIX agents increasing, the inhibition strengthened. The activity of Acidothiobacillus ferrooxidans in different polluted ways for three LIX agents (Lix984N, Lix84, Lix860N) reduceed as following trend: Medium and the cells of bacteria governed by transfection <only medium contaminated <only bacteria infected <the control. In the adsorption process, the adsorption ratio of the cells to the chalcopyrite surface in any contamination way of the organic matters is higher than that of bacteria in the control. With increasing of LIX agent concentration the adsorption equilibrium time correspondingly reduced. In the bioleaching process by Acidothiobacillus ferrooxidans influenced by organic matters, the growth of bacteria slowed down, the leaching efficiency becam lowe.
Keywords: copper bioleaching; Acidothiobacillus ferrooxidans; solvent extraction;LIX984N；attachment;
目录
目录 iii
1 绪论 1
1.1 嗜酸性氧化亚铁硫杆菌 1
1.2 微生物浸出机理 2
1.3 氧化亚铁硫杆菌在硫化矿表面的吸附行为研究 2
1.4 铜溶剂萃取有机相对生物浸出的影响 3
1.5 研究的目的、意义和内容 4
1.5.1 研究的目的和意义 4
1.5.2 研究内容 4
2 实验内容与方法 5
2.1 实验材料 5
2.1.1 矿样 5
2.1.2 菌种 5
2.1.3 萃取剂 5
2.1.4 稀释剂 5
2.1.5 实验试剂 5
2.1.6 实验仪器 6
2.2 实验方法 6