摘要细菌在矿质表面的吸附是生物浸矿的关键环节。本文从生物冶金工艺循环特征出发，探究夹带和溶解于萃余液中的萃取有机物对细菌的吸附行为的影响，结果表明，A.ferrooxidians菌刚开始吸附时吸附速率很快，4分钟之后逐渐下降，8分钟后基本达到吸附平衡。此外,细菌在吸附平衡时的吸附率随培养基夹带有机相中lix98N浓度的升高而上升，纯培养基pH最低为48%，夹带壬基酚最大，为69%；通过对吸附动力学方程的分析表明A.ferrooxidians菌在在黄铜矿表面的吸附属于二级吸附动力模式。pH对吸附的影响明显,在pH=2.出现一个小峰值，ph=2.5之后随着pH的上升而上升，。A.ferrooxidans菌在侵出黄铜矿的过程中溶液pH的变化规律是先急剧上升，后逐渐下降，最后稳定在pH=2.1附近，与初始值pH=2相近。此外，随着培养液中夹带有机相中lix98N浓度的升高，pH达到稳定的时间略延长。氧化还原电位的变化规律与pH的变化规律相铜，在第三天达到峰值，最后稳定在460mv附近。24182
毕业论文关键词：生物冶金，黄铜矿，A.ferrooxidans菌，萃余液夹带，吸附
Effect of organic compounds of copper extraction on the adsorption behavior of A.ferrooxidians bacteria
Abstract
Bacterial adsorption in mineral surface is a key link of bioleaching . This topic research is about copper extraction agent , diluent and improver to A.ferrooxidans bacterial in the surface of chalcopyrite on adsorption speed, adsorption capacity and adsorption state .the results showed that in the beginning,the bacterial adsorption rate is very fast , then decreased gradually, After 8 minutes, basically reached the adsorption equilibrium. In addition ,adsorption rate of bateria in the adsorption equilibrium rise with concentration of culture medium with organic phase lix98N .PH have an great influence on the adsorption , in a certain range, bacterial adsorption capacity rise with PH increase. The law of chang of pH,or redox potential after bioleaching are similar,rising sharply at first,then decreasing gradually, and stabilized at last.Besides , with the increase of medium, placing lix98N concentration in organic phase, the rule will gradually lag.
Keyword:biological metallurgy, chalcopyrite，extraction liquid, A.ferrooxidans，absorption
目录
1.绪论 1
1.1 浸矿细菌的种类及其特性 1
1.1.1 嗜酸氧化亚铁硫杆菌 1
1.2.2 嗜酸氧化硫硫杆菌 1
1.2 细菌在矿质表面的吸附机理 2
1.3 影响细菌吸附的因素 3
1.3.1疏水性 3
1.3.2静电力 3
1.3.3氢键 3
1.3.4环境因素 3
1.3.5细胞表面性质 4
1.3.6 矿质表面性质 4
1.4.浸矿细菌的浸出机理 5
1.5 影响细菌浸矿的因素 6
1.5.1细菌活性 6
1.5.2矿质表面性质 6
1.5.3浸矿环境 7
1.6 研究目的和意义 8
2 实验部分 8
2.1 实验原料 9
2.2 仪器设备 9
2.3 实验方案和方法 10
2.3.1 夹带有机相对A.f菌在矿石表面吸附的影响 10
2.3.2 夹带有机相对A.f菌浸矿过程的影响 12
3 实验结果及分析 12
3.1夹带有机相对A.f菌浸矿过程的影响 12
3.1.1夹带有机相中lix98N浓度对A.f菌在矿石表面吸附行为影响 12
3.1.2 培养基pH对A.f菌在矿石表面吸附的影响（夹带纯煤油为例） 14 铜萃取有机物对A.ferrooxidians菌吸附行为的影响:http://www.youerw.com/shengwu/lunwen_17571.html