Experimental measurements of short-term adsorption of Acidithiobacillus ferrooxidans onto chalcopyrite  

嗜酸氧化亚铁硫杆菌在黄铜矿表面的短期吸附实验研究(英文)

作　　者：王兆慧[1] 谢学辉[1] 柳建设[1,2] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]中南大学资源加工与生物工程学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第2期442-446,共5页中国有色金属学报（英文版）

基　　金：Projects (41073060,21007009,50874032) supported by the National Natural Science Foundation of China;Project (B604) supported by Shanghai Leading Academic Discipline Project,China;Project (10CG34) supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation,China

摘　　要：The influencing factors in adsorption such as adsorption time, pulp concentration, bacterial concentration, pH as well as ionic strength were investigated to explore the relationship among them and bacterial adsorption. The adsorption was a rapid process for bacterial adhesion to chalcopyrite. The extent of adsorption increased with increasing initial bacterial concentration and pulp concentration. The optimal pH for Acidithiobacillusferrooxidans adsorption onto chalcopyrite surfaces was in the range of pH 1-3. The increase of ionic strength led to decrease in bacterial adsorption, which can be well explained by electric double layer theory. The adsorption behavior appeared to be controlled by both hydrophobic and electrostatic interactions at the interface of bacteria and mineral,为了探明细菌在黄铜矿表面的吸附机制,采取短期吸附的实验方法,研究吸附时间、矿浆浓度、细菌浓度、pH值和离子强度等因素对吸附行为的影响。结果表明,细菌吸附量随初始细菌浓度和矿浆浓度的增加而增大。Acidithiobacillus ferrooxidans在黄铜矿表面的最佳吸附pH范围为1-3。离子强度的增大会抑制细菌吸附,这一现象可以通过双电层理论得到很好的解释。细菌与黄铜矿的吸附行为受疏水性和静电作用力共同影响。

关 键 词：bacterial adsorption CHALCOPYRITE ionic strength HYDROPHOBICITY Acidithiobacillusferrooxidans 

分 类 号：X172[环境科学与工程—环境科学]