Selective adsorption of bacteria on sulfide minerals surface  

作　　者：贾春云 魏德洲 刘文刚 韩聪 高淑玲 王玉娟 

机构地区：[1]School of Resource and Civil Engineering,Northeastern University

出　　处：《中国有色金属学会会刊：英文版》2008年第5期1247-1252,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(50174014) supported by the National Natural Science Foundation of China;Project(2006223002) supported by the High-Tech Program of Liaoning Province, China

摘　　要：The adsorption of bacteria on sulfide minerals surface was studied,and the selective adsorption mechanism of cells on the sulfide minerals was investigated by means of FTIR,UVS and XPS.The results show that the three strains of bacteria adsorbed more preferentially on pyrite than on other two sulfide minerals surface at neutral and alkaline pH conditions.FTIR and UVS of three strains of bacteria indicate that there are more functional groups on their surface,such as O-H,C=O,N-H,C-O,and the content of saccharide is more than that of protein.The state of every element on sulfide minerals surface was analyzed by XPS.The empty orbital number of electronic shell of metal ions on minerals surface is important in selective adsorption process,and some stable constants of metal coordinates can be used to explain the contribution of some groups in saccharide of cell wall to the selective adsorption.The adsorption of bacteria on sulfide minerals surface was studied, and the selective adsorption mechanism of cells on the sulfide minerals was investigated by means of FTIR, UVS and XPS. The results show that the three strains of bacteria adsorbed more preferentially on pyrite than on other two sulfide minerals surface at neutral and alkaline pH conditions. FTIR and UVS of three strains of bacteria indicate that there are more functional groups on their surface, such as O---H, C=O, N--H, C--43, and the content of saccharide is more than that of protein. The state of every element on sulfide minerals surface was analyzed by XPS. The empty orbital number of electronic shell of metal ions on minerals surface is important in selective adsorption process, and some stable constants of metal coordinates can be used to explain the contribution of some groups in saccharide of cell wall to the selective adsorption.

关 键 词：选择性吸附 硫化物 矿物表面 生物浮选 

分 类 号：TF18[冶金工程—冶金物理化学]