Selective adsorption of bacteria on sulfide minerals surface

• Published in: Transactions of Nonferrous Metals Society of China Vol. 18; no. 5; pp. 1247 - 1252
• Main Author: 贾春云 魏德洲 刘文刚 韩聪 高淑玲 王玉娟
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2008; School of Resource and Civil Engineering, Northeastern University, Shenyang 110004, China
• Subjects: bacteria; bio-flotation; selective adsorption; sulfide minerals; surface; 生物浮选; 矿物表面; 硫化物; 选择性吸附; selective adsorption; bio-flotation; surface; bacteria; sulfide minerals
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(08)60211-3

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.