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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 5    October 2008

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Selective adsorption of bacteria on sulfide minerals surface
JIA Chun-yun(贾春云), WEI De-zhou(魏德洲), LIU Wen-gang(刘文刚),
HAN Cong(韩 聪), GAO Shu-ling(高淑玲), WANG Yu-juan(王玉娟)

School of Resource and Civil Engineering, Northeastern University, Shenyang 110004, China

Abstract: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.

 

Key words: selective adsorption; surface; bacteria; sulfide minerals; bio-flotation

ISSN 1672-7029
CN 43-1423/U

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