Efficient disinfection of Escherichia coli in water by silver loaded alumina
文献类型：期刊论文
| 作者 | Chang, Qingyun ; He, Hong ; Ma, Zichuan |
| 刊名 | JOURNAL OF INORGANIC BIOCHEMISTRY
 |
| 出版日期 | 2008-09 |
| 卷号 | 102期号:9页码:1736-1742 |
| 关键词 | disinfection Ag E. coli ROS catalytic oxidation |
| 英文摘要 | The catalytic inactivation of Escherichia coli (E. coli) in water by silver loaded alumina as catalyst was investigated. Ag/Al2O3 and AgCl/Al2O3 catalysts exhibited high bactericidal activity at room temperature in water with no need for any light or electrical power input. Dissolved oxygen which can be catalyzed to reactive oxygen species (ROS) was found to be essential for the strong bactericidal activities of the catalysts. Decomposition of the cell wall leading to leakage of the intracellular component and the complete lysis of the whole cell were directly observed by transmission electron microscopy (TEM). The resultant change in cell permeability was confirmed by potassium ion leakage. The different morphological changes between E. coli cells treated with the catalysts and Ag+ were also observed. The formation of ROS involved in the bactericidal process by AgCl/Al2O3 was confirmed by addition of catalase and (OH)-O-center dot scavenger. Higher temperature and pH value were found to have positive effect on the bactericidal activity of AgCl/Al2O3. All these results indicated that the bactericidal effect of the catalyst was a synergic action of ROS and Ag+, not an additive one. A possible mechanism is proposed. (C) 2008 Elsevier Inc. All rights reserved. |
| WOS记录号 | WOS:000258637600006 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21888]  |
| 专题 | 生态环境研究中心_大气环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Chang, Qingyun,He, Hong,Ma, Zichuan. Efficient disinfection of Escherichia coli in water by silver loaded alumina[J]. JOURNAL OF INORGANIC BIOCHEMISTRY,2008,102(9):1736-1742. |
| APA | Chang, Qingyun,He, Hong,&Ma, Zichuan.(2008).Efficient disinfection of Escherichia coli in water by silver loaded alumina.JOURNAL OF INORGANIC BIOCHEMISTRY,102(9),1736-1742. |
| MLA | Chang, Qingyun,et al."Efficient disinfection of Escherichia coli in water by silver loaded alumina".JOURNAL OF INORGANIC BIOCHEMISTRY 102.9(2008):1736-1742. |
入库方式： OAI收割
来源：生态环境研究中心
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