Mechanism of Cu(II)-catalyzed monochloramine decomposition in aqueous solution
文献类型：期刊论文
| 作者 | Fu, Jun ; Qu, Jiuhui ; Liu, Ruiping ; Qiang, Zhimin ; Zhao, Xu ; Liu, Huijuan |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2009-06-15 |
| 卷号 | 407期号:13页码:4105-4109 |
| 关键词 | Catalysis Dichloramine Electron spin resonance (ESR) Radical intermediates Water disinfection |
| 中文摘要 | The decomposition of monochloramine, which is commonly used as a secondary disinfectant at water treatment plants to reduce the formation of disinfection byproducts. always occurs in water and can be accelerated by certain catalytic substances. This work was to investigate the mechanism of monochloramine decomposition catalyzed by Cu(II) in aqueous solution. Ultraviolet (UV) spectral results showed that either Cu(II) addition or pH decrease would significantly promote the transformation of monochloramine to dichloramine. A copper intermediate, Cu(I), was extracted from the NH(2)Cl-Cu(II) solution by solid-phase extraction and identified by X-ray photoelectron spectroscopy (XPS). Electron spin resonance (ESR) results showed that hydroxyl radical (center dot H) and amidogen radical (center dot NH(2)) were generated in the reaction between monochloramine and Cu(II). These radical intermediates also contributed to monochloramine decomposition. Based on the experimental results. the reaction mechanism for Cu(II)-catalyzed monochloramine decomposition was proposed which consisted of two pathways: 1) direct catalysis in which Cu(II) acts as a Lewis acid to accelerate monochloramine decomposition to dichloramine (major pathway); and 2) indirect catalysis in which the active radical intermediates (center dot OH and center dot NH(2)) react with monochloramine and lead to its decomposition (minor pathway). (C) 2009 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000266761500020 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21699]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Fu, Jun,Qu, Jiuhui,Liu, Ruiping,et al. Mechanism of Cu(II)-catalyzed monochloramine decomposition in aqueous solution[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2009,407(13):4105-4109. |
| APA | Fu, Jun,Qu, Jiuhui,Liu, Ruiping,Qiang, Zhimin,Zhao, Xu,&Liu, Huijuan.(2009).Mechanism of Cu(II)-catalyzed monochloramine decomposition in aqueous solution.SCIENCE OF THE TOTAL ENVIRONMENT,407(13),4105-4109. |
| MLA | Fu, Jun,et al."Mechanism of Cu(II)-catalyzed monochloramine decomposition in aqueous solution".SCIENCE OF THE TOTAL ENVIRONMENT 407.13(2009):4105-4109. |
入库方式： OAI收割
来源：生态环境研究中心
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