中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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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