Kinetics and mechanism for degradation of dichlorvos by permanganate in drinking water treatment
文献类型：期刊论文
| 作者 | Chao Liua, Zhimin Qianga,*, Craig Adamsb, Fang Tiana, Tao Zhanga |
| 刊名 | water research
 |
| 出版日期 | 2009 |
| 卷号 | 43期号:1页码:3435-3442 |
| 中文摘要 | The degradation kinetics and mechanism of dichlorvos by permanganate during drinking water treatment were investigated. The reaction of dichlorvos with permanganate was of second-order overall with negligible pH dependence and an activation energy of 29.5 kJ$mol 1. At pH 7.0 and 25 C, the rate constant was 25.2 0.4 M 1 s 1. Dichlorvos was first degraded to trimethyl phosphate (TMP) and dimethyl phosphate (DMP) simultaneously which approximately accounted for <5% and 95% with respect to phosphorus mass,respectively. Further oxidation of DMP generated a final byproduct, monomethyl phosphate (MMP). MMP was for the first time identified as a major byproduct in chemical oxidation of dichlorvos. The kinetic model based on degradation mechanism and determined reaction rate constants allowed us to predict the evolution of dichlorvos and its byproduct concentrations during permanganate pre-oxidation process at water treatment plants. These results suggest that even though the dichlorvos concentration in surface water complies with the surface water quality standards of China (50 mg L 1), its concentration after conventional water treatment will most probably exceed the drinking water quality standards (1 mg L 1). Moreover, luminescent bacteria test shows that the acute toxicity of dichlorvos solution evidently increased after permanganate oxidation. |
| WOS记录号 | WOS:000268993700010 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21814]  |
| 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 | Chao Liua, Zhimin Qianga,*, Craig Adamsb, Fang Tiana, Tao Zhanga. Kinetics and mechanism for degradation of dichlorvos by permanganate in drinking water treatment[J]. water research,2009,43(1):3435-3442. |
| APA | Chao Liua, Zhimin Qianga,*, Craig Adamsb, Fang Tiana, Tao Zhanga.(2009).Kinetics and mechanism for degradation of dichlorvos by permanganate in drinking water treatment.water research,43(1),3435-3442. |
| MLA | Chao Liua, Zhimin Qianga,*, Craig Adamsb, Fang Tiana, Tao Zhanga."Kinetics and mechanism for degradation of dichlorvos by permanganate in drinking water treatment".water research 43.1(2009):3435-3442. |
入库方式： OAI收割
来源：生态环境研究中心
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