Degradation of methiocarb by monochloramine in water treatment: Kinetics and pathways
文献类型：期刊论文
| 作者 | Qiang, Zhimin ; Tian, Fang ; Liu, Wenjun ; Liu, Chao |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2014 |
| 卷号 | 50期号:1页码:237-244 |
| 关键词 | Methiocarb Monochloramine Degradation pathways Kinetic modeling Water treatment |
| ISSN号 | 0043-1354 |
| 中文摘要 | The micropollution of drinking water sources with pesticides has become a global concern. This work investigated the degradation of methiocarb (MC), a most commonly-used carbamate pesticide, by monochloramine (NH2Cl) under simulated water treatment conditions. Results indicate that the reaction was of first-order in MC and varied orders in NH2Cl depending on water pH. The observed rate constant of MC degradation decreased quickly with either a decrease in the molar ratio of chlorine to ammonia (Cl-2:N) or an increase in water pH. The apparent activation energy of the reaction was determined to be 34 kJ mol(-1). The MC degradation pathways also exhibited a strong pH dependence: at pH 6.5, MC was first oxidized by NH2Cl to methiocarb sulfoxide (MCX), and then hydrolyzed to methiocarb sulfoxide phenol (MCXP); while at pH 8.5, MCX, MCXP and methiocarb sulfone phenol (MCNP) were formed successively through either oxidation or hydrolysis reactions. Based on the identified byproducts and their concentrations evolution, the proposed pathways of MC degradation in the presence of NH2Cl were further validated through kinetic model simulations. (C) 2013 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000330909600024 |
| 公开日期 | 2015-03-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9518]  |
| 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 | Qiang, Zhimin,Tian, Fang,Liu, Wenjun,et al. Degradation of methiocarb by monochloramine in water treatment: Kinetics and pathways[J]. WATER RESEARCH,2014,50(1):237-244. |
| APA | Qiang, Zhimin,Tian, Fang,Liu, Wenjun,&Liu, Chao.(2014).Degradation of methiocarb by monochloramine in water treatment: Kinetics and pathways.WATER RESEARCH,50(1),237-244. |
| MLA | Qiang, Zhimin,et al."Degradation of methiocarb by monochloramine in water treatment: Kinetics and pathways".WATER RESEARCH 50.1(2014):237-244. |
入库方式： OAI收割
来源：生态环境研究中心
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