Oxidation of sulfonamide antibiotics by chlorine dioxide in water: Kinetics and reaction pathways
文献类型：期刊论文
| 作者 | Shi, Yanwei; Qiang, Zhimin; Ben, Weiwei; Li, Weiwei; Zhang, Yu |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2017-11-01 |
| 卷号 | 327期号:0页码:743-750 |
| 关键词 | Sulfonamides Chlorine Dioxide Kinetics Reaction Pathways Water Treatment |
| 英文摘要 | Sulfonamides (SAs), commonly used as human and veterinary antibiotics, are of great concerns because of their frequent detections in aquatic environment. This study investigated the oxidation of six SAs (i.e., sulfamethoxazole (SMX), sulfamethizole, sulfamethazine, sulfadimethoxine, sulfamerazine, and sulfathiazole) by chlorine dioxide (ClO2). The results indicate that the reactions followed the second-order kinetic model, with rate constants ranging from 3.85 x 10(3) to 2.59 x 10(4) M-1 s(-1) at pH 7.0 and 20 degrees C. For each SA, the rate constant increased by 1.6-2.2 orders of magnitude as the solution pH increased from 4.0 to 9.5. The activation energies of the selected SAs ranged from 31.6 to 39.8 kJ mol(-1). In addition, SMX was selected as a model compound to explore the degradation pathways during ClO2 oxidation. The reactivity of SMX toward ClO2 was strongly related to the ionization equilibrium of the amido-nitrogen in SMX molecule. The cleavage of SAN and CAS bonds and the hydroxylation of aniline moiety in the SMX molecule constituted the major degradation pathways. ClO2 oxidation was likely to decrease the antibacterial activity of SMX solution because of the destruction of p-aminobenzenesulfonamide moiety. The obtained rate constants could well predict the fate of SAs during ClO2 oxidation in a surface water, where an effective removal of SAs by ClO2 can be expected under practical water treatment conditions. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39538]  |
| 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 | Shi, Yanwei,Qiang, Zhimin,Ben, Weiwei,et al. Oxidation of sulfonamide antibiotics by chlorine dioxide in water: Kinetics and reaction pathways[J]. CHEMICAL ENGINEERING JOURNAL,2017,327(0):743-750. |
| APA | Shi, Yanwei,Qiang, Zhimin,Ben, Weiwei,Li, Weiwei,&Zhang, Yu.(2017).Oxidation of sulfonamide antibiotics by chlorine dioxide in water: Kinetics and reaction pathways.CHEMICAL ENGINEERING JOURNAL,327(0),743-750. |
| MLA | Shi, Yanwei,et al."Oxidation of sulfonamide antibiotics by chlorine dioxide in water: Kinetics and reaction pathways".CHEMICAL ENGINEERING JOURNAL 327.0(2017):743-750. |
入库方式： OAI收割
来源：生态环境研究中心
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