Degradation of odorous sulfide compounds by different oxidation processes in drinking water: Performance, reaction kinetics and mechanism
文献类型：期刊论文
| 作者 | Zhang, Junzhi; Liao, Yu; Wang, Qi ; Wang, Chunmiao; Yu, Jianwei
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 189页码:- |
| 关键词 | Sulfides oxidation treatability kinetics transformation pathways mechanisms |
| ISSN号 | 0043-1354 |
| 英文摘要 | Swampy/septic odor caused by various sulfides is one of the most frequently encountered odor problems in drinking water. However, even though it is much more offensive, few studies have specifically focused on swampy/septic odor compared to the extensively studied musty/earthy problems. In this work, four sulfide odorants, diamyl sulfide (DAS), dipropyl sulfide (DPS), dimethyl disulfide (DMDS) and diethyl disulfide (DEDS), were selected to evaluate the treatment performance of different oxidation processes in drinking water. The results demonstrated that DMDS, DEDS, DPS and DAS could be oxidized effectively by KMnO4, NaClO and ClO2 . The oxidation processes could be well described by the second-order kinetic model, in which k values of selected sulfides followed the order DMDS approximate to DEDS << DPS approximate to DAS. As for the three oxidants, the order of reactivity was KMnO4 << ClO2 < NaClO, which was also verified in raw water. The results of oxidation treatability, reaction kinetics and mechanisms confirmed that the characteristics of the central sulfur atom rather than the side chain is the decisive factor in controlling the oxidation rate and transformation pathway of sulfides. The transformation products and pathways were significantly different for the three oxidants. Sulfones (DPSO, DASO) were always formed by cycloaddition reactions during KMnO4 oxidation, yet recombination reactions proceeded during ClO2 oxidation and formed more products, such as MADS, DADS and EADS. Density functional theory (DFT) calculations confirmed that the differences in transformation pathways were caused by the variations in the activity of the oxidants and sulfides. Finally, NaClO was certified as the most effective oxidant for controlling sulfide odorants in drinking water treatment. (C) 2020 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46190]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100019, Peoples R China 3.Beijing Univ Civil Engn & Architecture, Beijing Climate Change Response Res & Educ Ctr, Beijing 100044, Peoples R China 4.1 Zhanlanguan Rd, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Junzhi,Liao, Yu,Wang, Qi,et al. Degradation of odorous sulfide compounds by different oxidation processes in drinking water: Performance, reaction kinetics and mechanism[J]. WATER RESEARCH,2021,189:-. |
| APA | Zhang, Junzhi,Liao, Yu,Wang, Qi,Wang, Chunmiao,&Yu, Jianwei.(2021).Degradation of odorous sulfide compounds by different oxidation processes in drinking water: Performance, reaction kinetics and mechanism.WATER RESEARCH,189,-. |
| MLA | Zhang, Junzhi,et al."Degradation of odorous sulfide compounds by different oxidation processes in drinking water: Performance, reaction kinetics and mechanism".WATER RESEARCH 189(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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