Effect of trichloroacetic acid on iron oxidation: Implications on the control of DBPs and deposits in drinking water
文献类型：期刊论文
| 作者 | Zhuang, Yuan; Shen, Congcong; Gu, Yifan; Chen, Ruya ; Shi, Baoyou
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 189页码:- |
| 关键词 | Drinking water distribution system Iron oxidation Disinfection byproducts Iron particles |
| ISSN号 | 0043-1354 |
| 英文摘要 | In drinking water distribution system (DWDS), disinfection byproducts (DBPs) have a large possibility of participating in iron oxidation by dissolved oxygen (DO), which may induce particle structure transformations and increase unknown risks. In this work, the influence of trichloroacetic acid (TCAA, one of the most typical DBPs) on iron oxidation processes was studied, and the potential effects of the resulting alpha-FeOOH particles were evaluated through two aspects: (i) influence on the bacterial community and (ii) toxicity to human cells. TCAA promoted iron oxidation process through an Fe-O-C linkage, which led to a sharper surface of the particles (TCAA-mediated Fe oxide particles, TFOP) than that without TCAA (Fe oxide particles, FOP). Interestingly, the influence of particles on the richness of bacterial community of drinking water was different under anaerobic and aerobic conditions: under anaerobic conditions, the richness of bacterial community increased with the addition of particles, while under aerobic conditions, the richness of bacterial community decreased. The higher affinity of TFOP for electron-accepting DO than FOP indicated the role of DO on TFOP under aerobic conditions. TFOP exhibited the strongest cytotoxicity among FOP and the actual deposits. DFT calculations confirmed that TCAA in iron particles promoted the adsorption and dissociation of H2O2 to generate more center dot OH with an obvious decrease in the energy barrier from 1.51 to 0.80 eV. This study indicates the high potential of adverse effects of DBPs on loose deposits in DWDS and gives implications for the control of DBPs and deposits in drinking water. (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/311016/46195]  |
| 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 100049, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 4.Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhuang, Yuan,Shen, Congcong,Gu, Yifan,et al. Effect of trichloroacetic acid on iron oxidation: Implications on the control of DBPs and deposits in drinking water[J]. WATER RESEARCH,2021,189:-. |
| APA | Zhuang, Yuan,Shen, Congcong,Gu, Yifan,Chen, Ruya,&Shi, Baoyou.(2021).Effect of trichloroacetic acid on iron oxidation: Implications on the control of DBPs and deposits in drinking water.WATER RESEARCH,189,-. |
| MLA | Zhuang, Yuan,et al."Effect of trichloroacetic acid on iron oxidation: Implications on the control of DBPs and deposits in drinking water".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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