KMS of Research Center for Eco-Environmental Sciences， CAS
| Deiodination of iopamidol by zero valent iron (ZVI) enhances formation of iodinated disinfection by-products during chloramination | |
Dong, Huiyu; Qiang, Zhimin; Lian, Junfeng; Li, Jin; Yu, Jianwei; Qu, Jiuhui
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| 2018-02-01 | |
| Source Publication | WATER RESEARCH
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| ISSN | 0043-1354 |
| Volume | 129Pages:319-326 |
| Abstract | Iodinated X-ray contrast media (ICM) is considered as one of iodine sources for formation of toxic iodinated disinfection byproducts (I-DBPs) during disinfection. This study investigated transformation of a typical ICM, iopamidol (IPM) by zero valent iron (ZVI) and the effect of transformation on the formation of I-DBPs during chloramination. It was found that the presence of ZVI could deiodinate IPM into I- and the transformation of IPM exhibited a pseudo-first-order kinetics. Acidic circumstance, SO42-, Cl- and monochloramine could promote the transformation of IPM by ZVI, while SiO32- inhibited the transformation of IPM. Moreover, the transformation of IPM by ZVI changed both the formed species and amounts of I-DBPs during chloramination. During the chloramination of IPM-containing water, CHCl2I and iodoacetic acid were the predominant iodinated trihalomethanes (I-THMs) and iodinated haloacetic acids (I-HAAs), respectively in the absence of ZVI, while CHI3 and triiodoacetic acid became the predominant ones with 1.0 g L-1 ZVI. The addition of 5.0 g L-1 ZVI increased I-DBPs formation amounts by 6.0 folds after 72 h and maximum formation of I-DBPs occurred at pH 5.0. Enhanced I-DBPs formation was also observed with various real water sources. Given that ZVI ubiquitously exists in the unlined cast iron distribution pipes, the deiodination of IPM by ZVI during distribution may increase the formation of I-DBPs, which needs receive enough attention. (C) 2017 Elsevier Ltd. All rights reserved. |
| Department | 中国科学院饮用水科学与技术重点实验室 |
| Keyword | Iodinated disinfection by-products Iopamidol ZVI Chloramination |
| Document Type | 期刊论文 |
| Identifier | http://ir.rcees.ac.cn/handle/311016/41339 |
| Collection | 中国科学院饮用水科学与技术重点实验室 |
| Recommended Citation GB/T 7714 | Dong, Huiyu,Qiang, Zhimin,Lian, Junfeng,et al. Deiodination of iopamidol by zero valent iron (ZVI) enhances formation of iodinated disinfection by-products during chloramination[J]. WATER RESEARCH,2018,129:319-326. |
| APA | Dong, Huiyu,Qiang, Zhimin,Lian, Junfeng,Li, Jin,Yu, Jianwei,&Qu, Jiuhui.(2018).Deiodination of iopamidol by zero valent iron (ZVI) enhances formation of iodinated disinfection by-products during chloramination.WATER RESEARCH,129,319-326. |
| MLA | Dong, Huiyu,et al."Deiodination of iopamidol by zero valent iron (ZVI) enhances formation of iodinated disinfection by-products during chloramination".WATER RESEARCH 129(2018):319-326. |
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| Deiodination of iopa（760KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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