title: Occurrence of regulated and emerging iodinated DBPs in the Shanghai drinking water.
abstract: Drinking water chlorination plays a pivotal role in preventing pathogen contamination against water-borne disease. However, chemical disinfection leads to the formation of halogenated disinfection by products (DBPs). Many DBPs are highly toxic and are of health concern. In this study, we conducted a comprehensive measurements of DBPs, including iodoacetic acid (IAA), iodoform (IF), nine haloacetic acids and four trihalomethanes in drinking waters from 13 water plants in Shanghai, China. The results suggested that IAA and IF were found in all the water treatment plants, with maximum levels of 1.66 µg/L and 1.25 µg/L for IAA and IF, respectively. Owing to deterioration of water quality, the Huangpu River has higher IAA and IF than the Yangtze River. Our results also demonstrated that low pH, high natural organic matter, ammonia nitrogen, and iodide in source waters increased IAA and IF formation. Compared to chlorine, chloramines resulted in higher concentration of iodinated DBP, but reduced the levels of trihalomethanes. This is the first study to reveal the widespread occurrence of IAA and IF in drinking water in China. The data provide a better understanding on the formation of iodinated disinfection byproducts and the findings should be useful for treatment process improvement and disinfection byproducts controls.
authors.affiliation: Key Laboratory of the Public Health Safety, Ministry of Education, Department of Environmental Health, School of Public Health, Fudan University, Shanghai, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Wei
authors.forename: Xin
authors.initials: X
authors.lastname: Chen
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Weiwei
authors.initials: W
authors.lastname: Zheng
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Dajun
authors.initials: D
authors.lastname: Tian
authors.forename: Songhui
authors.initials: S
authors.lastname: Jiang
authors.forename: Choon Nam
authors.initials: CN
authors.lastname: Ong
authors.forename: Gengsheng
authors.initials: G
authors.lastname: He
authors.forename: Weidong
authors.initials: W
authors.lastname: Qu
mesh_terms: D002681:China; D002947:Cities / Q000706:statistics & numerical data*; D004203:Disinfection; D060766:Drinking Water / Q000737:chemistry*; D054879:Halogenation; D012926:Social Control, Formal; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D060753:Water Quality; D014881:Water Supply / Q000331:legislation & jurisprudence / Q000706:statistics & numerical data
chemical_list: D060766:Drinking Water; D014874:Water Pollutants, Chemical
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