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题名: Occurrence and profiling of multiple nitrosamines in source water and drinking water of China
作者: Wang, Wanfeng; Yu, Jianwei; An, Wei; Yang, Min
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
出版日期: 2016-05-01
卷号: 551, 期号:0, 页码:489-495
关键词: Nitrosamines ; Drinking water ; Chlorination ; Chloramination ; Formation potential ; Cancer risk
DOI: 10.1016/j.scitotenv.2016.01.175
部门归属: 中国科学院饮用水科学与技术重点实验室
英文摘要: The occurrence of multiple nitrosamines was investigated in 54 drinking water treatment plants (n-DWTPs) from 30 cities across major watersheds of China, and the formation potential (n-FP) and cancer risk of the dominant nitrosamines were studied for profiling purposes. The results showed that N-nitrosodimethylamine (n-NDMA), N-nitrosodiethylamine (n-NDEA) and N-nitrosodi-n-butylamine (n-NDBA) were the most abundant in DWTPs, and the concentrations in source water and finished water samples were not detected (n-ND) -53.6 ng/L (n-NDMA), ND -68.5 ng/L (n-NDEA), ND -48.2 ng/L (n-NDBA). The frequencies of detection in source waters were 64.8%, 61.1% and 51.8%, and 57.4%, 53.7%, and 37% for finished waters, respectively. Further study indicated that the FPs of the three main nitrosamines during chloramination were higher than those during chlorination and in drinking water. The results of Principal Components Analysis (n-PCA) showed that ammonia was themost closely associated factor in nitrosamine formation in the investigated source water; however, there was no significant correlation between nitrosamine-FPs and the values of dominant water-quality parameters. The advanced treatment units (n-i. e., ozonation and biological activated carbon) used in DWTPs were able to control the nitrosamine-FPs effectively after disinfection. The target pollutants posed median and maximum cancer risks of 2.99 x 10(-5) and 35.5 x 10(-5) to the local populations due to their occurrence in drinking water. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36201
Appears in Collections:中国科学院饮用水科学与技术重点实验室_期刊论文

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