| Title: | [Occurrence and Spatial Distribution of Volatile Organic Compounds in Urban Drinking Water Distribution Systems] |
| Author(s): | Xu MJ; Wang HL; Li CM; Xu X; Wang DH; |
| Address: | "Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China" |
| DOI: | 10.13227/j.hjkx.201703155 |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) in the urban drinking water distribution systems for two coastal cities (S City and L City) in China were analyzed. Health risk assessments of VOCs detected in tap water were performed, and the distribution characteristics of VOCs in the tap water pipe network were also investigated. Among 47 target VOCs, 16 compounds were detected, of which 11 were detected in both S City and L City. Halogenated hydrocarbons were the most commonly detected VOCs, with trihalomethanes (including bromodichloromethane, dibromochloromethane, and bromoform) having the highest detection frequencies (92%-100%). With the exception of bromodichloromethane and dibromochloromethane, the maximum concentrations of detected VOCs in both cities complied with the relevant limits regulated by the standards for drinking water quality (GB 5749-2006). For bromodichloromethane and dibromochloromethane, not only did their concentrations exceed the standard limits of GB 5749-2006 (60 mug.L(-1) for bromodichloromethane and 100 mug.L(-1) for dibromochloromethane), but their lifetime cancer risks (LCR) were estimated at unacceptable levels (>10(-4)). Therefore, these two compounds should be given sufficient attention or be classified as priority control pollutants in municipal water supply networks. In addition, the spatial distribution of eight VOCs with high detection frequencies (>90%) in the tap water pipe network of S City was investigated. The concentrations of VOCs (excluding toluene) in this urban drinking water distribution system gradually decreased with increasing distance from the drinking water treatment plant" |
| Keywords: | "China *Drinking Water Environmental Monitoring Volatile Organic Compounds/*analysis Water Pollutants, Chemical/*analysis *Water Supply coastal city health risk assessment spatial distribution characteristics tap water pipe network volatile organic compoun;" |
| Notes: | "MedlineXu, Mei-Jia Wang, Hai-Liang Li, Chun-Mei Xu, Xiong Wang, Dong-Hong chi China 2018/07/03 Huan Jing Ke Xue. 2018 Feb 8; 39(2):655-662. doi: 10.13227/j.hjkx.201703155" |
