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Occurrence and transport behaviors of perfluoroalkyl acids in drinking water distribution systems
Chen, Ruya; Li, Guiwei; Yu, Ying; Ma, Xu; Zhuang, Yuan; Tao, Hui; Shi, Baoyou
2019-12-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume697Pages:-
AbstractAlthough human exposure to perfluoroalkyl acids (PFAAs) through tap water is an ongoing concern, knowledge of the PFAAs occurrence in the tap water and the associated transport behaviors of PFAAs in drinking water distribution systems (DWDSs) are scarce. This investigation profiled the occurrence of 17 kinds of PFAAs in tap water of some Chinese cities, and the transport behaviors of PFAAs in DWDS were observed in eastern China. Tap water samples both along trunk pipelines and at the distal ends were collected to display the PFAAs occurrence scenarios. Loose deposit solids were also obtained to reveal their possible accumulation effect on PFAAs. The results showed that perfluorooctanoic acid (PFOA) and perfluorobutanoic acid (PFBA) widely existed in tap water samples, and were the predominant PFAAs in eastern China areas. The mean concentration of the 17 PFAAs was 77.49 ng/L (ranging from 9.29 ng/L to 266.68 ng/L). Short-chain PFAAs (mainly PFBA) concentrations were relatively stable from water treatment plant to consumer taps, while long-chain PFAAs (mainly PFOA) exhibited a significant decrease in concentration, which could be attributed to their accumulation by the loose deposits in the DWDSs. It was calculated that PFOA has a higher partition coefficient than PFBA; this means that the former has a stronger potential to be adsorbed by loose deposits. In addition, the accumulation ability of loose deposits might be associated with the composition of Al, Fe and Si in the loose deposits. The positive correlation between the short-chain PFAAs and dissolved organic carbon (DOC) indicated the possible interactions between PFAA and natural organic matter could favor short-chain PFAAs to retain in bulk water. When water quality conditions change or hydraulic disturbance occur, loose deposits may enter tap water bringing accumulated PFAAs with it, which may result in potential health risks. (C) 2019 Elsevier B.V. All rights reserved.
Department中国科学院饮用水科学与技术重点实验室
KeywordPerfluoroalkyl acids Drinking water distribution systems Occurrence Transport behaviors Loose deposits
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43497
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.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.Renmin Univ China, Sch Environm & Nat Resource, Beijing 100872, Peoples R China
Recommended Citation
GB/T 7714
Chen, Ruya,Li, Guiwei,Yu, Ying,et al. Occurrence and transport behaviors of perfluoroalkyl acids in drinking water distribution systems[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,697:-.
APA Chen, Ruya.,Li, Guiwei.,Yu, Ying.,Ma, Xu.,Zhuang, Yuan.,...&Shi, Baoyou.(2019).Occurrence and transport behaviors of perfluoroalkyl acids in drinking water distribution systems.SCIENCE OF THE TOTAL ENVIRONMENT,697,-.
MLA Chen, Ruya,et al."Occurrence and transport behaviors of perfluoroalkyl acids in drinking water distribution systems".SCIENCE OF THE TOTAL ENVIRONMENT 697(2019):-.
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