| Title: | "Neutral and ionizable per-and polyfluoroalkyl substances in the urban atmosphere: Occurrence, sources and transport" |
| Author(s): | Wang S; Lin X; Li Q; Liu C; Li Y; Wang X; |
| Address: | "State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China. State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China. Electronic address: xhwang@xmu.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2022.153794 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "In the atmosphere, the photodegradation of neutral per-and polyfluoroalkyl substances (n-PFASs) is a source of ionizable PFASs (i-PFASs). However, they are not frequently simultaneously analyzed to study their transport and sources. In this study, n-PFASs and i-PFASs were simultaneously analyzed in the atmosphere of China, Japan and Malaysia to investigate the occurrence, seasonal variations, sources and transport. Results showed that n-PFASs ranged from 4.8 to 1400 pg m(-3), with an average value of 170 pg m(-3), and 8:2 fluorotelomer alcohol (8:2 FTOH) was the most abundant compound. i-PFASs ranged from 3.7 to 330 pg m(-3), with an average value of 49 pg m(-3), and perfluorobutanoic acid (PFBA) had the highest concentration. Generally, airborne PFASs had a decreasing gradient from cities with high population density toward less industrialized sites. i-PFASs exhibited significantly (P < 0.05) seasonal variations, which were higher in the summer. 8:2 FTOH and 10:2 FTOH had significant (P < 0.05) positive correlations with perfluorooctanoic acid and perfluorodecanoic acid, suggesting that they had same sources, such as co-emission and photodegradation of FTOHs. Urumqi and Selangor were far away from industry, and high percentages (>95%) but low concentrations of PFBA were found in these cities, indicating the long-range atmospheric transport of PFBA due to its high volatility. The Summer Monsoon may promote the transport of high concentrations of PFAS from coastal cities to inland cities" |
| Keywords: | "Alcohols *Alkanesulfonic Acids/analysis Atmosphere China Cities Environmental Monitoring *Fluorocarbons/analysis Japan *Water Pollutants, Chemical/analysis Long-range atmospheric transport Monsoon Pfoa Persistent organic pollutants;" |
| Notes: | "MedlineWang, Siquan Lin, Xiaoping Li, Qin Liu, Chang Li, Yongyu Wang, Xinhong eng Netherlands 2022/02/13 Sci Total Environ. 2022 Jun 1; 823:153794. doi: 10.1016/j.scitotenv.2022.153794. Epub 2022 Feb 9" |
