| Autor: |
Zhou J; Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. bjturpin@email.unc.edu., Baumann K, Mead RN, Skrabal SA, Kieber RJ, Avery GB, Shimizu M, DeWitt JC, Sun M, Vance SA, Bodnar W, Zhang Z, Collins LB, Surratt JD, Turpin BJ |
| Jazyk: |
angličtina |
| Zdroj: |
Environmental science. Processes & impacts [Environ Sci Process Impacts] 2021 Apr 01; Vol. 23 (4), pp. 580-587. Date of Electronic Publication: 2021 Mar 16. |
| DOI: |
10.1039/d0em00497a |
| Abstrakt: |
Contamination of drinking water by per- and polyfluoroalkyl substances (PFASs) emitted from manufacturing plants, fire-fighting foams, and urban waste streams has received considerable attention due to concerns over toxicity and environmental persistence; however, PFASs in ambient air remain poorly understood, especially in the United States (US). We measured PFAS concentrations in ambient fine particulate matter (PM 2.5 ) at 5 locations across North Carolina over a 1 year period in 2019. Thirty-four PFASs, including perfluoroalkyl carboxylic, perfluoroalkane sulfonic, perfluoroalkyl ether carboxylic and sulfonic acids were analyzed by UHPLC/ESI-MS/MS. Quarterly averaged concentrations ranged from <0.004-14.1 pg m -3 . Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) ranged from <0.18 to 14.1 pg m -3 , comparable to previous PM 2.5 measurements from Canada and Europe (<0.02-3.5 pg m -3 ). Concentrations above 1 pg m -3 were observed in July-September at Charlotte (14.1 pg m -3 , PFOA), Wilmington (4.75 pg m -3 , PFOS), and Research Triangle Park (1.37 pg m -3 , PFOS). Notably, PM 2.5 has a short atmospheric lifetime (<2 weeks), and thus, the presence of PFOS in these samples raises questions about their sources, since PFOS production was phased out in the US ∼20 years ago. This is the first US study to provide insights into ambient PFAS concentrations in PM 2.5 . |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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