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Human Exposure and Elimination Kinetics of Chlorinated Polyfluoroalkyl Ether Sulfonic Acids (Cl-PFESAs)
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry.
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Number of Authors: 7
2016 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 50, no 5, 2396-2404 p.Article in journal (Refereed) Published
Abstract [en]

The incomplete mass-balance of organic fluorine in human serum indicates the existence of unknown per- and polyfluoroalkyl substances (PFASs) with persistent and bioaccumulative properties. Here we characterized human exposure and elimination kinetics of chlorinated polyfluoroalkyl ether sulfonic acids (Cl-PFESAs) in metal plating workers (n = 19), high fish consumers (n = 45), and background controls (n = 8). Cl-PFESAs were detected in >98% of the sampled individuals with serum concentrations ranging <0.019-5040 ng/mL. Statistically higher median serum levels were observed in high fish consumers (93.7 ng/mL) and metal plating workers (51.5 ng/mL) compared to the background control group (4.78 ng/mL) (Kruskal Wallis rank sum test, p < 0.01). Cl-PFESAs could account for 0.269 to 93.3% of Sigma PFASs in human serum indicating that this compound class may explain a substantial fraction of previously unidentified organic fluorine in the Chinese population. Estimated half-lives for renal clearance (median 280 years; range 7.1-4230 years) and total elimination (median 15.3 years; range 10.1-56.4 years) for the eight carbon Cl-PFESA suggest that this is the most biopersistent PFAS in humans reported to date. The apparent ubiquitous distribution and slow elimination kinetics in humans underscore the need for more research and regulatory actions on Cl-PFESAs and PFAS alternatives with similar chemical structures.

Place, publisher, year, edition, pages
2016. Vol. 50, no 5, 2396-2404 p.
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Environmental Engineering Earth and Related Environmental Sciences
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URN: urn:nbn:se:su:diva-128510DOI: 10.1021/acs.est.5b05849ISI: 000371371700032PubMedID: 26866980OAI: oai:DiVA.org:su-128510DiVA: diva2:917961
Available from: 2016-04-08 Created: 2016-03-30 Last updated: 2016-04-08Bibliographically approved

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Vestergren, Robin
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