A North American and global survey of perfluoroalkyl substances in surface soils: Distribution patterns and mode of occurrence
Rankin, K; Mabury, SA; Jenkins, TM; Washington, JW
HERO ID
3859509
Reference Type
Journal Article
Year
2016
Language
English
PMID
| HERO ID | 3859509 |
|---|---|
| In Press | No |
| Year | 2016 |
| Title | A North American and global survey of perfluoroalkyl substances in surface soils: Distribution patterns and mode of occurrence |
| Authors | Rankin, K; Mabury, SA; Jenkins, TM; Washington, JW |
| Journal | Chemosphere |
| Volume | 161 |
| Page Numbers | 333-341 |
| Abstract | The distribution of 32 per/polyfluoroalkyl substances (PFASs) in surface soils was determined at 62 locations representing all continents (North America n = 33, Europe n = 10, Asia n = 6, Africa n = 5, Australia n = 4, South America n = 3 and Antarctica n = 1) using ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) systems. Quantifiable levels of perfluoroalkyl carboxylates (PFCAs: PFHxA-PFTeDA) were observed in all samples with total concentrations ranging from 29 to 14,300 pg/g (dry weight), while perfluoroalkane sulfonates (PFSAs: PFHxS, PFOS and PFDS) were detected in all samples but one, ranging from <LOQ-3270 pg/g, confirming the global distribution of PFASs in terrestrial settings. The geometric mean PFCA and PFSA concentrations were observed to be higher in the northern hemisphere (930 and 170 pg/g) compared to the southern hemisphere (190 and 33 pg/g). Perfluorooctanoate (PFOA) and perfluorooctanesulfonate (PFOS) were the most commonly detected analytes at concentrations up to 2670 and 3100 pg/g, respectively. The sum of PFCA homologues of PFOA commonly were roughly twice the concentration of PFOA. The PFCA and PFSA congener profiles were similar amongst most locations, with a few principal-component statistical anomalies suggesting impact from nearby urban and point sources. The ratio of even to odd PFCAs was consistent with the atmospheric oxidation of fluorotelomer-based precursors previously observed in laboratory and environmental studies. Given the soils were collected from locations absent of direct human activity, these results suggest that the atmospheric long-range transport (LRT) of neutral PFASs followed by oxidation and deposition are a significant source of PFCAs and PFSAs to soils. |
| Doi | 10.1016/j.chemosphere.2016.06.109 |
| Pmid | 27441993 |
| Wosid | WOS:000382409200040 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Scopus URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978786406&doi=10.1016%2fj.chemosphere.2016.06.109&partnerID=40&md5=d31dc1f72b330b6e660ad70d4d8dbced |
| Is Public | Yes |
| Language Text | English |
| Keyword | PFOA; PFOS; PFASs; Background soils; Reconnaissance survey |
| Relationship(s) |
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