Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis
Although perfluoroalkyl substances (PFASs) are ubiquitous in the Arctic, their dominant pathways to the Arctic remain unclear. Most modeling studies support major oceanic transport for PFASs in the Arctic seawater, but this conclusion contradicts the rapid response of PFASs to global emissions in so...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:a27b612cb6c345fc8d1068b5f54df606 2023-05-15T14:34:13+02:00 Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis Yan Lin Jheng-Jie Jiang Lisa A. Rodenburg Minggang Cai Zhai Wu Hongwei Ke Mahdi Chitsaz 2020-06-01 https://doi.org/10.1016/j.envint.2020.105699 https://doaj.org/article/a27b612cb6c345fc8d1068b5f54df606 en eng Elsevier 0160-4120 doi:10.1016/j.envint.2020.105699 https://doaj.org/article/a27b612cb6c345fc8d1068b5f54df606 undefined Environment International, Vol 139, Iss , Pp - (2020) Perfluoroalkyl substances Western Arctic Sediment Historical variations Pathway Positive matrix factorization envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.1016/j.envint.2020.105699 2023-01-22T19:22:53Z Although perfluoroalkyl substances (PFASs) are ubiquitous in the Arctic, their dominant pathways to the Arctic remain unclear. Most modeling studies support major oceanic transport for PFASs in the Arctic seawater, but this conclusion contradicts the rapid response of PFASs to global emissions in some biota species. Sediments, which act as important PFAS sinks for seawater and potential PFAS source to the benthic food web, are important for interpreting the fate of PFASs in the Arctic. Here we investigate the occurrence of 9 PFASs in one core (1945–2014) and 29 surface sediments from the Bering Sea to the western Arctic. Total PFAS concentrations (0.06–1.73 ng/g dw) in surface sediments were dominated by perfluorooctane sulfonate (PFOS), perfluorononanoic acid (PFNA) and perfluorobutyl sulfonate (PFBS), with higher levels in the Bering Sea slope and the northeast Chukchi Sea. Historical trends in PFASs varied among individuals, with PFOS declining in the early 2000s while PFNA showing an increasing up-core trend. Analysis of positive matrix factorization model identified that the major PFAS sources in the sediment core were dominated by the atmospheric oxidation of consumer use of PFOS precursor-based products (45.0%), while the oceanic transport of fluoropolymer manufacture of polyvinylidene fluoride (mainly PFNA) exhibited an increasing trend over time, becoming dominant in surface sediments (42.8%). Besides, local input of possible aqueous fire-fighting foams (mainly PFOS and PFBS) also acted as an important source currently (30.1%) and historically (34.9%). Our study revealed that the pathways of PFASs in Arctic sediments varied greatly for individuals and the conclusion of PFOS originating from mainly atmospheric oxidation was different from seawater modeling results. This, together with the high possibility of sediments as direct source to Arctic food web (supported by similar PFAS compositions and temporal variations), help provide additional evidence regarding PFAS pathways to the Arctic. Article in Journal/Newspaper Arctic Bering Sea Chukchi Chukchi Sea Unknown Arctic Bering Sea Chukchi Sea Environment International 139 105699 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Perfluoroalkyl substances Western Arctic Sediment Historical variations Pathway Positive matrix factorization envir geo |
spellingShingle |
Perfluoroalkyl substances Western Arctic Sediment Historical variations Pathway Positive matrix factorization envir geo Yan Lin Jheng-Jie Jiang Lisa A. Rodenburg Minggang Cai Zhai Wu Hongwei Ke Mahdi Chitsaz Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis |
topic_facet |
Perfluoroalkyl substances Western Arctic Sediment Historical variations Pathway Positive matrix factorization envir geo |
description |
Although perfluoroalkyl substances (PFASs) are ubiquitous in the Arctic, their dominant pathways to the Arctic remain unclear. Most modeling studies support major oceanic transport for PFASs in the Arctic seawater, but this conclusion contradicts the rapid response of PFASs to global emissions in some biota species. Sediments, which act as important PFAS sinks for seawater and potential PFAS source to the benthic food web, are important for interpreting the fate of PFASs in the Arctic. Here we investigate the occurrence of 9 PFASs in one core (1945–2014) and 29 surface sediments from the Bering Sea to the western Arctic. Total PFAS concentrations (0.06–1.73 ng/g dw) in surface sediments were dominated by perfluorooctane sulfonate (PFOS), perfluorononanoic acid (PFNA) and perfluorobutyl sulfonate (PFBS), with higher levels in the Bering Sea slope and the northeast Chukchi Sea. Historical trends in PFASs varied among individuals, with PFOS declining in the early 2000s while PFNA showing an increasing up-core trend. Analysis of positive matrix factorization model identified that the major PFAS sources in the sediment core were dominated by the atmospheric oxidation of consumer use of PFOS precursor-based products (45.0%), while the oceanic transport of fluoropolymer manufacture of polyvinylidene fluoride (mainly PFNA) exhibited an increasing trend over time, becoming dominant in surface sediments (42.8%). Besides, local input of possible aqueous fire-fighting foams (mainly PFOS and PFBS) also acted as an important source currently (30.1%) and historically (34.9%). Our study revealed that the pathways of PFASs in Arctic sediments varied greatly for individuals and the conclusion of PFOS originating from mainly atmospheric oxidation was different from seawater modeling results. This, together with the high possibility of sediments as direct source to Arctic food web (supported by similar PFAS compositions and temporal variations), help provide additional evidence regarding PFAS pathways to the Arctic. |
format |
Article in Journal/Newspaper |
author |
Yan Lin Jheng-Jie Jiang Lisa A. Rodenburg Minggang Cai Zhai Wu Hongwei Ke Mahdi Chitsaz |
author_facet |
Yan Lin Jheng-Jie Jiang Lisa A. Rodenburg Minggang Cai Zhai Wu Hongwei Ke Mahdi Chitsaz |
author_sort |
Yan Lin |
title |
Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis |
title_short |
Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis |
title_full |
Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis |
title_fullStr |
Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis |
title_full_unstemmed |
Perfluoroalkyl substances in sediments from the Bering Sea to the western Arctic: Source and pathway analysis |
title_sort |
perfluoroalkyl substances in sediments from the bering sea to the western arctic: source and pathway analysis |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.envint.2020.105699 https://doaj.org/article/a27b612cb6c345fc8d1068b5f54df606 |
geographic |
Arctic Bering Sea Chukchi Sea |
geographic_facet |
Arctic Bering Sea Chukchi Sea |
genre |
Arctic Bering Sea Chukchi Chukchi Sea |
genre_facet |
Arctic Bering Sea Chukchi Chukchi Sea |
op_source |
Environment International, Vol 139, Iss , Pp - (2020) |
op_relation |
0160-4120 doi:10.1016/j.envint.2020.105699 https://doaj.org/article/a27b612cb6c345fc8d1068b5f54df606 |
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undefined |
op_doi |
https://doi.org/10.1016/j.envint.2020.105699 |
container_title |
Environment International |
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139 |
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105699 |
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