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Perfluoroalkyl Substances in the Western Tropical Atlantic Ocean
Stockholms universitet, Institutionen för miljövetenskap.ORCID iD: 0000-0002-5982-0172
Coordenação de Oceanografia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
Stockholms universitet, Institutionen för miljövetenskap.ORCID iD: 0000-0001-5940-637X
Stockholms universitet, Institutionen för miljövetenskap.ORCID iD: 0000-0002-6194-1491
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Number of Authors: 52021 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 55, no 20, p. 13749-13758Article in journal (Refereed) Published
Abstract [en]

The dispersion of perfluoroalkyl substances (PFAS) in surface and deep-water profiles (down to 5845 m deep) was evaluated through the Western Tropical Atlantic Ocean (TAO) between 15°N and 23°S. The sum concentrations for eight quantifiable PFAS (∑8PFAS) in surface waters ranged from 11 to 69 pg/L, which is lower than previously reported in the same area as well as in higher latitudes. Perfluoroalkyl carboxylic acids (PFCAs) were the predominant PFASs present in the Western TAO. The 16 surface samples showed variable PFAS distributions, with the predominance of perfluorooctanoic acid (PFOA) along the transect (67%; 11 ± 8 pg/L) and detection of perfluoroalkyl sulfonic acids (PFSAs) only in the Southern TAO. Perfluoroheptanoic acid (PFHpA) was often detected in the vertical profiles. PFAS distribution patterns (i.e., profiles and concentrations) varied with depth throughout the TAO latitudinal sectors (North, Equator, South Atlantic, and in the Brazilian coastal zone). Vertical profiles in coastal samples displayed decreasing PFAS concentrations with increasing depth, whereas offshore samples displayed higher PFAS detection frequencies in the intermediate water masses. Together with the surface currents and coastal upwelling, the origin of the water masses was an important factor in explaining PFAS concentrations and profiles in the TAO.

Place, publisher, year, edition, pages
2021. Vol. 55, no 20, p. 13749-13758
Keywords [en]
POPs, PFAAs, Upwelling, GEOTRACES, Tropical Atlantic Ocean
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:liu:diva-191954DOI: 10.1021/acs.est.1c01794ISI: 000710453500035PubMedID: 34617730OAI: oai:DiVA.org:liu-191954DiVA, id: diva2:1739744
Available from: 2023-02-27 Created: 2023-02-27 Last updated: 2025-02-07

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Miranda, Daniele de A.Benskin, Jonathan P.Johansson, Jana

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