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  • 1. Haque, Faiz
    et al.
    Soerensen, Anne L.
    Swedish Museum of Natural History, Department of Environmental research and monitoring.
    Sköld, Martin
    Swedish Museum of Natural History, Department of Environmental research and monitoring.
    Awad, Raed
    Spaan, Kyra M
    Lauria, Mélanie Z
    Plassmann, Merle
    Benskin, Jonathan P.
    Per- and polyfluoroalkyl substances (PFAS) in white-tailed sea eagle eggs from Sweden: Temporal trends (1969-2021), spatial variations, fluorine mass balance, and suspect screening2023In: Environmental Science: Processes & Impacts, ISSN 2050-7887, E-ISSN 2050-7895Article in journal (Refereed)
    Abstract [en]

    Temporal and spatial trends of 15 per- and polyfluoroalkyl substances (PFAS) were determined in white-tailed sea eagle (WTSE) eggs (Haliaeetus albicilla) from two inland and two coastal regions of Sweden between 1969 and 2021. PFAS concentrations generally increased from ∼1969 to ∼1990s–2010 (depending on target and site) and thereafter plateaued or declined, with perfluorooctane sulfonamide (FOSA) and perfluorooctane sulfonate (PFOS) declining faster than most perfluoroalkyl carboxylic acids (PFCAs). The net result was a shift in the PFAS profile from PFOS-dominant in 1969–2010 to an increased prevalence of PFCAs over the last decade. Further, during the entire period higher PFAS concentrations were generally observed in coastal populations, possibly due to differences in diet and/or proximity to more densely populated areas. Fluorine mass balance determination in pooled samples from three of the regions (2019–2021) indicated that target PFAS accounted for the vast majority (i.e. 81–100%) of extractable organic fluorine (EOF). Nevertheless, high resolution mass-spectrometry-based suspect screening identified 55 suspects (31 at a confidence level [CL] of 1–3 and 24 at a CL of 4–5), of which 43 were substances not included in the targeted analysis. Semi-quantification of CL ≤ 2 suspects increased the identified EOF to >90% in coastal samples. In addition to showing the impact of PFAS regulation and phase-out initiatives, this study demonstrates that most extractable organofluorine in WTSE eggs is made up of known (legacy) PFAS, albeit with low levels of novel substances.

  • 2.
    Lauria, Mélanie Z.
    et al.
    Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden.
    Sepman, Helen
    Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden;Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 106 91 Stockholm, Sweden.
    Ledbetter, Thomas
    Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden;Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 106 91 Stockholm, Sweden.
    Plassmann, Merle
    Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden.
    Roos, Anna
    Swedish Museum of Natural History, Department of Environmental research and monitoring.
    Simon, Malene
    Greenland Climate Research Centre, Greenland Institute of Natural Resources, 3900 Nuuk, Greenland.
    Benskin, Jonathan P.
    Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden.
    Kruve, Anneli
    Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden;Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 106 91 Stockholm, Sweden.
    Closing the Organofluorine Mass Balance in Marine Mammals Using Suspect Screening and Machine Learning-Based Quantification2024In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 58, no 5, p. 2458-2467Article in journal (Refereed)
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