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Fluorine Mass Balance and Suspect Screening in Marine Mammals from the Northern Hemisphere

preprint
submitted on 01.11.2019, 15:50 and posted on 07.11.2019, 22:15 by Kyra Spaan, Carmen van Noordenburg, Merle Plassmann, Lara Schultes, Susan D. Shaw, Michelle Berger, Mads Peter Heide-Jørgensen, Aqqalu Rosing-Asvid, Sandra Granquist, Rune Dietz, Christian Sonne, Frank Rigét, Anna Roos, Jonathan Benskin
There is increasing evidence that the ~20 routinely monitored per- and polyfluoroalkyl substances (PFASs) account for only a fraction of extractable organofluorine (EOF) occurring in the environment. To assess whether PFAS exposure is being underestimated in marine mammals from the Northern Hemisphere, we performed a fluorine mass balance on liver tissues from 11 different species using a combination of targeted PFAS analysis, EOF and total fluorine determination, and suspect screening. Samples were obtained from the east coast United States (US), west and east coast of Greenland, Iceland, and Sweden from 2000-2017. Of the 36 target PFASs, perfluorooctane sulfonate (PFOS) dominated in all but one Icelandic and three US samples, where the 7:3 fluorotelomer carboxylic acid (7:3 FTCA) was prevalent. This is the first report of 7:3 FTCA in polar bears (~1000 ng/g, ww) and cetaceans (<6-190 ng/g, ww). In 18 out of 25 samples, EOF was not significantly greater than fluorine concentrations derived from sum target PFASs. For the remaining 7 samples (mostly from the US east coast), 30-75% of the EOF was unidentified. Suspect screening revealed an additional 33 PFASs (not included in the targeted analysis) bringing the total to 59 detected PFASs from 12 different classes. Overall, these results highlight the importance of a multi-platform approach for accurately characterizing PFAS exposure in marine mammals.

Funding

The Danish Cooperation for Environment in the Arctic (DANCEA) is acknowledged for financial support and local subsistence hunters are for collection of East Greenland samples, respectively. BONUS BALTHEALTH that has received funding from BONUS (Art. 185), funded jointly by the EU, Innovation Fund Denmark (grants 6180-00001B and 6180-00002B), Forschungszentrum Jülich GmbH, German Federal Ministry of Education and Research (grant FKZ 03F0767A), Academy of Finland (grant 311966) and Swedish Foundation for Strategic Environmental Research (MISTRA) is acknowledged for support for the Baltic sampling and support for the work of BONUS BALTHEALTH collaborators engaged in the present study

History

Email Address of Submitting Author

Jon.Benskin@aces.su.se

Institution

Stockholm University

Country

Sweden

ORCID For Submitting Author

0000-0001-5940-637X

Declaration of Conflict of Interest

None.

Exports