Laboratory-Derived Bioaccumulation Kinetic Parameters for Four Per- and Polyfluoroalkyl Substances in Freshwater Mussels.

Autor: Steevens JA; Columbia Environmental Research Center, US Geological Survey, Columbia, Missouri, USA., Dorman R; Columbia Environmental Research Center, US Geological Survey, Columbia, Missouri, USA., Brunson E; Columbia Environmental Research Center, US Geological Survey, Columbia, Missouri, USA., Kunz J; Columbia Environmental Research Center, US Geological Survey, Columbia, Missouri, USA., Pulster EL; Columbia Environmental Research Center, US Geological Survey, Columbia, Missouri, USA., Burket SR; Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, Texas, USA., Stroski KM; Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, Texas, USA., Sims JL; Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, Texas, USA., Simcik MF; Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA., Brooks BW; Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, Texas, USA.
Jazyk: angličtina
Zdroj: Environmental toxicology and chemistry [Environ Toxicol Chem] 2023 Jun; Vol. 42 (6), pp. 1190-1198. Date of Electronic Publication: 2023 May 03.
DOI: 10.1002/etc.5606
Abstrakt: Although freshwater mussels are imperiled and identified as key conservation priorities, limited bioaccumulation information is available on these organisms for contaminants of emerging concern. In the present study we investigated the bioaccumulation of per- and polyfluoroalkyl substances (PFAS) in the model freshwater pond mussel Sagittunio subrostratus because mussels provide important ecosystem services and are important components of aquatic systems where PFAS occur. In the present study we selected four representative perfluorinated carboxylic acids and sulfonic acids, then determined the bioaccumulation kinetics of freshwater mussels in a controlled laboratory study. Because uptake (k u ) and elimination (k e ) rate constants and time to steady state are important parameters for food web bioaccumulation models, we derived bioaccumulation kinetic parameters following exposure to perfluorohexane sulfonic acid (PFHxS), perfluorooctane sulfonic acid (PFOS), and perfluorodecanoic acid (PFDA) at 10 µg/L and perfluoroundecanoic acid (PFUnDA) at 1 µg/L during a 14-day uptake period followed by a 7-day elimination period. Kinetic and ratio-based bioaccumulation factors (BAFs) were subsequently calculated, for example ratio-based BAFs for mussel at day 7 were determined for PFHxS (0.24 ± 0.08 L/kg), PFOS (7.73 ± 1.23 L/kg), PFDA (4.80 ± 1.21 L/kg), and PFUnDA (84.0 ± 14.4 L/kg). We generally observed that, for these four model PFAS, freshwater mussels have relatively low BAF values compared with other aquatic invertebrates and fish. Environ Toxicol Chem 2023;42:1190-1198. © 2023 SETAC. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
(© 2023 SETAC. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.)
Databáze: MEDLINE
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