Cited by 159Per- and polyfluoroalkyl substances researchToxic Organic Pollutants ImpactFluoride Effects and Removal

Risk Assessment of Per- and Polyfluoroalkyl Substance Mixtures: A Relative Potency Factor Approach

Bil, Wieneke, Zeilmaker, Marco, Fragki, Styliani, Lijzen, Johannes, Verbruggen, Eric, Bokkers, Bas·2020·Environmental Toxicology and Chemistry

Abstract

Per- and polyfluoroalkyl substances (PFAS) often occur together as contamination in exposure media such as drinking water or food. The relative potency factor (RPF) methodology facilitates the risk assessment of mixture exposure. A database of liver endpoints was established for 16 PFAS, using data with the same species (rat), sex (male), and exposure route (oral) and comparable exposure duration (42-90 d). Dose-response analysis was applied to derive the relative potencies of 3 perfluoroalkyl sulfonic acids (perfluorobutane sulfonic acid, perfluorohexane sulfonic acid, perfluorooctane sulfonic acid), 8 perfluoroalkyl carboxylic acids (perfluorobutanoic acid, perfluorohexanoic acid, perfluorononanoic acid, perfluoroundecanoic acid, perfluorododecanoic acid, perfluorotetradecanoic acid, perfluorohexadecanoic acid, perfluorooctadecanoic acid), 2 perfluoroalkyl ether carboxylic acids (tetrafluoro-2-[heptafluoropropoxy]propanoic acid, 3H-perfluoro-3-[(3-methoxy-propoxy)propanoic acid]), and 2 fluorotelomer alcohols (6:2 FTOH, 8:2 FTOH) compared to perfluorooctanoic acid (PFOA), based on liver effects. In addition, the RPFs of 7 other perfluoroalkyl acids were estimated based on read-across. This resulted in the relative potencies of 22 PFAS compared to the potency of index compound PFOA. The obtained RPFs can be applied to measured PFAS quantities, resulting in the sum of PFOA equivalents in a mixture. This sum can be compared with an established PFOA concentration limit (e.g., in drinking water or food) or an external health-based guidance value (e.g., tolerable daily intake, acceptable daily intake, or reference dose) to estimate the risk resulting from direct oral exposure to mixtures. Assessing mixture exposure is particularly relevant for PFAS, with omnipresent exposure in our daily lives. Environ Toxicol Chem 2021;40:859-870. © 2020 SETAC.

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Crossref · 10.1002/etc.4835

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  • Recent studies did not modify the limitation of using rodent parameters to establish TEFs that are intended to be used to estimate human health risks related to PFAS mixtures exposure.

    “Recent studies did not modify the limitation of using rodent parameters to establish TEFs that are intended to be used to estimate human health risks related to PFAS mixtures exposure.”
  • A database of rat liver endpoints for 16 PFAS was established, allowing for relative potency factors (RPFs) calculations and risk assessment of mixture exposure.

    “Indeed, a database of rat liver endpoints for 16 PFAS was established, allowing for relative potency factors (RPFs) calculations and risk assessment of mixture exposure [48].”

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Authors
Bil, W., Zeilmaker, M., Fragki, S., Lijzen, J., Verbruggen, E., & Bokkers, B.
Affiliations
National Institute for Public Health and the Environment (NL)
Corresponding author
Bil, Wieneke
Venue
Environmental Toxicology and Chemistry
Published
2020-07-30
Volume
40
Issue
3
Pages
859-870
ISSN
  • 0730-7268 (ISSN-L)
  • 1552-8618
OpenAlex
W3045743391
Cited by
158
References
46
Citations by year
2026: 34 · 2025: 39 · 2024: 28 · 2023: 22 · 2022: 24 · 2021: 11
FWCI
5.28
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Toxicology and Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • Rivm Repository (Netherlands National Institute for Public Health and the Environment) (submittedVersion)
Funders
Municipality of Dordrecht
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Physical Sciences › Environmental Science › Water Science and Technology › Fluoride Effects and Removal
Keywords
per- and polyfluoroalkyl substances, PFAS mixtures, relative potency factors, mixture risk assessment, hepatotoxicity, perfluorooctanoic acid, PFBS, perfluorohexane sulfonic acid, read-across, dose-response analysis, drinking water contamination, food contamination, tolerable daily intake
MeSH terms
Animals, Carboxylic Acids, Fluorocarbons, Male, Sulfonic Acids, Alkanesulfonic Acids, Risk Assessment, Rats, Drinking Water

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