Accumulation of perfluorooctane sulfonate (PFOS) in the food chain of the Western Scheldt estuary: Comparing field measurements with kinetic modeling

Martine G. de Vos, Mark A.J. Huijbregts, Martine J. van den Heuvel-Greve, A.D. Vethaak, Kristin I. Van de Vijver, Pim E.G. Leonards, S.P.J. van Leeuwen, P. de Voogt, A.J. Hendriks*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

53 Citations (Scopus)

Abstract

The environmentally persistent perfluorooctane sulfonate (PFOS) is a perfluoroalkylated acid (PFA), which has been found to accumulate and biomagnify through food webs all over the world. In the present investigation, the accumulation kinetics of PFOS was explored using the bioaccumulation model OMEGA. As accumulation behavior of PFOS may show similarities to fatty acids as well as to neutral organic compounds, different modeling approaches were used. Accumulation kinetics of PFOS was modeled similar to (1) moderately and (2) highly hydrophobic compounds, (3) metals and (4) as a combination of hydrophobic compounds and metals. Modeled elimination and uptake rate constants were compared to empirical rate constants from literature. Subsequently, model predictions were compared to field-based biota-suspended solids accumulation ratios (BSAF) in the estuarine food chain of the Western Scheldt, The Netherlands. Results show that uptake of PFOS is comparable to moderately hydrophobic compounds and elimination is best described by elimination kinetics of metals. These observations indicate that the accumulation behavior of PFOS is comparable to that of short and medium chained fatty acids.

Original languageEnglish
Pages (from-to)1766-1773
Number of pages8
JournalChemosphere
Volume70
Issue number10
DOIs
Publication statusPublished - Feb 2008
Externally publishedYes

Keywords

  • Bioaccumulation
  • Elimination
  • Kinetics
  • Perfluorinated compounds
  • Surfactants
  • Uptake

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