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<p>The degree to which per- and polyfluorinated alkyl substances (PFAS) can be accumulated within and transferred between trophic levels in terrestrial food webs remains unclear, as do the factors that control bioavailability/transferability. Here, we examine the uptake and elimination of seven key PFAS (PFBS, PFHxS, PFOS, PFOA, PFHxA, PFHpA and PFDA), including both carboxylic and sulfonic acids of varying chain lengths, at 0.1 and 1&#xa0;mg&#xa0;kg<sup>−1</sup> in <i>Eisenia fetida</i> (earthworm). Tissue concentrations at all time points were largely below detection for PFHxA and PFHpA. Bioaccumulation factors (BAFs) for the other five PFAS were all &gt; 1 for both the 0.1 and 1&#xa0;mg&#xa0;kg<sup>−1</sup> treatments. Higher BAFs were measured in the 0.1&#xa0;mg&#xa0;kg<sup>−1</sup> treatment, with mean BAFs of 62.4, 37.0, 14.9, 17.3 and 3.7 being determined for PFHxS, PFOS, PFBS, PFDA and PFOA, respectively. BAFs were significantly higher for sulfonic acids and positively correlated with carbon chain length.</p>

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Uptake and Elimination of 7 Selected PFAS in Eisenia Fetida Exposed in Artificial Soil

  • 期刊论文

  • 发表日期：

    2026年4月18日

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  • Jonathan D. Judy,
  • Caleb Gravesen,
  • P. Christopher Wilson,
  • Ann Wilkie,
  • Jennifer Sarchapone,
  • Francisca Hinz,
  • Xinya Yang,
  • Nevaeh Renwick

摘要

The degree to which per- and polyfluorinated alkyl substances (PFAS) can be accumulated within and transferred between trophic levels in terrestrial food webs remains unclear, as do the factors that control bioavailability/transferability. Here, we examine the uptake and elimination of seven key PFAS (PFBS, PFHxS, PFOS, PFOA, PFHxA, PFHpA and PFDA), including both carboxylic and sulfonic acids of varying chain lengths, at 0.1 and 1 mg kg−1 in Eisenia fetida (earthworm). Tissue concentrations at all time points were largely below detection for PFHxA and PFHpA. Bioaccumulation factors (BAFs) for the other five PFAS were all > 1 for both the 0.1 and 1 mg kg−1 treatments. Higher BAFs were measured in the 0.1 mg kg−1 treatment, with mean BAFs of 62.4, 37.0, 14.9, 17.3 and 3.7 being determined for PFHxS, PFOS, PFBS, PFDA and PFOA, respectively. BAFs were significantly higher for sulfonic acids and positively correlated with carbon chain length.