An uptake and elimination kinetics approach to assess the bioavailability of chromium, copper, and arsenic to earthworms (Eisenia andrei) in contaminated field soils

Johanna Kilpi-Koski, Olli Pekka Penttinen, Ari O. Väisänen, Cornelis A.M. van Gestel

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The aim of this study was to determine the bioavailability of metals in field soils contaminated with chromated copper arsenate (CCA) mixtures. The uptake and elimination kinetics of chromium, copper, and arsenic were assessed in the earthworm Eisenia andrei exposed to soils from a gradient of CCA wood preservative contamination near Hartola, Finland. In soils contaminated with 1480-1590 mg Cr/kg dry soil, 642-791 mg Cu/kg dry soil, and 850-2810 mg Ag/kg dry soil, uptake and elimination kinetics patterns were similar for Cr and Cu. Both metals were rapidly taken up and rapidly excreted by Eisenia andrei with equilibrium reached within 1 day. The metalloid As, however, showed very slow uptake and elimination in the earthworms and body concentrations did not reach equilibrium within 21 days. Bioaccumulation factors (BAF) were low for Cu and Cr (< 0.1), but high for As at 0.54-1.8. The potential risk of CCA exposure for the terrestrial ecosystem therefore is mainly due to As.

Original languageEnglish
Pages (from-to)15095-15104
Number of pages10
JournalEnvironmental science and pollution research international
Volume26
Issue number15
Early online date28 Mar 2019
DOIs
Publication statusPublished - 1 May 2019

Keywords

  • Bioaccumulation
  • Bioavailability
  • CCA-contaminated soil
  • Eisenia andrei
  • Metals and metalloids
  • Uptake and elimination kinetics

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