Effect of soil ageing on in vivo arsenic bioavailability in two dissimilar soils

Albert L. Juhasz, Euan Smith, John Weber, Ravi Naidu, Matthew Rees, Allan Rofe, Tim Kuchel, Lloyd Sansom

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Arsenic (As) bioavailability in spiked soils aged for up to 12 months was assessed using in vitro and in vivo methodologies. Ageing (natural attenuation) of spiked soils resulted in a decline in in vivo As bioavailability (swine assay) of over 75% in soil A (Red Ferrosol) but had no significant effect on in vivo As bioavailability even after 12 months of ageing in soil B (Brown Chromosol). Sequential fractionation, however, indicated that there was repartitioning of As within the soil fractions extracted during the time course investigated. In soil A, the As fraction associated with the more weakly bound soil fractions decreased while the residual fraction increased from 12% to 35%. In contrast, little repartitioning of As was observed in soil B indicating that natural attenuation may be only applicable for As in soils containing specific mineralogical properties.

Original languageEnglish
Pages (from-to)2180-2186
Number of pages7
JournalChemosphere
Volume71
Issue number11
DOIs
Publication statusPublished - 1 May 2008

Keywords

  • Arsenic
  • Bioaccessibility
  • Bioavailability
  • Sequential fractionation
  • Soil ageing

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this