Bioavailable DDT residues in sediments

Laboratory assessment of ageing effects using semi-permeable membrane devices

Phanchai Menchai, Lukas Van Zwieten*, Stephen Kimber, Nazir Ahmad, P. Suresh C Rao, Grant Hose

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We describe the reduction in bioavailability of DDT in contaminated soil after it was incubated as sediment for 365 d. Bioavailability was assessed using semi-permeable membranes. Contaminated soils from three cattle dip sites, one spiked paired uncontaminated site, and one spiked OECD standard soil were studied. Sandy soil with residues of 1880 mg/kg ∑DDT incurred since 1962, initially had 4.6% of ∑DDT available, reducing to 0.6% following 365 d. Clay soil (1108 mg ∑DDT/kg) had 4.1% initially available, reducing to 0.3% after 365 d. Freshly spiked soils had a greater amount of DDT initially available (10.9%), but this reduced to 1.5% by the end of the incubation. Of the DDT congeners, both o,p′-DDD and p,p′-DDD were most bioavailable in the soils, but also had the most significant decrease following incubation. Crown

Original languageEnglish
Pages (from-to)110-118
Number of pages9
JournalEnvironmental Pollution
Volume153
Issue number1
DOIs
Publication statusPublished - May 2008
Externally publishedYes

Keywords

  • Bioavailability
  • Contaminated soil
  • DDT
  • Risk assessment
  • Semi-permeable membrane devices

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