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 journalArticlepeer-review

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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