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- W2123896268 abstract "Accumulation, distribution and metabolism of ring labelled, 14C-1,1,1,-trichloro-2,2-bis(p-chlorophenyl)ethane (p,p'-DDT) in a model marine aquatic ecosystem consisting of seawater, sediment, oysters (Isognomonon alatus) and Humbug fish (Dascillus aruanus) were studied in the laboratory. 14C-p,p'-DDT distributes rapidly in the ecosystem immediately after application on the water surface with reduction of its concentration in the water phase from 1.18 ng g(-1) to 0.71 ng g(-1) after 2 hours and an increase in its content in the sediment and oysters. The bioconcentration factor reached a maximum of 19 x 10(3) in oysters, and 1657 in Humbug fish after 24 hours. The sediment concentration reached 117 ng g(-1) after 168 hours from start of application. A peak bioconcentration factor of 111 x 10(3) was calculated after 120 hours when 0.24 mg kg(-1) of 14C-p,p'-DDT was maintained through dosing every 24 hours with 0.002 mg kg(-1) of a mixture of labelled and non-labelled pesticide. The rate of depuration of accumulated 14C-p,p'-DDT sediment residues was up to 78.3% after 24 hours while oysters lost only 14.0% during the same period. The loss in Humbug fish was only 22.2% in three days. Volatilisation and sorption losses from seawater alone (without sediment/biota) were found to be very high in the range of 73.8 - 91.5% over 24 h for p,p'-DDT in aerated and nonaerated ecosystem. Gas chromatograph and TLC analysis of water, sediment and oyster samples revealed presence of p,p'-DDT and substantial amounts of p,p'-DDE and p,p'-DDD three days after pesticide dosage." @default.
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- W2123896268 date "2002-11-01" @default.
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- W2123896268 title "Accumulation, Distribution and Metabolism of<sup>14</sup>C- 1,1,1- Trichloro-2, 2-, Bis- (P-Chlorophenyl) Ethane (p,p′-DDT) Residues in a Model Tropical Marine Ecosystem" @default.
- W2123896268 doi "https://doi.org/10.1080/09593332308618327" @default.
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