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Laboratory and field studies on the fate of 1 3 6 8 tetrachlorodibenzo p dioxin in soil and sediments

Laboratory and field studies on the fate of 1 3 6 8 tetrachlorodibenzo p dioxin in soil and sediments

Journal of Agricultural & Food Chemistry 33(3): 518-523

The fate of 14C-ring-labeled 1,3,6,8-tetrachlorodibenzo-p-dioxin (TCDD) was studied in sandy loam soil under field conditions and in silty-clay pond and lake sediments under laboratory conditions. Dissapation of 1,3,6,8-TCDD from small field plots was relatively rapid with 44% of the applied radioactivity lost after 131 days posttreatment. In sediment, 80% of the radioactivity could still be accounted for as intact chemical after 675 days under static aerobic conditions (10 and 25.degree. C) or after 310 days under a nitrogen or air purge. Transformation of 1,3,6,8-TCDD to degradation products and unextractable radioactivity in soils and sediments was very slow. Unidentified polar products represented a maximum of 2.5% of extractable 14C in field soils and 7.0% in sediments. DDT incubated in sediments under the same conditions had half-lives of > 310 days.

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Accession: 005787416

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DOI: 10.1021/jf00063a045

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