Pesticide Science · 1986 · 15 citations · 4 references
EngineeringSoil Organic MatterCarbonyl GroupChemistrySoil TreatmentSoil BiochemistryEnvironmental ChemistrySoil PollutionToxicologyEnvironmental MicrobiologyChief MetabolitesPersistent Organic PollutantSoil ContaminationEcotoxicologyEnvironmental FateChemical PollutionBound ResiduesPart IiEnvironmental EngineeringSoil Chemistry
Abstract The fate of 4‐chlorophenylurea in soils was studied with two preparations: one labelled with 14 C in the phenyl ring and the other in the carbonyl group. The initial dose of 1 mg kg −1 decreased to 50% in about 5 weeks in aerobic sandy clay and in about 16 weeks in anaerobic hydrosoil. Soil treatment with each of the preparations resulted in the release of [ 14 C]carbon dioxide, pointing to decarbonylation and ring opening. The fraction of non‐extractable (soil‐bound) radioactivity increased during incubation. Quantities of ring‐ 14 C‐labelled and carbonyl‐ 14 C‐labelled bound residues differed strongly in the aerobic soil but only slightly in the anaerobic hydrosoil. It is assumed that two sorts of bound residues are formed from 4‐chlorophenylurea: one is fairly stable and might consist of bound 4‐chloroaniline or its transformation products, whereas the other is presumed to be a degradable derivative of 4‐chlorophenylurea.
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