The dissipation of 1,3-dichloropropene in ditch bottom sediment and associated aerobic ditch water |
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| Authors: | Denis A Yon Grant A Morrison Alec S McGibbon |
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| Abstract: | The aerobic aquatic metabolism of 14C]1,3-dichloropropene has been studied in two ditch waters and their associated sediments using a modification of the requirements of Section G.2. of the Dutch Registration Guidelines. Preliminary experiments showed that (a) the evaporation of 1,3-dichloropropene from water had a half-life of less than 5 h, and (b) in a soil/water slurry, 1,3-dichloropropene was rapidly converted to 3-chloropropenoic acid. In the definitive experiment conducted in two sediments, the overall recovery of radioactivity was good (84·5%) given the volatile nature of the chemical. In both sediment types, 1,3-dichloropropene evaporated rapidly from water. In the Letcombe samples (organic silty clay loam) more radioactivity was associated with the sediment (40%) than ditch water (5%) than in Marcham samples (medium clay, 12% in sediment and 10% in water) and this may reflect the organic matter content of the two sediments (10·5% and 2·9% respectively). The 1,3-dichloropropene in the ditch water was rapidly converted to 3-chloropropenoic acid and other minor polar products. The material in the soil was not investigated further. |
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