Journal
CHEMOSPHERE
Volume 42, Issue 3, Pages 309-318Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0045-6535(00)00066-7
Keywords
trichloroacetic; dichloroacetic; monochloroacetic; trifluoroacetic; acid; environmental fate; degradation
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The environmental fate of trichloro-, dichloro-, and monochloroacetic acids, and trifluoroacetic acid was investigated using field aquatic microcosms and laboratory sediment-water systems. Trifluoroacetic acid was extremely persistent and showed no degradation during a one-year field study, though it appeared to undergo transient partitioning within an unknown pond phase as the temperature of the surroundings was reduced. Of the three chloroacetic acids, trichloro had the longest residence time (induction and decay) (similar to 40 d), dichloro the shortest (similar to4 d), and monochloro an intermediate residence time (similar to 14 d). Laboratory studies suggest that the biodegradation of trichloro-, dichloro-, and monochloroacetic acids leads primarily to the formation of chloride and oxalic, glyoxalic, and glycolic acids, respectively. (C) 2000 Elsevier Science Ltd. All rights reserved.
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