||Dechlorination Activity (Cross-Acclimation) of Freshwater Sediments Adapted to Mono- and Di-Chlorophenols.
Kong, I. C. ;
Hubbard, J. S. ;
Jones, W. J. ;
||Environmental Research Lab., Athens, GA. ;Georgia Inst. of Tech., Atlanta.
Water pollution control ;
Environmental effects ;
Chemical reactions ;
Sediment-water interfaces ;
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The reductive dechlorination of chlorophenols (CPs) in sediment slurries (10% solids) adapted to dechlorinate mono- and di-CPs (DCP) was investigated to define the regiospecificity of the dechlorination reaction. Unadapted sediment slurries amended with various ortho-substituted CPs exhibited lag periods ranging from 8 to 12 days before the onset of dechlorination. In contrast, 2- and 3-CP as well as 2,3- and 2,4-DCP were dechlorinated without a lag period by sediments adapted to transform 2-CP. Dechlorination of 4-CP was not observed after incubation for 35 days.