||Sequential Anaerobic Degradation of 2,4-Dichlorophenol in Freshwater Sediments.
Zhang, X. ;
Wiegel, J. ;
||Georgia Univ., Athens.;Environmental Research Lab., Athens, GA. Office of Research and Development.;Department of Energy, Washington, DC.
||DE-FG09-86ER-13614, EPA-R-812638; EPA/600/J-94/294;
Anaerobic bacteria ;
Water pollution ;
Aquatic bacteria ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||2,4-Dichlorophenol (2,4-DCP) was degraded anaerobically in freshwater lake sediments. From observed intermediates in incubated sediment samples and from enrichment cultures, the following sequence of transformations was postulated. 2,4-DCP is dechlorinated to 4-chlorophenol (4-CP), 4-CP is dechlorinated to phenol, phenol is carboxylated to benzoate, and benzoate is degraded via acetate to methane and carbon carbon dioxide. At least five different organisms are involved sequentially. The rate-limiting step was the transformation of 4-CP to phenol. Sediment-free enrichment cultures were obtained that catalyzed only the dechlorination of 2,4-DCP, the carboxylation of phenols, and the degradation of benzoate, respectively.
||Pub. in Applied and Environmental Microbiology, v56 n4 p1119-1127 Apr 90. Sponsored by Environmental Research Lab., Athens, GA. Office of Research and Development. and Department of Energy, Washington, DC.
|NTIS Title Notes
||Reprint: Sequential Anaerobic Degradation of 2,4-Dichlorophenol in Freshwater Sediments.
||68D; 68E; 57K; 48G
||PC A02/MF A01