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Main Title Dechlorination of pentachlorophenol 1,4-dichlorophenoxyacetic acid and 2,4,5-trichlorophenoxyacetic acid in anaerobic freshwater sediments /
Author Bryant, Frank Osborn, ; Rogers, J. E.
Other Authors
Author Title of a Work
Rogers, John E.
CORP Author Environmental Research Lab., Athens, GA. ;Technology Applications, Inc., Athens, GA.
Publisher U.S. Envrironmental Protection Agency, Office of Research and Development, Environmental Research Laboratory,
Year Published 1990
Report Number EPA/600/M-90/006
Stock Number PB90-181306
Additional Subjects Biodeterioration ; Chlorination ; Water reclamation ; Sediments ; Fresh water ; Graphs(Charts) ; Chemical water pollutants ; Dichlorophenoxyacetic acid ; Trichlorophenoxyacetic acid ; Pentachlorophenol ; Biotransformation
Library Call Number Additional Info Location Last
NTIS  PB90-181306 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16 pages ; 28 cm
Pentachlorophenol, 2,4-dichlorophenoxyacetic acid and 2,4,5-trichlorophenoxyacetic acid were transformed by microbial reductive dechlorination in freshwater, anaerobic sediments from such diverse locations as Georgia, Florida, New York and the Soviet Union. The reductive dechlorination process involves removal of a chlorine and replacement with a hydrogen. Sediments previously adapted to dechlorinate dichlorophenols were found to mediate dechlorination at much faster rates than unadapted sediments. Pentachlorophenol dechlorination in dichlorophenol-adapted sediments generated tetra-, tri-, di-, and monochlorophenol and phenol. Concentrations of pentachlorophenol, 2,4-dichlorophenoxyacetic acid and 2,4,5-trichlorophenoxyacetic acid up to 100 ppm were dechlorinated by adapted sediments. Reductive dechlorination of PCP, 2,4-D, and 2,4,5-T was region specific for chlorine removal as determined by the dichlorophenol isomer used to adapt the sediment. Sediment adapted to 2,4-dichlorophenol preferentially removed chlorines from the ortho position; whereas sediment adapted to 3,4-dichlorophenol preferentially removed chlorines from the para position.
Includes bibliographical references. "February 1990." Microfiche.