Main Title |
Regiospecific Dechlorination of Pentachlorophenol by Dichlorophenol-Adapted Microorganisms in Freshwater, Anaerobic Sediment Slurries. |
Author |
Bryant, F. O. ;
Hale, D. D. ;
Rogers, J. E. ;
|
CORP Author |
Environmental Research Lab., Athens, GA. ;Technology Applications, Inc., Athens, GA. |
Publisher |
c1991 |
Year Published |
1991 |
Report Number |
EPA/600/J-91/221; |
Stock Number |
PB92-101674 |
Additional Subjects |
Dechlorination ;
Microbial degradation ;
Anaerobic processes ;
Water pollution ;
Sediments ;
Biodeterioration ;
Freshwater ;
Biological communities ;
Reaction kinetics ;
Biochemistry ;
Chemical analysis ;
Gas chromatography ;
Mass spectroscopy ;
Sediment-water interfaces ;
Aquatic microorganisms ;
Reduction(Chemistry) ;
Reprints ;
Phenol/pentachloro ;
Chemical reaction mechanisms ;
Phenol/dichloro
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB92-101674 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
11p |
Abstract |
The reductive dechlorination of pentachlorophenol (PCP) was investigated in anaerobic sediments that contained nonadapted or 2,4- or 3,4-dichlorophenol-adapted microbial communities. Adaptation of sediment communities increased the rate of conversion of 2,4- or 3,4-DCP to monochlorophenols (CPs) and eliminated the lag phase before dechlorination was observed. Both 2,4- and 3,4-DCP-adapted sediment communities dechlorinated the six DCP isomers to CPs. The specificity of chlorine removal from the DCP isomers indicated a preference for ortho-chlorine removal by 2,4-DCP-adapted sediment communities and for para-chlorine removal by 3,4-DCP-adapted sediment communities. Sediment slurries containing nonadapted microbial communities either did not dechlorinate PCP or did so following a lag phase of at least 40 days. Sediment communities adapted to dechlorinate 2,4- or 3,4-DCP dechlorinated PCP without PCP without an initial lag phase. The 2,4-DCP-adapted communities initially removed the ortho-chlorine from PCP, whereas the 3,4-DCP-adapted communities initially removed the para-chlorine from PCP. A 1:1 mixture of the adapted sediment communities also dechlorinated PCP without a lag phase. Intermediate products of degradation--2,3,5,6-tetrachlorophenol, 2,3,5-trichlorophenol, 3,5-DCP, 3-CP, and phenol--were identified by a combination of cochromatography (high-pressure liquid chromatography) with standards and gas chromatography-mass spectrometry. (Copyright (c) 1991, American Society for Microbiology.) |
Supplementary Notes |
Pub. in Applied and Environmental Microbiology, v57 n8 p2293-2301 Aug 91. Prepared in cooperation with Technology Applications, Inc., Athens, GA. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Regiospecific Dechlorination of Pentachlorophenol by Dichlorophenol-Adapted Microorganisms in Freshwater, Anaerobic Sediment Slurries. |
Category Codes |
68D; 57K; 57H; 57B; 48G; 99F |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
133917653 |
Origin |
NTIS |
Type |
CAT |