| 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 |
| 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 |
Date Modified |
| NTIS |
|
PB92-101674 |
Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. |
NTIS |
02/24/1992 |
|
| 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 |
| Control Number |
133917653 |
| Cataloging Source |
NTIS/MT |
| Origin |
NTIS |
| Type |
CAT |
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