Microbial dehalogenation of a hexachlorinated PCB at low redox potential. Final report
In three studies using a single PCB congener, 2,2',4,4',5,5'-hexachlorobiphenyl degradation was observed at soil concentrations between 1000 and 1500 mg HCB/KG soil, but not in a fourth study conducted at 100 mg HCB/KG soil. Degradation did not occur in controls poisoned by 0.1% mercuric chloride; however, it was enhanced by the addition of a nutrient solution at approximate ratios of 100TOC:2N:1P. The degradation was observed in both soil and sand matrices. A study of different reducing agents revealed mixed effects on the degradation process; addition of equal parts of 1-cystine hydrochloride and sodium dithionite appeared to enhance degradation, while the use of 2 parts of sodium dithionite alone had little effect. Inoculating the HCB contaminated soil with an inoculum of chlorobenzoate dechlorinating bacteria from the University of Michigan resulted in degradation of the HCB.
- Research Organization:
- Pittsburgh Univ., PA (United States). Dept. of Civil Engineering
- OSTI ID:
- 5622527
- Report Number(s):
- PB-92-151687/XAB; CNN: DI-14-08-0001-G1494
- Resource Relation:
- Other Information: See also PB86-212610. Sponsored by Geological Survey, Reston, VA., and BCR National Lab., Pittsburgh, PA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CHLORINATED AROMATIC HYDROCARBONS
BIODEGRADATION
SOILS
DECONTAMINATION
BACTERIA
CULTURE MEDIA
DECHLORINATION
GAS CHROMATOGRAPHY
HAZARDOUS MATERIALS
LAND POLLUTION CONTROL
REDOX POTENTIAL
AROMATICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
CLEANING
CONTROL
DECOMPOSITION
DEHALOGENATION
HALOGENATED AROMATIC HYDROCARBONS
MATERIALS
MICROORGANISMS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION CONTROL
SEPARATION PROCESSES
540250* - Environment
Terrestrial- Site Resource & Use Studies- (1990-)
560300 - Chemicals Metabolism & Toxicology