Amine-enhanced photodegradation of polychlorinated biphenyls. Final report
Uncontrolled releases of polychlorinated biphenyls (PCBs) from transformers and capacitors pose a significant environmental problem to the electric utility industry. This report describes a series of experiments whose objective was to demonstrate the practicality of using natural solar radiation in conjunction with the application of an amine for in situ degradation of PCBs in contaminated soil. The soil tested was clay from beneath a capacitor rack at a pacific northwest utility substation. While no degradation of the PCBs in soil was found after two weeks of sunlight exposure, further solution experiments indicate that degradation of PCBs does occur in the presence of an amine and simulated solar radiation. In hexane solutions containing 1 ppM Aroclor 1268 with 10 and 100 ppM ethylenediamine, 37% and 53% reductions in PCB concentration, respectively, were found after 70 h of solar simulator irradiation. These results suggest that the clay matrix or other soil components may have interfered with the photodegradation process. Investigations into the reaction mechanism, reaction products, optimum treatment parameters and appropriate matrices appear to be warranted. Successful development of this in situ technique could lead to major savings in mitigation efforts for contaminated soils and surfaces.
- Research Organization:
- Battelle Pacific Northwest Labs., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 7090872
- Report Number(s):
- EPRI-CS-2513; ON: DE82021378
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORINATED AROMATIC HYDROCARBONS
PHOTOLYSIS
AMINES
IN-SITU PROCESSING
SOILS
SOLAR RADIATION
AROMATICS
CHEMICAL REACTIONS
DECOMPOSITION
HALOGENATED AROMATIC HYDROCARBONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PROCESSING
RADIATIONS
STELLAR RADIATION
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)