Program One
Wednesday, May 21, 1997

Remediation Kansa A



P.K.S. Nam1, Q. Liu1, S. Kapila1, T.E. Clevenger2, and R. Curry3, 1Department of Chemistry, 2Department of Civil Engineering and Missouri Water Resources Center, and 3Department of Electrical Engineering, University of Missouri- Columbia, Columbia, MO 65211. Despite the passage of 21 years since the moratorium on production of polychlorinated biphenyls (PCBs), these compounds remain a significant cause of environmental concern. The PCB-contaminated media of most interest are dielectric fluids and soils.

A number of techniques for destruction of PCBs in dielectric fluids have been developed. The PCB degradation in soil, however, is considerably more problematic. Scientists at the University of Missouri are exploring a new approach, involving irradiation of contaminated soil with 1.25 MeV gamma rays from a 60Co source either in the original soil or in soils containing an alcohol/alkane mixture.

Chemical analyses of the irradiated soils show that the PCBs are readily transformed by exposure to gamma rays. Preliminary results show that the transformation in soils occurs preferentially through reductive dechlorination. This is in agreement with results obtained by Mincher et al. Furthermore, dechlorination occurs without a preference for the position or the number of chlorines. Degradation of Aroclor 1260 from 360 ppm to Key words: polychlorinated biphenyls, irradiated soils, gamma rays, dechlorination

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Tuesday, May 20, 1997

Metals Kansa A

Remediation of Munitions Compounds Kansa B

Analytical Methods Kansa C/D

General Topics Kansa B

Wednesday, May 21, 1997

Metals Kansa A

Zero-Valent Metals Kansa A

Remediation Kansa A

Vegetation-based Remediation Kansa B

Partnerships & Innovative Technologies Kansa C/D

Nonaqueous Phase Liquids Kansa C/D

Thursday, May 22, 1997

Biofilms & Barriers Kansa A

Bioremediation Kansa B

Partnerships & Technology Innovations Kansa C/D

Remediation Kansa C/D


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