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Your search keyword '"Kozhevnikova, Natalia S."' showing total 13 results
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12. Photolysis of polychlorobiphenyls in the presence of nanocrystalline TiO2 and CdS/TiO2.

Author

Gorbunova, Tatiana I., Kozhevnikova, Natalia S., Vorokh, Andrey S., Enyashin, Andrey N., Pervova, Marina G., Zapevalov, Alexander Ya., Saloutin, Victor I., and Chupakhin, Oleg N.

Abstract

We study the photolytic degradation of planar (PCB 2, PCB 12, PCB 13, PCB 15) and non-planar (PCB 8, PCB 29, PCB 31) polychlorobiphenyls in an aqueous alcohol under UV irradiation (λ = 240–320 nm) at ambient temperature and atmospheric pressure for 25 h on nanocrystalline TiO2 and CdS/TiO2. It is found that a conversion of PCB 2 (12.5%), PCB 12 (42.3%) and PCB 29 (98.0%) is more intense in the presence of the CdS/TiO2 composite, whereas mixture of the congeners PCB 8, PCB 13, PCB 15 and the congener PCB 31 can be photolyzed better in the presence of TiO2 with conversion 35.2% and 96.1%, respectively. The different conversions of the PCB congeners are explained considering the structures of the chloroaromatic radicals formed in situ as a result of the primary photolysis process and are confirmed by means of estimation of dipole moments calculated for singlet states of PCBs. [ABSTRACT FROM AUTHOR]

Published
2019
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