Oxidation of PAHs in water solution by ozone combined with ultraviolet radiation
The oxidation of three polycyclic aromatic hydrocarbons (PAHs): benzo[a]pyrene (BAP), chrysene (CHR) and fluorene (FLU) in aqueous solution using ozone assisted by UV radiation was investigated. The influence of pH of the reaction mixture, ozone concentration and the presence of a radical scavenger...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2001-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X01000113 |
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| Summary: | The oxidation of three polycyclic aromatic hydrocarbons (PAHs): benzo[a]pyrene (BAP), chrysene
(CHR) and fluorene (FLU) in aqueous solution using ozone assisted by UV radiation was investigated. The
influence of pH of the reaction mixture, ozone concentration and the presence of a radical scavenger on the
reaction rate was determined. The highest rate of PAHs disappearance was achieved in acidic solutions. The
radical scavenger-tert-butanol, effectively inhibited the rate of BAP and CHR destruction but had a slight
influencein thecaseof FLU. Therateconstants of direct reaction of PAHs with ozonewe recalculate d using
our earlier investigations and they were equal to 6.8×104; 6.9×103 and 62M-1s-1 for BAP, CHR and FLU,
respectively. The contributions of direct ozonolysis, photolysis and radical reaction to PAHs oxidation in O3/UV system were evaluated. |
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| ISSN: | 1110-662X |