Oxidation of PAHs in water solution by ozone combined with ultraviolet radiation

Autor: Stanislaw Ledakowicz, Jacek S. Miller, Dorota Olejnik
Jazyk: angličtina
Rok vydání: 2001
Předmět:
Zdroj: International Journal of Photoenergy, Vol 3, Iss 2, Pp 95-101 (2001)
Druh dokumentu: article
ISSN: 1110-662X
1110662X
DOI: 10.1155/S1110662X01000113
Popis: 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.
Databáze: Directory of Open Access Journals
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