title: Treatment of gasoline-contaminated waters by advanced oxidation processes.
abstract: In this study, the efficiency of advanced oxidative processes (AOPs) was investigated toward the degradation of aqueous solutions containing benzene, toluene and xylenes (BTX) and gasoline-contaminated waters. The results indicated that BTX can be effectively oxidized by near UV-assisted photo-Fenton process. The treatment permits almost total degradation of BTX and removal of more than 80% of the phenolic intermediates at reaction times of about 30 min. Preliminary investigations using water contaminated by gasoline suggest a good potentiality of the process for the treatment of large volumes of aqueous samples containing these polluting species. Heterogeneous photocatalysis and H2O2/UV system show lower degradation efficiency, probably due to the heterogeneous character of the TiO2-mediated system and lost of photonic efficiency of the H2O2/UV system in the presence of highly colored intermediated.
authors.affiliation: Departamento de Química, Universidade Federal do Paraná, CP 19081, 81531-990 Curitiba, PR, Brazil.
authors.forename: Elaine Regina Lopes
authors.initials: ER
authors.lastname: Tiburtius
authors.forename: Patricio
authors.initials: P
authors.lastname: Peralta-Zamora
authors.forename: Alexandre
authors.initials: A
authors.lastname: Emmel
mesh_terms: D001554:Benzene / Q000378:metabolism; D005742:Gasoline; D006861:Hydrogen Peroxide; D007501:Iron; D010084:Oxidation-Reduction; D010777:Photochemistry / Q000379:methods; D012996:Solutions; D014050:Toluene / Q000378:metabolism; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D014992:Xylenes / Q000378:metabolism
chemical_list: C045076:Fenton's reagent; D005742:Gasoline; D012996:Solutions; D014874:Water Pollutants, Chemical; D014992:Xylenes; D014050:Toluene; D006861:Hydrogen Peroxide; D007501:Iron; D001554:Benzene