title: Analytical and toxicological studies of decomposition of insecticide parathion after gamma-irradiation and ozonation.
abstract: The decomposition of the widely used organophosphorus pesticide parathion was carried out in aqueous solutions by the use of gamma-irradiation from a 60Co source or ozonation by means of an ozone generator, and by combined processes of ozonation and radiolysis. Factors affecting the parathion decomposition as well formation and decomposition of the main by-products, including irradiation dose, length of ozonation time, and presence of common scavengers, were investigated. The most efficient was found to be the gamma-irradiation process combined with a short ozonation period; about 1 kGy irradiation dose was sufficient to decompose the pesticide in 15 mg/L solutions. Chemical studies of the decomposition of parathion were accompanied by monitoring of toxicity changes of irradiated solutions with the Microtox test.
authors.affiliation: Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195, Warsaw, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Bojanowska-Czajka
authors.forename: Murat
authors.initials: M
authors.lastname: Torun
authors.forename: Gabriel
authors.initials: G
authors.lastname: Kciuk
authors.forename: Mariusz
authors.initials: M
authors.lastname: Wachowicz
authors.forename: Dilek Solpan
authors.initials: DS
authors.lastname: Ozbay
authors.forename: Olgun
authors.initials: O
authors.lastname: Guven
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Bobrowski
authors.forename: Marek
authors.initials: M
authors.lastname: Trojanowicz
mesh_terms: D002623:Chemistry Techniques, Analytical; D005720:Gamma Rays; D007306:Insecticides / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D010278:Parathion / Q000737:chemistry*
chemical_list: D007306:Insecticides; D010278:Parathion; D010126:Ozone