title: Effect of organic species on the solar detoxification of water polluted with pesticides.
abstract: The effect of organic species on a solar-driven photo-Fenton treatment of a mixture of pesticides (methyl-oxydemethon, methidathion, carbaryl and dimethoate) has been studied in this paper. Triethoxyisododecyl alcohol, acetophenone and ethylenediaminetetraacetic acid (EDTA) have been used as examples of surfactants, solvents and complexing agents, respectively. An inhibitory effect on mineralization as well as on the elimination of the pesticides was observed in the case of the aliphatic surfactants, most probably due to the competition between the pesticides and the added organic matter for reaction with the relatively unselective hydroxyl radical. A methodology combining chemical analyses and bioassays was tested in order to explore the applicability of coupling a photo-Fenton process with a biological treatment in the presence of the surfactant. Despite the complexity of the mixture under study, a reliable monitoring of the process was accomplished; the biocompatibility of the mixture was enhanced and the optimal irradiation intensity was achieved just after complete removal of the pesticides.
authors.affiliation: Grupo de Procesos de Oxidación Avanzada, Departamento de Ingeniería Textil y Papelera, Universidad Politécnica de Valencia, Campus de Alcoy, 03801 Alcoy, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Soler
authors.forename: L
authors.initials: L
authors.lastname: Santos-Juanes
authors.forename: P
authors.initials: P
authors.lastname: Miró
authors.forename: R
authors.initials: R
authors.lastname: Vicente
authors.forename: A
authors.initials: A
authors.lastname: Arques
authors.forename: A M
authors.initials: AM
authors.lastname: Amat
mesh_terms: D006861:Hydrogen Peroxide; D009930:Organic Chemicals; D010575:Pesticides / Q000737:chemistry* / Q000528:radiation effects; D013472:Sunlight; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D009930:Organic Chemicals; D010575:Pesticides; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide