title: Fosetyl-Al photo-Fenton degradation and its endogenous catalyst inhibition.
abstract: Interferences from many sources can affect photo-Fenton reaction performance. Among them, catalyst inhibition can be caused by the complexation and/or precipitation of iron species by the organic matter and salts present in the reaction media. This is the case of the oxidation of effluents containing organophosphorous fosetyl-Al. The degradation of this fungicide generates phosphate anions that scavenge iron and hinder Fe(II) availability. Experimental design was applied to artificially enlighten photo-Fenton reaction, in order to evaluate fosetyl-Al degradation. The performed experiments suggested how iron inhibition takes place. The monitoring of photo-Fenton reaction over a mixture of fosetyl-Al with other two pesticides also showed the interferences caused by the presence of the fungicide on other species degradation. Solar empowered photo-Fenton was also essayed for comparison purposes. Artificial and solar light photo-Fenton reactions were revealed as effective treatments for the elimination of tested fungicide. However, the phosphate ions generated during fosetyl oxidation decreased iron availability, what hampered organic matter degradation.
authors.affiliation: Departament d'Enginyeria Química, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain. Electronic address: mmarmico@angel.qui.ub.es.
authors.forename: María M
authors.initials: MM
authors.lastname: Micó
authors.affiliation: Plataforma Solar de Almería (CIEMAT), Carretera Senés, Km 4, 04200 Tabernas, Almería, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Zapata
authors.affiliation: Plataforma Solar de Almería (CIEMAT), Carretera Senés, Km 4, 04200 Tabernas, Almería, Spain.
authors.forename: Manuel I
authors.initials: MI
authors.lastname: Maldonado
authors.affiliation: ACCIONA Agua, S.A.U. Avda. de les Garrigues, 22, Parque de Negocios Mas Blau II, 08820 El Prat de Llobregat, Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Bacardit
authors.affiliation: ACCIONA Agua, S.A.U. Avda. de les Garrigues, 22, Parque de Negocios Mas Blau II, 08820 El Prat de Llobregat, Barcelona, Spain.
authors.forename: Jorge
authors.initials: J
authors.lastname: Malfeito
authors.affiliation: Departament d'Enginyeria Química, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
authors.forename: Carme
authors.initials: C
authors.lastname: Sans
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002384:Catalysis; D005296:Ferrous Compounds / Q000737:chemistry*; D005659:Fungicides, Industrial / Q000737:chemistry* / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry; D009943:Organophosphorus Compounds / Q000737:chemistry* / Q000378:metabolism; D010084:Oxidation-Reduction; D013472:Sunlight; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000378:metabolism; D018508:Water Purification
chemical_list: D005296:Ferrous Compounds; D005659:Fungicides, Industrial; D009943:Organophosphorus Compounds; D014874:Water Pollutants, Chemical; D017665:Hydroxyl Radical; C053504:fosetyl-Al; C020748:ferrous sulfate; D006861:Hydrogen Peroxide
keywords: Biodegradability; Experimental design; Ferric phosphate; Organophosphorous; Solar photo-Fenton