title: Solar photoassisted advanced oxidation process of azo dyes.
abstract: Advanced oxidation processes assisted with natural solar radiation in CPC type reactors (parabolic collector compound), was applied for the degradation of three azo dyes: acid orange (AO7), acid red 151 (AR151) and acid blue 113 (AB113). Fenton, Fenton like and ferrioxalate-type complexes showed to be effective for degrade the azo linkage and moieties in different extensions. Initially, the best dose of reagents (Fe(3 + )-H(2)O(2)) was determined through a factorial experimental design, next, using response surface methodologies, the reagent consumption was reduced up to 40%, maintaining in all cases high decolourisation percentages (>98%) after 60 min. of phototreatment. In this work, it was also studied the effect of concentration changes of the influent between 100-300 mg/L and the operation of the photocatalytic process near neutral conditions (pH 6.0-6.5) by using ferrioxalate type complex (FeOx).
authors.affiliation: Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Querétaro, 76230, México. dpratog@iingen.unam.mx
authors.forename: D
authors.initials: D
authors.lastname: Prato-Garcia
authors.forename: G
authors.initials: G
authors.lastname: Buitrón
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000378:metabolism; D010084:Oxidation-Reduction / Q000528:radiation effects; D055668:Photochemical Processes / Q000528:radiation effects*
chemical_list: D001391:Azo Compounds