title: Alkydic resin wastewaters treatment by fenton and photo-Fenton processes.
abstract: Advanced oxidation processes are an emerging option to treatment of the painting industry effluents. The aim of this study was to compare the effectiveness of the Fenton and photo-Fenton processes in chemical oxygen demand (COD), total organic carbon (TOC) and phenolic compounds removal from wastewaters generated during alkydic resins manufacture. The optimized treatment conditions are the following: pH 3.0, 15.15x10(-3)molL(-1) FeSO(4) and 0.30molL(-1) H(2)O(2) for a reaction time of 6h. photo-Fenton experiments were carried out in the presence of sunlight or artificial radiation and complementary additions of H(2)O(2) were made for all experiments. The best results were obtained with photo-Fenton process assisted with solar radiation, with reductions of 99.5 and 99.1% of COD and TOC levels, respectively. Fenton and photo-Fenton (with artificial irradiation) processes presented lower but not insignificant removals, within 60-80% reduction for both COD and TOC. In addition, an excellent removal (95%) of total phenols was obtained using photo-Fenton process assisted with artificial irradiation. This study demonstrated that the use of photo-Fenton process on alkydic resins wastewater treatment is very promising especially when solar light is used.
authors.affiliation: Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Av. Ipiranga 6681, 90619-900, Porto Alegre, RS, Brazil.
authors.forename: Isadora Schwingel
authors.initials: IS
authors.lastname: de Oliveira
authors.forename: Lilian
authors.initials: L
authors.lastname: Viana
authors.forename: Cenira
authors.initials: C
authors.lastname: Verona
authors.forename: Vera Lúcia Vargas
authors.initials: VL
authors.lastname: Fallavena
authors.forename: Carla Maria Nunes
authors.initials: CM
authors.lastname: Azevedo
authors.forename: Marçal
authors.initials: M
authors.lastname: Pires
mesh_terms: D002244:Carbon / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D010150:Paint; D010636:Phenols / Q000737:chemistry* / Q000528:radiation effects*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D007220:Industrial Waste; D016877:Oxidants; D010636:Phenols; D014874:Water Pollutants, Chemical; D002244:Carbon; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen