title: Decolorization and mineralization of Diarylide Yellow 12 (PY12) by photo-Fenton process: the Response Surface Methodology as the optimization tool.
abstract: The Response Surface Methodology (RSM) was applied as a tool for the optimization of the operational conditions of the photo-degradation of highly concentrated PY12 wastewater, resulting from a textile industry located in the suburbs of Medellin (Colombia). The Box-Behnken experimental Design (BBD) was chosen for the purpose of response optimization. The photo-Fenton process was carried out in a laboratory-scale batch photo-reactor. A multifactorial experimental design was proposed, including the following variables: the initial dyestuff concentration, the H(2)O(2) and the Fe(+2) concentrations, as well as the UV wavelength radiation. The photo-Fenton process performed at the optimized conditions resulted in ca. 100% of dyestuff decolorization, 92% of COD and 82% of TOC degradation. A kinetic study was accomplished, including the identification of some intermediate compounds generated during the oxidation process. The water biodegradability reached a final DBO(5)/DQO = 0.86 value.
authors.affiliation: GIPAB: Grupo de Investigación en Procesos Ambientales y Biotecnológicos, Departamento de Ingeniería de Procesos, Universidad EAFIT, Medellin, Colombia. egil@eafit.edu.co
authors.forename: Edison
authors.initials: E
authors.lastname: GilPavas
authors.forename: Izabela
authors.initials: I
authors.lastname: Dobrosz-Gómez
authors.forename: Miguel Ángel
authors.initials: MÁ
authors.lastname: Gómez-García
mesh_terms: D057919:Biological Oxygen Demand Analysis; D003105:Colombia; D004396:Coloring Agents / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007220:Industrial Waste; D007700:Kinetics; D008956:Models, Chemical; D010782:Photolysis; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D005296:Ferrous Compounds; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide