title: Multifactorial optimization of the decolorisation parameters of wastewaters resulting from dyeing flowers.
abstract: This work deals with the treatment of the wastewaters resulting from the process of dyeing flowers. In some local cases for growing flowers near to Medellín (Colombia), wastewater color was found to be one of the main problems in meeting local effluent standards. Wastewaters were treated by photodegradation process (which includes photocatalysis) to achieve the degradation of dyes mixture and organic matter in the wastewater. A multifactorial experimental design was proposed, including as experimental factors the following variables: pH, and the concentration of both catalyst (TiO(2)) and hydrogen peroxide (H(2)O(2)). According to the obtained results, at the optimized variables values, it is possible to reach a 99% reduction of dyes, a 76.9% of mineralization (TOC) and a final biodegradability of 0.834. Kinetic analysis allows proposing a pseudo first order reaction for the reduction, the mineralization, and the biodegradation processes.
authors.affiliation: GIPAB: Grupo de Investigación en Procesos Ambientales y Biotecnológicos, Departamento de Ingeniería de Procesos, Universidad EAFIT, Carrera 49 #7 sur 50, Medellín, Colombia. egil@eafit.edu.co
authors.forename: Edison Gil
authors.initials: EG
authors.lastname: Pavas
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Gómez-García
mesh_terms: D001673:Biodegradation, Environmental; D035264:Flowers / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D014025:Titanium