Decolorization and mineralization of Diarylide Yellow 12 (PY12) by photo-Fenton process: the Response Surface Methodology as the optimization tool.
Fecha
2012-01-01
Autores
GilPavas, Edison
Dobrosz-Gomez, Izabela
Angel Gomez-Garcia, Miguel
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Editor
IWA PUBLISHING
Resumen
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.
Descripción
Palabras clave
Box-Behnken experimental design , Colombia , Diarylide , Intermediate compound , Kinetic study , Laboratory scale , Operational conditions , Optimization tools , Optimized conditions , Oxidation process , Photo-Fenton process , Response surface methodology , Statistical optimization , Textile wastewater , UV wavelength , Biodegradation , Degradation , Statistics , Surface properties , Textile finishing , Textile industry , Textile processing , Wavemeters , Optimization , coloring agent , diarylide yellow 12 , ferrous ion , hydrogen peroxide , industrial chemical , unclassified drug , biodegradation , bioreactor , chemical oxygen demand , experimental design , mineralization , optimization , photodegradation , photooxidation , textile industry , total organic carbon , wastewater , wavelength , article , batch reactor , biodegradability , concentration (parameters) , decolorization , dyestuff concentration , experimental design , kinetics , mineralization , oxidation , photo Fenton process , photodegradation , response surface method , ultra