Using central composite experimental design to optimize the degradation of real dye wastewater by Fenton and photo-Fenton reactions
This work focuses on the use of Fenton reagent and UV-irradiation, in a lab-scale experiment, for the treatment of real dye wastewater coming from a Spanish textile manufacturer. Response surface methodology and a 23 factorial design were used to evaluate the effects of the three independent variabl...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/23562 |
| Acceso en línea: | https://hdl.handle.net/2117/23562 https://dx.doi.org/10.1016/j.dyepig.2013.09.004 |
| Access Level: | acceso abierto |
| Palabra clave: | Textile chemistry Oxidation-reduction reaction Advanced oxidation processes Central composite design Chemical oxygen demand reduction Fenton Photochemical reactions Real dye wastewater Química tèxtil -- Residus Reacció d'oxidació-reducció Àrees temàtiques de la UPC::Enginyeria química::Indústries químiques::Química tèxtil Àrees temàtiques de la UPC::Enginyeria química::Indústria dels processos químics |
| Sumario: | This work focuses on the use of Fenton reagent and UV-irradiation, in a lab-scale experiment, for the treatment of real dye wastewater coming from a Spanish textile manufacturer. Response surface methodology and a 23 factorial design were used to evaluate the effects of the three independent variables considered for the optimization of the oxidative process: temperature, Fe (II) and H2O2 concentrations, for a textile wastewater generated during a dyeing process with chemical oxygen demand of 1705 mg L -1 O2 at pH = 3. Wastewater degradation was followed in terms of chemical oxygen demand reduction. In the optimization, the correlation coefficients for the model (R2) were 0.985 and 0.990 for Fenton and photo-Fenton treatments respectively. Optimum reaction conditions at pH = 3 and temperature = 298 K were [H2O2] = 73.5 mM and [Fe(II)] = 1.79 mM. The combination of Fenton, Fenton-like and photon-Fenton reactions has been proved to be highly effective for the treatment of such a type of wastewaters, and several advantages for this technique arise from the study. Under optimum conditions, 120 min of treatment resulted in a 62.9% and 76.3% reduction in chemical oxygen demand after Fenton and photo-Fenton treatments respectively. |
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