Kinetic models for the electrochemical decolouration of two reactive azo dyes
In this work, the indirect oxidation of two azo dyes (Colour Index Reactive Orange 4 and 13) was performed in an electrochemical batch cell in the presence of chloride as an electrolyte. The effect of different operational parameters on the electrochemical treatment was tested. Kinetic plots consist...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| 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:2117/126983 |
| Acceso en línea: | https://hdl.handle.net/2117/126983 https://dx.doi.org/10.5004/dwt.2018.22901 |
| Access Level: | acceso abierto |
| Palabra clave: | Reactive dyes Azo dyes Electrochemistry Electrochemical oxidation Decolouration rate Kinetic models Factorial experimental design Colorants azoics Electroquímica Àrees temàtiques de la UPC::Enginyeria química::Química física::Electroquímica |
| Sumario: | In this work, the indirect oxidation of two azo dyes (Colour Index Reactive Orange 4 and 13) was performed in an electrochemical batch cell in the presence of chloride as an electrolyte. The effect of different operational parameters on the electrochemical treatment was tested. Kinetic plots consisting of two linear portions were obtained in some experiments. The rate constants and the breaking point between the two linear portions were modelled to evaluate the influence of dye concentration, conductivity and pH. Good correlation between the experimental and the modelled constants and breaking points was observed. Models showed that the dye concentration is the most significant factor in the electrochemical treatment of both dyes, although conductivity and pH were also significant either individually or in interaction with other factors. |
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