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dc.contributor.authorLópez Grimau, Víctor
dc.contributor.authorGutiérrez Bouzán, María Carmen
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Projectes d'Enginyeria
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut d'Investigació Tèxtil i Cooperació Industrial de Terrassa
dc.identifier.citationLopez-Grimau, V.; Gutiérrez, M. Decolourisation of simulated reactive dyebath effluents by electrochemical oxidation assisted by UV light. "Chemosphere", 01 Gener 2006, vol. 62, núm. 1, p. 106-112.
dc.description.abstractThis study is focused on the optimisation of the electrochemical decolourisation of textile effluents containing reactive dyes with the aim of making feasible—technically and economically—this method at industrial scale. Coloured waters were treated in continuous at low current density, to reduce the electrical consumption. Ti/PtOx electrodes were used to oxidize simulated dyebaths prepared with an azo/dichlorotriazine reactive dye (C.I. Reactive Orange 4). The decolourisation yield was dependent on the dyeing electrolyte (NaCl or Na2SO4). Dyeing effluents which contained from 0.5 to 20 g l−1 of NaCl reached a high decolourisation yield, depending on the current density, immediately after the electrochemical process. These results were improved when the effluents were stored for several hours under solar light. After the electrochemical treatment the effluents were stored in a tank and exposed under different lighting conditions: UV light, solar light and darkness. The evolution of the decolourisation versus the time of storage was reported and kinetic constants were calculated. The time of storage was significantly reduced by the application of UV light. A dye mineralization study was also carried out on a concentrated dyebath. A TOC removal of 81% was obtained when high current density was applied for a prolonged treatment with recirculation. This treatment required a high electrical consumption.
dc.format.extent7 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Indústries químiques::Química tèxtil
dc.subjectÀrees temàtiques de la UPC::Enginyeria tèxtil::Indústria tèxtil
dc.subject.lcshElectrolytic cells
dc.subject.lcshTextile chemical industry -- Sewage
dc.subject.lcshElectrolytes -- Dyes and dyeing
dc.titleDecolourisation of simulated reactive dyebath effluents by electrochemical oxidation assisted by UV light
dc.subject.lemacElectròlits -- Tints i tenyit
dc.subject.lemacIndústria tèxtil -- Aigües residuals
dc.contributor.groupUniversitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
upcommons.citation.authorLopez-Grimau, V.; Gutiérrez, M.

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