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Photo-electrochemical treatment of reactive dyes in wastewater and reuse of the effluent: method optimization
Sala Gastón, Mireia; López Grimau, Víctor; Gutiérrez Bouzán, María Carmen
Universitat Politècnica de Catalunya. Institut d'Investigació Tèxtil i Cooperació Industrial de Terrassa; Universitat Politècnica de Catalunya. Departament de Projectes d'Enginyeria; Universitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
In this work, the efficiency of a photo-electrochemical method to remove color in textile dyeing effluents is discussed. The decolorization of a synthetic effluent containing a bi-functional reactive dye was carried out by applying an electrochemical treatment at different intensities (2 A, 5 A and 10 A), followed by ultraviolet irradiation. The combination of both treatments was optimized. The final percentage of effluent decolorization, the reduction of halogenated organic volatile compound and the total organic carbon removal were the determinant factors in the selection of the best treatment conditions. The optimized method was applied to the treatment of nine simulated dyeing effluents prepared with different reactive dyes in order to compare the behavior of mono, bi, and tri-reactive dyes. Finally, the nine treated effluents were reused in new dyeing processes and the color differences (DECMC ((2: 1))) with respect to a reference were evaluated. The influence of the effluent organic matter removal on the color differences was also studied. The reuse of the treated effluents provides satisfactory dyeing results, and an important reduction in water consumption and salt discharge is achieved.
Àrees temàtiques de la UPC::Enginyeria química::Indústries químiques::Química tèxtil
Àrees temàtiques de la UPC::Enginyeria tèxtil ::Fabricació tèxtil::Tintura
Electrochemical analysis
Ultraviolet radiation
Oxidation
Reactive dyes
electrochemical
UV irradiation
indirect-oxidation
effluents reuse
reactive dyes
mono-functional
bi-functional
tri-functional
ELECTROCHEMICAL OXIDATION
TEXTILE WASTEWATERS
DYEING WASTEWATERS
DECOLORIZATION
REMOVAL
TECHNOLOGIES
ADSORBENTS
Electroquímica
Radiació ultraviolada
Oxidació
Colorants -- Química
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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