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Photo-Electrochemical Treatment of Reactive Dyes in Wastewater and Reuse of the Effluent: Method Optimization
Abstract
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.
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EO has the advantage of not producing sludge or concentrates, and the high salinity of textile wastewater may be an advantage for dyeing wastewater reuse [13-15].
“It has also the advantage of not producing sludge or concentrates and, in this case, the high salinity of the textile wastewater may be an advantage for the dyeing wastewater reuse [13][14][15].”
From Reuse of Textile Dyeing Wastewater Treated by Electrooxidation (2022) · cites this paper as [13]
Section 2.4 reports successful reuse of treated effluent in dyeing and says reuse considerably reduced the salinity of discharged effluent, supporting a benefit associated with reusing saline wastewater. The Introduction describes electrochemical treatment as using an electron as a clean reagent, but our copy does not state that it produces no sludge or concentrates. (LLM, conf=0.82)
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Research works printed but not linked: 26
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Cited by
Sorted by citations
Reuse of Textile Dyeing Wastewater Treated by Electrooxidation
Pinto, C., Fernandes, A., Lopes, A., Nunes, M. J., Baía, A., Ciríaco, L., & Pacheco, M. J. (2022) · Water · doi:10.3390/w14071084 · Cited by 32
Metadata
- Authors
- Sala, M., López-Grimau, V., & Gutiérrez-Bouzán, C.
- Affiliations
- Institut d'Investigació Tèxtil i Cooperació Industrial de Terrassa (INTEXTER), Universitat Politècnica de Catalunya-BarcelonaTech (UPC), C/Colom 15, 08222 Terrassa, Spain
- Venue
- Materials
- Publisher
- MDPI AG
- Published
- 2014-11-14
- Volume
- 7
- Issue
- 11
- Pages
- 7349-7365
- ISSN
- 1996-1944
- PMC
- PMC5512639
- Cited by
- 44
- References
- 0
- Language
- en
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