| Full text | |
| Author(s): |
Maiara B. Ferreira
[1]
;
Elaine Cristina M. de Moura Santos
[2]
;
José H. Oliveira Nascimento
[3]
;
Felipe M. Fontes Galvão
[4]
;
Elisama Vieira dos Santos
[5]
;
José Eudes Lima Santos
[6]
;
Patricio J. Espinoza-Montero
[7]
;
Carlos A. Martínez-Huitle
[8]
Total Authors: 8
|
| Affiliation: | [1] Federal University of Rio Grande do Norte. Campus Universitário - Brasil
[2] Federal University of Rio Grande do Norte. Campus Universitário - Brasil
[3] Federal University of Rio Grande do Norte. Department of Textile Engineering - Brasil
[4] Federal University of Rio Grande do Norte. Department of Textile Engineering - Brasil
[5] Federal University of Rio Grande do Norte. Campus Universitário - Brasil
[6] Federal University of Rio Grande do Norte. Campus Universitário - Brasil
[7] Pontificia Universidad Católica del Ecuador - Equador
[8] Federal University of Rio Grande do Norte. Campus Universitário - Brasil
Total Affiliations: 8
|
| Document type: | Journal article |
| Source: | Journal of the Mexican Chemical Society; v. 67, n. 4, p. 432-447, 2024-04-26. |
| Abstract | |
Abstract. Electrochemical oxidation (EO) has been investigated as an alternative treatment technique for the remediation of real textile effluents containing a single dye and a trichromy of Remazol Yellow 3RS (RY 3RS), Remazol Red RR Gran (RR-RR Gran) and Navy Blue CL-R (NB CL-R) dyes, using a parallel plate flow reactor equipped with Ti/Pt or Ti/Pt-Sn-Sb electrocatalytic materials and Ti as cathode. The influence of the anode material and applied current densities on decolourization, organic matter decrease, cell potential and energy consumption during EO was examined. Higher color removal was achieved with Ti/Pt-Sn-Sb in all treated effluents compared to Ti/Pt at all electrolysis times, due to high oxidant production, especially hydroxyl radicals on their surface. Polymer film formation on the anode surface inhibited chemical oxygen demand (COD) removal during the treatment of a single effluent containing RY 3RS and RR-RR Gran dyes with either anode, whereas COD removal efficiencies of 13.93 % and 30.03 %, and 54.74 % and 74.48 % were obtained for Ti/Pt and Ti/Pt-Sn-Sb, respectively, in treating trichromy effluent after 240 min of electrolysis. Lower energy consumption was required by Ti/Pt-Sn-Sb compared to the Ti/Pt anode. In most of the trials studied, EO enhanced dissolved oxygen (DO) and reduced effluent turbidity, making it safe for disposal in the environment. (AU) | |
| FAPESP's process: | 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies |
| Grantee: | Maria Valnice Boldrin |
| Support Opportunities: | Research Projects - Thematic Grants |