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http://hdl.handle.net/2445/206790
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DC Field | Value | Language |
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dc.contributor.author | Gökkuş, Ömür | - |
dc.contributor.author | Brillas, Enric | - |
dc.contributor.author | Sirés Sadornil, Ignacio | - |
dc.date.accessioned | 2024-01-31T13:36:15Z | - |
dc.date.available | 2024-01-31T13:36:15Z | - |
dc.date.issued | 2023-12-07 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/2445/206790 | - |
dc.description.abstract | The decolorization and TOC removal of solutions of Acid Brown 14 (AB14) diazo dye containing 50 mg L-1 of total organic carbon (TOC) have been first studied in a continuous-flow electrocoagulation (EC) reactor of 3 L capacity with Fe electrodes of ~110 cm2 area each. Total loss of color with poor TOC removal was found in chloride, sulfate, and/or hydrogen carbonate matrices after 18 min of this treatment. The best performance was found using 5 anodes and 4 cathodes of Fe at 13.70 A and low liquid flow rate of 10 L h-1, in aerated 39.6 mM NaCl medium within a pH range of 4.0–10.0. The effluent obtained from EC was further treated by electro-Fenton (EF) using a 2.5 L pre-pilot flow plant, which was equipped with a filter-press cell comprising a Pt anode and an air-diffusion cathode for H2O2 electrogeneration. Operating with 0.10–1.0 mM Fe2+ as catalyst at pH 3.0 and 50 mA cm-2, a similar TOC removal of 68 % was found as maximal in chloride and sulfate media using the sequential EC-EF process. The EC-treated solutions were also treated by photoelectro-Fenton (PEF) employing a photoreactor with a 125 W UVA lamp. The sequential EC-PEF process yielded a much higher TOC reduction, close to 90 % and 97 % in chloride and sulfate media, respectively, due to the rapid photolysis of the final Fe(III)-carboxylate complexes. The formation of recalcitrant chloroderivatives from generated active chlorine limited the mineralization in the chloride matrix. For practical applications of this two-step technology, the high energy consumption of the UVA lamp in PEF could be reduced by using free sunlight. | - |
dc.format.extent | 12 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1016/j.scitotenv.2023.169143 | - |
dc.relation.ispartof | Science of the Total Environment, 2023, vol. 912, p. 1-12 | - |
dc.relation.uri | https://doi.org/10.1016/j.scitotenv.2023.169143 | - |
dc.rights | cc-by-nc-nd (c) Gökkuş, Ömür et al., 2023 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.source | Articles publicats en revistes (Ciència dels Materials i Química Física) | - |
dc.subject.classification | Depuració de l'aigua | - |
dc.subject.classification | Electroquímica | - |
dc.subject.classification | Reacció d'oxidació-reducció | - |
dc.subject.other | Water purification | - |
dc.subject.other | Electrochemistry | - |
dc.subject.other | Oxidation-reduction reaction | - |
dc.title | Sequential use of a continuous-flow electrocoagulation reactor and a (photo)electro-Fenton recirculation system for the treatment of Acid Brown 14 diazo dye | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 740929 | - |
dc.date.updated | 2024-01-31T13:36:15Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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