Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/167138
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Droguett, Constanza | - |
dc.contributor.author | Salazar, Ricardo | - |
dc.contributor.author | Brillas, Enric | - |
dc.contributor.author | Sirés Sadornil, Ignacio | - |
dc.contributor.author | Carlesi, Carlos | - |
dc.contributor.author | Marco, José F. | - |
dc.contributor.author | Thiam, Abdoulaye | - |
dc.date.accessioned | 2020-07-01T13:11:48Z | - |
dc.date.available | 2022-06-11T05:10:19Z | - |
dc.date.issued | 2020-06-11 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/2445/167138 | - |
dc.description.abstract | The development of heterogeneous Fenton-based electrochemical advanced oxidation processes is important for the removal of organic pollutants at industrial level in the near future. This work reports the application of heterogeneous photoelectro-Fenton (HPEF) with UVA light as an enhanced alternative to the more widespread heterogeneous electro-Fenton (HEF) process. The treatment of the antibiotic cephalexin using chalcopyrite as a sustainable catalyst was studied using an undivided IrO2/air-diffusion cell. XPS analysis showed the presence of Fe(III), Cu(I) and Cu(II) species on the surface. The amount of Fe2+ ions dissolved upon chalcopyrite exposure to continuous stirring and air bubbling was proportional to chalcopyrite content. In all cases, the occurrence of pH self-regulation to an optimum value near 3 was observed. The HEF and HPEF treatments of 100 mL of 50 mg L-1 cephalexin solutions with 0.050 M Na2SO4 have been studied with 1.0 g L-1 chalcopyrite at 50 mA cm-2. Comparative homogeneous EF and PEF with dissolved Fe2+ and Cu2+ catalysts were also performed. The HPEF process was the most effective process, which can be mainly explained by the larger production of homogeneous and heterogeneous ●OH and the photodegradation of the complexes of iron with organics. The effect of applied current and catalyst concentration on HPEF performance was assessed. Recycling experiments showed a long-term stability of chalcopyrite. Seven initial aromatics and six cyclic by-products of cephalexin were identified, and a plausible degradation route that also includes five final carboxylic acids is proposed. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2020.140154 | - |
dc.relation.ispartof | Science of the Total Environment, 2020, vol. 740, p. 140154 | - |
dc.relation.uri | https://doi.org/10.1016/j.scitotenv.2020.140154 | - |
dc.rights | cc-by-nc-nd (c) Elsevier B.V., 2020 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es | - |
dc.source | Articles publicats en revistes (Ciència dels Materials i Química Física) | - |
dc.subject.classification | Antibiòtics | - |
dc.subject.classification | Depuració d'aigües residuals | - |
dc.subject.classification | Oxidació electroquímica | - |
dc.subject.other | Antibiotics | - |
dc.subject.other | Purification of sewage | - |
dc.subject.other | Electrolytic oxidation | - |
dc.title | Treatment of antibiotic cephalexin by heterogeneous electrochemical Fenton-based processes using chalcopyrite as sustainable catalyst | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 702264 | - |
dc.date.updated | 2020-07-01T13:11:49Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
702264.pdf | 877.31 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License