Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/152814
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Gozzi, Fábio | - |
dc.contributor.author | Sirés Sadornil, Ignacio | - |
dc.contributor.author | De Oliveira, Silvio César | - |
dc.contributor.author | Machulek Jr., Amílcar | - |
dc.contributor.author | Brillas, Enric | - |
dc.date.accessioned | 2020-03-17T11:48:33Z | - |
dc.date.available | 2020-03-17T11:48:33Z | - |
dc.date.issued | 2018-02-12 | - |
dc.identifier.issn | 0045-6535 | - |
dc.identifier.uri | http://hdl.handle.net/2445/152814 | - |
dc.description.abstract | This study describes the performance of electro-Fenton (EF) and photoelectro-Fenton (PEF) processes to degrade the herbicide tebuthiuron (TBH) in 0.050 M Na2SO4 at pH = 3.0. Experiments were performed in an undivided cell equipped with a boron-doped diamond (BDD) or Pt anode and an air-diffusion cathode that produces H2O2. Physisorbed hydroxyl radicals (M(●OH)) generated from water oxidation at the anode and/or free ●OH formed from Fenton's reaction acted as main oxidants. All processes became much more effective using a BDD anode because of the higher oxidation power of BDD(●OH). Sulfate and nitrate were the predominant ions released during TBH destruction. In both, EF and PEF treatments, two distinct kinetic regimes were observed, the first one corresponding to the oxidation of free TBH by ●OH and the second one to that of the Fe(III)-TBH complex by M(●OH). The effect of Fe2+ and TBH concentrations on the kinetics of both regions has been examined. Moreover, a poor mineralization was reached with Pt anode, whereas almost total mineralization was attained by EF and PEF with BDD. Both processes showed analogous mineralization rates because the intermediates produced could not be photodegraded by UVA light. Gas chromatography-mass spectrometry analysis of electrolyzed solutions revealed the generation of eight heteroaromatics along with 1,3-dimethylurea, which have been included in a reaction pathway proposed for the initial degradation of TBH. | - |
dc.format.extent | 9 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier Ltd | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1016/j.chemosphere.2018.02.060 | - |
dc.relation.ispartof | Chemosphere, 2018, vol. 199, p. 709-717 | - |
dc.relation.uri | https://doi.org/10.1016/j.chemosphere.2018.02.060 | - |
dc.rights | cc-by-nc-nd (c) Elsevier Ltd, 2018 | - |
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 | Oxidació electroquímica | - |
dc.subject.classification | Complexos metàl·lics | - |
dc.subject.classification | Acer | - |
dc.subject.other | Electrolytic oxidation | - |
dc.subject.other | Metal complexes | - |
dc.subject.other | Steel | - |
dc.title | Influence of chelation on the Fenton-based electrochemical degradation of herbicide tebuthiuron | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 677394 | - |
dc.date.updated | 2020-03-17T11:48:33Z | - |
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 | |
---|---|---|---|---|
677394.pdf | 1.36 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License