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http://hdl.handle.net/2445/153302
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DC Field | Value | Language |
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dc.contributor.author | Ridruejo, Carlota | - |
dc.contributor.author | Salazar, Claudio | - |
dc.contributor.author | Cabot Julià, Pere-Lluís | - |
dc.contributor.author | Centellas Masuet, Francesc A. | - |
dc.contributor.author | Brillas, Enric | - |
dc.contributor.author | Sirés Sadornil, Ignacio | - |
dc.date.accessioned | 2020-03-23T09:31:30Z | - |
dc.date.available | 2020-03-23T09:31:30Z | - |
dc.date.issued | 2017-05-03 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/2445/153302 | - |
dc.description.abstract | The degradation of 150 mL of 0.561 mM tetracaine hydrochloride at pH 3.0 by electrochemical oxidation with electrogenerated H2O2 (EO-H2O2) has been studied at a low current density of 33.3 mA cm(2) in three different matrices: 0.050 M Na2SO4, real urban wastewater and a simulated matrix mimicking its electrolyte composition. Comparative trials were performed in an undivided cell with a 3 cm(2) borondoped diamond (BDD), Pt, IrO2-based or RuO2-based anode and a 3 cm(2) air-diffusion cathode that allowed continuous H2O2 electrogeneration. In 0.050 M Na2SO4, much faster and overall removal of tetracaine occurred using BDD because of the large oxidation ability of BDD((OH)-O-center dot) formed from anodic water oxidation. In either simulated matrix or real wastewater, the RuO2-based anode yielded the quickest tetracaine decay due to a large production of active chlorine from anodic oxidation of Cl . For the mineralization of the organic matter content, the BDD/air-diffusion cell was the best choice in all aqueous matrices, always reaching more than 50% of total organic carbon abatement after 360 min of electrolysis, as expected if BDD((OH)-O-center dot) mineralizes more easily the chloroderivatives formed from tetracaine oxidation in the presence of active chlorine. The initial N of tetracaine was partly transformed into NO3, although the total nitrogen of all solutions always decayed by the release of volatile by-products. In the Cl - containing matrices, significant amounts of ClO3 and ClO4 were obtained using BDD, whereas active chlorine was much largely produced using the RuO2-based anode. Five aromatic by-products, one of them being chlorinated, along with low concentrations of oxalic acid were identified. The change in toxicity during EO-H2O2 with BDD in the sulfate and simulated matrices was also assessed. (C) 2017 Elsevier B.V. All rights reserved. | - |
dc.format.extent | 9 p. | - |
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.cej.2017.04.139 | - |
dc.relation.ispartof | Chemical Engineering Journal, 2017, vol. 326, p. 811-819 | - |
dc.relation.uri | https://doi.org/10.1016/j.cej.2017.04.139 | - |
dc.rights | cc-by-nc-nd (c) Elsevier B.V., 2017 | - |
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 | Depuració d'aigües residuals | - |
dc.subject.other | Electrolytic oxidation | - |
dc.subject.other | Purification of sewage | - |
dc.title | Electrochemical oxidation of anesthetic tetracaine in aqueous medium. Influence of the anode and matrix composition | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 675128 | - |
dc.date.updated | 2020-03-23T09:31:30Z | - |
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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File | Description | Size | Format | |
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675128.pdf | 1.26 MB | Adobe PDF | View/Open |
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