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dc.contributor.authorBorràs Cristòfol, Núria
dc.contributor.authorArias Tejerina, Concha
dc.contributor.authorOliver Pujol, Ramon
dc.contributor.authorBrillas Coso, Enric
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2017-07-07T09:28:47Z
dc.date.issued2011-09-16
dc.identifier.citationBorras, N., Arias, C., Oliver, R., Brillas, E. Mineralization of desmetryne by electrochemical advanced oxidation processes using a boron-doped diamond anode and an oxygen-diffusion cathode. "Chemosphere", 16 Setembre 2011, vol. 85, p. 1167-1175.
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/2117/106227
dc.description.abstractThe mineralization of acidic aqueous solutions of the herbicide desmetryne has been studied by electrochemical advanced oxidation processes (EAOPs) such as anodic oxidation with electrogenerated H2O2 (AO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF) with UVA light. Electrolyses were conducted in an open and cylindrical cell with a boron-doped diamond (BDD) anode and an O2-diffusion cathode for H2O2 generation. The main oxidizing species are OH radicals formed at the BDD surface in all treatments and in the bulk from Fenton’s reaction between added Fe2+ and electrogenerated H2O2 in EF and PEF. A poor mineralization was attained using AO-H2O2 by the slow oxidation of persistent by-products with OH at the BDD surface. The synergistic action of OH in the bulk enhanced the degradation rate in EF, although almost total mineralization was only achieved in PEF due to the additional OH generation and photolysis of intermediates by UVA irradiation. The effect of current, pH and herbicide concentration on the mineralization degree and mineralization current efficiency of each EAOP was examined. Desmetryne decay always followed a pseudo first-order kinetics, being more rapidly destroyed in the sequence AO-H2O2 < EF < PEF. In all EAOPs, ammeline and cyanuric acid were identified as persistent heteroaromatic by-products and oxamic and formic acids were detected as generated carboxylic acids. The generation of cyanuric acid mainly by oxidation with OH at the BDD surface is the predominant path for desmetryne degradation. The initial nitrogen of desmetryne yielded NO 3 ion in low proportion and NHþ4 ion in much lesser extent, suggesting that its major part was lost as volatile N-derivatives.
dc.format.extent9 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshHydrogen peroxide
dc.subject.otherAnodic oxidation with electrogenerated hydrogen peroxide Boron-doped diamond Desmetryne Electro-Fenton Photoelectro-Fenton
dc.titleMineralization of desmetryne by electrochemical advanced oxidation processes using a boron-doped diamond anode and an oxygen-diffusion cathode
dc.typeArticle
dc.subject.lemacPeròxids
dc.contributor.groupUniversitat Politècnica de Catalunya. IMEM - Innovació, Modelització i Enginyeria en (BIO) Materials
dc.identifier.doi10.1016/j.chemosphere.2011.09.008
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac21111107
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorBorras, N.; Arias, C.; Oliver, R.; Brillas, E.
local.citation.publicationNameChemosphere
local.citation.volume85
local.citation.startingPage1167
local.citation.endingPage1175


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