Destruction of EDTA using Fenton and photo-Fenton-like reactions under UV-A irradiation

dc.creatorGhiselli, G
dc.creatorJardim, WF
dc.creatorLitter, MI
dc.creatorMansilla, HD
dc.date2004
dc.dateSEP 1
dc.date2014-11-16T15:31:13Z
dc.date2015-11-26T16:23:44Z
dc.date2014-11-16T15:31:13Z
dc.date2015-11-26T16:23:44Z
dc.date.accessioned2018-03-28T23:04:50Z
dc.date.available2018-03-28T23:04:50Z
dc.identifierJournal Of Photochemistry And Photobiology A-chemistry. Elsevier Science Sa, v. 167, n. 1, n. 59, n. 67, 2004.
dc.identifier1010-6030
dc.identifierWOS:000223520700008
dc.identifier10.1016/j.jphotochem.2004.02.005
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/61277
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/61277
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/61277
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1268298
dc.descriptionDegradation experiments using 5 mmol/l ethylenediaminetetraacetic acid (EDTA) solutions at pH 3 were performed in the presence of H(2)O(2) and metals such as Fe(2+), Fe(3+), Cu(2+) and mixtures of Fe(2+)/Cu(2+) and Fe(3+)/Cu(2+) under UV-A irradiation (366 nm)-photo-Fenton and photo-Fenton-like reactions-at different metal/EDTA concentration ratios in order to determine the best conditions for EDTA photochemical removal. Analogous dark reactions were performed for comparison. The reaction course was monitored by both EDTA and TOC determinations. Hydrogen peroxide demand was also evaluated in all cases. In terms of TOC removal, photo-Fenton-like reactions were remarkably more efficient than the analogous Fenton-like reactions. When EDTA was monitored, Fenton-like reactions showed variable performances, being more efficient with EDTA:Fe(2+) and EDTA:Fe(3+) ratios of 1:1. However, in these both cases, reaction rates were lower than the ones obtained under irradiation. Total mineralization ranged from 31% (Cu(2+) system) to 92% (Fe(2+), Fe(3+), Fe(3+) + Cu(2+) and Fe(2+) + Cu(2+) systems) after 4 h of irradiation. Percentage of TOC removal was higher in the presence of iron because some photoactive intermediates were probably formed during EDTA degradation. (C) 2004 Elsevier B.V. All rights reserved.
dc.description167
dc.description1
dc.description59
dc.description67
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationJournal Of Photochemistry And Photobiology A-chemistry
dc.relationJ. Photochem. Photobiol. A-Chem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectadvanced oxidation technologies
dc.subjectEDTA destruction
dc.subjectiron
dc.subjectcopper
dc.subjectFenton
dc.subjectphoto-Fenton
dc.subjectWater-treatment Process
dc.subjectHydrogen-peroxide
dc.subjectChemical Oxidation
dc.subjectUv/h2o2 Process
dc.subjectHeterogeneous Photocatalysis
dc.subjectPhotochemical Degradation
dc.subjectHydroxyl Radicals
dc.subjectIlluminated Tio2
dc.subjectAqueous-solution
dc.subjectKinetics
dc.titleDestruction of EDTA using Fenton and photo-Fenton-like reactions under UV-A irradiation
dc.typeArtículos de revistas


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