Photodegradation of dichloroacetic acid and 2,4-dichlorophenol by ferrioxalate/H2O2 system

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dc.contributor.authorPupo Nogueira, Raquel F. [UNESP]
dc.contributor.authorGuimarães, José Roberto
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2014-05-27T11:19:53Z
dc.date.available2014-05-27T11:19:53Z
dc.date.issued2000-02-15
dc.description.abstractThe photo-Fenton process using potassium ferrioxalate as a mediator in the photodegradation reaction of organochloride compounds in an aqueous medium was investigated. The influence of parameters such as hydrogen peroxide and ferrioxalate concentrations and initial pH, was evaluated using dichloroacetic acid (DCA) as a model compound under black-light lamp irradiation. An upflow annular photoreactor, operating in a single pass or recirculating mode was used during photodegradation experiments with artificial light. The extent of the release of chloride ions was used to evaluate the photodegradation reaction. The optimum pH range observed was 2.5-2.8. The efficiency of DCA dechlorination increased with increasing concentrations of H2O2 and potassium ferrioxalate, reaching a plateau after the addition of 6 and 1.5 mmol/L of those reagents, respectively. The total organic carbon (TOC) content in DCA and 2,4-dichlorophenol (DCP) solutions was compared with the chloride released after photodegradation. The influence of natural solar light intensity, measured at 365 nm, was evaluated for the dechlorination of DCA on typical summer's days showing a linear dependency. The photodegradation of DCA using black-light lamp and solar irradiation was compared.en
dc.description.affiliationInstitute of Chemistry of Araraquara Univ. Estadual Paulista-UNESP, C., Araraquara
dc.description.affiliationFaculty of Civil Engineering Univ. Estadual Campinas-UNICAMP, C., Campinas
dc.description.affiliationUnespInstitute of Chemistry of Araraquara Univ. Estadual Paulista-UNESP, C., Araraquara
dc.format.extent895-901
dc.identifierhttp://dx.doi.org/10.1016/S0043-1354(99)00193-1
dc.identifier.citationWater Research, v. 34, n. 3, p. 895-901, 2000.
dc.identifier.doi10.1016/S0043-1354(99)00193-1
dc.identifier.issn0043-1354
dc.identifier.scopus2-s2.0-0344146615
dc.identifier.urihttp://hdl.handle.net/11449/66102
dc.identifier.wosWOS:000084822200021
dc.language.isoeng
dc.relation.ispartofWater Research
dc.relation.ispartofjcr7.051
dc.relation.ispartofsjr2,601
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subject2,4- dichlorophenol
dc.subjectDichloroacetic acid
dc.subjectFenton's reaction
dc.subjectFerrioxalate
dc.subjectPhotodegradation
dc.subjectDechlorination
dc.subjectDichlorophenol
dc.subjectPhotoreactors
dc.subjectTotal organic carbon (TOC)
dc.subjectAcetic acid
dc.subjectChemical reactors
dc.subjectChlorine compounds
dc.subjectComposition effects
dc.subjectDehalogenation
dc.subjectHydrogen peroxide
dc.subjectIron compounds
dc.subjectpH effects
dc.subjectPhenols
dc.subjectPhotolysis
dc.subjectSolar radiation
dc.subjectWater treatment
dc.subject2,4 dichlorophenol
dc.subjectdichloroacetic acid
dc.subjecthydrogen peroxide
dc.subjectoxalic acid derivative
dc.subjectdechlorination
dc.subjectoxidation
dc.subjectphotodegradation
dc.subjectpriority journal
dc.subjectreaction analysis
dc.subjectsunlight
dc.titlePhotodegradation of dichloroacetic acid and 2,4-dichlorophenol by ferrioxalate/H2O2 systemen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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