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Publicação:
2,4-Dichlorophenoxyacetic acid (2,4-D) degradation promoted by nanoparticulate zerovalent iron (nZVI) in aerobic suspensions

dc.contributor.authorCorreia de Velosa, Adriana [UNESP]
dc.contributor.authorPupo Nogueira, Raquel F. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:33Z
dc.date.available2014-05-27T11:29:33Z
dc.date.issued2013-05-30
dc.description.abstractReactive species generated by Fe0 oxidation promoted by O2 (catalyzed or not by ligands) are able to degrade contaminant compounds like the herbicide 2,4-dichlorophenoxyacetic acid. The degradation of 2,4-D was influenced by the concentrations of zero valent iron (ZVI) and different ligands, as well as by pH. In the absence of ligands, the highest 2,4-D degradation rate was obtained at pH 3, while the highest percentage degradation (50%) was achieved at pH 5 after 120 min of reaction. Among the ligands studied (DTPA, EDTA, glycine, oxalate, and citrate), only ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) significantly enhanced oxidation of 2,4-D. This increase in oxidation was observed at all pH values tested (including neutral to alkaline conditions), indicating the feasibility of the technique for treatment of contaminated water. In the presence of EDTA, the oxidation rate was greater at pH 3 than at pH 5 or 7. Increasing the EDTA concentration increased the rate and percentage of 2,4-D degradation, however increasing the Fe0 concentration resulted in the opposite behavior. It was found that degradation of EDTA and 2,4-D occurred simultaneously, and that the new methodology avoided any 2,4-D removal by adsorption/coprecipitation. © 2013 Elsevier Ltd.en
dc.description.affiliationInstituto de Química de Araraquara Universidade Estadual Paulista (UNESP), CP 355, 14801-970 Araraquara, SP
dc.description.affiliationUnespInstituto de Química de Araraquara Universidade Estadual Paulista (UNESP), CP 355, 14801-970 Araraquara, SP
dc.format.extent72-79
dc.identifierhttp://dx.doi.org/10.1016/j.jenvman.2013.02.031
dc.identifier.citationJournal of Environmental Management, v. 121, p. 72-79.
dc.identifier.doi10.1016/j.jenvman.2013.02.031
dc.identifier.issn0301-4797
dc.identifier.issn1095-8630
dc.identifier.scopus2-s2.0-84875619890
dc.identifier.urihttp://hdl.handle.net/11449/75458
dc.identifier.wosWOS:000318388400008
dc.language.isoeng
dc.relation.ispartofJournal of Environmental Management
dc.relation.ispartofjcr4.005
dc.relation.ispartofsjr1,161
dc.relation.ispartofsjr1,161
dc.rights.accessRightsAcesso restritopt
dc.sourceScopus
dc.subject2,4-D
dc.subjectDTPA
dc.subjectEDTA
dc.subjectMetallic iron
dc.subjectNanoparticles
dc.subject2,4 dichlorophenoxyacetic acid
dc.subjectcitric acid
dc.subjectedetic acid
dc.subjectglycine
dc.subjectiron derivative
dc.subjectnanoparticle
dc.subjectoxalic acid
dc.subjectpentetic acid
dc.subjectunclassified drug
dc.subjectzero valent iron
dc.subjectacetic acid
dc.subjectadsorption
dc.subjectalkalinity
dc.subjectbiodegradation
dc.subjectcatalysis
dc.subjectconcentration (composition)
dc.subjectligand
dc.subjectoxic conditions
dc.subjectoxidation
dc.subjectoxygen
dc.subjectparticulate matter
dc.subjectpH
dc.subjectpollutant removal
dc.subjectpollution effect
dc.subjectprecipitation (chemistry)
dc.subjectwater treatment
dc.subjectacidity
dc.subjectconcentration (parameters)
dc.subjectcontrolled study
dc.subjectdegradation
dc.subjectdegradation kinetics
dc.subjectdissolution
dc.subjectprecipitation
dc.subjectreaction time
dc.subjectwater contamination
dc.title2,4-Dichlorophenoxyacetic acid (2,4-D) degradation promoted by nanoparticulate zerovalent iron (nZVI) in aerobic suspensionsen
dc.typeArtigopt
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentQuímica Analítica - IQARpt

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