Logo do repositório
 

Adsorption/desorption of arsenic by tropical peat: influence of organic matter, iron and aluminium

dc.contributor.authorOliveira, Lilian Karla de [UNESP]
dc.contributor.authorMelo, Camila Almeida [UNESP]
dc.contributor.authorGoveia, Danielle [UNESP]
dc.contributor.authorLobo, Fabiana Aparecida
dc.contributor.authorArmienta Hernandez, Maria Aurora
dc.contributor.authorFraceto, Leonardo Fernandes [UNESP]
dc.contributor.authorRosa, Andre Henrique [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Ouro Preto
dc.contributor.institutionUniv Nacl Autonoma Mexico
dc.date.accessioned2015-03-18T15:54:34Z
dc.date.available2015-03-18T15:54:34Z
dc.date.issued2015-01-17
dc.description.abstractThe objective of this work was to investigate the interaction of arsenic species (As(III) and As(V)) with tropical peat. Peat samples collected in Brazil were characterized using elemental analysis and C-13 NMR. Adsorption experiments were performed using different concentrations of As with peat in natura and enriched with Fe or Al, at three different pH levels. Peat samples, in natura or enriched with metals, were analysed before and after adsorption processes using Fourier transform infrared spectroscopy (FTIR) spectroscopy. The adsorption kinetics was evaluated, and the data were fitted using the Langmuir and Freundlich models. The results showed that interaction between As and peat was dependent on the levels of organic matter (OM) and the metals (Fe and Al). As(III) was not adsorbed by in natura peat or Al-enriched peat, although small amounts of As(III) were adsorbed by Fe-enriched peat. Adsorption of As(V) by the different peat samples ranged from 21.3 to 52.7 mu gg(-1). The best fit to the results was obtained using the pseudo-second-order kinetic model, and the adsorption of As(V) could be described by the Freundlich isotherm model. The results showed that Fe-enriched peat was most effective in immobilizing As(V). FTIR analysis revealed the formation of ternary complexes involving As(V) and peat enriched with metals, suggesting that As(V) was associated with Al or Fe-OM complexes by metal bridging.en
dc.description.affiliationSao Paulo State Univ UNESP, Inst Chem, BR-18087180 Araraquara, SP, Brazil
dc.description.affiliationSao Paulo State Univ UNESP, Dept Environm Engn, BR-18087180 Sorocaba, SP, Brazil
dc.description.affiliationUniv Fed Ouro Preto, Dept Chem, BR-35000000 Ouro Preto, MG, Brazil
dc.description.affiliationUniv Nacl Autonoma Mexico, Inst Geophys, Mexico City 04510, DF, Mexico
dc.description.affiliationUnespSao Paulo State Univ UNESP, Inst Chem, BR-18087180 Araraquara, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ UNESP, Dept Environm Engn, BR-18087180 Sorocaba, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConsejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico)
dc.description.sponsorshipIdCNPq: 2010/12210-1
dc.description.sponsorshipIdCAPES: BEX 18302-12-2
dc.format.extent149-159
dc.identifierhttp://dx.doi.org/10.1080/09593330.2014.939999
dc.identifier.citationEnvironmental Technology. Abingdon: Taylor & Francis Ltd, v. 36, n. 2, p. 149-159, 2015.
dc.identifier.doi10.1080/09593330.2014.939999
dc.identifier.issn0959-3330
dc.identifier.orcid0000-0002-2042-018X
dc.identifier.urihttp://hdl.handle.net/11449/116950
dc.identifier.wosWOS:000345142500002
dc.language.isoeng
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofEnvironmental Technology
dc.relation.ispartofjcr1.666
dc.relation.ispartofsjr0,503
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectironen
dc.subjectorganic matteren
dc.subjectpeaten
dc.subjectaluminiumen
dc.subjectarsenicen
dc.titleAdsorption/desorption of arsenic by tropical peat: influence of organic matter, iron and aluminiumen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderTaylor & Francis Ltd
dspace.entity.typePublication
unesp.author.lattes5228846314663888[7]
unesp.author.orcid0000-0002-2042-018X[7]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Ciência e Tecnologia, Sorocabapt
unesp.departmentEngenharia Ambiental - ICTSpt

Arquivos