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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleAdsorption of thorium cation on modified clays MTTZ derivativept_BR
dc.contributor.authorGuerra, DLpt_BR
dc.contributor.authorViana, RRpt_BR
dc.contributor.authorAiroldi, Cpt_BR
unicamp.author.emaildlguerra@iqm.unicamp.brpt_BR
unicamp.authorGuerra, Denis L. Airoldi, Claudio Univ Estadual Campinas, Inst Chem, BR-13084971 Sao Paulo, Brazilpt_BR
unicamp.authorViana, Rubia R. Univ Fed Matogrosso, UFMT, Ctr Recursos Minerais, BR-68060900 Cuiaba, Matogrosso, Brazilpt_BR
dc.subjectDiquitept_BR
dc.subjectBentonitept_BR
dc.subjectThoriumpt_BR
dc.subjectAdsorptionpt_BR
dc.subjectThermodynamicpt_BR
dc.subject.wosSilica-gelpt_BR
dc.subject.wosMesoporous Silicapt_BR
dc.subject.wosAcid Activationpt_BR
dc.subject.wosIonic-strengthpt_BR
dc.subject.wosContact Timept_BR
dc.subject.wosRemovalpt_BR
dc.subject.wosSorptionpt_BR
dc.subject.wosIntercalationpt_BR
dc.subject.wosAdsorbentpt_BR
dc.subject.wosTh(iv)pt_BR
dc.description.abstractDiquite (D) and bentonite (B) mineral samples from the Amazon region, Brazil. were modified by MTTZ derivative (5-mercapto-1-methyltetrazole) using heterogeneous route. These materials were characterized by textural and elemental analysis, transmission electron microscopy (TEM), power X-ray diffraction and (13)C NMR spectroscopy. The chemically modified clay (D(MTTZ) and B(MTTZ)) samples showed modification of its physical-chemical properties including: specific area 41.4 (B) to 398.5 m(2) g(-1) (B(MTTZ)) and 25.0 (D) to 178.8 m(2) g(-1) (D(MTTZ)). The adsorption experiments performed under batch process with Th(IV) concentration, pH and contact time as variables. The ability of these materials to remove thorium from aqueous solution was followed by a series of adsorption isotherms adjusted to a Sips equation at room temperature and pH 2.0, with variable concentration of Th(IV). The maximum number of moles adsorbed was determined to be 10.45 x 10(-2) and 12.76 x 10(-2) mmol g(-1) for D(MTTZ) and B(MTTZ), respectively. The energetic effects (Delta(int)H degrees, Delta(int)G degrees and Delta(int)S degrees) caused by thorium cation adsorption were determined through calorimetric titrations. (C) 2009 Published by Elsevier B.V.pt
dc.relation.ispartofJournal Of Hazardous Materialspt_BR
dc.relation.ispartofabbreviationJ. Hazard. Mater.pt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryHolandapt_BR
dc.publisherElsevier Science Bvpt_BR
dc.date.issued2009pt_BR
dc.date.monthofcirculationSEP 15pt_BR
dc.identifier.citationJournal Of Hazardous Materials. Elsevier Science Bv, v. 168, n. 41700, n. 1504, n. 1511, 2009.pt_BR
dc.language.isoenpt_BR
dc.description.volume168pt_BR
dc.description.issuenumber41700pt_BR
dc.description.firstpage1504pt_BR
dc.description.lastpage1511pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policypt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn0304-3894pt_BR
dc.identifier.wosidWOS:000268200700133pt_BR
dc.identifier.doi10.1016/j.jhazmat.2009.03.034pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.date.available2014-11-14T11:51:58Z
dc.date.available2015-11-26T17:14:48Z-
dc.date.accessioned2014-11-14T11:51:58Z
dc.date.accessioned2015-11-26T17:14:48Z-
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dc.description.provenanceMade available in DSpace on 2015-11-26T17:14:48Z (GMT). No. of bitstreams: 2 WOS000268200700133.pdf: 961196 bytes, checksum: ff4e7b5198404cafea788b09885c2e59 (MD5) WOS000268200700133.pdf.txt: 38650 bytes, checksum: f808f9715c007022fb630a372a708967 (MD5) Previous issue date: 2009en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/76915pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/76915
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/76915-
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