Calorimetric investigation of metal ion adsorption on 3-glycidoxypropyltrimethylsiloxane plus propane-1,3-diamine immobilized on silica gel

dc.creatorSales, JAA
dc.creatorAiroldi, C
dc.date2005
dc.dateMAR
dc.date2014-11-14T16:04:18Z
dc.date2015-11-26T17:15:43Z
dc.date2014-11-14T16:04:18Z
dc.date2015-11-26T17:15:43Z
dc.date.accessioned2018-03-29T00:03:56Z
dc.date.available2018-03-29T00:03:56Z
dc.identifierThermochimica Acta. Elsevier Science Bv, v. 427, n. 41671, n. 77, n. 83, 2005.
dc.identifier0040-6031
dc.identifierWOS:000227196900012
dc.identifier10.1016/j.tca.2004.08.015
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78397
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78397
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78397
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1282112
dc.descriptionThe silylant precursor agent 3-glycidoxypropyltrimethoxysilane was covalently anchored onto a silica gel surface followed by propane-1,3-diamine molecule incorporation using a heterogeneous route (SiHT). On another series, the precursor agent was previously reacted with diamine to give the silylant agent in homogeneous condition, before immobilization (SiHM). The degrees of immobilization were 0.80 and 1.53 mmol g(-1) for SiHT and SiHM, respectively. Both grafting surfaces were employed to extract the divalent cations nickel, copper, cobalt and zinc from aqueous solutions. This cation/nitrogen interactive process was calorimetrically followed to give exothermic enthalpy, negative free Gibbs energy and positive entropy values. These favorable thermodynamic data are more pronounced for copper on both surfaces, with a higher tendency for SiHM, due to the larger amount of available nitrogen atoms in the pendant chain covalently attached to the inorganic silica backbone. (C) 2004 Elsevier B.V. All rights reserved.
dc.description427
dc.description41671
dc.description77
dc.description83
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationThermochimica Acta
dc.relationThermochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectsilica
dc.subjectpropane-1
dc.subject3-diamine
dc.subjectimmobilization
dc.subjectadsorption
dc.subjectthermodynamic
dc.subjectThermodynamic Data
dc.subjectDivalent-cations
dc.subjectAqueous-solution
dc.subjectSolid/liquid Interface
dc.subjectHeterogeneous Routes
dc.subjectSilylant Agent
dc.subjectSurface
dc.subjectEthylenimine
dc.subjectSeparation
dc.subjectCatalysts
dc.titleCalorimetric investigation of metal ion adsorption on 3-glycidoxypropyltrimethylsiloxane plus propane-1,3-diamine immobilized on silica gel
dc.typeArtículos de revistas


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