2-Mercaptoimidazole covalently bonded to a silica gel surface for the selective separation of mercury(II) from an aqueous solution

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dc.contributor.authorDias, N. L.
dc.contributor.authorGushikem, Y.
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:28:04Z
dc.date.available2014-05-20T15:28:04Z
dc.date.issued1997-01-01
dc.description.abstractSilica gel with a specific surface area of 365 m(2).g(-1) and an average pore diameter of 60 Angstrom was chemically modified with 2-mercaptoimidazole. The degree of functionalization of the covalently attached molecule, (drop SiO)(3)(CH2)(3) - MI, where MI is the 2-mercaptoimidazole bound to the silica surface by a propyl group, was 0.58 mmolg.(-1). In individual metal adsorption experiments from aqueous solutions by the batch procedure, the affinity order was Hg(II)much greater than Cd-II > Cu-II approximate to Zn-II approximate to Pb-II > Mn-II at solution pHs between 4 and 7. Due to the high affinity by the sulfur atom, Hg-II is strongly bound to the functional groups. When solution containing a mixture of Hg-II, Cd-II, Cu-II, Zn-II, Pb-II, and Mn-II ions was passed through a column packed with the adsorbent, Hg-II was the only one whose adsorption and elution was not affected by the presence of other ions.en
dc.description.affiliationUNICAMP,INST QUIM,BR-13083970 CAMPINAS,SP,BRAZIL
dc.description.affiliationUNESP ILHA SOLTEIRA,DEPT CIENCIAS,BR-15378000 ILHA SOLTEIRA,SP,BRAZIL
dc.description.affiliationUnespUNESP ILHA SOLTEIRA,DEPT CIENCIAS,BR-15378000 ILHA SOLTEIRA,SP,BRAZIL
dc.format.extent2535-2545
dc.identifierhttp://dx.doi.org/10.1080/01496399708000784
dc.identifier.citationSeparation Science and Technology. New York: Marcel Dekker Inc., v. 32, n. 15, p. 2535-2545, 1997.
dc.identifier.doi10.1080/01496399708000784
dc.identifier.issn0149-6395
dc.identifier.urihttp://hdl.handle.net/11449/37967
dc.identifier.wosWOS:A1997YD48900008
dc.language.isoeng
dc.publisherMarcel Dekker Inc
dc.relation.ispartofSeparation Science and Technology
dc.relation.ispartofjcr1.200
dc.relation.ispartofsjr0,372
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHg-II separationpt
dc.subject2-mercaptoimidazole modified silica gelpt
dc.subject2-mercaptoimidazole silica gel for Hg-II separationpt
dc.subjectchemically modified silica gelpt
dc.subjectHg-II selective adsorptionpt
dc.title2-Mercaptoimidazole covalently bonded to a silica gel surface for the selective separation of mercury(II) from an aqueous solutionen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderMarcel Dekker Inc

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