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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDias, N. L.
dc.creatorGushikem, Y.
dc.date2014-05-20T15:28:04Z
dc.date2016-10-25T18:03:03Z
dc.date2014-05-20T15:28:04Z
dc.date2016-10-25T18:03:03Z
dc.date1997-01-01
dc.date.accessioned2017-04-06T00:05:25Z
dc.date.available2017-04-06T00:05:25Z
dc.identifierSeparation Science and Technology. New York: Marcel Dekker Inc., v. 32, n. 15, p. 2535-2545, 1997.
dc.identifier0149-6395
dc.identifierhttp://hdl.handle.net/11449/37967
dc.identifierhttp://acervodigital.unesp.br/handle/11449/37967
dc.identifier10.1080/01496399708000784
dc.identifierWOS:A1997YD48900008
dc.identifierhttp://dx.doi.org/10.1080/01496399708000784
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/881166
dc.descriptionSilica 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.
dc.languageeng
dc.publisherMarcel Dekker Inc
dc.relationSeparation Science and Technology
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectHg-II separation
dc.subject2-mercaptoimidazole modified silica gel
dc.subject2-mercaptoimidazole silica gel for Hg-II separation
dc.subjectchemically modified silica gel
dc.subjectHg-II selective adsorption
dc.title2-Mercaptoimidazole covalently bonded to a silica gel surface for the selective separation of mercury(II) from an aqueous solution
dc.typeOtro


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