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Sílica quimicamente modificada com os grupos para-anisidina, para-fenitidina e para-fenilenodiamina usada como adsorvente para Pb2+, Cu2+, Cd2+ e Ni2+ em soluções aquosa e etanólica

dc.contributor.authorVilar, Rossana Borges Cavalcantept_BR
dc.contributor.authorJesus, Alexandre dept_BR
dc.contributor.authorBenvenutti, Edilson Valmirpt_BR
dc.contributor.authorSilva, Marcia Messias dapt_BR
dc.date.accessioned2013-07-05T01:43:52Zpt_BR
dc.date.issued2008pt_BR
dc.identifier.issn0100-4042pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/73113pt_BR
dc.description.abstractSilica gel was chemically modified with the aromatic amines p-anisidine, p-phenytidine and p-phenylenediamine, using grafting reactions. The resulting modified silicas were characterized by infrared spectroscopy and N2 adsorption/desorption isotherms. The organic groups were covalently immobilized in a monolayer form. These modified silicas were investigated as adsorbents for Pb2+, Cu2+, Cd2+ and Ni2+ in aqueous and ethanol solutions. In a general way, the adsorption capacity values for all adsorbents presented the following sequence: Pb2+ >> Cu2+~= Cd2+ ~= Ni2+. Adsorption studies for all adsorbents, in competitive medium, showed better selectivity for Cu2+ and Pb2+ in aqueous medium and for Pb2+ in ethanol solution. Desorption studies were carried out using HCl and HNO3 as eluents.en
dc.format.mimetypeapplication/pdf
dc.language.isoporpt_BR
dc.relation.ispartofQuímica nova. São Paulo. Vol. 31, n. 2 (mar. 2008), p. 285-289pt_BR
dc.rightsOpen Accessen
dc.subjectSilica organofuncionalizadapt_BR
dc.subjectOrganofunctionalized silicaen
dc.subjectAdsorçãopt_BR
dc.subjectAdsorptionen
dc.subjectMetaispt_BR
dc.subjectMetalsen
dc.titleSílica quimicamente modificada com os grupos para-anisidina, para-fenitidina e para-fenilenodiamina usada como adsorvente para Pb2+, Cu2+, Cd2+ e Ni2+ em soluções aquosa e etanólicapt_BR
dc.title.alternativeSilica chemically modified with p-anisidine, p-phenytidine and p-phenylenediamine groups used as adsorbent for pb2+, cu2+, cd2+ and ni2+ in aqueous and ethanol solutions en
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000630891pt_BR
dc.type.originNacionalpt_BR


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