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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.author | Vilar, Rossana Borges Cavalcante | pt_BR |
dc.contributor.author | Jesus, Alexandre de | pt_BR |
dc.contributor.author | Benvenutti, Edilson Valmir | pt_BR |
dc.contributor.author | Silva, Marcia Messias da | pt_BR |
dc.date.accessioned | 2013-07-05T01:43:52Z | pt_BR |
dc.date.issued | 2008 | pt_BR |
dc.identifier.issn | 0100-4042 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/73113 | pt_BR |
dc.description.abstract | Silica 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.mimetype | application/pdf | |
dc.language.iso | por | pt_BR |
dc.relation.ispartof | Química nova. São Paulo. Vol. 31, n. 2 (mar. 2008), p. 285-289 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Silica organofuncionalizada | pt_BR |
dc.subject | Organofunctionalized silica | en |
dc.subject | Adsorção | pt_BR |
dc.subject | Adsorption | en |
dc.subject | Metais | pt_BR |
dc.subject | Metals | en |
dc.title | 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 | pt_BR |
dc.title.alternative | Silica 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.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000630891 | pt_BR |
dc.type.origin | Nacional | pt_BR |
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