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This work describes the preparation and characterization of a cellulose acetate fiber coated with Al2O3, resulting in the organic-inorganic hybrid Cella/Al2O3. Furthermore, it was modified by attaching organofunctional groups, by reaction with the precursor reagents (RO)3Si(CH2)3L (L = -NH2, NH(CH2)2NH2, NH(CH2)2NH(CH2) 2NH2 and NC3H3N), resulting in Cella/Al2O3/Si(CH2 )3NH2 (1), Cella/Al2O3/Si(CH2 )3NH(CH2)2NH2 (2), Cella/Al2O3/Si(CH 2)3NH(CH2)2 NH(CH2)2NH2 (3) and Cella/Al2O3/Si(CH2 )3NC3H3N (imidazole) (4). The amount of attached organofunctional groups were (in mmol per gram of the material): 1 = 1.90, 2 = 1.89, 3 = 1.66 and 4 = 1.35. The adsorption isotherms from ethanol solutions of FeCl3, CuCl2 and ZnCl2 by Cella/Al2O3/Si(CH2 )3L were obtained at 298 K. The results obtained in flow experiments showed a retention and recovery of ca. 100% of the metal ions by Cella/Al2O3/Si(CH2 )3L packed in a column, for a solution containing either one or mixture of the ions.Este trabalho descreve a preparação e a caracterização da fibra acetato de celulose recoberta com Al2O3, resultando no híbrido orgânico-inorgânico Cella/Al2O3. Posteriormente, este híbrido foi modificado, imobilizando-se grupos organofuncionais, através da reação com o precursor (RO)3Si(CH2)3L (L = -NH2, -NH(CH2)2NH2, -NH(CH2)2NH(CH2) 2NH2 e -NC3H3N), o que resultou nos materiais Cella/Al2O3/Si(CH2 )3NH2 (1), Cella/Al2O3/Si(CH2 )3NH(CH2)2NH2 (2), Cella/Al2O3/Si(CH2 )3NH(CH2)2NH(CH 2)2NH2 (3) e Cella/Al2O3/Si(CH2 )3NC3H3N (imidazol) (4). A quantidade de grupos organofuncionais ligados foram (em mmol por grama de material): 1 = 1,90, 2 = 1,89, 3 = 1,66 e 4 = 1,35. As isotermas de adsorção das soluções etanólicas de FeCl3, CuCl2 e ZnCl2 por Cella/Al2O3/Si(CH2 )3L foram obtidas à 298 K. Os resultados obtidos pela análise em fluxo mostraram uma retenção e recuperação de praticamente 100% dos íons metálicos na coluna empacotada com Cella/Al2O3/Si(CH2 )3L, para uma solução contendo apenas um ion ou uma mistura de íons

journal of the brazilian chemical society

Nitrogen Containing Organosilicon Bonded an Al2O3-Cellulose Acetate Hybrid Material: Preparation, Characterization and Use for Adsorption of Fe(III), Cu(II) and Zn(II) from Ethanol Solutions