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Type: Artigo de periódico
Title: Chemisorption Of Some Divalent Cations On Silica Modified Through The Reaction Of Pentane-2,4-dione With 3-propylethylenediamine Silica Gel
Author: Espinola J.G.P.
de Freitas J.M.P.
de Oliveira S.F.
Airoldi C.
Abstract: The reaction of 3-propylethylenediamine groups covalently bonded to silica gel with pentane-2,4-dione in benzene resulted in a modified surface having 11.4·10-4 mol g-1 of ligand sites which adsorb the divalent cations Co2+, Ni2+, Cu2+ and Zn2+ from ethanol solution with maximum adsorptions of 5.0·10-4 mol g-1, 2.0·10-4 mol g-1, 5.0·10-4 mol g-1 and 5.9·10-4 mol g-1, respectively. The adsorption isotherms are very similar in shape for all the cations and conform to the Langmuir model. The complexes formed on the surface have a molar composition or one cation to two anchored groups of Schiff bases and the geometries of the complexes are similar to those obtained in solution. © 1992.
Citation: Colloids And Surfaces. , v. 68, n. 4, p. 261 - 266, 1992.
Rights: fechado
Identifier DOI: 10.1016/0166-6622(92)80211-J
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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