Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/63057
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, JGP
DEFREITAS, JMP
DEOLIVEIRA, SF
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 of one cation to two anchored groups of Schiff bases and the geometries of the complexes are similar to those obtained in solution.
Subject: CHEMISORPTION
IMMOBILIZATION
3-PROPYLETHYLENEDIAMINE SILICA GEL
SCHIFF BASE
SILICA GEL
Country: Holanda
Editor: Elsevier Science Bv
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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