Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/58199
Type: Artigo de periódico
Title: THIOL-ANCHORED SILICA AND ITS OXIDIZED FORM - SOME DIVALENT-CATIONS CHEMISORBED IN AQUEOUS AND NONAQUEOUS SOLVENTS
Author: CESTARI, AR
AIROLDI, C
Abstract: The silylating agent 3-trimethoxysilyl-1-propanethiol was immobilized on silica gel in xylene and this modified silica surface was also oxidized in water with a permanganate solution. Both silicas were characterized by elemental analysis, infrared spectroscopy, thermogravimetry and carbon NMR in solid state. Sulphur analysis showed 0.98 mmol of thiol groups and one fourth of these as oxidized groups per gram of support. These groups chemisorb in batches according to the following divalent cations: nickel, cobalt, copper and mercury from both aqueous and non-aqueous solvents. Mercury is the most adsorbed cation for thiol (7.46 and 8.55 x 10(-4) mol g(-1)) and the oxidized (4.15 and 5.21 x 10(-4) mol g(-1)) silicas in ethanol and water solutions, respectively.
Subject: SILICA GEL
IMMOBILIZATION
3-TRIMETHOXYSILYL-1-PROPANETHIOL
CHEMISORPTION
THIOL-MODIFIED SILICA
Country: Brasil
Editor: Soc Brasileira Quimica
Rights: aberto
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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