Amino-modified silicate gels prepared by sol-gel processing as metal-ion sorbents |
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Authors: | Andrzej M. Kłonkowski Teresa Widernik Beata Grobelna |
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Affiliation: | (1) Faculty of Chemistry, University of Gdansk, ul. Sobieskiego 18, 80-952 Gdansk, Poland |
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Abstract: | Two series of amino-modified silicate gels prepared by sol-gel processing were used to absorb Cu(II), Ni(II), Co(II), Mn(II) and Cr(III) from aqueous solutions. These easily prepared sorbents with various content of primary amino groups in series (A) or primary and secondary amino groups in series (AA) have reasonable stability. The gel composition, time and concentration dependence of the uptake of the metal ions by these materials were studied systematically. These materials would be further used as supports to disperse catalytically active phases by conventional wet chemical procedures. Apart from this they demonstrate potential for the preconcentration aid for transition metal analysis. |
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Keywords: | Amino modified silicate gel sol-gel processing metal ion sorbent |
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