Amino-Modified Silicate Gels Prepared by Sol-Gel Processing as Metal-Ion Sorbents

摘要

Two scries of ammo-modified silicate gels prepared by sol-gel processing were used to alworb Cu(II), Ni(II), Co(II), Mn(II) and Cr(III) from aqueous solutions. These easily prepared sorbcnts 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 usedas 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.