Organosilicon ion-exchange and complexing adsorbents

Data on the ion-exchange and complexing organosilicon adsorbents published during the last 10-12 years, including the results of systematic research of the authors, are summarized and analyzed. The following types of substances are considered: silicas with covalently grafted modifiers, silicas and aluminosilicates with non-covalently grafted modifiers and carbofunctional polyorganylsilsesquioxanes prepared by polycondensation of appropriate organosilicon monomers. Adsorbents of these types find extensive practical use, in particular, as analytical reagents for determination of metals in natural and artificial specimens, agents for isolation of valuable elements from industrial wastes and agents for removal of especially hazardous components from wastes and effluents. The bibliography includes 109 references.