Organosilicon ion-exchange and complexing adsorbents

Abstract

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

Silica gel with covalently immobilized thiosemicarbazide for solid-phase concentration of mercury

“…Среди большого разнообразия твер-дофазных экстрагентов наиболее привлекательны химически модифицированные силикагели, пред-ставленные не только оригинальными образцами материалов, полученными в научных группах [1,2], но и коммерчески доступными «scavenger» [3,4]. Та-кая распространенность этих материалов обуслав-ливается, в первую очередь, доступностью самого носителя, возможностями варьирования его струк-турных характеристик в широких пределах, а так-же благодаря высокой реакционной способности поверхностных силанольных групп, за счет кото-рых реализуется ковалентная иммобилизация [5].…”

Effect of polymer backbone chemical structure on metal ions binding by imidazolylmethyl derivatives

“…The optimal choice of polymers for metal ions uptake is based on numerous factors, most important of which are selectivity and sorption capacity. Both of these parameters can be significantly improved via polymer analogous transformation of natural and synthetic commercially available polymers resulting in introduction of new functionalities to the macromolecules [8][9][10][11][12].…”

DTPA-Functionalized Silica Nano- and Microparticles for Adsorption and Chromatographic Separation of Rare Earth Elements

“…Aside from chromatography, other new approaches based on the use of functional solid adsorbents have been developed for REE separation. The early work on surface functionalized resin-like organosilicas has been summarized by Voronkov et al The focus was initially on ion-exchange functions, such as sulfonate, but has later shifted toward more REE-selective phosphonate ligands. , In the search for approaches for facilitated separation of adsorbents and their further regeneration, the use of magnetic particles coated by protective dense silica layers has been developed. The particles thus produced are infinitely stable in highly acidic media, permitting their multiple use .…”