Modification conditions of poly-3-(2-aminoethylamino)propylsilsesquioxane with sulfur-containing groups as an instrument for influencing silver(I) sorption from multicomponent solutions

The effect of modification conditions of poly-3-(2-aminoethylamino)propylsilsesquioxane with ammonium thiocyanate was studied. The possibility of varying the sorption properties of materials due to the formation of dithiobiuret or thiourea groups on the sorbent surface under certain conditions was established. The synthesized sorbents have high selectivity for silver(I) at pH from 0 to 8. The use of thiourea sulfuric acid solutions as a desorbent allows for a total desorption rate of up to 90%. An isochronous study of the stability of the sorption properties of modified polysilsesquioxanes was carried out for the first time: the sorption properties are preserved for 5 years. Modified poly-3-(2-aminoethylamino)propylsilsesquioxanes can be used for the selective and quantitative extraction of silver(I).