Sorption properties of hybrid organic-silica material towards 137Cs, 90Sr and 90Y radionuclides

Hybrid organic-silica material modified by amino groups has been investigated as adsorbent of radionuclides Sr-90, Y-90 and Cs-137 from aqueous solutions. The sorption ability of the organic-silica material in the pH range of 2-9 with thermostating is studied by static sorption method. Analysis of sorption kinetic curves of radionuclides for aminoxerogel has shown that sorption equilibrium is established in 3-3.5 h. It is shown that the mechanisms of radionuclides sorption on the organic-silica material are combined by the complex formation and ion-exchange mechanism. The amino containing organic-silica material can be recommended for the cleaning of surfaces and purification of water solutions contaminated with Sr-90 and Y-90.