Hybrid organic-silica material modified by amino groups has been investigated as adsorbent of radionuclides 90 Sr, 90 Y and 137 Cs from aqueous solutions. The sorption ability of the organicsilica 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 90 Sr and 90 Y. Keywords Hybrid organic-silica material, radionuclides 90 Sr, 137 Cs and 90 Y, sol-gel method, amino containing xerogel, water purification

In this study, nano-sized particles of manganese oxyhydroxide (MnO(OH)) are synthesized. Sorption properties of this material towards 90 Sr and 137 Cs radionuclides in the pH range from 2 to 9 at a temperature of 293.15 K solution are studied. The time of sorption achievement equilibrium in the radionuclide sorbent system depends on the nature of sorbed cation, but does not exceed 60 min.

No abstract

No abstract