04-14E

Using quantum-chemical calculations (ab-initio method) processes of adsorption of uranyl, cesium, strontium on silicate surface are investigated. It is shown that the surface adsorbs UO$_{2}^{2 + }$, Cs$^{ + }$, Sr$^{2 + }_{ }$ and detail information about charge and distance distribution between atoms of adsorbate and sorbent are obtained, bond forces are calculated. It is shown, that presence of a hydrated shell of uranyl essentially diminishs quantity of energy of reaction.