Vfsylyeva H. Physical and chemical processes of sorption of fission fragments of 235U from aqueous solutions by inorganic sorbents.

The thesis is devoted to the research sorption of fission fragments of 235U: 92Sr, 97Zr, 97Nb, 133 I, 135I, 139Bа, 142La, 143Ce from water solutions. The fission fragments, such as 92Sr, 97Zr, 97Nb, 139Ba, 142La, 143Ce were obtained from 235U fission by thermal neutrons and accumulated in the water solution. The sorption coefficients for a particular fission fragment are determined using gamma-spectrometry. The influence of pH, temperature, volume of solution and personal characteristics of the elements on sorption processes was investigated. Amount the numbers of inorganic sorbents phosphate titanium showed the best sorbational properties. These investigations may be helpful in revealing important aspects of the mechanism of the sorption reaction or in determining independent yield of 135Xe for the nuclear physic.