Investigation of the chemical and radiation stability of titanium dioxide with surface arsenate groups during Sr adsorption.

The chemical and radiation stability of titanium dioxide with surface arsenate groups during Sr adsorption has been studied. The oxalate technique has been used to obtain a solution containing Sr from the objects of the aquatic environment of the Chornobyl Exclusion Zone. The dependence of the strontium adsorption on the acidity of the solution and the initial activity of the solution (Bq per mL) has been shown. SEM, XRF, and EDS spectroscopy confirm the chemical resistance of 4As-TiO during regeneration. According to the study with Sr, the decrease in the adsorption capacity of 4As-TiO during regeneration is associated with incomplete leaching of strontium from 4As-TiO micropores. Using an electron accelerator, the radiation resistance of titanium dioxide with surface arsenate groups to β -particles with an energy of 1 MeV has been studied. The invariability of the elemental composition and adsorption properties of 4As-TiO at irradiation doses of 5·10Sv testifies to the high radiation resistance of 4As-TiO. The result obtained indicates the promise of 4As-TiO for improving radiochemical methods.