FIELD: chemistry.
SUBSTANCE: in the method, a nitrate solution of a meta, which is a component of radioactive wastes, is mixed in ethanol with tetraethoxysilane diluted with ethanol, followed by addition of an organic acid, preferably ascorbic acid. The mixture is then stirred at room temperature for 2-5 hours, preferably 4 hours, during the initial phase of hydrolysis occurs. The obtained silicate-hydroxy-nitrate-ascorbic sol containing the metal element which is a component of radioactive wastes then undergoes a second hydrolysis phase and polymerisation at 70°C. The sol is then evaporated to a dry residue at 0.1 MPa. Heat treatment of the obtained gel is carried out for 4 hours at 1200°C with a heating rate of 2°C/min.
EFFECT: obtaining silicate glass with a metal element firmly embedded in its structure, shorter and simpler process cycle.
10 cl, 4 ex
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