FIELD: power industry.
SUBSTANCE: processing method of low-mineralised liquid radioactive wastes involves filtration through selective ferrocyanide absorbent, and then through ion exchange absorbents. Absorbent is obtained by sequential processing of organic carrier with solutions of potassium ferrocyanide and nickel salts with excess content of each reagent. As organic carrier for obtaining selective ferrocyanide absorbent there used is saw dust pre-dried at temperature of 105-110°C with sizes of 1-4 mm. At that, nickel-potassium ferrocyanide is synthesised immediately in structure of saw dust. Used radioactive ferrocyanide absorbent is burnt. Ash residue is added to cement compound as binding agent.
EFFECT: invention allows increasing by more than 10 times the capacities of selective ferrocyanide absorbent on the basis of pre-dried saw dust in comparison to application of nickel-potassium ferrocyanide to ion exchange resins; increasing operational life of sorption filters; cheapening of preparation technology of selective absorbent and reducing the volume of secondary disposed radioactive wastes.
3 ex
