ИСТИНА

The proposed invention relates to processes for extracting and concentrating radionuclides and can be used in radio chemical technologies when treating liquid radioactive waste . The method for isolating americium from liquid radioactive waste and for separating americium from rare earth elements in a single extraction cycle involves joint extraction of americium and rare earth elements from a nitric acid radioactive solution with a neutral solution of an organic extraction agent in a polar fluorinated solvent ; washing an obtained organic phase saturated with metals ; and selective back extraction of americium , wherein the extraction agent for joint extraction is N , N , N ' , N ' - tetraalkylamide of diglycolic acid , and a solution for back extraction is a composition of 5-20 g/l of a complexone , 5-60 g/l of a nitrogen - containing organic acid and 60-240 g/l of a salting out agent