| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to a method of extracting americium from liquid radioactive wastes to separate it from rare-earth metals. Method includes combined extraction of americium and rare-earth metals from nitrate radioactive solution with solution of neutral organic extractant in a polar fluororganic solvent, washing metal-saturated organic phase, selective re-extraction of americium. Extraction agent used is N,N,N′,N′-tetraalkylamide diglycolic acid, solution for re-extraction of americium is a composition of 5-20 g/l complexon, 5-60 g/l of nitrogen-containing organic acid and 60-240 g/l salting-out agent.EFFECT: technical result consists in extraction of americium from acidic liquid radioactive solutions and its separation from all rare-earth metals in one extraction cycle.5 cl, 34 tbl, 17 ex |
