HIGH EXTRACTION OF U FROM ACIDIC SOLUTIONS BY SOLID EXTRACTION SOLUTIONS

Sorption of U from HNO3, H2SO4, and HF media by solid extraction solut ions based on dioctylisoamylphosphine oxide and naphthalene is studied . The new type of sorbents can be used for high extraction of U from a queous HNO3 into the solid. The extraction time is 1-1.5 h. The D valu es exceed 10(4). The total capacity of the sorbent is consistent with 2:1 complex formation. The D(U) values are in the range 100-1000 for e xtraction of U from H2SO4 and HF solutions. Solid extraction solutions can be used in analytical procedures and are promising for further de veloping the analytical chemistry of U.