SUPERCRITICAL-FLUID EXTRACTION OF URANIUM AND TRANSURANIUM AND RARE-EARTH ELEMENTS FROM SURFACES OF SOLIDS

Authors
MURZIN AA BABAIN VA SHADRIN AY SMIRNOV IV ROMANOVSKII VN MURADYMOV MZ
Citation
Aa. Murzin et al., SUPERCRITICAL-FLUID EXTRACTION OF URANIUM AND TRANSURANIUM AND RARE-EARTH ELEMENTS FROM SURFACES OF SOLIDS, Radiochemistry, 40(1), 1998, pp. 47-51
Citations number
17
Categorie Soggetti
Chemistry Analytical","Chemistry Inorganic & Nuclear
Journal title
Radiochemistry → ACNP
ISSN journal
10663622
Volume
40
Issue
1
Year of publication
1998
Pages
47 - 51
Database
ISI
SICI code
1066-3622(1998)40:1<47:SEOUAT>2.0.ZU;2-N
Abstract
Supercritical CO2-fluid extraction of uranyl nitrate and europium nitr ate complexes with neutral mono-and bifunctional organophosphorus comp ounds was studied. Uranyl nitrate is extracted by supercritical CO2 fl uid in the presence of butyl 3,3,4,4-tetrafluoro-2-methylbut-2-yl meth ylphosphonate to 62-72% and in the presence of tributyl phosphate only to 35-45%. Air-dry uranyl, plutonium, and americium nitrates are extr acted with supercritical CO2 fluid containing tributyl phosphate, hexa fluoroacetylacetone, and water from the surface of stainless steel, ru bber, and asbestos to 75-97%.