Supercritical fluid extraction of thorium and uranium ions from solid and liquid materials with fluorinated [beta]-diketones and tributyl phosphate

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00055a034· OSTI ID:7243165

Lin, Y; Wai, C M; Jean, F M; Brauer, R D ^[1]

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1. Univ. of Idaho, Moscow, ID (United States)

A recent report shows that trivalent lanthanide and uranyl ions can be extracted by supercritical CO[sub 2] containing the fluorinated [beta]-diketone, 2,2-dimethyl-6,6,7,7,8,8,8-hyptafluoro-3,5-octanedione (FOD). Extraction and separation of actinides by supercritical fluids are of particular interest today because of potential applications to nuclear waste analysis and management. This paper describes the conditions of extracting thorium and uranium ions from solid and liquid materials by supercritical CO[sub 2] containing different [beta]-diketones. The synergistic extraction of the actinides by mixed ligands involving [beta]-diketones and tributyl phosphate (TBP) in supercritical CO[sub 2] is also reported. Synergistic extraction is another approach to improve the efficiencies of ligands of SFE of actinides. Potential applications of this new extraction technique for the separation of actinides from environmental samples are discussed. The five [beta]-diketones tested for the extraction of uranyl and Th(IV) ions in supercritical carbon dioxide are given as follows: acetylacetone, trifluoroacetylacetone, hexafluoroacetylacetone, thienoyltrifluoroacetylacetone, and FOD. 12 refs., 5 tabs.

• OSTI ID: 7243165
• Journal Information: Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 28:6; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400105* -- Separation Procedures
400702 -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACETYLACETONE
ACTINIDE COMPOUNDS
BUTYL PHOSPHATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHELATING AGENTS
COMPILED DATA
DATA
ESTERS
EXTRACTION
HETEROCYCLIC COMPOUNDS
INFORMATION
IONS
KETONES
LIGANDS
MANAGEMENT
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
RADIOACTIVE WASTE MANAGEMENT
REAGENTS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SUPERCRITICAL GAS EXTRACTION
SYNERGISM
TBP
THORIUM IONS
TTA
URANIUM COMPOUNDS
URANIUM IONS
URANYL COMPOUNDS
WASTE MANAGEMENT