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Title: The separation of lanthanides and actinides in supercritical fluid carbon dioxide

Journal Article · · Journal of Radioanalytical and Nuclear Chemistry
 [1];  [2];  [1];  [1];  [2];  [3]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Univ. of Idaho, Moscow, ID (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Idaho, Moscow, ID (United States)
+ Show Author Affiliations

Supercritical fluid carbon dioxide presents an attractive alternative to conventional solvents for recovery of the actinides and lanthanides. Carbon dioxide is a good solvent for fluorine and phosphate-containing ligands, including the traditional tributylphosphate ligand used in process-scale uranium separations. Actinide and lanthanide oxides may even be directly dissolved in carbon dioxide containing the complexes formed between these ligands and mineral acids, obviating the need for large volumes of acids for leaching and dissolution, and the corresponding organic liquid–liquid solvent extraction solutions. As a result, examples of the application of this novel technology for actinide and lanthanide separations are presented.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1326222
Report Number(s):
INL/JOU-15-35727; PII: 4576
Journal Information:
Journal of Radioanalytical and Nuclear Chemistry, Vol. 307, Issue 3; ISSN 0236-5731
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

References (11)

Effects of supercritical fluid extractions on metal ion partitioning as indicated by sequential extractions journal January 2001
Supercritical fluid extraction of plutonium and americium from soil using thenoyltrifluoroacetone and tributylphosphate complexation journal January 2001
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Selective Extraction of Uranium from a Mixture of Metal or Metal Oxides by a Tri-n-butylphosphate Complex with HNO3 and H2O in Supercritical CO2 journal January 2006
Direct dissolution of intact UO2 pellet and in situ extraction by organic solutions of TBP-HNO3 at atmospheric pressure: role of solvate composition journal May 2011
Characteristics of an oxa-diamide–HNO3 extractant in the supercritical fluid extraction of uranium journal December 2013
Extraction of Uranium(VI) in Nitric Acid Solution with Supercritical Carbon Dioxide Fluid Containing Tributylphosphate journal January 1996
Uranyl Extraction by TBP from a Nitric Aqueous Solution to SC-CO2: Molecular Dynamics Simulations of Phase Demixing and Interfacial Systems book August 2003
Characterization of a Tri- n -butyl Phosphate−Nitric Acid Complex:  a CO 2 -Soluble Extractant for Dissolution of Uranium Dioxide journal October 2003
Development of a Unique Process for Recovery of Uranium from Incinerator Ash book January 2010
Supercritical fluid extraction and separation of uranium from other actinides journal June 2014

Cited By (1)

Ligands for f-element extraction used in the nuclear fuel cycle journal January 2017

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Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
actinides
carbon dioxide
fuel cycle
lanthanides
separations
supercritical fluid