Demonstration of the LUCA process for the separation of americium(III) from curium(III), californium(III), and lanthanides(III) in acidic solution using a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid and tris(2-ethylhexyl)phosphate
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Giuseppe Modolo
Abstract
The LUCA process was developed at Forschungszentrum Jülich for the selective separation of Am(III) from an acidic solution containing the trivalent actinides Am(III), Cm(III), and Cf(III) as well as lanthanides. A mixture of 0.4 mol/L bis(chlorophenyl)dithiophosphinic acid and 0.15 mol/L tris(2-ethylhexyl)phosphate dissolved in 20% isooctane/80% tert-butyl benzene was used as the extractant. The process was carried out in centrifugal contactors using an optimized flowsheet involving 7 stages for extraction, 9 stages for scrubbing and 8 stages for back-extraction. Very encouraging results were obtained. A high feed decontamination factor was obtained for Am(III) (>1000), and recovery in the product after stripping was higher than 99.8%. The Am(III) product was contaminated with 0.47% Cm(III). More than 99.9% Cf(III), Eu(III) and >99.5% Cm(III) inventories were directed to the raffinate and the contamination with Am(III) (<0.08%) was low. The experimental results were in good agreement with the predictions of a computer code.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Measurement of excitation functions for production of cerium radioisotopes by deuteron induced reactions on natural cerium for nanobioscience applications
- Demonstration of the LUCA process for the separation of americium(III) from curium(III), californium(III), and lanthanides(III) in acidic solution using a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid and tris(2-ethylhexyl)phosphate
- Anodic stripping voltammetric determination of uranium at a thin palladium film-aluminum electrode: Analysis of some uranium mineral ores
- N, N, N′, N′-tetra(2-ethylhexyl) thiodiglycolamide T(2EH)TDGA: A novel ligand for the extraction of palladium from high level liquid waste (HLLW)
- Sorption kinetics of cesium on ZrO2 and ZrO2-SiO2-TiO2 microspheres
- Comparison of two sequential extraction protocols for fractionation of natural radionuclides in soil samples
- Activity release from the damaged spent VVER-fuel during long-term wet storage
- Biological studies of samarium-153 bleomycin complex in human breast cancer murine xenografts for therapeutic applications
- Effects of gamma radiation on electrochemical properties of ionic liquids
