Study of solid extractants based on malonamides, diglycolamides, and bipyridines for the partitioning of minor actinides from high active wastes |
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Authors: | J Šul’aková J John F Šebesta |
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Institution: | (1) Centre for Radiochemistry and Radiation Chemistry, and Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic |
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Abstract: | In this work, the performance of the solid extractants with polyacrylonitrile (PAN) binding matrix was studied for the separation
of lanthanides and actinides from nitric acid solutions. As extractants, incorporated into the PAN matrix, the N,N′-dimethyl-N,N′-dibutyltetradecylmalonamide
(DMDBTDMA), N,N′-dimethyl-N,N′-dioctyl-hexy-loxyethylmalonamide (DMDOHEMA), N,N,N′,N′-tetraoctyldiglycolamide (TODGA), 6,6′-bis-(5,6-dipentyl-1,2,4]triazin-3-yl2,2′]bipyridinyl
(C5BTBP) were used. Weight distribution coefficients Dg of europium and several actinides have been determined for all the composite materials. The kinetics of europium uptake,
practical dynamic extraction capacities, and extraction isotherms were also determined. The results obtained revealed that
the solid extractants studied are prospective for the partitioning of lanthanides and actinides from liquid radioactive wastes. |
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