Study of solid extractants based on malonamides, diglycolamides, and bipyridines for the partitioning of minor actinides from high active wastes
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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-yl[2,2′]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.
KeywordsOctanol Americium Nitric Acid Concentration Solid Extractant Minor Actinide
- Madic C., Lecomte M., Dozol J.-F., and Boussier H.: In: Proc. EURADWASTE ‘04 — „Radioactive Waste Management — Community Policy and Research Initiatives”, Luxembourg 2004. ftp://ftp.cordis.europa.eu/pub/fp6-euratom/docs/euradwaste04pro_5-madic_en.pdfGoogle Scholar
- Madic C. and Hudson M. J.: High-Level Liquid Waste Partitioning by Means of Completely Incinerable Extractants, Report EUR 18038, 1998.Google Scholar
- Choppin G. R., Khankhasayev M. K., and Plendl H. S.: Chemical Separation in Nuclear Waste Management. The state of the art and look to the future, Florida State University, USA, 2002, p. 40.Google Scholar
- Sasaki Y. and Choppin G. R.: Anal. Sci. 12 (1996) 225.Google Scholar