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Studies on the uptake and column chromatographyic separation of Eu, Th, U, and Am by tetramethylmalonamide resin

Shimada, Asako; Sulakova, J.*; Yang, Y.*; Alexandratos, S.*; Nash, K. L.*

A tetramethylmalonamide-functionalized resin (TMMA resin) has been developed and investigated for its ability to separate trivalent, tetravalent, and hexavalent actinide elements. As a fundamental study of the extraction mechanism and to design a chromatographic separation scheme, distribution coefficients ($$K$$$$_{d}$$) for partitioning of Eu(III), Th(IV), U(VI), and Am(III) onto the resin from HNO$$_{3}$$, NaNO$$_{3}$$, HCl and NaCl solutions with and without organic acids and potential consistents of low-level radioactve waste have been determined. The competition between metal extraction and HNO$$_{3}$$ extraction was confirmed by the extraction data and FT-IR spectra. Based on these fundamental experimental results, an extractive chromatographic scheme for actinide isolation was designed and demonstrated.

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Category:Chemistry, Multidisciplinary

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