Abstract
Solvent extraction characteristics of Th, u, Np, Pu, Am and Cm ions of various oxidation states by ionizable crown ethers such as sym-dibenzo-16-crown-5-oxyacetic acid and sym-dibenzo-16-crown-oxy-acetylhydroxamic acid were studied. From results of pH-dependence of the distribution ratio of metal ions the ionizable crown ethers are promising for the application in the separation and preconcentration of actinide elements. The extracted species of Th{IV), U(VI) and Am(III) were confirmed to be Th(OH)2L2 (L; crown ether), UO2(OH)L and Am(OH)L2, respectively.
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Acknowledgments
This work was supported in part by the Idaho EPSCoR Program of the National Science Foundation under Grant No. RII 8902065 and by a research fellowship ( to C. M. W. ) from Japan Atomic Energy Research Institute.
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Wai, C.M., Du, H.S., Meguro, Y. et al. Selective Extraction and Separation of Actinides with Ionizable Crown Ethers. ANAL. SCI. 7 (Suppl 1), 41–44 (1991). https://doi.org/10.2116/analsci.7.Supple_41
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DOI: https://doi.org/10.2116/analsci.7.Supple_41