Abstract
Adsorption experiments were performed to measure distribution coefficients of237Np(V),238Pu(IV) and241Am(III) for sedimentary sequential chemical extraction of the adsorbed radionuclides was carried out with water, CaCl2, KCl, NH2OH−HCl, K-oxalate and H2O2 solutions, to elucidate their dominant sorption mechanisms. The distribution coefficient of237Np was two orders of magnitude smaller than that of238Pu and241Am. Most of237Np adsorbed was extracted with CaCl2 solution and its sorption was controlled by a reversible ion exchange reaction. The adsorbed238Pu was mainly extracted with NH2OH−HCl+K-oxalate solution and its sorption was possibly controlled by irreversible reactions.
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Tanaka, T., Muraoka, S. Sorption characteristics of237Np,238Pu and241Am in sedimentary materials. J Radioanal Nucl Chem 240, 177–182 (1999). https://doi.org/10.1007/BF02349151
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DOI: https://doi.org/10.1007/BF02349151