Abstract
Sorption of Np(V) on illite, shale and MX-80 under oxidizing conditions were first studied in two types of high ionic strength solutions: (i) a reference brine solution (SR-270-PW) with an ionic strength of 6.0 M, and (ii) Na–Ca–Cl solutions. The effects of pHc, Na/Ca ratio, and ionic strength on Np(V) sorption in Na–Ca–Cl solutions were investigated. The K d values and the sorption isotherms in SR-270-PW and Na–Ca–Cl solutions were also evaluated.
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Acknowledgments
This work is funded by the Nuclear Waste Management Organization and the Natural Science and Engineering Research Council of Canada, Discovery Grant Program (RGPIN-2014-05732). The authors wish to acknowledge Dr. Akira Kirishima (Tohoku University) for his valuable comments on the spectroscopic measurement, the molar absorption coefficient of Np(V), and the Np oxidation state adjustment to Np(V). The authors would like to thank Dr. Monique Hobbs of NWMO for valuable discussion and review of this manuscript. The constructive and valuable reviews by two anonymous referees are highly appreciated.
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Nagasaki, S., Saito, T. & Yang, T.T. Sorption behavior of Np(V) on illite, shale and MX-80 in high ionic strength solutions. J Radioanal Nucl Chem 308, 143–153 (2016). https://doi.org/10.1007/s10967-015-4332-x
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DOI: https://doi.org/10.1007/s10967-015-4332-x