Sorption behavior of Np(V) on illite, shale and MX-80 in high ionic strength solutions

  • Shinya Nagasaki
  • Takumi Saito
  • Tammy Tianxiao Yang
Article

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 Kd values and the sorption isotherms in SR-270-PW and Na–Ca–Cl solutions were also evaluated.

Keywords

Np(V) Sorption High ionic strength solutions Illite Shale MX-80 

Notes

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.

Supplementary material

10967_2015_4332_MOESM1_ESM.docx (18 kb)
Supplementary material 1 (DOCX 18 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Shinya Nagasaki
    • 1
  • Takumi Saito
    • 2
  • Tammy Tianxiao Yang
    • 3
  1. 1.McMaster UniversityHamiltonCanada
  2. 2.Japan Atomic Energy AgencyTokaiJapan
  3. 3.Nuclear Waste Management OrganizationTorontoCanada

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