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The role of phosphate released from Na–Al–P glass under repository conditions in speciation and transport of americium

  • Yulia V. KonevnikEmail author
  • Konstantin V. Martynov
  • Yana Yu. Karaseva
  • Natalia I. Rodygina
  • Elena V. Zakharova
Article

Abstract

Interactions of components of the multibarrier safety system of an underground repository environment are important factors for safety assessments. Na–Al–P glass is the major high level waste (HLW) matrix in Russia. Degradation of HLW glass causes an increase of phosphate concentration in water that influences on radionuclides speciation. Americium is important in HLW. In the presence of phosphate in synthetic groundwater almost half of the americium present is in colloidal matter and its sorption onto clay is slightly decreased relative to the absence of phosphate. The presence of phosphates in the system of synthetic groundwater—clay during sorption experiments significantly affected on the solid-phase speciation and led to an increase in the proportion of strongly bound americium.

Keywords

Phosphate Americium Clay Sorption Speciation 

Notes

Acknowledgements

This work was partially supported by Ministry of Science and Higher Education of the Russian Federation (Theme № AAAA-A16-116110910010-3).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Yulia V. Konevnik
    • 1
    Email author
  • Konstantin V. Martynov
    • 1
  • Yana Yu. Karaseva
    • 1
  • Natalia I. Rodygina
    • 1
  • Elena V. Zakharova
    • 1
  1. 1.Institute of Physical Chemistry and ElectrochemistryRussian Academy of ScienceMoscowRussia

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