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

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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.

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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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Authors and Affiliations

  1. Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninsky Prospect 31 Building 4, Moscow, Russia, 119071

    Yulia V. Konevnik, Konstantin V. Martynov, Yana Yu. Karaseva, Natalia I. Rodygina & Elena V. Zakharova

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  1. Yulia V. Konevnik
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  2. Konstantin V. Martynov
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  3. Yana Yu. Karaseva
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  4. Natalia I. Rodygina
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  5. Elena V. Zakharova
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Correspondence to Yulia V. Konevnik.

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Konevnik, Y.V., Martynov, K.V., Karaseva, Y.Y. et al. The role of phosphate released from Na–Al–P glass under repository conditions in speciation and transport of americium. J Radioanal Nucl Chem 321, 83–89 (2019). https://doi.org/10.1007/s10967-019-06569-8

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  • DOI: https://doi.org/10.1007/s10967-019-06569-8

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