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Immobilization of Liquid Radioactive Waste in Mineral-Like Matrices Derived From Inorganic Cenosphere-Based Sorbents as Precursors

  • Tatiana A. Vereshchagina (a1) (a2), Nataly N. Anshits (a1) (a2), Elena V. Fomenko (a1), Sergei N. Vereshchagin (a1) (a2) and Alexander G. Anshits (a1) (a2)...

Abstract

The progress in study of immobilization of liquid radioactive waste in mineral-like aluminosilicate matrices (feldspar and feldspathoids) derived from cenosphere-based microspherical zeolite sorbents is reported. Based on the analysis of ‘composition – morphology –C characteristics’ correlation obtained for more than 70 cenosphere products with a high content of one morphological type of imperforated cenospheres, optimal ranges of cenospheres composition were identified for the synthesis of zeolites with the predetermined structural type. Given that the cenosphere-based zeolite sorbents are precursors of the final waste form, further activity proceeds toward developing a highly efficient zeolite sorbent of NaP1 type, which would ensure the effective trapping of Cs+ and/or Sr2+ ions and the phase transformation under relatively mild conditions (T≤1000°C). The paper details the main criteria for realization of the ‘precursor’ approach for fixation of Cs-Sr fraction using cenosphere-based systems; also shown are experimental results indicating practical realization of the proposed approach.

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1 Vereshchagina, T.A., Vasilieva, N.G., Vereshchagin, S.N., Paretskov, E.V., Zykova, I.D., Kruchek, D.M., Manakova, L.F., Tretyakov, A.A., and Anshits, A.G. in Scientific Basis for Nuclear Waste Management XXIX, edited by Iseghem, P.V., (Mat. Res. Symp. Proc., 932, Warrendale, PA, 2006) pp.591598.
2 Vereshchagina, T.A., Fomenko, E.V., Vereshchagin, S.N., Shishkina, N.N., Vasilieva, N.G., Paretskov, E.N., Kruchek, D.M., Tranter, T.J., Anshits, A.G., Proc. Intern. Conf. “Coal Science and Technology” (ICCS&T 2005), October 12-16, 2005, Okinawa, Japan. – 12 p.
3 Anshits, N.N., Salanov, A.N., Vereshchagina, T.A., Kruchek, D.M., Bajukov, O.A., Tretyakov, A.A., Revenko, Yu. A., and Anshits, A.G., Int. J. Nucl. Energy Sci.&Tech., 2, Nos.1/2, 8 (2006).
4 Vereshchagina, T.A., Anshits, N.N., Zykova, I.D., Salanov, A.N., Tretyakov, A.A., Anshits, A.G., Khimiya v interesakh ustoichivogo razvitiya [Chemistry for Stable Development], 9, 379391 (2001).
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8 GOST P 52126-2003. National Standard of Russian Federation. Radioactive waste. Long time leach testing of solidified radioactive waste forms.
9 Kizilshtein, L.I., Dubov, I.V., Shpitsgluz, A.L., Parada, S.G., Komponenti zol i shlakov TES (Energoatomizdat, Moscow, 1995) p. 176.

Immobilization of Liquid Radioactive Waste in Mineral-Like Matrices Derived From Inorganic Cenosphere-Based Sorbents as Precursors

  • Tatiana A. Vereshchagina (a1) (a2), Nataly N. Anshits (a1) (a2), Elena V. Fomenko (a1), Sergei N. Vereshchagin (a1) (a2) and Alexander G. Anshits (a1) (a2)...

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