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Porous Materials Based on Cenospheres of Coal Fly Ash for Fixation of Cs-137 and Sr-90 in Mineral-like Aluminosilicates

Published online by Cambridge University Press:  21 March 2011

Tatiana A. Vereshchagina ,
Natalia G. Vasilieva ,
Sergei N. Vereshchagin ,
Evgenyi N. Paretskov ,
Irina D. Zykova ,
Dmitryi M. Kruchek ,
Ludmila F. Manakova ,
Alexander A. Tretyakov  and
Alexander G. Anshits
Tatiana A. Vereshchagina
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx St., Krasnoyarsk, 660036, Russia, [email protected]
Natalia G. Vasilieva
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx St., Krasnoyarsk, 660036, Russia
Sergei N. Vereshchagin
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx St., Krasnoyarsk, 660036, Russia
Evgenyi N. Paretskov
Affiliation:
Mining Chemical Combine, 53 Lenin St., Zheleznogorsk, 662972, Russia
Irina D. Zykova
Affiliation:
Krasnoyarsk State Technical University, 26 Kyrenskyi St., Krasnoyarsk, 660074, Russia
Dmitryi M. Kruchek
Affiliation:
Mining Chemical Combine, 53 Lenin St., Zheleznogorsk, 662972, Russia
Ludmila F. Manakova
Affiliation:
Mining Chemical Combine, 53 Lenin St., Zheleznogorsk, 662972, Russia
Alexander A. Tretyakov
Affiliation:
Mining Chemical Combine, 53 Lenin St., Zheleznogorsk, 662972, Russia
Alexander G. Anshits
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx St., Krasnoyarsk, 660036, Russia
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Abstract

Among the crystalline matrices being developed for immobilization of 137Cs and 90Sr are framework aluminosilicates like feldspars and feldspathoids. A novel approach to obtain mineral-like aluminosilicate forms of 137Cs and 90Sr with using porous materials based on hollow aluminosilicate microspheres of coal fly ash (cenospheres) has been demonstrated. Two modifications of microspherical porous materials have been developed, (i) moulded porous matrices based on consolidated cenospheres and (ii) zeolite sorbents obtained by hydrothermal zeolitization of cenospheres. The first includes impregnation of Cs- or Sr-containing solutions into porous matrices, drying and calcining at temperatures (700-900°C) lower than the softening point of the porous matrix material, at which solid phase crystallization takes place with formation of framework aluminosilicates, such as Cs-nepheline, pollucite or Sr-anorthite. Using zeolite sorbents, immobilization of Cs+ and Sr2+ proceeds through the step of trapping ions from the solution followed by drying and thermochemical solid-phase transformation of saturated zeolites into pollucite or Sr-anorthite over the same temperature range. Cenosphere-derived porous matrices and zeolite sorbents were tested in fixation of 137Cs using spiked simulants of actual radioactive waste. The durability of crystalline aluminosilicate 137Cs -forms obtained was shown to satisfy Russian (GOST P 50926-96) and international standards.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 59.1
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

1. Shatalov, V. V., Bulletin on Atomic Energy, 7, 37 (2002).Google Scholar
2. Kotelnikov, A.R., Akhmedzhanova, G.M., and Suvorova, V.A., Geochemistry International, 37, 163–170 (1999).Google Scholar
3. Kotelnikov, A.R., Bychkov, A.M., Zyryanov, V.N., Akhmedzhanova, G.M., and Gavlina, O.T., Geokhimiya, 33, 1527–1532 (1995).Google Scholar
4. Kovalsky, A.M., Akhmedzhanova, G.M., and Kotelnikov, A.R., Herald of DGGGMS RAS, 1 (20) (2002).Google Scholar
5. Aransiba, N.E., Bogdanov, R.V., Kuznetsov, R.A., Sergeev, A.S., Glushkova, V.B., and Panova, T.I., Radiokhimiya, 44, 461–469 (2002).Google Scholar
6. Barinova, T.V., Borovinskaya, I.P., Ratnikov, V.I., and Ignatieva, T.I., Proc. All-Russ. Conf. “Processes of Burning and Explosion in Physicochemistry and Technology of Inorganic Materials”, Moscow, 22-24 June 2002, pp. 31–33.Google Scholar
7. Anshits, A.G., Aloy, A.S., Tretyakov, A.A., Knecht, D.A., Tranter, T.J., Sharonova, O.M., Vereshchagina, T.A., Zykova, I.D., Burdin, M.V., Sapozhnikova, N.V., Strelnikov, A.V., and Macheret, J. in Scientific Basis for Nuclear Waste Management XXIV, edited by Hart, Kaye P., Lumpkin, Gregory R., (Mat. Res. Symp. Proc., 663, 2001) pp. 35–42.Google Scholar
8. Anshits, N.N., Salanov, A.N., Vereshchagina, T.A., Kruchek, D.M., Bajukov, O.A., Tretyakov, A.A., Yu.A. Revenko, and Anshits, A.G., Proc. VII Intern. Conf. “Safety of Nuclear Technologies: Radioactive Waste Management”, 27 September - 1 October 2004, Saint-Petersburg. Pro Atom: C.ΠeTep;δyp Γ, 2004. pp. 80–83.Google Scholar
9. Vereshchagina, T.A., Vereshchagin, S.N., Anshits, A. G., Podoynitsin, S. V., M.V.Burdin, Kostin, E.M., and Tranter, T. J., Proc. Intern. Conf. “High-Level Radioactive Waste Management”, 22 March – 2 April 2003, Las-Vegas, NV, USA. - 8 p.Google Scholar
10. 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.Google Scholar