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

Published online by Cambridge University Press:  01 February 2011

Tatiana A. Vereshchagina ,
Nataly N. Anshits ,
Elena V. Fomenko ,
Sergei N. Vereshchagin  and
Alexander G. Anshits
Tatiana A. Vereshchagina
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx Street, Krasnoyarsk, 660036, Russia Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041, Russia
Nataly N. Anshits
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx Street, Krasnoyarsk, 660036, Russia Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041, Russia
Elena V. Fomenko
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx Street, Krasnoyarsk, 660036, Russia
Sergei N. Vereshchagin
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx Street, Krasnoyarsk, 660036, Russia Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041, Russia
Alexander G. Anshits
Affiliation:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx Street, Krasnoyarsk, 660036, Russia Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041, Russia
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1107: Scientific Basis for Nuclear Waste Management XXXI , 2008 , 355
Copyright
Copyright © Materials Research Society 2008

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References

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