Immobilization of liquid radioactive waste in mineral-like matrices derived from inorganic cenosphere-based sorbents as precursors

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Год издания: 2008

Ключевые слова: Aluminosilicates, Cesium, Feldspar, Industrial waste treatment, Mineralogy, Minerals, Radioactive materials, Radioactive wastes, Radioactivity, Silica, Silicate minerals, Sorption, Zeolites, Cenosphere, Cenospheres, Feldspathoids, Highly efficient, Liquid radioactive wastes, Mild conditions, Optimal ranges, Phase transformations, Practical realizations, Structural types, Synthesis of, Waste forms, Waste management

Аннотация: 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 - 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 NaPl 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. © 2008 Materials Research Society.

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Издание

Журнал: Materials Research Society Symposium Proceedings

Выпуск журнала: Vol. 1107

Номера страниц: 355-363

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