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    Полное описание

    Paul Scherrer Institut (Villigen).
    Bericht / Paul Scherrer Institut. - Villigen : PSI, 19 - . - Текст : непосредственный.
    Nr. 14-03 : Radionuclide uptake by calcium silicate hydrates: case studies with Th(IV) and U(VI) / J. Tits [et al.]. - 2014. - 83 p. : ill. - Библиогр.: с. 77-83

    ГРНТИ УДК
    31.15.23544.58

    Рубрики:
    Радиохимия

    Аннотация: The immobilization of Th(IV) and U(VI) by C-S-H phases has been investigated under conditions relevant to the cementitious near field of a nuclear waste repository. To this end, C-S-H phases were synthesized using two different procedures: the “direct reaction” method and the “solution reaction” method. The solids were characterized with respect to their solid and equilibrium solution compositions and specific surface area. The solubility limits of Th(IV) and U(VI) in alkaline solutions (presence of precipitates or colloidal material) were studied, and the outcome was compared with the results of speciation and solubility calculations assuming the presence of combinations of different solid Th(IV) and U(VI) phases. The solid phases controlling Th(IV) and U(VI) solubility were found to be ThO2(s) and CaUO4(s), respectively. The Th(IV) and U(VI) sorption and co-precipitation kinetics on C-S-H phases with different CaO:SiO2 ratios were determined.
    Доп. точки доступа:
    Tits, J.
    Fujita, T.
    Harfouche, M.
    Dahn, R.
    Tsukamoto, M.
    Paul Scherrer Institut(Villigen)
    Экз-ры полностью 5b208d8b7925310acfb2fe26dc0f74c7
    Нет сведений об экземплярах
    Держатели документа:
    Государственная публичная научно-техническая библиотека России : 123298, г. Москва, ул. 3-я Хорошевская, д. 17 (Шифр в БД-источнике (KATBW): R/17812/14-03)

    Шифр в сводном ЭК: 5b208d8b7925310acfb2fe26dc0f74c7