Stable solidification of cesium with an allophane additive by a pressing/sintering method
Stable solidification of cesium with an allophane additive by a pressing/sintering method
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通过压制/烧结法用水铝英石添加剂稳定铯凝固
DOI:
10.1016/j.jnucmat.2016.12.029
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发表时间:
2017-03
影响因子:
3.1
通讯作者:
Matsukura Minoru
中科院分区:
文献类型:
--
作者:
Zhang Xiaoxia;Wu Yan;Wei Yuezhou;Mimura Hitoshi;Matsukura Minoru
Pyrolysis of AMP/SiO2adsorbed Cs (AMP-Cs/SiO2) occurred at > 400 °C sintering temperature, and Cs immobilisation decreased from 100% to 40% after sintering at 1200 °C. To safely dispose radioactive Cs, allophane was immobilized with AMP-Cs/SiO2to prepare a stable form by using a pressing/sintering method. The structure of AMP-Cs/SiO2collapsed, and cesium aluminosilicate formed more easily under conditions of higher sintering temperature (>800 °C) or increasing mixing ratio of allophane (mass ratio = 1:3 AMP-Cs/SiO2-allophane). The decomposition products of AMP-Cs/SiO2were Cs2O, MoO3and P2O5at 1200 °C. Cs2O volatilisation was depressed by allophane addition, and a stable immobilisation phase of Cs4Al4Si20O48formed. An immobilisation ratio of Cs of approximately 100% was maintained. The leachability of Cs for AMP-Cs/SiO2-allophane (1:3, 1200 °C) in distilled water at 25 °C and 90 °C for 15 days was estimated as 0.174% and 1.55%, respectively.
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影响因子:
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作者:
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通讯作者:
C. Rocchiccioli-deltcheff;A. Aouissi;M. Bettahar;S. Launay;M. Fournier
影响因子:
8.1
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