Implications of analcime hydrothermally formed from Na-alumino-borosilicate glasses containing Cs and Sr for the stability of high-level radioactive waste form

被引：2
作者：
Sohn, W
Shoji, T
Kaneda, H
Ishii, T
机构：
[1] Univ Tokyo, Sch Engn, Dept Geosyst Engn, Bunkyo Ku, Tokyo 1138656, Japan
[2] Univ Tokyo, Sch Frontier Sci, Dept Environm Syst, Bunkyo Ku, Tokyo 1130033, Japan
[3] Univ Tokyo, Div Ocean Floor Geotect, Ocean Res Inst, Nakano Ku, Tokyo 1648639, Japan
来源：
RESOURCE GEOLOGY | 2003年 / 53卷 / 01期
关键词：
radioactive waste; borosilicate glass; alteration; analcime-type zeolite; cesium; strontium;
D O I：
10.1111/j.1751-3928.2003.tb00157.x
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
In order to know the behaviors of radioactive elements such as cesium and strontium during a hydrothermal alteration of borosilicate glass of radioactive waste, some alumino-borosilicate glasses belonging to the systems Na2O-Al2O3-B2O3-SiO2-SrO, Na2O-Al2O3-B2O3-SiO2-Cs2O and Na2O-Al2O3-B2O3-SiO2-SrO-Cs2O have been treated hydrothermally at 200degreesC under a vapor pressure of 1.54 MPa. The result shows that all glasses are changed into crystalline phases with running time up to 60 days, and that analcime-type zeolite is formed as a major product. The formed zeolite is shown to contain cesium and/or strontium. Considering the fact that natural zeolite occurs in wide physicochemical conditions including hydrothermal one, the analcime-type zeolite is expected to fix stably the radioactive elements in the disposal site. Since aluminum is necessary for the formation of the analcime-type zeolite, the waste glass should have aluminum as one of major components.
引用
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页码：51 / 59
页数：9
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