Diffusion of La3+ in Compacted GMZ Bentonite Used as Buffer Material in HLW Disposal

被引：2
|
作者：
Chen, Yonggui [1 ,2 ]
Niu, Lihui [1 ]
He, Yong [1 ,2 ]
Ye, Weimin [1 ]
Zhu, Chunming [1 ]
机构：
[1] Tongji Univ, Shanghai 200092, Peoples R China
[2] Changsha Univ Sci & Technol, Changsha 410114, Hunan, Peoples R China
来源：
ENGINEERING GEOLOGY FOR SOCIETY AND TERRITORY, VOL 6: APPLIED GEOLOGY FOR MAJOR ENGINEERING PROJECTS | 2015年
关键词：
GMZ bentonite; Diffusion property; Lanthanum ion; PH;
D O I：
10.1007/978-3-319-09060-3_91
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
It has been studied that the GMZ bentonite which has a chemical barrier property can play an important role in retarding the migration of radioactive nuclide. In order to understand the diffusion properties of nuclide in GMZ bentonite, a series of experiments were conducted to obtain the apparent diffusion coefficient of La3+ in GMZ bentonite under different dry density and pH value conditions using a autonomous ion diffusion instrument. The results show that the apparent diffusion coefficient of La3+ decreases significantly with the increasing dry density or pH value. The influence of dry density on the diffusion is very apparent for a low dry density, and the influence gradually slow down with the increase of dry density. At last the influence mechanism of the dry density and pH value on diffusion coefficient was also analyzed.
引用
收藏
页码：515 / 517
页数：3
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