The diffusion behavior of Re(VII) in bentonite with low porosity

被引：0
|
作者：
Chen, Weitong [1 ]
Chen, Dongyang [1 ]
Chen, Xinyu [1 ]
Wang, Jintao [1 ]
Wang, Weiran [1 ]
Wang, Zhifen [1 ]
机构：
[1] East China Univ Technol, Jiangxi Prov Nucl Radiat Detect & Applicat Engn R, Nanchang 330013, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2025年 / 334卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Re(VII); Bentonite with low porosity; Capillary method; Diffusion parameter; PRECIPITATION; (TCO4-)-TC-99; SE(IV);
D O I：
暂无
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The diffusion behavior of Re(VII) in bentonite with low porosity was investigated by the capillary method at different SO42- concentrations, dry densities, pH values and ionic strengths. The batch experiment results revealed that the D-a values decreased with increasing SO42- concentration and dry density. This is mainly due to CaSO4 precipitation blocking pore water channels to form low-porosity bentonite, and the porosity of bentonite with low porosity decreases as the dry density increases. In contrast, the influence of pH on the diffusion behavior of Re(VII) is relatively small. Moreover, the D-a values increase as the ionic strength increases because the free water pore channels widen.
引用
收藏
页码：525 / 533
页数：9
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