Effect of humic acid contact time on the diffusion of Re（VII） in GMZ bentonite

The effect of humic acid （HA） on the diffusion of Re（VII） was investigated in compacted Gaomiaozi （GMZ） bentonite by the through- and out- diffusion method. The effective diffusion coefficient, De, and accessible porosity, εacc, were measured in order to evaluate the impact of humic acid on Re（VII）...

Full description

Saved in:
Bibliographic Details
Published in:核技术：英文版 2015, Vol.26 (1), p.135-139
Main Author: WANG Hai WU Tao CHEN Jiang FU Bao-Feng ZHAO Xiang-Hai LUO Yong ZHAO Yao-Lin HE Chao-Hui
Format: Article
Language:English
Subjects:
总孔隙率
扩散法
接触时间
有效扩散系数
老化时间
腐植酸
腐殖酸
膨润土
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of humic acid （HA） on the diffusion of Re（VII） was investigated in compacted Gaomiaozi （GMZ） bentonite by the through- and out- diffusion method. The effective diffusion coefficient, De, and accessible porosity, εacc, were measured in order to evaluate the impact of humic acid on Re（VII） diffusion. The De value was in the range of （5.2-8.3）× 10-12 m2/s. The diffusion of Re（VII） was enhanced in the presence of HA, and the/3e value increased with the increase of ageing time, indicating that the formation of HA-Re complexes was slow. Moreover, the eacc was in the range of （0.06- 0.16）, which is less than the total porosity. It implies that the HA-Re complexes are anions.
ISSN:1001-8042
2210-3147