Se(IV) diffusion behavior in illite-montmorillonite mixture

被引：0

作者：

Xiong H.-F. ^{[1
]}

Wang Z.-F. ^{[1
,2
]}

Bao S.-S. ^{[1
]}

Zhou Y.-J. ^{[1
]}

Li J.-Y. ^{[3
]}

Wu T. ^{[1
]}

机构：

[1] School of Engineering, Huzhou University, Huzhou

[2] China Institute of Atomic Energy, Beijing

[3] China Resources Wind Power Development Co., Ltd., Beijing

来源：

Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2017年 / 51卷 / 01期

关键词：

Diffusion behavior; Illite; Montmorillonite; Se(IV);

D O I：

10.7538/yzk.2017.51.01.0013

中图分类号：

学科分类号：

摘要：

The diffusion behavior of Se(IV) (surrogate to 79Se (IV)) in illite-montmorillonite mixture was investigated by through-diffusion method. The results show that the migration of Se(IV) is altered significantly by the illitization of montmorillonite. The effective diffusion coefficient of Se(IV) increases from 3.89×10-11 m2/s to 18.1×10-11 m2/s. When the illite-montmorillonite ratio is in the range of 1∶9 and 5∶5, De values have no obvious change. Whereas, De values increase significantly at illite-montmorillonite ratio of 6∶4, indicating that the predominant composition of the mineral clay plays a leading role in Se(IV) diffusion. When the illite-montmorillonite ratio increases from 1∶9 to 6∶4, the rock capacity and distribution coefficient of Se(IV) decrease from 4.07 to 0.75 and from 22.7×10-4 m3/kg to 1.95×10-4 m3/kg, respectively. Both of them decrease with the increase of illite content. It demonstrates that the hindrance of illite-montmorillonite mixture turns worse due to the weaker sorption of Se(IV) on illite, leading the increase of Se(IV) migration in illite-montmorillonite mixture. © 2017, Editorial Board of Atomic Energy Science and Technology. All right reserved.

引用

页码：13 / 18

页数：5

共 19 条

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