Effect of dry density and pH on the diffusion behavior of lanthanum in compacted Chinese GMZ bentonite

被引：8

作者：

Chen, Yonggui ^{[1
,2
,3
,4
]}

Jia, Lingyan ^{[1
,2
]}

Niu, Lihui ^{[1
,2
]}

Ye, Weimin ^{[1
,2
]}

Chen, Bin ^{[4
]}

Cui, Yujun ^{[5
]}

机构：

[1] Tongji Univ, Key Lab Geotechn & Underground Engn, Minist Educ, Shanghai 200092, Peoples R China

[2] Tongji Univ, Dept Geotechn Engn, Shanghai 200092, Peoples R China

[3] Changsha Univ Sci & Technol, Sch Civil Engn & Architecture, Changsha 410114, Hunan, Peoples R China

[4] Xiangtan Univ, Hunan Key Lab Geomechan & Engn Safety, Xiangtan 411105, Peoples R China

[5] CERMES, Ecole Ponts ParisTech, Lab Navier, F-77455 Marne La Vallee, France

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2016年 / 310卷 / 03期

基金：

中国国家自然科学基金;

关键词：

GMZ bentonite; Lanthanum; Diffusion; High-level radioactive waste; Deep geological disposal; HYDROMECHANICAL BEHAVIOR; ADSORPTION; KNOWLEDGE; SORPTION; EU(III); CATIONS; SE(IV); TIME;

D O I：

10.1007/s10967-016-4972-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Diffusion experiments in compacted GaoMiaoZi (GMZ) bentonite were performed with La(III) using the in-diffusion method, and the effects of dry density and pH were emphasized. The apparent diffusion coefficient (D (a)) was obtained at the end of the experiment. D (a) decreases with increasing dry density of 1.3-1.7 Mg m(-3) as well as slightly decreases as pH increases from 3.6 to 8.9. The D (a) range is (2-16) x 10(-12) m(2) s(-1) under the experimental conditions. The distribution coefficients (K (d)) for La(III) in compacted GMZ bentonite are much smaller than those on powdered bentonite obtained from batch experiments.

引用

页码：1303 / 1310

页数：8

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