Investigation of plutonium adsorption by geological materials in China's radioactive waste repository disposal environment

被引：3
作者：
Leng, Yang-chun [1 ]
Feng, Jin-cai [2 ]
Jiang, Qiao [3 ]
Li, Ze-hua [1 ]
Feng, Hao-xin [1 ]
机构：
[1] Southwest Univ Sci & Technol, Sch Natl Def Sci & Technol, Mianyang 621000, Sichuan, Peoples R China
[2] Yangjiang Nucl Power Co Ltd, Yangjiang 529500, Guangdong, Peoples R China
[3] Chengdu Univ Technol, Coll Nucl Technol & Automat Engn, Chengdu 610059, Sichuan, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2024年 / 333卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Plutonium-239; Radioactive repository disposal; Clay rock; Bentonite; PORE-WATER; BEHAVIOR; SORPTION; PU; MONTMORILLONITE; DESORPTION; MIGRATION; PU(IV); AM; NP;
D O I：
10.1007/s10967-024-09702-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The investigation elucidated the impact of pH and ions on the adsorption behavior of Pu(IV) by clay rock and bentonite, two pivotal geological barriers for disposal. Pu(IV) adsorption demonstrated a pronounced dependence on pH. In acidic environments, the adsorption of both clay rock and bentonite was markedly inhibited. Various ions exhibited inhibitory effects on the adsorption. Specifically, the inhibitory effect of Fe3+ was ascribed to the immobilization of Fe3+ hydrolysis products and competitive adsorption. Simultaneously, Pu(IV) formed complexes with both CO32- and HCO3-, hindering the adsorption. Consequently, it is recommended that radioactive waste repositories maintain a low-carbon and iron-salt environment.
引用
收藏
页码：5639 / 5651
页数：13
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