{"title":"Investigation of plutonium adsorption by geological materials in China’s radioactive waste repository disposal environment","authors":"Yang-chun Leng, Jin-cai Feng, Qiao Jiang, Ze-hua Li, Hao-xin Feng","doi":"10.1007/s10967-024-09702-4","DOIUrl":null,"url":null,"abstract":"<div><p>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 Fe<sup>3+</sup> was ascribed to the immobilization of Fe<sup>3+</sup> hydrolysis products and competitive adsorption. Simultaneously, Pu(IV) formed complexes with both CO<sub>3</sub><sup>2−</sup> and HCO<sup>3−</sup>, hindering the adsorption. Consequently, it is recommended that radioactive waste repositories maintain a low-carbon and iron-salt environment.</p></div>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10967-024-09702-4","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
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.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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