Download file (5.85MB)
Download as zip (5.36MB)

コレクション

引用

説明:

A decrease in the desorption rate of Cs+ from natural sediment was observed with increasing Cs+ sorption time. This aging effect poses a serious issue as it hinders the removal of radioactive cesium ions from natural sediments. In this study, adsorption and desorption experiments and molecular simulations were conducted on artificially weathered hydroxy-Al-interlayered clay minerals to elucidate the mechanism underlying this aging effect. The proposed aging mechanism of Cs+ in hydroxy-Al-interlayered clay minerals involves two steps: (1) Cs+ penetrates the interlayer space, which is expanded by the presence of hydroxy-Al segments, and (2a) it gradually migrates into the collapsed zone or (2b) into the inner hydroxy-Al layers. The structure of the (2b) model can explain the presence of five-fold coordination of Al, and the stability of Cs+ in the hydroxy-Al sheets was evaluated using density functional theory calculations.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Cesium, phlogopite, vermiculite, NMR, molecular dynamics, DFT

刊行年月日: 2026-03-03

出版者: American Chemical Society (ACS)

掲載誌:

• LANGMUIR (ISSN: 15205827) vol. 42 issue. 8 p. 6081-6090

研究助成金:

• Japan Society for the Promotion of Science JP22K05204
• Environmental Restoration and Conservation Agency JPMEERF20191006

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.langmuir.5c05291

関連資料:

その他の識別子:

連絡先:

更新時刻: 2026-03-05 16:30:12 +0900

MDRでの公開時刻: 2026-03-05 13:42:52 +0900