Enhanced desorption of cesium from collapsed interlayer regions in vermiculite by hydrothermal treatment with divalent cations

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• 作者：Xiangbiao Yin^a ; ^{yin.x.aa@m.titech.ac.jp} ; ^{xiangbiaoivan@163.com} ; Xinpeng Wang^b ; Hao Wu^a ; Toshihiko Ohnuki^a ; Kenji Takeshita^a
• 关键词：Decontamination ; Cesium ; Desorption ; Vermiculite ; Interlayer collapse
• 刊名：Journal of Hazardous Materials
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：326
• 期：Complete
• 页码：47-53
• 全文大小：1198 K
• 卷排序：326

文摘

Desorption of Cs+ fixed in collapsed interlayer region of vermiculite was studied. Monovalent cations readily induced interlayer collapse inhibiting Cs+ desorption. Larger hydrous ionic radii of divalent cations greatly prevented Cs+ desorption. Effect of divalent cation on Cs+ desorption changes depending on thermal treatment. ∼100% removal of saturated Cs+ was achieved by hydrothermal treatment at 250 °C.