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Static Adsorption of Cesium Ions on Kaolin/Vermiculite and Dynamic Adsorption/Desorption Using the Electrokinetic Process

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Title: Static Adsorption of Cesium Ions on Kaolin/Vermiculite and Dynamic Adsorption/Desorption Using the Electrokinetic Process
Authors: Akemoto, Yasuhiro Browse this author
Kan, Masahiko Browse this author
Tanaka, Shunitz Browse this author →KAKEN DB
Keywords: Electrokinetic Process
Cesium Ion
Clay Mineral
Adsorption
Sequential Extraction Analysis
Issue Date: Jul-2019
Publisher: 化学工学協会
Journal Title: Journal of chemical engineering of Japan
Volume: 52
Issue: 7
Start Page: 662
End Page: 669
Publisher DOI: 10.1252/jcej.18we312
Abstract: The interactions between cesium Ions and two kinds of 2:1 clay minerals (kaolin and vermiculite) were investigated under batch conditions and dynamic equilibrium using the electrokinetic (EK) process. The adsorption capacities of kaolin and vermiculite were 1.2 and 18.8 mg/g, respectively, at pH 6 after 24h in the batch system. Because the basal spacing of kaolin is 0.93 nm, Cs+ ions cannot enter the interlayers. On the other hand, the basal spacing of vermiculite is 1.01 nm, and vermiculite can adsorb Cs+ ions in the interlayers. Four kinds of model soils with different ratios of vermiculite to kaolin were prepared by mixing these two types of clay minerals, and the migration behaviors of Cs+ ions in these soils on the application of the EK process were determined. The Cs+ ion migration efficiency decreased with an increase in vermiculite content. The content of vermiculite in the soil was an important factor determining the migration behavior of Cs+ ions under the dynamic equilibrium conditions produced by the EK process. The applications and limitations of the EK process for the removal of cesium from contaminated soil are discussed.
Type: article
URI: http://hdl.handle.net/2115/75654
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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