Adsorption characteristics of cesium on the clay minerals: Structural change under wetting and drying condition

Sang Min Park; Jeshin Lee; Eun Ki Jeon; Seunghee Kang; Md Samrat Alam; Daniel C.W. Tsang; Daniel S. Alessi; Kitae Baek

doi:10.1016/j.geoderma.2018.12.002

Adsorption characteristics of cesium on the clay minerals: Structural change under wetting and drying condition

Sang Min Park, Jeshin Lee, Eun Ki Jeon, Seunghee Kang, Md Samrat Alam, Daniel C.W. Tsang, Daniel S. Alessi, Kitae Baek

Research output: Journal article publication › Journal article › Academic research › peer-review

23 Citations (Scopus)

Abstract

The fate and transport of cesium (Cs ⁺ ) is strongly related to the presence of clay minerals in soils, and their weathering due to natural cycles of wetting and drying. In this study, the adsorption characteristics of Cs ⁺ under repeated wetting and drying conditions were investigated using the 1:1 lattice clay mineral, kaolinite, the non-expanding 2:1 lattice clay mineral, illite, and the expanding 2:1 lattice clay minerals, hydrobiotite and montmorillonite. Unlike the cation exchange capacity of clay minerals (montmorillonite > hydrobiotite > illite > kaolinite), the amount of Cs ⁺ adsorbed followed the order of hydrobiotite > montmorillonite > illite > kaolinite. The expanding 2:1 lattice clay minerals (hydrobiotite and montmorillonite) displayed a fixed d-spacing when Cs ⁺ was adsorbed and dried, after which they had a structure similar to that of illite. The desorption efficiency of Cs ⁺ in illite and montmorillonite also was lowered after drying at 80 °C. Desorption efficiencies of Cs ⁺ in clay minerals were in the order of kaolinite > illite > montmorillonite > hydrobiotite. Therefore, there are differences on desorption efficiencies of Cs according to clay minerals due to each clay mineral structure and characteristics.

Original language	English
Pages (from-to)	49-54
Number of pages	6
Journal	Geoderma
Volume	340
DOIs	https://doi.org/10.1016/j.geoderma.2018.12.002
Publication status	Published - 15 Apr 2019

Keywords

Cesium adsorption
Clay minerals
Expanding
Interlayer fixation
Weathering

ASJC Scopus subject areas

Soil Science

More information

10.1016/j.geoderma.2018.12.002

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abstract = " The fate and transport of cesium (Cs + ) is strongly related to the presence of clay minerals in soils, and their weathering due to natural cycles of wetting and drying. In this study, the adsorption characteristics of Cs + under repeated wetting and drying conditions were investigated using the 1:1 lattice clay mineral, kaolinite, the non-expanding 2:1 lattice clay mineral, illite, and the expanding 2:1 lattice clay minerals, hydrobiotite and montmorillonite. Unlike the cation exchange capacity of clay minerals (montmorillonite > hydrobiotite > illite > kaolinite), the amount of Cs + adsorbed followed the order of hydrobiotite > montmorillonite > illite > kaolinite. The expanding 2:1 lattice clay minerals (hydrobiotite and montmorillonite) displayed a fixed d-spacing when Cs + was adsorbed and dried, after which they had a structure similar to that of illite. The desorption efficiency of Cs + in illite and montmorillonite also was lowered after drying at 80 °C. Desorption efficiencies of Cs + in clay minerals were in the order of kaolinite > illite > montmorillonite > hydrobiotite. Therefore, there are differences on desorption efficiencies of Cs according to clay minerals due to each clay mineral structure and characteristics. ",

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AU - Park, Sang Min

AU - Lee, Jeshin

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AU - Alam, Md Samrat

AU - Tsang, Daniel C.W.

AU - Alessi, Daniel S.

AU - Baek, Kitae

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AB - The fate and transport of cesium (Cs + ) is strongly related to the presence of clay minerals in soils, and their weathering due to natural cycles of wetting and drying. In this study, the adsorption characteristics of Cs + under repeated wetting and drying conditions were investigated using the 1:1 lattice clay mineral, kaolinite, the non-expanding 2:1 lattice clay mineral, illite, and the expanding 2:1 lattice clay minerals, hydrobiotite and montmorillonite. Unlike the cation exchange capacity of clay minerals (montmorillonite > hydrobiotite > illite > kaolinite), the amount of Cs + adsorbed followed the order of hydrobiotite > montmorillonite > illite > kaolinite. The expanding 2:1 lattice clay minerals (hydrobiotite and montmorillonite) displayed a fixed d-spacing when Cs + was adsorbed and dried, after which they had a structure similar to that of illite. The desorption efficiency of Cs + in illite and montmorillonite also was lowered after drying at 80 °C. Desorption efficiencies of Cs + in clay minerals were in the order of kaolinite > illite > montmorillonite > hydrobiotite. Therefore, there are differences on desorption efficiencies of Cs according to clay minerals due to each clay mineral structure and characteristics.

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KW - Weathering

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Adsorption characteristics of cesium on the clay minerals: Structural change under wetting and drying condition

Abstract

Keywords

ASJC Scopus subject areas

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