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 publicationJournal articleAcademic researchpeer-review

6 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 languageEnglish
Pages (from-to)49-54
Number of pages6
JournalGeoderma
Volume340
DOIs
Publication statusPublished - 15 Apr 2019

Keywords

  • Cesium adsorption
  • Clay minerals
  • Expanding
  • Interlayer fixation
  • Weathering

ASJC Scopus subject areas

  • Soil Science

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