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Investigation of cesium adsorption on soil and sediment samples from Fukushima Prefecture by sequential extraction and EXAFS technique
cesium adsorption clay minerals sequential extraction extended X-ray absorption fine structure (EXAFS) Fukushima
2017/4/11
Previous studies have shown that radiocesium (mainly 137Cs) was retained at the very surface of soils in Fukushima
Prefecture. Clay minerals and micas are assumed as the main sorbents for cesium (Cs)...
Vertical profiles of Iodine-131 and Cesium-137 in soils in Fukushima Prefecture related to the Fukushima Daiichi Nuclear Power Station Accident
Iodine-131 Cesium-137 clay minerals humic substances Fukushima
2017/4/11
Vertical profiles of iodine-131 and cesium-137 emitted from the Fukushima Daiichi Nuclear Power Station were determined
in soil core samples collected in Fukushima prefecture. The profiles showed tha...
Effect of Illite Particle Shape on Cesium Sorption
Cesium Sorption Distribution Coefficient Illite Particle Shape
2011/12/8
Abstract: Samples containing illite and illite-smectite, having different crystal shapes (plates, “barrels”, and filaments), were selected for sorption experiments with cesium. There is a positive cor...
An Aluminum Pillared Montmorillonite with Fast Uptake of Strontium and Cesium from Aqueous Solutions
Cation Exchange Capacity Delamination Pillared Clay Radiocesium Radiostrontium Uptake
2011/12/22
Abstract: The uptake of Sr and Cs by 2 types of aluminum pillared layered clays (Al-PILC), a reference sample (AZA) and a specially tailored sample (FRAZA), were investigated. The AZA sample was prepa...
Sorption parameters are important components of models used to predict mass transport through dense or compacted earthen materials. These parameters are, however, generally determined in batch tests w...
Sorption, Desorption, and Isotope Exchange of Cesium (10−9–10−3 M) on Chlorite
Acid treatment Cation exchange Cesium Chlorite Isotope exchange Sorption
2012/1/13
Batch cation-exchange experiments were performed on chlorite, using synthetic ground water containing cesium in the concentration range 10−9–10−3 M. The sorption behavior was complex; with...
Formation of Highly Selective Cesium-Exchange Sites in Montmorillonites
Cation exchange Cation selectivity Cesium Hofmann-Klemen effect Montmorillonite Wetting-drying
2012/2/1
Ion-exchange sites with very high selectivity for Cs ( ΔG Ca 2+ Cs + = 40 kJ/eq) similar to illite were generated in a controlled way in montmorillonites by (1) repeated wetting-drying cycles and by (...
Hydrothermal Reactions of Clay Minerals and Shales with Cesium Phases from Spent Fuel Elements
Cesium Hydrothermal Illite Nuclear waste Pollucite Shale Uranium
2012/2/8
The immobilization of soluble Cs from spent fuel elements by ion exchange and direct chemical reaction with clay minerals or shales was investigated under hydrothermal conditions. Various clay mineral...
Kaolins: Sources of Differences in Cation-Exchange Capacities and Cesium Retention
Cation-exchange capacity Cs retention Interlayer wedges Kaolinite Vermiculite
2012/2/9
Seven kaolins from Georgia (southeastern U.S.A.), ranging from high to low commercial grade, were characterized by X-ray powder diffraction and chemical techniques to establish that the variation in q...
Hydrothermal Effects on Cesium Sorption and Fixation by Clay Minerals and Shales
Cesium Hydrothermal Illite Ion fixation Ion sorption Shale Vermiculite Waste repository
2012/2/8
The effects of hydrothermal conditions on the sorption and fixation of cesium by various clay minerals and shales were investigated. Hydrothermal heating, which may be expected in a radioactive waste ...
Selectivity Effect of Cesium on Clay Size Weathered Mica; Transmission Electron Microscopy Studies
Selectivity Effect Cesium Clay Size Mica Transmission Electron Microscopy Studies
2012/2/17
The use of electron diffraction contrast to detect local concentrations of interlayer cations in mica-vermiculites was examined. Cs and Mg, because of their contrasting atomic scattering amplitudes fo...
Potassium and Cesium Ion Selectivity in Relation to Clay Mineral Structure
Potassium Cesium Ion Selectivity Clay Mineral Structure
2011/11/17
Abstract: Selectivity of a number of vermiculites, montmorillonites and micas for K and Cs ions was determined by sorption of these ions from equilibrium solutions of diverse concentrations. The selec...