Clay Science
Online ISSN : 2186-3555
Print ISSN : 0009-8574
ISSN-L : 0009-8574
CESIUM SORPTION TO PADDY SOIL IN FUKUSHIMA
EIKO FUJIIKENJI TAMURATAMAO HATTAHIROHISA YAMADATSUYOSHI YAITATOSHIHIRO KOGURE
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2015 Volume 19 Issue 1 Pages 17-22

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Abstract
Cesium (Cs) sorption experiments were conducted using the soil of a paddy field in Fukushima, Japan, to find Cs-sorbing materials in the actual soil. The soil particles were reacted with a CsCl solution for one day, which formed a Cs concentration in the soil particles of around 150 ppm. The Cs-sorbed particles were molded into the form of a disk and Cs distribution on the disk surface was acquired using electron-probe X-ray microanalysis. The Cs-concentrated regions on the disk were further confirmed using scanning electron microscopy, and thin film specimens for transmission electron microscopy (TEM) were prepared using a focused-ion-beam instrument. TEM with X-ray microanalysis revealed that the major Cs-sorbing materials were biotite-vermiculite (B-V) mixed-layer mineral and aluminous smectite containing considerable amounts of iron. The B-V mixed layer mineral incorporated cesium ions at the interlayer regions which were probably originally hydrated ones. The structure and Cs-adsorption/desorption properties of the smectite should be investigated in future.
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© 2015 The Clay Science Society of Japan
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