Cs sorption-desorption mechanisms on clay minerals by XAFS, STXM, DFT calculation methods

XAFS、STXM、DFT計算による粘土鉱物へのCs吸脱着挙動

矢板 毅

Yaita, Tsuyoshi

Three years have passed since Fukushima Dai-ichi Nuclear Power Plant (FDNP) Accident, a serious contamination problem still remains in Fukushima. Especially, the Cs in soil is one of the main sources to increase the air dose in Fukushima. Therefore, Japanese and local governments promotes the decontamination projects in which contaminated surface soil is removed and then, is moved it to interim storage area. Since soil waste is extremely large and space of an interim storage is limited, suitable waste reduction method would be required, also in anticipation of final disposal of the waste after about 30 years. On these backgrounds, we have performed elucidation of the sorption-desorption behaviors of Cs on clay minerals by XAFS, STXM, and theoretical calculation methods, aiming at soil waste volume reduction in Fukushima.