Characterization and adsorption properties of selective adsorbents for high decontamination of cesium

Mimura, Hitoshi*; Yamagishi, Isao 

Large amounts of seawater contaminated with radioactive cesium accumulated in the nuclear accident of Fukushima NPP1. As of December, 2011, the circulating injection cooling system is effectively operated and the cold shutdown is completed, while the amounts of high-activity-level water are estimated to be over 200,000 m in future. However, at present, the treatment and disposal methods for the solid wastes (zeolites, insoluble ferrocyanides and crystalline silicotitanate) are not yet decided. In particular, there is no experience in the treatment and disposal of high decontamination solid materials such as insoluble ferrocyanides and crystalline silicotitanate. Hence the development of effective treatment and disposal methods are very urgent and important subjects. This special issue deals with the characterization and adsorption properties of selective adsorbents for high decontamination of cesium and the subjects for the treatment and disposal of solid wastes.