Challenge of purification of Cs-contaminated soils based on knowledge of microbe-mineral interaction

福岛县地表环境放射性铯污染严重，了解放射性铯在环境中的再循环情况十分重要。在这一过程中，微生物-矿物相互作用将发挥重要作用。通过对许多含有微生物-矿物相互作用的组成物质的研究，阐明了细菌在细菌体内强烈地积累Cs。积累 以及Cs在粘土矿物和有机质中的溶解。透射电镜直接观察到铯在细菌体内的积累。澄清了两种类型的积累。在其他实验结果的基础上，根据提出的模型图讨论了未来铯在环境中的再循环。

Contamination of radioactive Cs for surface environment is serious in Fukushima Prefecture.It is important to know how the Cs will recirculate in the environment. In the processes, microbe-mineral interaction will play a significant role. Examining many constituent materials containing microbe-mineral interaction, it was clarified that bacteria strongly accumulate Cs in bacterial body. Accumulation and dissolution of Cs in caly minerals and organic materials were also experimentally examined. The accumulation of Cs in the bacteria was directed observed by TEM. Accumulation of two types was clarified. Based on other experimental results, future re-circulation of Cs in the environment was discussed based on a proposed model figure.