2013 Fiscal Year Final Research Report

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

Research Project

Project/Area Number	24654171
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Single-year Grants
Research Field	Petrology/Mineralogy/Science of ore deposit
Research Institution	Niigata University
Principal Investigator	AKAI Junji 新潟大学, 自然科学系, フェロー (30101059)
Project Period (FY)	2012-04-01 – 2013-03-31
Keywords	放射性セシウム / 環境 / 再循環 / バクテリア / 吸収 / 粘土鉱物 / 動態
Research Abstract	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.