Structural analyses of cesium ions adsorbed on clay minerals and attempts of the desorption

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760688
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Earth system and resources enginnering
• Research Institution: National Institute of Advanced Industrial Science and Technology (2014); Ehime University (2012-2013)
• Principal Investigator: MORIMOTO KAZUYA 独立行政法人産業技術総合研究所, 地圏資源環境研究部門, 研究員 (10565683)
• Research Collaborator: KOGURE Toshihiro ; TAMURA Kenji ; SATO Hisako ; YAMAGISHI Akihiko
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: イオン交換反応 / セシウムイオン / マグネシウムイオン / 汚染土壌 / 粘土鉱物 / 除染

Outline of Final Research Achievements

Since the explosion accident at the Fukushima nuclear power plant, decontamination of a huge amount of soil polluted with radioactive cesium became the urgent issue. These Cs isotopes stay as ions in the soils near the ground surface for a long period, since they are strongly fixed in the interlayer spaces of clay minerals. Because vermiculite clay has an extremely high adsorption capacity for Cs ions compared to other minerals, it can play an important role in the environmental fate of radioactive cesium in the polluted area. In the present work, we have elucidated the state of Cs ions fixed in a vermiculite clay, and examined the possibility of desorption of Cs ions.

Free Research Field

粘土鉱物学