Japan Geoscience Union Meeting 2015

Presentation information

Print

Oral

Symbol U (Union) » Union

[U-04] Earth and Planetary Science Frontiers for Life and Global Environment

Wed. May 27, 2015 2:15 PM - 4:00 PM 201A (2F)

Convener:*Yohey Suzuki(Graduate School of Science, The University of Tokyo), Takashi Murakami(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Masaya Suzuki(AIST, Geological Survey of Japan), Tadashi Yokoyama(Department of Earth and Space Science, Graduate School of Science, Osaka University), Keisuke Fukushi(Institute of Nature & Environmental Technology, Kanazawa University), Satoshi Mitsunobu(University of Shizuoka, Institute for Environmental Sciences), Chair:Tadashi Yokoyama(Department of Earth and Space Science, Graduate School of Science, Osaka University), Takashi Murakami(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo)

3:15 PM - 3:45 PM

★ [U04-10] Microscopic analyses of radioactive contamination in Fukushima soil

*Hiroki MUKAI1, Satoko MOTAI1, Toshihiro KOGURE1 (1.Graduate School of Science, the University of Tokyo)

Keywords:Fukushima nuclear accident, Contaminated soil, Radioactive cesium, Electron microscope

Since the accident at Fukushima Daiichi Nuclear Plant in 2011, it has been required to trace the behavior of the released radionuclides, particularly the radioactive cesium, in the natural environment. However, in the actual contaminated soil, the radioactive cesium presents in extremely low concentration (~0.1 ppb) which makes it difficult to locate it chemically. Last year, we could successfully identify the radioactive particles in the actual soil using autoradiography with micro-processed imaging plates (IP), and revealed the adsorbents of the radioactive cesium mainly by electron microscopy (Mukai et al., 2014). We are now investigating the distribution of the radioactive cesium in the particles by the combination of autoradiography and micro-processing using focused-ion-beam (FIB). In this talk, these results will be presented.