Speciation of Radioactive Soil Particles in the Fukushima Contaminated Area by IP Autoradiography and Microanalyses
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- Hiroki Mukai
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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- Tamao Hatta
- Japan International Research Center for Agricultural Sciences, 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan
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- Hideaki Kitazawa
- Quantum Beam Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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- Hirohisa Yamada
- Environmental Remediation Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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- Tsuyoshi Yaita
- Quantum Beam Science Center and Fukushima Environmental Safety Center, Japan Atomic Enegy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
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- Toshihiro Kogure
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
書誌事項
- 公開日
- 2014-11-10
- 資源種別
- journal article
- DOI
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- 10.1021/es502849e
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
Radioactive soil particles several tens of micrometers in size were collected from litter soil in the radiation contaminated area by the Fukushima nuclear plant accident and characterized using electron and X-ray microanalyses. The radioactive particles were discriminated by autoradiography using imaging plates (IP) on which microgrids were formed by laser ablation in order to find the particles under microscopy. Fifty radioactive particles were identified and classified into three types from their morphology and chemical composition, namely: (1) aggregates of clay minerals, (2) organic matter containing clay mineral particulates, and (3) weathered biotite originating from local granite. With respect to the second type, dissolution of the organic matter did not reduce the radiation, suggesting that the radionuclides were also fixed by the clay minerals. The weathered biotite grains have a plate-like shape with well-developed cleavages inside the grains, and kaolin group minerals and goethite filling the cleavage spaces. The reduction of the radiation intensity was measured before and after the trimming of the plate edges using a focused ion beam (FIB), to examine whether radioactive cesium primarily sorbed at frayed edges. The radiation was attenuated in proportion to the volume decrease by the edge trimming, implying that radioactive cesium was sorbed uniformly in the porous weathered biotite.
収録刊行物
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- Environmental Science & Technology
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Environmental Science & Technology 48 (22), 13053-13059, 2014-11-10
American Chemical Society (ACS)
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キーワード
- Minerals
- Spectrometry, X-Ray Emission
- Soil
- Microscopy, Electron, Transmission
- X-Ray Diffraction
- Gamma Rays
- Microscopy, Electron, Scanning
- Autoradiography
- Fukushima Nuclear Accident
- Soil Pollutants, Radioactive
- Aluminum Silicates
- Particulate Matter
- Ferrous Compounds
- Environmental Pollution
- Iron Compounds
詳細情報 詳細情報について
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- CRID
- 1360002216640375040
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- ISSN
- 15205851
- 0013936X
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- PubMed
- 25343443
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- 資料種別
- journal article
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- データソース種別
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- Crossref
- KAKEN
- OpenAIRE
