<b>High Level of Cesium-137 Concentration in Road Dust Samples </b><b>Collected in the Eastern Area of Japan </b>

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  • OZAKI Hirokazu
    Center for Higher Educational Development, Tokyo University of Agriculture and Technology
  • TAKAHASHI Hiroyuki
    Department of Environmental Biosphere, Tokyo University of Agriculture and Technology
  • WATAI Chie
    Department of Environmental Biosphere, Tokyo University of Agriculture and Technology
  • INAMOCHI Riko
    Department of Environmental Biosphere, Tokyo University of Agriculture and Technology
  • NAGASHIMA Taiga
    Department of Environmental Biosphere, Tokyo University of Agriculture and Technology
  • GOMI Takashi
    Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology
  • WATANABE Izumi
    Department of Environmental Biosphere, Tokyo University of Agriculture and Technology

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Other Title
  • 東日本各地で採取された道路脇粉塵における高濃度のセシウム-137
  • ヒガシニホン カクチ デ サイシュ サレタ ドウロ ワキ フンジン ニ オケル コウノウド ノ セシウム-137
  • High level of cesium-137 concentration in road dust samples collected in the eastern area of Japan

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<p>Road dust samples were collected at 67 places located between 6.5 and 240 km away from Fukushima Daiichi Nuclear Power Plant in the 10 prefectures of eastern Japan. The dust samples collected from August 2013 to December 2014 demonstrated 21.6 and 50300 Bq/kg for the lowest and highest 137Cs concentration respectively, and 18200 and 1290 Bq/kg for its average and median values. The range of the concentrations was significantly higher than those of surface soils in crop field, grassland and fruit farm in the 50 km area of the nuclear power plant. The spatial distribution of 137Cs concentration in road dust was consistent with the diffusion path of the radioactive plume. These facts reveal that road dust is an effective media for monitoring 137Cs contamination. Road dust may play one of dominant factors of 137 Cs distribution and important role in investigating its environmental behavior because it is discharged via drainage to river system and may eventually reach to ocean.</p>

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