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      Prediction of groundwater contamination with 137Cs and 131I from the Fukushima nuclear accident in the Kanto district.

      Journal of Environmental Radioactivity
      Cesium Radioisotopes, analysis, Disasters, Earthquakes, Geography, Groundwater, History, 21st Century, Iodine Radioisotopes, Japan, Radiation Monitoring, statistics & numerical data, Radioactive Hazard Release, history, Rain, chemistry, Soil, Time Factors, Tsunamis, Water Pollutants, Radioactive

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          Abstract

          We measured the concentrations of (131)I, (134)Cs, and (137)Cs released from the Fukushima nuclear accident in soil and rainwater samples collected March 30-31, 2011, in Ibaraki Prefecture, Kanto district, bordering Fukushima Prefecture to the south. Column experiments revealed that all (131)I in rainwater samples was adsorbed onto an anion-exchange resin. However, 30% of (131)I was not retained by the resin after it passed through a soil layer, suggesting that a portion of (131)I became bound to organic matter from the soil. The (137)Cs migration rate was estimated to be approximately 0.6 mm/y in the Kanto area, which indicates that contamination of groundwater by (137)Cs is not likely to occur in rainwater infiltrating into the surface soil after the Fukushima accident. Copyright © 2011 Elsevier Ltd. All rights reserved.

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