The adsorption pattern of radioactive cesium in the soil of litter removed secondary forests and agricultural fields

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  • 林床処理を行った二次林と畑地の放射性セシウムの土壌吸着様式
  • リンショウ ショリ オ オコナッタ ニジリン ト ハタチ ノ ホウシャセイ セシウム ノ ドジョウ キュウチャク ヨウシキ

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The adsorption pattern of radioactive cesium (137Cs) in soil of forests and agricultural fields derived from Fukushima Daiichi NPP accident was investigated using sequential extraction experiment. There was little soluble 137Cs. Exchangeable and organic matter bound 137Cs were 13% in organic horizon and 9% in surface of mineral soil in agricultural fields, whereas 3% and 2% respectively in forests. Most of 137Cs hardly move in ecosystem regardless of the organic matter content. Radioactivity of 137Cs in the surface of mineral soil was decreased by organic matter removal, but the ratio of exchangeable and organic matter bound 137Cs increased.

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