植物が混入した放射性セシウム汚染土壌の多段階土壌洗浄処理試験

  • 舟川 将史
    (株)竹中工務店 環境エンジニアリング本部 (株)竹中工務店 環境エンジニアリング本部
  • 田川 明広
    (独)日本原子力開発機構 福島技術本部 (独)日本原子力開発機構 福島技術本部
  • 奧田 信康
    (株)竹中工務店 技術研究所 (株)竹中工務店 技術研究所

書誌事項

タイトル別名
  • Testing of Multistep Soil Washing for Radiocesium-Contaminated Soil Containing Plant Matter
  • ショクブツ ガ コンニュウ シタ ホウシャセイ セシウム オセン ドジョウ ノ タダンカイ ドジョウ センジョウ ショリ シケン

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説明

  Decontamination work following radiocesium exposure requires a vast reduction in the amount of contaminated soil generated. The current study subjected 4 types of contaminated soil with different properties to multistep soil washing under the same conditions. This study also determined the effectiveness of radiocesium decontamination and the extent to which the amount of contaminated soil was reduced. In addition, the effectiveness of plant matter separation, adsorbent addition, and grinding as part of multistep soil washing was determined using the same contaminated soil. Results of testing indicated that the rate of radiocesium decontamination ranged from 73.6 to 89.2% and the recovery rate ranged from 51.5 to 84.2% for twice-treated soil, regardless of the soil properties or cesium level. Plant matter in soil had a high radiocesium level. However, there was little plant matter in our soil sample. Therefore, plant matter separation had little effect on the improvement in the percentage of radiocesium decontamination of twice-treated soil. Soil surface grinding improved the rate of radiocesium decontamination of twice-treated soil. However, radiocesium in soil tightly bound with minerals in the soil; thus, the addition of an adsorbent also failed to improve the rate of radiocesium decontamination.<br>

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