日本地球惑星科学連合2014年大会

講演情報

インターナショナルセッション(ポスター発表)

セッション記号 A (大気海洋・環境科学) » A-GE 地質環境・土壌環境

[A-GE03_30PO1] Subsurface Mass Transport and Environmental Assessment

2014年4月30日(水) 14:00 〜 15:15 3階ポスター会場 (3F)

コンビーナ:*森 也寸志(岡山大学大学院環境生命科学研究科)、斎藤 広隆(東京農工大学大学院農学研究院)、川本 健(埼玉大学大学院理工学研究科)、濱本 昌一郎(東京大学大学院農学生命科学研究科)、張 銘(産業技術総合研究所地圏資源環境研究部門)

14:00 〜 15:15

[AGE03-P04] 福島第一原子力発電所事故後の森林土壌におけるCs移動のモニタリング事例

*西村 拓1 (1.東京大学)

キーワード:セシウム, 森林, 土壌有機物, コロイド

Cesium is a large atom which does not likely to hydrate. Similar to potassium and ammonium cation it prefers to site at siloxane ditrigonal cavity of silica sheet of phyllosilicates. Cesium is strongly, almost irreversibly, captured at frayed edge site of layered clay particles. These facts may make partition coefficient of cesium to be very large. The large partition coefficient may produce larger retardation of cesium transport with percolating water. At the same time large partition coefficient may cause enhance in migration of Cs with moving colloids. A comparison of Cs content distribution of near surface soil of between cleared forestry and a forestry with 5cm litter layer in Iitate village, Fukushima suggested organic colloids could be a transporter of Cs at litter covered forest. Soil total carbon content as well as C/N ratio had relation with soil Cs content. A depth where soil had higher organic carbon and lower C/N ratio tended to show high Cs content.