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Cs washoff from bare land in Fukushima五十嵐 康記*; 恩田 裕一*; 脇山 義史*; 吉村 和也; 加藤 弘亮*; 小塚 翔平*; 馬目 凌*
Science of the Total Environment, 769, p.144706_1 - 144706_9, 2021/05
被引用回数：4 パーセンタイル：18.34(Environmental Sciences)The impact of freeze-thaw processes and subsequent runoff affecting the Cs-137 (Cs) flux and concentration in sediment discharge were revealed in bareland erosion plot following the Fukushima Nuclear Power Plant accident by detailed monitoring and laser scanner measurement on the soil surface. We found that surface topographic changes due to the frost-heaving during the winter- spring period, and rill formation during the summer. We also found the evident seasonal changes in Cs concentration; high during the early spring and gradually decreased thereafter, then surface runoff from the plot frequently occurred during spring and autumn when rainfall was high and reached a maximum in summer.
小塚 翔平*; 斉藤 淳一; 上田 幹人*; 松島 永佳*
no journal, ,
ナトリウムの高純度化技術のひとつとして、イオン液体中に液体ナトリウムを漬けることで液体ナトリウム中の不純物成分である酸素が除去される技術が報告されている。本研究では、液体ナトリウムとイオン液体の反応挙動を観察するとともに、発生するガス成分を分析した。その結果、発生するガスは一酸化炭素と二酸化炭素であることが判明し、それよりガス発生メカニズムを考察した。
Cs wash-off from bareland in Fukushima五十嵐 康記*; 恩田 裕一*; 脇山 義史*; 吉村 和也; 加藤 弘亮*; 小塚 翔平*; 馬目 凌*
no journal, ,
The impact of freeze-thaw processes and subsequent runoff affecting the Cs flux and concentration in sediment discharge were revealed in bareland erosion plot following the Fukushima nuclear power plant accident by detailed monitoring and laser scanner measurement on the soil surface. We found that surface topographic changes due to the frost-heaving during the winter-spring period, and rill formation during the summer. We also found the evident seasonal changes in Cs concentration; high during the early spring and gradually decreased thereafter, then surface runoff from the plot frequently occurred during spring and autumn when rainfall was high and reached a maximum in summer. From these results, the higher Cs concentration in spring was caused by a mixture of unstable surface sediment following freeze- thaw processes and then transported in the early spring, but erosion amount is not significant because of the less rainfall event. The sediment with a lower Cs concentration, which was supplied from the rill erosion and its expansion, was wash-offed during the summer, contributing most of the flux from erosion in bareland in Fukushima region.
