Development of technology for separating and recovering only fine particles are adsorbed radioactive material, to weight loss significantly.

The 13th , sludge and topsoil , from incinerator ash of fields out decontamination work of TEPCO Fukushima Daiichi nuclear accident , group soil improvement and venture Kyoto such as " Earth" is only fine particles are adsorbed radioactive material today announced that it has developed a technology to separate and recover , to weight loss significantly . Are " likely to substantially reduce the amount of waste requiring storage Using this technology is there ," said ( marine biological function studies ) Fengyuan Associate Professor of Kyoto University Graduate School of Agricultural Science .
According to the group , has the property of adhering to gather the finer particles of radioactive material , if Furuiwakere particulates from such soil can be recovered with microparticles the majority of radioactive material . So , ( micro parts per million) building a system that separates the only fine particles of 2-5 micrometers by, for example, soak the soil containing fine bubbles in the " nano bubble water" , easily adsorbed most radioactive cesium . By summarized in medicine, the particles of radioactive cesium is deposited , was successful in greatly reducing the amount of polluted soil .
Place in August this year , cesium concentration was experimenting with soil of about 13,000 becquerels per kilogram up to farmland in Fukushima Prefecture Minamisoma , 20% to reduce the amount of soil that need to be stored as contaminated waste , the remaining soil could be decontaminated until about 1000 becquerels per kilogram of about 92 percent. Cost of installation of the device at 300 million from 50 million to 400 million yen per unit , and being able to handle the contaminated waste of about 10 tons per hour .
It will not be changed in that I feel like a little high cost of initial investment , but also can be processed .



京都大や土壌改良ベンチャー「アース」などのグループは１３日、東京電力福島第１原発事故の除染作業で出る田畑の表土や汚泥、焼却灰などから、放射性物質が吸着している細かい粒子だけを分離・回収し、大幅に減量させる技術を開発したと発表した。京都大大学院農学研究科の豊原准教授（海洋生物機能学）は「この技術を使えば保管が必要な廃棄物の量を大幅に減らせる可能性がある」としている。
　グループによると、放射性物質はより細かい粒子に集まって付着する性質があり、土などから微粒子をふるい分ければ、放射性物質の大半を微粒子と一緒に回収できる。そこで、微細な気泡を含む「ナノバブル水」に土を浸すなどして、放射性セシウムが最も吸着しやすい２〜５マイクロメートル（マイクロは１００万分の１）の微細な粒子だけを分離するシステムを構築。放射性セシウムが付着した微粒子を薬剤でまとめることで、汚染土の量を大幅に減少させることに成功した。
　福島県南相馬市の農地で今年８月、セシウム濃度が１キロ当たり最大約１万３０００ベクレルの土で実験したところ、汚染廃棄物として保管が必要な土の量を２割まで減少させ、残りの土は約９２％減の１キロ当たり約１０００ベクレルまで除染できた。装置の設置費は１基当たり３億５０００万〜４億円で、１時間当たり約１０トンの汚染廃棄物を処理できるという。
　初期投資の費用がちょっと高いような気もしますが処理できることには変えられないでしょうね。