Practical application of radionuclide decontamination technology from polluted soil in Fukushima

2017 Fiscal Year Final Research Report

• Project/Area Number: 26248045
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Green/Environmental chemistry
• Research Institution: Ehime University
• Principal Investigator: Aono Hiromichi 愛媛大学, 理工学研究科(工学系), 教授 (00184052)
• Co-Investigator(Kenkyū-buntansha): 板垣 吉晃 愛媛大学, 理工学研究科(工学系), 准教授 (30325146) ; 松枝 直人 愛媛大学, 農学研究科, 教授 (90199753)
• Project Period (FY): 2014-06-27 – 2018-03-31
• Keywords: ゼオライト / 放射性核種 / セシウム除染 / 磁化ゼオライト / 磁石選別機 / 除染シート / モルデナイト

Outline of Final Research Achievements

We studied for the purpose of decontamination of radionuclides (Cs) in soil and liquid. The radionuclide of the soil is adsorbed to the developed zeolite-magnetite composite material and recovered by the magnetic separator. The practical application is difficult, because the decontamination rate from the soil to the zeolite has decreased considerably year by year and the high cost of the magnetic separator can not be improved. For sheeting of zeolite, a nonwoven fabric zeolite sheet was prototyped and tried to decontaminate in rice fields in Fukushima. However, the practical application was difficult, because a sufficient decontamination rate was not obtained. Good results was obtained for glass solidification after decontamination. Furthermore, the addition of sodium carbonate was very effective in reducing the firing temperature and suppressing the vaporization of cesium.

Free Research Field

無機材料工学