Development of recovery and long-term fixation technology of radioactive cesium using a zeolite / apatite composite

2017 Fiscal Year Final Research Report

• Project/Area Number: 26820308
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: Hosei University (2017); Kanazawa Institute of Technology (2014-2016)
• Principal Investigator: WATANABE Yujiro 法政大学, 生命科学部, 准教授 (60410297)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: セシウム / ゼオライト / アパタイト / モルデナイト / 焼結 / 放電プラズマ焼結 / 複合体 / 安定化

Outline of Final Research Achievements

In this study we have developed a technology for recovery and long term stabilization of radioactive cesium using zeolite / apatite composite. The synthetic mordenite / apatite composite was prepared from calcium type synthetic mordenite by an alkaline hydrothermal treatment with ammonium phosphate solution at 80℃. The composite prepared was retained high cesium adsorption ability as synthetic mordenite. The zeolite/apatite composite with apatite matrix sintered using PECS method at 950℃ and 1050℃ and that sintered using pressureless sintering method at 1200℃ were dense sintered bodies without cracking. The cesium elution percentage of those sintered bodies were less than 1.0 % in 0.6 M NaCl. Therefore this technology can be expected as a recovery and long-term stabilization of radioactive cesium.

Free Research Field

環境材料化学