Immobilization of uranium in cristobalite ceramic through adsorption on mesoporous SBA-15 and further sintering process |
| |
| Affiliation: | 1. School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang, 621010, China;2. Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China;1. Institut für Geologische Wissenschaften, Freie Universität Berlin, Malteserstraße 74-100, 12249, Berlin, Germany;2. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489, Berlin, Germany;3. Deutsches Archäologisches Institut, Im Dol 2-6, Haus II, 14195, Berlin, Germany;1. Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang 621010, PR China;2. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China;1. State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Institute of Military and Civilian Integration, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of Life Science and Engineering, Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China;2. Archives of Scientific and Technological Research Achievements of Sichuan Province, Chengdu 610016, China;1. Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, PR China;3. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, PR China |
| |
| Abstract: | The development of an adsorbent which can be easily transformed into stable ceramic waste forms through a simple route is necessary for the treatment of the radioactive wastewater. Herein, we report on the immobilization of uranium in cristobalite ceramic through adsorption on mesoporous SBA-15 and further sintering process. The mesoporous SBA-15 with short pore length was synthesized and employed to remove uranium from aqueous solution. Subsequently, the SBA-15 with adsorbed U (U/SBA-15) was solidified by sintering. The effects of sintering temperature and U content on the structure, densification and aqueous durability of the obtained cristobalite ceramic waste forms were investigated. The results indicate that the U/SBA-15 can be transformed into stable cristobalite ceramic after sintering at 1100–1400 °C for 6 h. Furthermore, all the obtained cristobalite ceramic waste forms exhibit good aqueous durability (～10?4 g m-2 d-1). This work demonstrates a potential route and adsorbent to dispose the radioactive wastewater. |
| |
| Keywords: | Cristobalite Mesoporous SBA-15 Uranium Immobilization Adsorption |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
