Immobilization of Cs and Sr to HZr2(PO4)3 using an autoclave |
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| Authors: | Chihiro Hashimoto Susumu Nakayama |
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| Affiliation: | 1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, PR China;2. Key Laboratory of Advanced Structural-Functional Integration Materials, Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, PR China;1. Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;2. Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California at Davis, Davis, CA 95616, USA;3. Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, PR China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, PR China |
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| Abstract: | The proton-type crystalline zirconium phosphate, HZr2(PO4)3, was prepared by a thermal decomposition of NH4Zr2(PO4)3 at about 450 °C, where NH4Zr2(PO4)3 was obtained in advance by a hydrothermal synthesis using a mixed solution of ZrOCl2, H3PO4 and H2C2O4. Cs or Sr ion was immobilized to HZr2(PO4)3 by mixing HZr2(PO4)3 with an aqueous solution of CsNO3 or Sr(NO3)2 under the molar ratio CsNO3/HZr2(PO4)3 = 1.0 or Sr(NO3)2/HZr2(PO4)3 = 0.5. The mixtures were treated thermally in an autoclave at different temperatures from 200 to 275 °C and Arrhenius equation was applied to the Cs and Sr immobilization process to HZr2(PO4)3. The activation energy for the immobilization process of Cs or Sr was estimated as 179 kJ mol?1 and 186 kJ mol?1, respectively. |
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