Evaluation study on properties of a macroporous silica-based CMPO extraction resin to be used forminor actinides separation from high level liquid waste

查看全文 作　　者：LIU [1]Ruiqin;WEI [1,2]Yuezhou;Daisuke [2]Tozawa;XU [2]Yuanlai;Shigekazu [2]Usuda;Hiromichi [2]Yamazaki;Keizo [2]Ishii;Yuichi [3]Sano;Yoshikazu [3]Koma 机构地区：[1]School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;[2]Cyclotron and Radioisotope Center,Tohoku University,Aoba 6-3,Aramaki-Aoba-ku,Sendai,Miyagi,980-8578,Japan;[3]Japan Atomic Energy Agency (JAEA),Tokai,Ibaraki,319-1195,Japan 出　　处：《Nuclear Science and Techniques》索引2011年第22卷第1期,共7页 摘　　要：Basic properties of a silica-based octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) extraction resin (CMPO/SiO2-P) was investigated.Adsorption behavior for some rare earth elements (RE) which are constituents of high level liquid waste (HLLW) and the long-term stability of the extraction resin in nitric acid solution were examined.The CMPO extraction resin was significantly stable in 3 mol·L?1 HNO3 solution at 50oC.Furthermore,the RE(III) were efficiently separated from non-adsorptive fission product (FP) elements such as Sr(II) in a column experiment using a highly nitric acid solution.The separation behaviors of the elements are considered to result from the difference in their adsorption and elution selectivity based on the complex formation with CMPO.There was no strong dependency of RE(III) separation efficiency on feed solution flow rate.Only from the perspectives of the acid-resistant behavior of CMPO extraction resin and the elution kinetics for the metal ions with the extraction resin,the CMPO extraction resin can be used in the modified MAREC process for HLLW partitioning. 关 键 词：萃取树脂 高放废液 锕系元素 分离性能 大孔硅 提取 基础 选择性吸附