Study on selective separation of cesium from high level liquid waste using a macroporous silica-based supramolecular recognition absorbent
Study on selective separation of cesium from high level liquid waste using a macroporous silica-based supramolecular recognition absorbent
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DOI：
10.1007/s10967-012-1738-6
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发表时间：
2012-03
影响因子：
1.6
通讯作者：
Yan Wu;Seongyun Kim;D. Tozawa;T. Ito;T. Tada;K. Hitomi;E. Kuraoka;Hiromichi Yamazaki;Keizo Ishii
中科院分区：
文献类型：
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作者：
Yan Wu;Seongyun Kim;D. Tozawa;T. Ito;T. Tada;K. Hitomi;E. Kuraoka;Hiromichi Yamazaki;Keizo Ishii
将1,3-[（2,4-二乙基庚乙氧基）氧]-2,4-冠-6-杯[4]芳烃（Calix[4]芳烃- r14）及其分子修饰剂1-十二醇连续浸渍固定在二氧化硅基聚合物载体上，制备了大孔超分子识别吸附剂（Calix[4] +十二醇）/ SiO2-P。采用热重法、差热分析和电子探针显微分析对（Calix[4] +十二醇）/ SiO2-P进行表征。在3mhno3存在下，Cs与其它金属离子（αCs/Mn+）在60以上的分离系数较大。Cs(I)的吸附数据符合Langmuir等温线，最大吸附量为0.19 mmol g−1。3 M hno3中的Cs(I)在(Calix[4] + Dodecanol)/ SiO2-P上也被有效吸附，装载的Cs(I)被H2O洗脱成功。以（Calix[4] +十二醇）/ SiO2-P填充的色谱柱经过三次循环后具有良好的重复使用性。
A macroporous silica-based supramolecular recognition absorbent (Calix[4] + Dodecanol)/SiO2–P, was prepared by successive impregnation and fixing the 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-Calix[4]arene (Calix[4]arene-R14) and its molecule modifier 1-Dodecanol onto SiO2silica-based polymer support. The characterization of (Calix[4] + Dodecanol)/SiO2–P was examined by thermal gravimetry and differential thermal analysis and electron probe microanalysis. Relatively large separation factors of Cs and other metal ions (αCs/Mn+)above 60 were obtained in the presence of 3 M HNO3. The adsorption data of Cs(I) fitted well with Langmuir isotherm and the maximum adsorption capacity was estimated to be 0.19 mmol g−1. The Cs(I) in 3 M HNO3were also effectively adsorption on (Calix[4] + Dodecanol)/SiO2–P in the column operation, and the loaded Cs(I) was successfully eluted with an eluent of H2O. The column packed with (Calix[4] + Dodecanol)/SiO2–P had excellent reusability after three cycles.