SPEC: A New Process for Strontium and Cesium Partitioning Utilizing Two Macroporous Silica-Based Supramolecular Recognition Agents Impregnated Polymeric Composites
SPEC: A New Process for Strontium and Cesium Partitioning Utilizing Two Macroporous Silica-Based Supramolecular Recognition Agents Impregnated Polymeric Composites
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DOI：
10.1080/01496390902885239
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发表时间：
2009-06
影响因子：
2.8
通讯作者：
A. Zhang;Qihui Hu;Z. Chai
中科院分区：
文献类型：
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作者：
A. Zhang;Qihui Hu;Z. Chai
摘要为了从高活性废液中有效分离两种发热体Cs（I）和Sr（II），制备了两种大孔硅基聚合物复合材料（杯[4]芳烃-R14 + M）/SiO2-P和（DtBuCH 18 C6 + M）/SiO2-P。通过将超分子识别剂1，3-[（2，4-二乙基庚基乙氧基）氧基]-2，4-冠-6-杯[4]芳烃（Calix[4]arene-R14）或4，4 ′，（5′）-二-（叔丁基环己烷）-18-冠-6（DtBuCH 18 C6）浸渍并固定到平均直径为50 µm的大孔SiO2-P颗粒的孔中来完成。发现在第一个填充有（杯[4]芳烃-R14 + M）/SiO2-P，所有测试元素被有效洗脱并分离成两组：（1）Na（I）、K（I）、Sr（II）、Ba（II）、Rh（III）、Ru（III）、Pd（II）、Zr（IV）、RE（III）（La-Lu和Y）和Mo（VI）（含Sr基团），和（2）Cs（I）-Rb（I）（Cs基团）。发热元素Cs（I）与Rb（I）一起沿着流入第二组，而Sr（II）没有显示吸附并流入含Sr组。在填充有（DtBuCH 18 C6 + M）/SiO2-P的第二柱中，通过分别用2.0 M HNO 3和水洗脱，含Sr基团被分离成（1）Na（I）、K（I）、Rh（III）、Ru（III）、RE（III）（La-Lu和Y）、Pd（II）、Zr（IV）和Mo（VI）（非吸附基团）和（2）Sr（II）-Ba（II）（Sr基团）。被（DtBuCH 18 C6 + M）/SiO2-P吸附的发热元素Sr（II）与Ba（II）一起沿着流入第二组。在此基础上，开发了一种利用两种大孔硅基超分子识别复合材料从模拟高活性废液中分离锶/铯的新工艺SPEC（Strontium/Cesium Partitioning from HLW by Extraction Chromatography）。
Abstract To effectively separate two heat generators Cs(I) and Sr(II) from a highly active liquid waste (HLW), two macroporous silica-based polymeric composites (Calix[4]arene-R14 + M)/SiO2-P and (DtBuCH18C6 + M)/SiO2-P were synthesized. It was done by impregnating and immobilizing the supramolecular recognition agent, 1,3-[(2,4-diethylheptyl ethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) or 4,4′,(5′)-di-(tert-butylcyclo hexano)-18-crown-6 (DtBuCH18C6), into the pores of the macroporous SiO2-P particles with a mean diameter of 50 µm. It was found that in the first column packed with (Calix[4]arene-R14 + M)/SiO2-P, all of the tested elements were effectively eluted and separated into two groups: (1) Na(I), K(I), Sr(II), Ba(II), Rh(III), Ru(III), Pd(II), Zr(IV), RE(III) (La-Lu and Y), and Mo(VI) (Sr-containing group), and (2) Cs(I)-Rb(I) (Cs-group) by eluting with 4.0 M HNO3 and water, respectively, at 298 K. The heat emitting element Cs(I) flowed into the second group along with Rb(I), while Sr(II) showed no sorption and flowed into the Sr-containing group. In the second column packed with (DtBuCH18C6 + M)/SiO2-P, the Sr-containing group was separated into (1) Na(I), K(I), Rh(III), Ru(III), RE(III) (La-Lu and Y), Pd(II), Zr(IV), and Mo(VI) (non-sorption group), and (2) Sr(II)-Ba(II) (Sr-group), by eluting with 2.0 M HNO3 and water, respectively. The heat emitting element Sr(II) adsorbed by (DtBuCH18C6 + M)/SiO2-P flowed into the second group along with Ba(II). Based on the results, a new process entitled SPEC (Strontium/Cesium Partitioning from HLW by Extraction Chromatography) for heat generator partitioning from a simulated highly active liquid waste utilizing two macroporous silica-based supramolecular recognition composites has been developed.