...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Development of the chromatographic partitioning of cesium and strontium utilizing two macroporous silica-based calix[4]arene-crown and amide impregnated polymeric composites: PREC partitioning process
【24h】

Development of the chromatographic partitioning of cesium and strontium utilizing two macroporous silica-based calix[4]arene-crown and amide impregnated polymeric composites: PREC partitioning process

机译：利用两种大孔二氧化硅基杯[4]芳烃冠和酰胺浸渍的聚合物复合材料开发铯和锶的色谱分配方法：PREC分配工艺

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To partition effectively Cs(I) and Sr(II), two harmful heat emitting nuclides, from a highly active liquid waste by extraction chromatography, two kinds of macroporous silica-based polymeric materials, Calix[4]arene-R14/SiO2-P and TODGA/SiO2-P, were synthesized. Two chelating agents, 1,3-[(2.4-diethyl-heptylethoxy)oxyl-2,4-crown-6-calix[4]arene (Calix[4]arene-R14), an excellent supramolecular compound having molecular recognition ability for Cs(I), and N, N, N',N'-tetraoctyl-3-oxapentane-1,5-diamide (TODGA) were impregnated and immobilized into the pores of SiO2-P particles support by a vacuum sucking technique. The loading and elution of I I typical simulated fission and non-fission products from 4.0M or 2.0M HNO3 were performed at 298K. It was found that in the first column packed with the Calix[4]arene-R14/SiO2-P, all of the simulated elements were separated effectively into two groups: (1) Na(I), K(I), Sr(II), Fe(Ill), Ba(II), Ru(III), Pd(II), Zr(IV), and Mo(VI) (noted as Sr-group) (2) Cs(I)-Rb(I) (Cs-group) by eluting with 4.0M HNO3 and distilled water, respectively. The harmful element Cs(I) flowed into the second group along with Rb(l) because of their close sorption and elution properties towards Calix[4]arene-R14/SiO2-P while Sr(II) showed no sorption and flowed into Sr-containing group. In the second column packed with TODGA/SiO2-P, the Sr-group was separated into (1) Ba(11), Ru(III), Na(I), K(I), Fe(III), and Mo(VI) (non-sorption group); (2) Sr(II); (3) Pd(II); and (4) Zr(IV) by eluting with 2.0M HNO3, 0-01 M HNO3, 0.05 M DTPA-pH 2.5, and 0.5 M H2C2O4, respectively. Sr(II) adsorbed towards TODGA/SiO2-P flowed into the second group and showed the excellent separation efficiency from others. Based on the elution behavior of the tested elements, an advanced PREC (Partitioning and Recovery of two heat generators from an acidic HLW (high activity liquid waste) by Extraction Chromatography) process was proposed. (c) 2007 Elsevier B.V. All rights reserved.
机译：为了通过萃取色谱法有效分离高活性废液中的两种有害的散热核素Cs（I）和Sr（II），两种大孔二氧化硅基高分子材料Calix [4] arene-R14 / SiO2-P合成了TODGA / SiO2-P。两种螯合剂1,3-[（2.4-二乙基庚基乙氧基）氧基-1,2,4-冠-6-杯[4]芳烃（Calix [4]芳烃-R14）是一种出色的具有分子识别能力的超分子化合物将Cs（I）和N，N，N'，N'-四辛基-3-氧杂戊烷-1,5-二酰胺（TODGA）浸渍并通过真空抽吸技术固定在SiO2-P颗粒载体的孔中。在298K下从4.0M或2.0M HNO3加载和洗脱了典型的模拟裂变和非裂变产物。结果发现，在装有Calix [4] arene-R14 / SiO2-P的第一列中，所有模拟元素均有效地分为两组：（1）Na（I），K（I），Sr（ II），Fe（III），Ba（II），Ru（III），Pd（II），Zr（IV）和Mo（VI）（记为Sr-基）（2）Cs（I）-Rb（ I）（Cs-基团）分别用4.0M HNO3和蒸馏水洗脱。有害元素Cs（I）与Rb（l）一起流入第二组，因为它们对Calix [4] arene-R14 / SiO2-P的紧密吸附和洗脱特性，而Sr（II）没有吸附而流入Sr含基团。在第二根装有TODGA / SiO2-P的色谱柱中，Sr-基团分为（1）Ba（11），Ru（III），Na（I），K（I），Fe（III）和Mo（ VI）（非吸附基团）; （2）Sr（II）; （3）钯（II）; （4）Zr（IV）分别用2.0M HNO3、0-01 M HNO3、0.05 M DTPA-pH 2.5和0.5 M H2C2O4洗脱。吸附到TODGA / SiO2-P上的Sr（II）流入第二组，并显示出优异的分离效率。根据被测元素的洗脱行为，提出了一种先进的PREC（通过萃取色谱法从酸性HLW（高活性废液）中分离和回收两个热发生器）的方法。 （c）2007 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号