Separation of strontium ions from a simulated highly active liquid waste using a composite of silica-crown ether in a polymer.
Separation of strontium ions from a simulated highly active liquid waste using a composite of silica-crown ether in a polymer.
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DOI：
10.1002/jssc.200800358
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发表时间：
2008-10
影响因子：
3.1
通讯作者：
A. Zhang;Weihong Wang;Z. Chai;M. Kumagai
中科院分区：
文献类型：
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作者：
A. Zhang;Weihong Wang;Z. Chai;M. Kumagai
为了从高活性废液（HLW）中分离锶（II），合成了一种大孔硅基4,4',(5')-二（t-丁基环己酸）-18-冠-6 (DtBuCH18C6)-三-正丁基磷酸（TBP）聚合物复合材料(DtBuCH18C6+TBP)/SiO(2)-P。通过将DtBuCH18C6和TBP浸渍并固定化到SiO(2)-P颗粒的孔中，在孔中用TBP修饰DtBuCH18C6。在323 K时，研究了Sr（II）和模拟高沸石中含有的一些共存元素在(DtBuCH18C6+TBP)/SiO(2)-P上的吸附。结果表明，在2.0 M HNO(3)中，Sr（II）对除Ba（II）外的所有金属均表现出较强的吸附能力和较高的选择性。采用(DtBuCH18C6+TBP)/SiO(2)-P填充柱对含有5 mM被测元素的2.0 M HNO(3)进行Sr（II）的色谱分划。La（III）、Y（III）、Na(I)、K(I)、Cs(I)、Ru（III）、Mo（VI）和Pd（II）几乎不被吸附，随2.0 M HNO(3)流入出水。Sr（II）被(DtBuCH18C6+TBP)/SiO(2)-P强烈吸附，然后被水有效洗脱，而Ba（II）由于化学性质相似，随Sr（II）一起流入出水。此外，还对水相中总有机碳的出血性进行了评价。结果表明，在2.0 M HNO(3)条件下，大孔二氧化硅基dbuch18c6聚合物复合材料用于模拟高沸石中Sr（II）的色谱分划是可行的。
To partition Sr(II) from highly active liquid waste (HLW), a macroporous silica-based 4,4',(5')-di(t-butylcyclohexano)-18-crown-6 (DtBuCH18C6)-tri-n-butyl phosphate (TBP) polymeric composite, (DtBuCH18C6+TBP)/SiO(2)-P, was synthesized. It was done by impregnation and immobilization of DtBuCH18C6 and TBP into the pores of the SiO(2)-P particles, where DtBuCH18C6 was modified with TBP. The sorption of Sr(II) and some co-existent elements contained in a simulated HLW onto (DtBuCH18C6+TBP)/SiO(2)-P was investigated at 323 K. It was found that in 2.0 M HNO(3), Sr(II) exhibited strong sorption ability and high selectivity over all the tested metals except Ba(II). Chromatographic partitioning of Sr(II) from 2.0 M HNO(3) containing 5 mM of the tested elements was performed by (DtBuCH18C6+TBP)/SiO(2)-P packed column. La(III), Y(III), Na(I), K(I), Cs(I), Ru(III), Mo(VI), and Pd(II) had almost no sorption and flowed into effluent along with 2.0 M HNO(3). Sr(II) adsorbed strongly by (DtBuCH18C6+TBP)/SiO(2)-P was then eluted effectively by water, while Ba(II) flowed into effluent along with Sr(II) due to the similar chemical properties. In addition, the bleeding of total organic carbon in aqueous phase was evaluated. The results demonstrated that in 2.0 M HNO(3), application of the macroporous silica-based DtBuCH18C6 polymeric composite in chromatographic partitioning of Sr(II) from the simulated HLW is feasible.