Adsorption Property of Cesium onto Modified Macroporous Silica–Calix[4]arene-crown Based Supramolecular Recognition Materials
Adsorption Property of Cesium onto Modified Macroporous Silica–Calix[4]arene-crown Based Supramolecular Recognition Materials
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DOI：
10.1021/ie202540d
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发表时间：
2012-04
影响因子：
4.2
通讯作者：
A. Zhang;Z. Chai
中科院分区：
文献类型：
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作者：
A. Zhang;Z. Chai
研究了298 K下Cs（I）在硝酸介质中的吸附行为。研究了U（VI）、一些典型元素和温度对Cs（I）吸附的影响。以大孔硅基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）为载体，以磷酸三丁酯（TBP）、辛醇（Oct）和甲基辛基-2-二甲基丁酰胺（MODB）为修饰剂，制备了超分子识别材料（Calix[4] + M）/SiO2-P。结果表明，（Calix[4] + M）/SiO2-P对除Rb（I）外的Cs（I）和U（VI）具有良好的吸附性能和选择性。研究了修饰后的超分子识别材料对Cs（I）的吸附性能。（杯[4] + Oct）/SiO2-P >（Calix[4] + TBP）/SiO2-P >（Calix[4] + MODB）/SiO2-P。从含有La（III）、Sr（II）、Ru（III）、Cs（I）、Rb（I）、U（VI）、Mo（VI）、Zr（IV）、Gd（III）、Pd（II）在（Calix[4] + TBP）/SiO2-P填充柱上进行。Cs（I）可被水有效洗脱。评价了（Calix[4] + M）/SiO2-P材料从高活性废液中有效分离Cs（I）的可能性和可行性。
The adsorption behavior of Cs(I), one of the heat generators, in HNO3 medium was investigated at 298 K. The impact of U(VI), some typical elements, and temperature on the adsorption of Cs(I) was evaluated. It was performed by macroporous silica-based 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) impregnated supramolecular recognition materials (Calix[4] + M)/SiO2-P. They were modified with tri-n-butyl phosphate (TBP), octanol (Oct), and methyloctyl-2-dimethylbutanemide (MODB). The excellent adsorption ability and high selectivity of (Calix[4] + M)/SiO2-P for Cs(I) except Rb(I) and U(VI) were confirmed. The adsorption ability of Cs(I) onto the modified supramolecular recognition materials was (Calix[4] + Oct)/SiO2-P > (Calix[4] + TBP)/SiO2-P > (Calix[4] + MODB)/SiO2-P. The chromatographic separation of Cs(I) from a 4.0 M HNO3 solution containing La(III), Sr(II), Ru(III), Cs(I), Rb(I), U(VI), Mo(VI), Zr(IV), Gd(III), and Pd(II) was carried out with a (Calix[4] + TBP)/SiO2-P packed column. Cs(I) was eluted effectively with water. The possibility and feasibility of effective partitioning of Cs(I) from highly active liquid waste by the (Calix[4] + M)/SiO2-P materials was evaluated.