Impregnation synthesis of a novel macroporous silica-based crown ether polymeric material modified by 1-dodecanol and its adsorption for strontium and some coexistent metals
Impregnation synthesis of a novel macroporous silica-based crown ether polymeric material modified by 1-dodecanol and its adsorption for strontium and some coexistent metals
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1-十二醇改性新型大孔二氧化硅基冠醚高分子材料的浸渍合成及其对锶和部分共存金属的吸附
DOI：
10.1016/j.seppur.2008.02.016
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发表时间：
2008-09
影响因子：
8.6
通讯作者：
Kuraoka, Etsushu
中科院分区：
文献类型：
--
作者：
Chen, Chunmei;Kumagai, Mikio;Zhang, Anyun;Kuraoka, Etsushu
4，4 ′，（5′）-二-（叔丁基环己基）-18-冠-6（DtBuCH_（18）C_6）是一种对Sr（II）具有高选择性的螯合剂。为了通过分子修饰显著降低DtBuCH 18 C6的泄漏，合成了一种大孔硅基聚合物复合材料（DtDo/SiO2-P）。它是通过浸渍和固定DtBuCH 18 C6和1-十二烷醇分子到SiO2-P粒子的孔利用先进的真空抽吸技术进行。研究了几种裂变和非裂变产物Sr（II）、Ba（II）、Cs（I）、Ru（III）、Mo（VI）、Na（I）、K（I）、Pd（II）、La（III）和Y（III）在DtDo/SiO2-P上的吸附。在298 K下考察了接触时间和HNO_3浓度在0.1-5.0M范围内的影响。在2.0M HNO_3的最佳浓度下，DtDo/SiO_2-P对Sr（Ⅱ）表现出很强的吸附能力和很高的选择性，而对Ba（Ⅱ）的吸附能力很弱或几乎没有。在2.0M HNO_3中，DtDo/SiO_2-P的总有机碳（TOC）泄漏量为187.5ppm，低于未改性的DtBuCH_（18）C_6/SiO_2-P的658.4ppm。这归因于DtBuCH 18 C6和1-十二烷醇通过分子间相互作用的有效缔合。通过用1-十二烷醇进行分子改性，实现了DtBuCH 18 C6泄漏的减少。DtDo/SiO2-P在MAREC（Minor Actinides Recovery from HLLW by Extraction Chromatography）工艺中对核乏燃料后处理高放废液中主要发热体之一Sr（II）的色谱分离中具有重要的应用价值。
4,4′,(5′)-Di-(tert-butylcyclohexano)-18-crown-6(DtBuCH18C6) is a chelating agent having high selectivity mostly for Sr(II). To significantly reduce its leakage by molecular modification, a macroporous silica-based DtBuCH18C6 polymeric composite (DtDo/SiO2–P) was synthesized. It was performed by impregnating and immobilizing DtBuCH18C6 and 1-dodecanol molecules into the pores of the SiO2–P particles utilizing an advanced vacuum sucking technique. The adsorption of a few fission and non-fission products Sr(II), Ba(II), Cs(I), Ru(III), Mo(VI), Na(I), K(I), Pd(II), La(III), and Y(III) onto DtDo/SiO2–P was investigated. It was done by examining the effects of contact time and the HNO3concentration in a range of 0.1–5.0M at 298K. At the optimum concentration of 2.0M HNO3, DtDo/SiO2–P exhibited strong adsorption ability and high selectivity for Sr(II) great over all of the tested elements, which showed very weak or almost no adsorption except Ba(II). Meanwhile, It was found that the quantity of total organic carbon (TOC) leaked from DtDo/SiO2–P in 2.0M HNO3, 187.5ppm, was lower than 658.4ppm that leaked from DtBuCH18C6/SiO2–P, which was not modified. This was ascribed to the effective association of DtBuCH18C6 and 1-dodecanol through intermolecular interaction. The reduction of DtBuCH18C6 leakage by molecular modification with 1-dodecanol was achieved. It was of great benefit to application of DtDo/SiO2–P in chromatographic partitioning of Sr(II), one of the main heat generators, from high level liquid waste (HLLW) in reprocessing of nuclear spent fuel in the MAREC (Minor Actinides Recovery from HLLW by Extraction Chromatography) process developed recently.
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影响因子：
2.9
作者：
A. Zhang;Yuezhou Wei;H. Hoshi;M. Kumagai;M. Kamiya;T. Koyama
通讯作者：
A. Zhang;Yuezhou Wei;H. Hoshi;M. Kumagai;M. Kamiya;T. Koyama
影响因子：
4.2
作者：
A. Zhang;Chengliang Xiao;E. Kuraoka;M. Kumagai
通讯作者：
A. Zhang;Chengliang Xiao;E. Kuraoka;M. Kumagai
影响因子：
2
作者：
Renato Chiarizla;E. P. Horwltz
通讯作者：
Renato Chiarizla;E. P. Horwltz
影响因子：
13.6
作者：
A. Zhang;Chengliang Xiao;E. Kuraoka;M. Kumagai
通讯作者：
A. Zhang;Chengliang Xiao;E. Kuraoka;M. Kumagai
影响因子：
1.5
作者：
Wei, Y;Kumagai, M;Odoj, R
通讯作者：
Odoj, R