Adsorption Behavior of Sr(II) and some Typical Co‐existent Metals Contained in High Level Liquid Waste onto a Modified Macroporous Silica‐Based Polymeric DtBuCH18C6 Composite
Adsorption Behavior of Sr(II) and some Typical Co‐existent Metals Contained in High Level Liquid Waste onto a Modified Macroporous Silica‐Based Polymeric DtBuCH18C6 Composite
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高放废液中 Sr(II) 和一些典型共存金属在改性大孔二氧化硅基聚合物 DtBuCH18C6 复合材料上的吸附行为
DOI：
10.1080/07366290802301390
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发表时间：
2008
影响因子：
2
通讯作者：
Yuezhou Wei
中科院分区：
文献类型：
--
作者：
A. Zhang;Chunmei Chen;Weihong Wang;Yuezhou Wei
为了显著减少4，4 ′，（5′）-二（叔丁基环己基）-18-冠-6（DtBuCH 18 C6）的渗出，合成了一种改进的新型大孔硅基聚合物复合材料（DtBuCH 18 C6 +TBP）/SiO2-P。它是通过浸渍和固定化DtBuCH 18 C6到SiO2-P颗粒的孔隙中，通过磷酸三丁酯（TBP）通过氢键对DtBuCH 18 C6进行分子改性来进行的。在323 K下研究了几种典型的模拟裂变和非裂变产物Pd（II）、La（III）、Na（I）、K（I）、Sr（II）、Ba（II）、Ru（III）、Cs（I）、Mo（VI）和Y（III）在（DtBuCH 18 C6 +TBP）/SiO2-P上的吸附。通过检查接触时间和HNO 3浓度在0.1-5.0 M范围内的影响来完成。在2.0 HNO 3中，主要放热核素之一的Sr（II）在（DtBuCH 18 C6 +TBP）/SiO2-P上表现出最佳吸附，而除部分Ba（II）外，其他核素表现出非常弱或几乎没有吸附。评价了TBP和DtBuCH 18 C6从（DtBuCH 18 C6 +TBP）/SiO2-P中的浸出。（DtBuCH 18 C6 +TBP）/SiO2-P在2.0 M HNO 3中323 K浸出的DtBuCH 18 C6平均含量为298.7 ppm，明显低于DtBuCH 18 C6/SiO2-P在298 K浸出的797.3 ppm。实现了DtBuCH 18 C6从其大孔二氧化硅基聚合物吸附剂中浸出的显著减少。它可用于硅基DtBuCH 18 C6浸渍的聚合物复合材料在高放废液（HLLW）中Sr（II）的色谱分配中的再循环操作。
To significantly reduce the bleeding of 4,4′,(5′)‐di(tert‐butylcyclohexano)‐18‐crown‐ 6 (DtBuCH18C6), an improved novel macroporous silica‐based polymeric composite (DtBuCH18C6+TBP)/SiO2‐P was synthesized. It was performed by impregnating and immobilizing DtBuCH18C6 into the pores of the SiO2‐P particles via the molecular modification of DtBuCH18C6 with a tri‐n‐butyl phosphate (TBP) through hydrogen bonding. The adsorption of a few typical simulated fission and non‐fission products Pd(II), La(III), Na(I), K(I), Sr(II), Ba(II), Ru(III), Cs(I), Mo(VI), and Y(III) onto (DtBuCH18C6+TBP)/SiO2‐P was investigated at 323 K. It was done by examining the effect of contact time and the HNO3 concentration in a range of 0.1–5.0 M. Sr(II), one of the main heat emitting nuclides, showed optimum adsorption onto (DtBuCH18C6+TBP)/SiO2‐P in 2.0 HNO3, while others showed very weak or almost no adsorption except a portion of Ba(II). The leaching of TBP and DtBuCH18C6 from (DtBuCH18C6+TBP)/SiO2‐P was evaluated. The average content of DtBuCH18C6, 298.7 ppm, leached from (DtBuCH18C6+TBP)/SiO2‐P in 2.0 M HNO3 at 323 K was obviously lower than that of 797.3 ppm leached from DtBuCH18C6/SiO2‐P at 298 K. The significant reduction of DtBuCH18C6 leaching from its macroporous silica‐based polymeric adsorbent was achieved. It is useful for the recycle operation of the silica‐based DtBuCH18C6 impregnated polymeric composite in chromatographic partitioning of Sr(II) from high level liquid waste (HLLW).
影响因子：
1.5
作者：
Wei, Y;Kumagai, M;Odoj, R
通讯作者：
Odoj, R