Synthesis of a macroporous silica-based derivative of pyridine material and its application in separation of palladium
Synthesis of a macroporous silica-based derivative of pyridine material and its application in separation of palladium
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DOI：
10.1002/aic.12214
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发表时间：
2010-12
期刊：
影响因子：
3.7
通讯作者：
A. Zhang;Xiaoyu Wang;Z. Chai
中科院分区：
文献类型：
--
作者：
A. Zhang;Xiaoyu Wang;Z. Chai
将2，6-双（5，6-三嗪-1，2，4-三嗪-3-基）吡啶（BDBTP）和正辛醇浸渍并固定在SiO2-P颗粒的孔中，制备了一种新型大孔硅基材料BDBTP/SiO2-P。研究了高活性废液中10种典型裂变和非裂变元素在BDBTP/SiO_2-P上的吸附，考察了吸附时间和HNO_3浓度对吸附的影响。Pd（II）是一种弱的刘易斯酸和电子对受体，它与氮、弱的刘易斯碱和电子对供体形成强络合物。BDBTP/SiO2-P对Pd（II）具有良好的吸附性能和选择性。用BDBTP/SiO2-P填充柱从模拟高放废液中分离Pd（II）。Pd（II）用0.2M硫脲有效地洗脱并与其它组分分离。结果表明，在硝酸介质中，大孔BDBTP/SiO2-P材料在高放废液中Pd（II）的分离回收中具有良好的应用前景。© 2010美国化学工程师学会AIChE J，2010
A novel macroporous silica-based 2,6-bis(5,6-dibutyl-1,2,4-triazine-3-yl)pyridine (BDBTP) material, BDBTP/SiO2-P, was prepared through impregnation and immobilization of BDBTP and octanol into the pores of the SiO2-P particles. The adsorption of 10 typical fission and nonfission elements contained in highly active liquid waste (HLW) onto BDBTP/SiO2-P was investigated by examining the effect of contact time and the HNO3 concentration in the range of 0.1–5.0 M. Pd(II), a weak Lewis acid and an electron-pair acceptor, was strongly complexed with nitrogen, a weak Lewis base and an electron-pair donor. BDBTP/SiO2-P showed excellent adsorption ability and high selectivity for Pd(II) over all the tested metals. The separation of Pd(II) from a simulated HLW was performed by BDBTP/SiO2-P packed column. Pd(II) was effectively eluted with 0.2 M thiourea and separated from the others. It demonstrated that in HNO3, application of the macroporous silica-based BDBTP/SiO2-P material in partitioning and recovery of Pd(II) from HLW is promising. © 2010 American Institute of Chemical Engineers AIChE J, 2010