Preparation of a Macroporous Silica-Based Multidentate Soft-Ligand Material and its Application in the Adsorption of Palladium and the Others
Preparation of a Macroporous Silica-Based Multidentate Soft-Ligand Material and its Application in the Adsorption of Palladium and the Others
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DOI：
10.1080/01496395.2012.742108
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发表时间：
2013-01
影响因子：
2.8
通讯作者：
A. Zhang;Jialei Jiang;Z. Chai
中科院分区：
文献类型：
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作者：
A. Zhang;Jialei Jiang;Z. Chai
为了分离Pd(II)，采用真空法制备了大孔硅基软配体2，6-bis(5，6-di(iso-butyl)-1，2，4-triazine-3-yl)pyridine材料BDIBTP/SiO_2-P。它是将BDIBTP和正辛醇分子浸渍并固定到平均直径为50µm的大孔SiO_2-P颗粒中而形成的多齿络合复合材料，用正辛醇通过分子间相互作用力对BDIBTP进行改性。研究了BDIBTP/SiO_2-P材料对高活性废液(HLW)中几种典型裂变产物的吸附行为。BDIBTP/−-P对Pd(II)具有较好的吸附能力和较高的选择性。这归因于Pd(II)与BDIBTP/SiO_2-P的有效络合作用。考虑到BDIBTP对金属元素Mas(III)的络合作用，讨论了从模拟高放废液中同时有效地分配Pd(II)和Mas(III)的可能性和可行性。提出了MA(III)和Pd(II)分离的MPS新概念工艺。
To separate Pd(II), a macroporous silica-based soft-ligand 2,6-bis(5,6-di(iso-butyl)-1,2,4-triazine-3-yl)pyridine (BDIBTP) material, BDIBTP/SiO2-P, was synthesized by vacuum treatment. It was a multidentate chelating composite prepared by impregnation and immobilization of BDIBTP and 1-octanol molecules into the pores of the macroporous SiO2-P particles with a mean diameter of 50 µm. 1-Octanol was used to modify BDIBTP through intermolecular interaction force. The adsorption of some typical fission products Zr(IV), Pd(II), La(III), Y(III), Ru(III), Rh(III), and Mo(VI) contained in highly active liquid waste (HLW) onto the BDIBTP/ SiO2-P materials was investigated. It was carried out by examining the effects of contact time and the concentration of HNO3 in the range of 0.3 M−7.0 M. BDIBTP/SiO2-P showed excellent adsorption ability and high selectivity for Pd(II) over all of the tested metals. It was ascribed to the effective complexation of Pd(II) with BDIBTP/SiO2-P. Consideration of the complexation of BDIBTP for minor actinides MAs(III), the possibility and feasibility of effective partitioning of Pd(II) and MAs(III) simultaneously from a simulated HLW were discussed. A new concept process entitled MPS for the MA(III) and Pd(II) Separation has been proposed.