Effective separation of cesium with a new silica-calix[4]biscrown material by extraction chromatography
Effective separation of cesium with a new silica-calix[4]biscrown material by extraction chromatography
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DOI：
10.1016/j.seppur.2016.07.011
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发表时间：
2016-10
影响因子：
8.6
通讯作者：
A. Zhang;Wenwen Zhang;Yining Wang;X. Ding
中科院分区：
文献类型：
--
作者：
A. Zhang;Wenwen Zhang;Yining Wang;X. Ding
To separate Cs(I), a new silica-calix[4]biscrown hybrid material, 1,3-calix[4]arene-bis(naph-crown-6) (CalixBNaphC)@SiO2-P, was synthesized by impregnationin situand immobilization of agent into the pores of the SiO2-P particles. The materials were characterized by SEM images, FT-IR spectra, nitrogen adsorption-desorption isotherms and29Si solid-state CP/MAS NMR. The adsorption of Cs(I) and some typical metals onto CalixBNaphC@SiO2-P was investigated by examining the effect of contact time and HNO3concentration in the range of 0.4–6.0 M. Enrichment and recovery of Cs(I) in batch experiments were performed by six adsorption and desorption cycles. The removal of Cs(I) was more than 99.1%. Based on the batch results, the chromatographic separation of Cs(I) from 3.0 M HNO3was conducted by CalixBNaphC@SiO2-P packed column. The effective separation of Cs(I) was achieved utilizing 3.0 M HNO3and water as eluents. A new process entitled PCEC (Partitioning ofCesium byExtractionChromatography) for individual separation of Cs(I) was developed.
