Abstract
To separate Cs(I) from highly active liquid waste, a macroporous silica-based 25, 27-bis(iso-propyloxy)calix[4]arene-26,28-crown-6 (BiPCalix[4]C6) supramolecular recognition material, BiPCalix[4]C6/SiO2–P, was synthesized and characterized by SEM, FT-IR, and TG-DSC. The adsorption properties of BiPCalix[4]C6/SiO2–P and a macroporous polymer-based supramolecular recognition composite, BiPCalix[4]C6/XAD-7, were compared. It was found that BiPCalix[4]C6/SiO2–P exhibited better adsorption ability and faster adsorption dynamics than BiPCalix[4]C6/XAD-7. The adsorption isotherm of Cs(I) onto BiPCalix[4]C6/SiO2–P was studied at 298 K and it was well described by Langmuir isotherm model. The complex composition between BiPCalix[4]C6/SiO2–P and Cs(I) was determined as 1:1 type by investigating the effect of the concentrations of BiPCalix[4]C6, Cs(I), and H+ on the adsorption. Meanwhile, the selectivity of BiPCalix[4]C6/SiO2–P towards Na(I), K(I), Rb(I), Cs(I), Sr(II), Ba(II), Ru(III), Mo(VI), La(III), and Y(III) was investigated.
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Acknowledgments
The authors acknowledge financial support for the project sponsored by the National Natural Science Foundation of China under Contract Nos. 20671081 and 91126021, the Specialized Research Fund for the Doctoral Program of Higher Education under Contract No. 20070335183, and the Zhejiang Provincial Natural Science Foundation of China under Contract Nos. Y406022 and Y4110002.
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Xiao, C., Zhang, A. & Chai, Z. Synthesis and characterization of a novel organic–inorganic hybrid supramolecular recognition material and its selective adsorption for cesium. J Radioanal Nucl Chem 299, 699–708 (2014). https://doi.org/10.1007/s10967-013-2798-y
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DOI: https://doi.org/10.1007/s10967-013-2798-y