Extraction equilibrium and thermodynamics of cesium with a new derivative of calix[4]biscrown |
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| Authors: | Ying Dai Anyun Zhang |
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| Institution: | 1. Director of Molecular Engineering Laboratory, Department of Chemical and Biological Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, People’s Republic of China
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| Abstract: | A new supermolecular recognition agent named tetra-tert-butyl-calix4]-bis(4-methly-1,2-phenylene-crown-6] (TertButylCalixC) was synthesized. Batchwise experiments of extraction of Na(I), K(I), Rb(I), Cs(I), Sr(II), Ba(II), Ru(III) and Fe(III) from aqueous solution with TertButylCalixC/o-nitroanisole were carried out. Effects of HNO3 concentration, contact time and temperature on the extraction behavior were examined. The equilibrium established within 30 min implied a fast extraction kinetics. The optimal operation temperature was 298 K. Stoichiometry of TertButylCalixC and Cs(I) by electrospray ionization mass spectrometry characterization revealed 1:1 molar ratio. It was observed that the extraction system of TertButylCalixC/o-nitroanisole was effective for selective removal of Cs(I), showing remarkable separation performance. |
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