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Solvent extraction of Li+, H3O+ and NH4 + into nitrobenzene by using sodium dicarbollylcobaltate and calix[4]arene-bis(t-octylbenzo-18-crown-6) |
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| Authors: | E Makrlík P Selucký P Vaňura B A Moyer |
| Institution: | 1. Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Kamycká?129, 165 21, Prague 6, Czech Republic 2. Nuclear Research Institute, 250 68, ?e?, Czech Republic 3. Department of Analytical Chemistry, Institute of Chemical Technology, Prague, Technická?5, 166 28, Prague 6, Czech Republic 4. Oak Ridge National Laboratory, Chemical Sciences Division, P. O. Box 2008, Oak Ridge, TN, 37831-6119, USA |
| Abstract: | From extraction experiments and $ \gamma $ -activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + NaL+ (nb) ? ML+ (nb) + Na+ (aq) taking place in the two–phase water–nitrobenzene system (M+= Li+, H3O+, NH4 +; L = calix4]arene-bis(t-octylbenzo-18-crown-6); aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following cation order: H3O+ < Li+ < NH4 +. |
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