A novel synergistic solvent impregnated resin (SIR), containing both 1-phenyl-1,3-tetradecanedione (C 11 phβDK) and tri- n -octylphosphine oxide (TOPO), was used for the selective adsorption of Li + in aqueous chloride media. The extractants have a synergistic effect on the ability of the SIR system to adsorb Li + ion with high selectivity relative to Na + and K + . The extent of adsorption of Li + is increased with an increase in the amount of TOPO impregnated in the SIR. Li + can be effectively separated from a solution containing a high concentration of Na + by column chromatography using a column packed with SIR.
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Onishi et al. (2010) studied this question.
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