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Received September 4, 2013
Accepted January 4, 2014
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The effect of dominant ions on solvent extraction of lithium ion from aqueous solution
Department of Chemical Engineering, Pukyong National University, Busan 608-739, Korea
csju@pknu.ac.kr
Korean Journal of Chemical Engineering, May 2014, 31(5), 828-833(6), 10.1007/s11814-014-0005-7
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Abstract
Solvent extraction of lithium ion using kerosene as solvent is proposed. The extraction of lithium ion using various mixed extractants of β-diketone and neutral ligand in kerosene was performed to find the optimum extractant combination. Considering the extraction efficiency, the optimum extractant combination was 0.02 M TTA and 0.04M TOPO. For the development of lithium extraction from seawater, the effects of dominant ions in seawater were examined in various extraction conditions. The extraction efficiencies generally decreased with the concentration of dominant metallic ions and increased with pH of the aqueous solutions, but Cl- ion showed only minor effect on the efficiency, even up to its concentration in seawater. Except for Mg2+ ion, more than 70% of lithium ions could be extracted at pH 10.6 from aqueous solutions with a dominant ion at its concentration in seawater.
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Mahmoud ME, Haggag SS, Chem. Eng. J., 171(1), 181 (2011)
