Abstract
The competitive metal ion extraction of Ag(I), Cu(II), Ni(II), Zn(II), Mn(II), Cd(II) and Co(II) cations were examined and compared each with other. The experiments were buffered (acetic acid/sodium acetate and formic acid/sodiumformate) at pH 4–6. The extraction of Cu(II) and Ag(I) and Co(II) with Dibenzo 18 crown 6 (DB18C6) ligand is possible, but the extraction efficiency for Ag(I) is much better than Cu(II) and Co(II) ion. The concentrations in the all experiments for the cations and ligand were 0.01M and 1.0×10−3M respectively. Organic phase employed chloroform, dichloromethane and 1,2dichloroethane in individual experiments. The effect of picric acid in aqueous phase to the efficiency of extraction was investigated. The effect of extraction time, rate of shaking, concentration of ligand and presence of picric acid were investigated and optimized.
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