Effect of Mixed Solvent on Selective Removal of Lead (II) Ions by Dicyclohexano-18-crown-6 from Aqueous Solutions Containing Heavy Metals

摘要

The effect of the organic solvent on the transport of lead ions through a bulk liquid membrane containing dicyclohexano-18-crown-6 (DC18C6) as carrier was studied. Chloroform, 1,2-dichloroethane, chlorobenzene, nitrobenzene and their binary solutions were employed as solvents. SCN~-, NO_3~-, Cl~-and CH_3COO~- were used as anions. The selectivity and the efficiency of lead transport from aqueous solutions containing other cations such as Ni~(2+), Cu~(2+), Co~(2+), and Zn~(2+) were also investigated.