Extraction of Copper (II) from aqueous solutions by using of 2-[ (4-Bromo phenyl) azo]-4,5-diphenyl imidazole

Abstract

The extraction of Copper has been studied as a complex by means of 2-[ (4-Bromo phenyl)
azo]-4,5-diphenyl imidazole dissolved in chloroform .The study revealed that the optimum
pH value was (pHext. = 9 ), concentrations of Cu(II) ion in aqueous solution giving highest
distribution ratio (D) were (40μg) and the ligand [1x10-4M] respectively and the
optimum shaking time to reach the equilibria was ten minutes . Studies organic solvent
showed there is not any linear relation between dielectric constant of organic solvents and
distribution ratio (D) of extraction ,but there is an effect for the structure of organic solvent .
The thermodynamic study demonstrates the complexation reaction is an exothermic at
temperature degrees ( 20 C 0 - 70 C0 ).
Key words:The extraction of Copper has been studied as a complex by means of 2-[ (4-Bromo phenyl)
azo]-4,5-diphenyl imidazole dissolved in chloroform .The study revealed that the optimum
pH value was (pHext. = 9 ), concentrations of Cu(II) ion in aqueous solution giving highest
distribution ratio (D) were (40μg) and the ligand [1x10-4M] respectively and the
optimum shaking time to reach the equilibria was ten minutes . Studies organic solvent
showed there is not any linear relation between dielectric constant of organic solvents and
distribution ratio (D) of extraction ,but there is an effect for the structure of organic solvent .
The thermodynamic study demonstrates the complexation reaction is an exothermic at
temperature degrees ( 20 C 0 - 70 C0 ).