Extraction of Copper (II) Ion Pair Complex from Aqueous Solutions by Using the Reagent 2-[(4-chloro -2-methoxyphenyl)azo]-4,5 Diphenylimidazole

Abstract

Extraction of Cu+2ions from aqueous solutions reagent 2-[(4-chloro -2-methoxyphenyl)azo]-4,5 diphenylimidazole (4-ClMePADPAI) shows the optimum conditions for extraction was (pHex=8) ,concentration of Cu+2ions in aqueous solution (30μg) (9.45×10-5M),as well as shaking time (10 min) ,all these conditions giving higher distribution ratio (D) ,organic solvent effect shows there is not any linear relation between distribution ratio (D) and dielectric constant (ε),for organic solvents used but there is an the effect for organic solvent structure on the extraction method .Stoichiometric study shows the more probable structure of ion pair complex extracted for Cu+2ions with reagent (4-ClMePADPAI) was1:1 (metal:reagent)[Cu(4-ClMePADPAI)]+2SO4-2. The effect of temperature on the extraction of Cu+2ions shows the reaction between Cu+2ions reagent ((4-ClMePADPAI) was exothermic