Study of the extraction liquid-liquid of copper (II) inthe aqueous media: Sulphate and nitratewith Di-2-ethyl hexylphosphoric acid

The solvent extraction of copper(ii) from sulphate and nitrate media by di-2-ethylhexyl phosphoric acid (d2ehpa) in chloroform was studied. the effect of ph,d2ehpa concentration and ionic strength on the extraction processes has been investigated. the ionic strength effect of the aqueous phase shows that the extraction of copper(ii) increases with decreasing concentration of sulphate.however in the nitrate medium,the extraction of copper(ii) is independent of the ionic strength. at initially 10-4 m in the aqueous phase,copper(ii) is extracted as the complex cul2.2hl. the debye-hückel extended limiting law of ionic activity coefficient has been introduced in order to gain information about the copper-sulphate interaction.