BEHAVIOUR STUDY OF SOME BIDENTATE O-HYDROXY SCHIFF BASE EXTRACTANTS IN THE REMOVAL OF COPPER (II) BY SOLVENT EXTRACTION TECHNIQUE

This work was focused on the study of the behaviour of four synthesized bidentate O-Hydroxy Schiff base extractants in the removal of copper(II) using solvent extraction technique. The extraction experiments of copper(II) with O-Hydroxy Schiff bases were carried out at room temperature and from moderately sulphate aqueous solutions. The influences of the parameter functions, such as pH, concentration of the extractant and diluent were investigated to shed light on their chemical extracting properties upon the extractability of copper(II).The extraction results revealed that the nature of diluent had a great effect onextraction efficiency and that the extraction process was observed in the pH range [3.9 -6.4]. The probable stoichiometry of the extracted species formed was found to be ML2(HL)orgH2O or ML2org (H2O)2,depending on the structure of the extractant used. Based on these results, it was concluded that the four Schiff bases can effectively be used in solvent extraction-removal of copper(II) by controlling their structure.