An Analytical Study of Complexation Effect of Cd(II) Ion with Polystyrene Boned Functional Group in the Presence of Third Component γ-Dinitrophenol and α- Dinitrophenol in Aqueous Solutions

الملخص

This study tackles a selective, sensitive and reliable method for preconcentration and spectrophotometric determination of trace cadmium ions in its aqueous solutions based on information of mixed-ligand complex in the (complexingabsorbent-Cd(II)ions- α- and γ-dinitrophenol) system. The effect of adding α- and γ-dinitrophenol ligands on complexation of Cd (II) with adsorbents of polystyrene-azo-phenol derivatives in aqueous solutions was investigated. The parameters including optimum acidity (pH _opt), the half-adsorption pH value (pH₅₀), time (t) and temperature (T), the adsorption capacity ) ), the stability constant of the complexation (logβ) in the presence of a ligand as a third component were extensively investigated under batch (static) conditions. The adsorption selectivity of Cd (II) and the possibility of desorption in this system were studied. The structure of the mixed ligand complex was suggested.