Korean Journal of Chemical Engineering, Vol.26, No.6, 1729-1732, November, 2009
Adsorption of zinc (II), cadmium (II), and copper (II) with PTFE Selective Resin containing primary amine N1923 and Cyanex925
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In the present study, a synergistic extraction mixture, primary amine N1923 (RNH2) and Cyanex925 (B), was loaded on PTFE powder to prepare PTFE Selective Resin and was employed for the adsorption of zinc, cadmium, and copper from chloride medium. The effects of shaking time, resin amounts, concentration of metal ions, and experimental temperature on the distribution coefficients were determined. The stoichiometry of the adsorbed complexes was
determined to be MCl2·(1/2)RNH2·B with the Selective Resin. The equilibrium constants and thermodynamic quantities (ΔH, ΔG, and ΔS) were calculated. Furthermore, the Freundlich isotherm proved to be more suitable than the Langmuir isotherm to indicate the effect of concentration of M2+ on the adsorption with PTFE Selective Resin.
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