Adsorption of fe+3 , cr+3 , cd+2 ions from aqueous solution on red kaolin

الملخص EN

In this study the adsorption of Fe+3, Cr+3, Cd+2 ions on Red Kaolin from an aqueous solution was studied.

The effect of various operation variable mainly adsorbate concentration, adsorbent dosage, temperature, PH and contact time of ions were evaluated.

The optimum contact time to attain equilibrium at 90min of Cr+3 ion, 60min of Fe+3 ion, and 120min of Cd+2 ion, and the maximum of adsorbent dosage was 0.1gm of Cr+3, Cd+2 and Fe+3 and the best PH values in the range (2-14), the result showed in PH optimum at pH = 6 of Cr+3, pH = 2 of Fe+3 and pH = 3 of Cd+2.

The effect of temperature and thermodynamic parameters wear also studied, the adsorption amount was increased with increased the temperature and the reaction was endothermic.

The adsorption isotherms data was analyzed using the Freundlich and Langmuir.