Interaction models on sand surface of natural adsorbent with adsorbate Cd+2 metal ions in solution with batch operation

Abstract

The interaction type of metal ion with the adsorbent surface in adsorption operation was evaluated in this study. The binary metal ions in solution was mixed with the sand then shaken in 100 rpm. The kinetics adsorption capacity was than measured with the pseudo order model to evaluate the interaction type from the r2 indicator. The result found that the Cd ions with r2 = 0.9656 and r2 = 0.9989 for first and second order respectively, for black sand and r2 = 0.9070 and r2 = 0.999 for first and second order respectively, for white sand. It was indicated that the interaction type of metal ions on sand surface was occurred together as physical and chemical interaction.