Abstract
The adsorptive removal of copper(II) ions from aqueous solutions were studied using the prepared polyaniline/montmorillonite composite adsorbent. The controlling parameters as: pH, adsorbent dose, ion concentration and temperature were studied. The removal of Cu(II) reached its maximum value at pH 5.5 and the equilibrium adsorption capacity was found to be 99.61 mg g-1 on the composite adsorbent. The experimental adsorption results were found to follow Langmuir adsorption isotherm model with maximum adsorption capacity of 100.01 mg g-1. The kinetic studies showed good fit of the experimental results with pseudo-second-order kinetic model, indicating the participation chemisorptions.