Mixed adsorbents for Cu(II) removal from aqueous solutions

Abstract Low cost mixed adsorbents have been used to study, the removal of Cu(II) at different concentrations, and pH of the solution. The uptake of Cu (II) is maximum by wollastonite‐china clay followed by fly ash‐wollastonite and fly ash‐china clay at the same concentration, temperature and pH of the solution. Equilibrium data of various systems at 30°C and pH 6.5 fit well in the Freundlich equation. Removal of Cu(II) increases with the pH of the solution and is maximum at pH 8.0. Significant desorption of Cu(II) from the surfaces of mixed adsorbents was noted at pH 2.0.