STUDY ON ADSORPTION OF Cd2+ IONS FROM AQUEOUS SOLUTIONS ONTO PINUS KESIYA DA LAT

Abstract

   This paper presents the results obtained from using pinus kesiya leaves to remove Cd2+ from aqueous solutions. The influence of different sorption parameters such as the solution pH, contact time, and initial concentration of Cd2+ was studied to evaluate adsorptive optimum conditions. The maximum adsorption took place at pH 6.0 and the contact time for the equilibrium was 120 minutes at adsorbent dose of 0.5 g. Langmuir and Freundlich isotherm models were used to explain the phenomenon. The maximum adsorption capacity of P. kesiya was 11.10 mg/g. Pseudo first-order and Pseudo secondorder kinetic models were examined to determine the adsorption mechanism, and it was found that the process followed the Pseudo second-order kinetics. The study concluded that P. kesiya could be a good candidate as adsorbent for removing Cd2+ from aqueous solutions.