Reduction of lead (II) from aqueous solution by biosorbent derivated from lengkeng (euphoria logan lour) shell with batch method

Abstract

Adsorbent preparied from lengkeng shell was successfully use to reduce lead from aqueous solution in a batch method. Batch experiments were performed as a function of various experimental parameters. They were pH solution, Pb (II) ion contact time, and initial concentration. The research reveal that the optimum pH was at pH 5, with the adsorption capacity was 27,438 mg/g. The optimum concentration was 400 mg / L with the adsorption capasity was 30,543 mg/g, and the optimum contact time was 75 minutes with adsorption capacity was 34,740 mg/g. The equilibrium data were analyzed by the Langmuir and Freundlich Isotherms and obtained a maximum adsorption capacity of 58.82 mg / g. Based on the results of the experiment showing that lengkeng shells can be used as an alternative and low-cost biosorbent for the reduction of lead (II) ions from aqueous solutions, when conditions are appropriate.