Removal of Pb (II) Ions from Aqueous Solution using Mahogany (Swietenia macrophylla King) Sawdust as Lowcost Adsorbent

Eko Prasetyo Kuncoro, Isni Arliyani, Handoko Darmoekoesoemo


This research aimed to investigate the removal efficiency of Pb (II) ions using mahogany sawdust as an adsorbent. Several experiments were carried out to get the results. The batch adsorption method was used. The parameters studied were pH and contact time. The pH variation used was 2, 3, 4, 5, and 6. Contact time variation used was 5, 10, 15, 30, 60, 90, 120 and 150 minutes. To evaluate the isotherm model of the adsorption, the metal concentration variation used was 10, 25, 50, 100, 150, and 200 mg/L. To evaluate kinetics adsorption, pseudo-first-order and pseudo-second-order models were used. The characterization of the adsorbent was carried out by determining pHPZC, FTIR analysis, and SEM analysis. The adsorbent had a pHPZC of 5.63. FTIR spectra showed that the adsorbent had -OH functional group that could bind to Pb (II) ions. SEM analysis showed that the surface morphology of the adsorbent supported the removal of Pb (II) ions. In this work, pH 6 provided the highest removal of Pb (II) ions, while the contact time which provided the highest removal of Pb (II) ions was 30 minutes. The removal of Pb (II) ions followed the Freundlich adsorption isotherm, while the adsorption kinetics followed pseudo-second-order model.



wastewater treatment; clean water; lead; sawdust; mahogany

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