Study of Equilibrium, Kinetic and Thermodynamic for Removal of Pb(II) in Aqueous Solution Using Sago Bark (Metroxylon sago)

This research investigated the ability of Sago Bark (Metroxylon sago) to remove Pb(II) in aqueous solution using the batch method. The adsorption of Pb(II) with Sago Bark (Metroxylon Sago) reached the peak at pH 5, contact time 60 minutes, initial concentration 600 mg/L, agitation rate 100 rpm, adsorbent dose 0.1 g and adsorption capacity 31.4375 mg/g. The equilibrium of adsorption revealed that Langmuir isotherm model was fitted better to describe the adsorption of Pb(II) onto Sago Bark (Metroxylon sago) indicated by R-2 values at 0.8908 and 0.918 for Freundlich and Langmuir, respectively. Pseudo-second order yielded a good correlation (R-2 = 0.9979) of the experimental data. While the thermodynamic study showed a spontaneous with an endothermic process. SEM micrograph and FTIR spectrum indicated that porous surface covered by Pb(II) and the wavelength number shifting of hydroxyl and carbonyl groups from 3421.10 cm(-1) to 3423.54 cm(-1) and from 1734.16 cm(-1) to 1718.65 cm(-1) supported the adsorption of Pb(II) onto Sago Bark (Metroxylon sago).