Abstract
This study was aimed to determine of lead(II) metal ion adsorption ability by using adsorbents from the composite of andisol soil and fly ash. Andisol soil and fly ash were activated with NaOH 3M. The adsorbent characterization was performed by Fourier Transform Infrared Analyzer (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Surface Area Analyzer (SAA). The adsorption of lead (II) metal ion performed on solution pH of 1, 2, 3, 4, 5, and 6, variation of composition andisol soil and fly ash composite of 100:0, 25:75, 50:50, 75:25 and 0:100 (w/w), and contact time of 30, 60, 90, and 120 minutes with the batch system. Measurement of final concentration at the time of equilibrium was done using AAS. The optimum condition of lead (II) metal ion adsorption was obtained at pH of solution 5, activated andisol soil and fly ash composition 50:50 (w/w), contact time 60 minutes The result of adsorption followed Freundlich isotherm with adsorption capacity of 0,435 mg/g. The percentage of lead(II) metal ion removed is 97,11%. Keyword: andisol soil, fly ash, lead, adsorption.
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