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Adsorption of Cu(II) Ions onto Myristica Fragrans Shell-based Activated Carbon: Isotherm, Kinetic and Thermodynamic Studies

대한화학회지 2018년 62권 2호 p.79 ~ 86
 ( Syahiddin D. S. ) - Syiah Kuala University Faculty of Engineering Department of Chemical Engineering

 ( Muslim A. ) - Syiah Kuala University Faculty of Engineering Department of Chemical Engineering

Abstract


This study reported the adsorption of Cu(II) ions onto activated carbon prepared from Myristica Fragrans shell (MFS AC) over independent variables of contact time, activating chemical (NaOH) concentration, initial adsorbate concentration, initial pH of adsorbate solution and adsorption temperature. The MFS AC structure, morphology and total surface area were characterized by FTIR, SEM and BET techniques, respectively. The Cu(II) ions adsorption on the MFS AC (activated using 0.5 M NaOH) fitted best to Freundlich adsorption isotherm (FAI), and the FAI constant obtained was 0.845 L/g at 30 °C and pH 4.5. It followed the pseudo first order of adsorption kinetic (PFOAK) model, and the PFOAK based adsorption capacity was 107.65 mg/g. Thermodynamic study confirmed the Cu(II) ions adsorption should be exothermic and non-spontaneous process, physical adsorption should be taken place. The total surface area and pore volume based on BET analysis was 99.85 m2/g and 0.086 cc/g, respectively.

키워드

Activated carbon; Myristica fragrans shell; Isotherm; Kinetic; Thermodynamic
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