Muhammad Faisal, Siti Kana, Nabila, Hisbullah, Abrar Muslim, Asri Gani
This study aims to evaluate the utilization of residual charcoal from the pyrolysis of oil palm shells as activated carbon for the adsorption of cadmium metal ions in a semi-continuous process. The charcoal was crushed with a ball mill to a size of 80-100 mesh and its activation was carried out chemically using 0.1 N NaOH. Cadmium metal ions were adsorbed in a semi-continuous operation using a cylindrical packed bed column, with variations in the inlet feed concentration, pH, column inside diameter, bed height, and flow rate. The initial concentration of cadmium before and after the adsorption was tested on an atomic absorption spectrophotometer. The adsorption isotherms were evaluated using the Langmuir, Freundlich, and Dubinin-Radushkevich adsorption isotherm models. The results showed that the best adsorption capacity was obtained at an initial concentration of 120 mg/L, pH 5, inside diameter of 26 mm, bed height of 50 cm, and flow rate of 10 ml/min. The isotherm model of cadmium metal ion adsorption followed the Langmuir isotherm with R2 = 0.99. © 2022, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
Chemical Engineering Department, Faculty of Engineering, Universitas Syiah Kuala Darussalam, Banda Aceh, 23111, Indonesia; Center for Sustainable Agricultural and Rural Development, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Halal Research Center, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Oil Palm and Coconut Research Center, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Research Center for Environmental and Natural Resources, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia
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