Abstract
This study aims to determine the adsorption capacity, study the kinetics and adsorption equilibrium of activated carbon/AC and composite carbon/AC-Cu(TAC) in the adsorption process of Fe metal. Oil palm empty fruit bunches (EFB) were used as activated carbon and modified with MOFs Cu(TAC) composite. The concentration of Fe(II) ions adsorbed during the adsorption process was analyzed using AAS. The variations used to determine the optimum conditions for absorption of Fe(II) ions are the mass variation of the adsorbent, the variation of the adsorbate concentration and the contact time between the adsorbent and the adsorbate. Through variations in concentration, the adsorption isotherm characteristics were determined and through variations in contact time, the adsorption kinetics model was determined. The results of AC characterization showed a sharp absorption in the presence of OH, CH and CO groups which indicated the presence of cellulose. AC is amorphous and AC-Cu(TAC) is crystalline and the pore size is mesoporous. The optimum condition for AC is the mass variation of 1 g with an absorption capacity of 0.1816 mg/g, a variation of the concentration of 60 ppm with an absorption capacity of 3.49 mg/g and a contact time of 75 minutes with an absorption capacity of 3.82 mg/g. The optimum condition for ACCu(TAC) was the mass variation of 1 g with an absorption capacity of 0.7275 mg/g, a variation of the concentration of 180 ppm with an absorption capacity of 10.52 mg/g and a contact time of 15 minutes with an absorption capacity of 10.85 mg/g. AC-Cu(TAC) has a better adsorption ability in adsorbing Fe(II) ions. For AC and AC-Cu(TAC) the suitable adsorption isotherm is Freundlich isotherm and the suitable adsorption kinetics model is pseudo second order
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