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Zaira Zaman Chowdhury,Sharifuddin Mohd. Zain,Rashid Atta Khan,Md. Sakinul Islam 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.9
The potential of activated carbon prepared from kenaf fiber (KF) to remove copper (II) from aqueous effluents was investigated. The fibers were first semi-carbonized, then impregnated with potassium hydroxide (KOH) and finally activated by using carbon dioxide (CO2) gas to produce activated carbon. Pore structure and physical characteristics of the prepared kenaf fiber activated carbon (KFAC) were determined. Adsorption studies for divalent copper (Cu)ions were carried out to delineate the effect of contact time, temperature, pH and initial metal ion concentration on equilibrium adsorption capacity. The experimental data followed pseudo-second-order kinetics and Elovich Model than pseudo-first-order. Langmuir, Freundlich and Temkin models were implemented to analyze the parameters for adsorption at 30 oC, 50 oC and 70 oC. Thermodynamic parameters such as ΔGo, ΔHo and ΔSo which represent Gibbs free energy,enthalpy and entropy, respectively, were evaluated. It was concluded that activated carbon from kenaf fiber (KFAC)can be used as an efficient adsorbent for removal of Cu (II) from synthetic wastewater.