Conclusions  Palm kernel fibre has been shown to have a fairly high capacity for the removal of copper ions from solution.  It was also revealed that.

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Conclusions  Palm kernel fibre has been shown to have a fairly high capacity for the removal of copper ions from solution.  It was also revealed that the copper ions/palm kernel fibre interaction is endothermic with an activation energy higher than 22 kJ/mol.  The adsorption equilibrium capacity, the adsorption rate constant, and the initial adsorption rate are function of the initial copper concentration, and the reaction temperature.  Both linear and non-linear method could be a way to obtain the kinetic parameters when fitting experimental data and kinetic model are in a high correlation. Kinetic Studies of Adsorption of Copper Ion from Aqueous Solution by Palm Kernel Fibre Ming-Huang Wang 1#, Pei-Yu Lin 1, Wen-Ta Chiu 2,3 and Yuh-Shan Ho 4 * 1 School of Public Health, Taipei Medical University 2 Graduate Institute of Injury Prevention and Control, Taipei Medical University 3 Department of Neurosurgery, Taipei Medical University - Wan-Fang Hospital 4 Bibliometric Centre, Taipei Medical University - Wan-Fang Hospital Introduction The removal of copper ions from water using agricultural waste products has gain popularity in recent times. Some agricultural waste products that have been successfully applied as adsorbent for copper ions from aqueous solution includes seed of Capsicum annum, carrot residues, banana pith, soybean hulls, cottonseed hulls, rice straw, sugarcane bagasse, apple wastes, groundnut shells, grape stalks, wheat shell, tea waste, sunflower stalk, and tree fern. In this study, the dynamic behavior of copper ion adsorption onto palm kernel fibre was studied with the effect of initial copper concentration and temperature. A comparison was made of the linear least-squares method and non-linear method of the widely used pseudo-second-order kinetic model to the experimental adsorption of copper onto fibre. A trial-and-error procedure was used for the non-linear method using the solver add-in with Microsoft’s spreadsheet, Microsoft Excel. Results Methods A range of reaction temperatures (299, 309, 319, 329, and 339K) were used and the flasks were agitated for 60 min. All contact investigations were performed in a 1 dm 3 flask. A 1.0 g sample of palm kernel fibre was added to 100 ml volume of copper ion solution set at pH 5.01 and agitated at 200 rpm for all the experiments. The experiments were carried out at initial copper ion concentration 250 mg/dm 3 for all the studies. Table 1. Pseudo-second-order kinetic model linear forms Table 2. Pseudo-second-order rate parameters obtained using the non- linear methods at different initial copper concentrations Table 3. Pseudo-second-order rate parameters obtained using the non-linear methods at different temperatures Figure 1. Type-1 pseudo-second-order linear equations obtained by using the linear method for the adsorption of copper onto palm kernel fibre at various initial copper concentrations Figure 2. Type-2 pseudo-second-order linear equations obtained by using the linear method for the adsorption of copper onto palm kernel fibre at various initial copper concentrations Figure 1. Type-3 pseudo-second-order linear equations obtained by using the linear method for the adsorption of copper onto palm kernel fibre at various initial copper concentrations Figure 2. Type-4 pseudo-second-order linear equations obtained by using the linear method for the adsorption of copper onto palm kernel fibre at various initial copper concentrations