Kinetic and computational evaluation of activated carbon produced from rubber tires toward the adsorption of nickel in aqueous solutions

AbstractThis work aims to evaluate the potential of waste rubber tire as an inexpensive sorbent material for nickel ion removal from aqueous solution. A laboratory scale study carried out on the production of activated carbon (AC) from waste rubber tire by physical activation method. Scanning electron microscope analysis was used to characterize the surface properties of the AC adsorbent. The surface area of AC was measured to be 465 m2/g. This large surface area of the AC could play a vital role in enhancing the removal of Ni(II). Aqueous solutions containing nickel ion in varying concentrations were prepared. Batch adsorption experiments at different operating parameters such as pH, metal concentration, adsorbent dose, contact time and temperature were carried out. These in turn revealed the adsorption capacity and helped in determining the mechanism with respect to thermodynamics, equilibrium and kinetics. The kinetic studies were carried out to determine the kinetics of the adsorption process. The Lan...

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