Adsorption of Nickel (II) ions from aqueous solution using Potassium Carbonate activated Tectona grandis leaves carbon

Abstract

Activated carbon has been prepared from Tectona grandis leaves and characterized. This carbon is ready to sorb metal ions from its aqueous solution. It has been noted that a increasing the carbon dose with constant Ni (II) ion solution concentration, or a rise in the Ni (II) ion solution concentration with constant carbon concentration resulted in a higher and lower nickel uptake per unit weight of carbon respectively. The Langmuir and Freundlich isotherm models of this adsorption system were studied and reported. The surface adsorption capability (Q0 ) calculated from Langmuir isotherm was 38.025 mg Ni(II) g”1 at initial hydrogen ion concentration of 20 mg/l at 305 K for the particle size 150 300ìm. Dynamics of the system was studied with linearised forms of Lagergren, Ho and Webber Morris models.