Adsorption isotherm provides important models in the
description of adsorption behaviour. It describes how the adsorbate interacts with the adsorbent and offers explanation
for the nature and mechanism of the adsorption process. When the adsorption reaction reaches equilibrium state, the
adsorption isotherm can indicate the distribution of adsorbate
molecules between the solid phase and the liquid phase (Tan
et al., 2008). Equilibrium isotherm data obtained from the dif-
ferent models provide important information on adsorption
mechanisms and the surface properties and af nities of the
adsorbent (Santhi et al., 2010). Therefore it is essential to
establish the most appropriate correlation of equilibrium
curves to optimize the conditions for designing adsorption systems. In this present work, Langmuir, Freundlich and Temkin isotherms were employed to investigate the adsorption behaviour and was found that all three could be used to explain adsorption behaviour.