The equilibrium data has been described using Langmuir and Freundlich isotherm models.  The maximum adsorption capacity of 341.30mg/g was observed for Cd(II) and 43.43mg/g for Hg(II) in accordance with Langmuir adsorption isotherm in the form of their chloro complexes.  The kinetic data fitted well with pseudo-second-order model, and equilibrium data was found to follow Freundlich isotherm model.  The calculated thermodynamic parameters showed that the adsorption process was feasible, exothermic and spontaneous. 
THERM