(3) and the Langmuir-Freundlich isotherm (also known as Sips isotherm) (4), where q m is the maximum adsorption capacity (mg/g), K .L. is the Langmuir constant (L/mg), K .F. is the Freundlich constant (mg/g) (L/mg) 1/n F related to the sorption capacity, n F is the Freundlich heterogeneity factor, K s is the Sips constant (L/mg), and n s is Sips heterogeneity constant. Kinetic adsorption data were also modelled, using Pseudo-first order (PFO) (5) and Pseudo-second order (PSO) (6) kinetic models where t is the adsorption time, k