Langmuir, Freundlich, Temkin and Dubinin–Radushkevich Isotherms Studies of Equilibrium Sorption of Zn 2+ Unto Phosphoric Acid Modified Rice Husk

Equlibrium sorption of the phosphoric acid modified rice husk was studied.The Physico-chemical properties of the modified rice husk were determined.The equilibrium sorption data were fitted into Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) isotherms.Of the four adsorption isotherm, the R 2 value of Langmuir isotherm model was the highest.The maximum monolayer coverage (Q o ) from Langmuir isotherm model was determined to be...