SEARCH Articles Figures Tables Adsorption Freundlich equation applied Adsorption equation Adsorption isotherms Langmuir-Freundlich equation Adsorption isotherms generalized Freundlich equation Equation Freundlich Freundlich Freundlich adsorption Freundlich adsorption isotherm equation Freundlich equation soil adsorption coefficients Solvent adsorption Freundlich equation