The adsorption according to Freundlich is calculated via:

with

c_s = concentration of the substances adsorbed in the matrix [kg/kg]

𝜒₁ = 1st Freundlich isotherm [m³(fluid)/kg(matrix)]

𝜒₂ = 2nd Freundlich isotherm [-].

ρ₀ = Fluid density [kg/m³],

c = concentration of substances dissolved in the fluid [kg/kg]

Parameter variation for adsorption according to Freundlich

Adsorption according to Langmuir