Freundlich isotherm formula

The Freundlich isotherm formula is a mathematical equation used to describe the adsorption of a solute onto a solid surface. It is represented as:

q = K * C^n

Where:
- q is the amount of solute adsorbed per unit mass of solid (mg/g)
- C is the equilibrium concentration of solute in solution (mg/L)
- K is the Freundlich constant, which is related to the adsorption capacity of the solid
- n is the Freundlich exponent, which is related to the intensity of adsorption

The Freundlich isotherm is commonly used to describe non-ideal adsorption behavior, where the adsorption capacity of the solid surface is not constant over the entire range of concentrations.

$$x/m = K\cdot C^{1/n}$$

where:

- x is the mass of adsorbate adsorbed per unit mass of adsorbent
- m is the mass of adsorbent
- C is the equilibrium concentration of the adsorbate in the solution
- K and n are constants that depend on the adsorbent and adsorbate