Here’s a explanation:
Freundlich Adsorption Isotherm
- Definition: It describes how gas or solute molecules are adsorbed on a solid surface, assuming that adsorption occurs in multiple layers and on a heterogeneous surface.
- Purpose: To relate the amount of substance adsorbed to its pressure (gas) or concentration (solution) at constant temperature.
Key Features:
- Adsorption can occur in more than one layer (multilayer adsorption).
- Surface sites are not equivalent (heterogeneous).
- Adsorption increases with concentration or pressure, but not linearly.
Applications:
- Used in water purification, soil chemistry, and adsorption of pollutants.
- Helps in studying adsorption behavior on non-uniform surfaces.
Simple tip:
- Freundlich isotherm → multilayer adsorption → heterogeneous surface → adsorption increases with concentration