The Freundlich Adsorption Isotherm is a mathematical model that describes how molecules adhere to surfaces. It is particularly useful for heterogeneous surfaces, where the adsorption capacity varies. The isotherm is expressed as a logarithmic equation, indicating that the amount of adsorbate increases with concentration but at a decreasing rate. This model is often applied in fields like environmental science and chemical engineering to understand processes such as pollutant removal from water. It helps predict how different substances interact with surfaces, aiding in the design of effective adsorption systems.