

Chemical Adsorption Micropore filling Finely divided surface Limiting amount adsorbed as p/po approaches 1 Langmuir Reduces to the familiar form of the Langmuir equation for associative adsorption At low coverage, the Langmuir equation converges with Henry's Law 33 34 Tuesday.

Type I Isotherm - Langmuir Isotherm Mono-layer adsorption.A variation in the slope between 0 and 1 is associated with a chemisorption process, which is more heterogeneous as the value gets closer to 0. It can be applied for non ideal sorption on heterogeneous surfaces, as well as, multilayer sorption. Explanation: The Freundlich isotherm was the first isotherm model proposed for sorption processes.Langmuir and Freundlich isotherm models were used in this study (Danish et al. The adsorption isotherm, which describes the relationship between the concentration of the adsorbed material on the adsorbent surface and the remaining material in the solution, provides an essential basis for the design and optimization of the adsorption system.The surface is uniform and all sites are equivalent. The BET isotherm was a generalization of the Langmuir isotherm and assumes the following: 1. and Teller3 (BET) and despite some rather drastic assumptions, it survives as the most useful theory of physical adsorption to date.
