Freundlich Adsorption Isotherms
#. Adsorption Isotherms : It is the plot of the mass of gas adsorbed per gram of adsorbent (x / m) versus equilibrium pressure at constant temperature. #. Freundlich Adsorption Isotherm : It gave an empirical relationship between the quantity of gas adsorbed by unit mass of solid adsorbent and pressure at a particular temperature. It can be expressed by the equation. x / m = kp 1/n …(i) Where, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure p, k and n are constants which depend on the nature of the adsorbent and the gas at a particular temperature. At low pressure, n = 1, i.e., x / m = kp At high pressure, n > 1, i.e., x / m = k (independent of p) Taking logarithm of Eq. (i) #. Freundlich Adsorption Equation for Solutions : x / m = kC 1/n where, C is the equilibrium concen...
