Question

1. An adsorption experiment was performed in which various amount of powder activated carbon PAC) was placed in 12 vials with 20ml of phenol solution at concentration of 100 mg L. The mixture was agitated for 24 hours and then the equilibrium phenol concentration C was determined for each vial by HPLC listed as follow Mass of PAC in Vial # Cc (mg L) 92.46 1.3 4.8 12.1 12.2 20.3 20.5 54.4 54.5 8.8 79.0 77.07 6.81 46.77 46.53 27.54 27.36 3.96 10 2.97 2.75 a) Compute the sorption (q:) for each vial in ugg b) Compute the coefficients for the Linear, Freundlich, Langmuir and BET isotherms (Cs for phenol may be assumed to be 60000 mgL). Linear: K Langmuir. a, b Freundlich Kf ln Plot resulting isotherms and experimental data on single graph (q Vs C) d) Discuss the results. Which Isotherm is the "best2

Answer 1

Volume of phenol solution = 20 mL = 20/1000 L concentration = 100 Mg/L