Kinetic and mass transfer modelling of adsorption process of ketorolactromethamine drug onto the porous UiO-66 metal organic framework adsorbent

In this study, a comprehensive comparative analysis between various adsorption kinetic and mass transfer models were carried out to investigate and predict the adsorption process of ketorolactromethamine drug pollutant onto the porous UiO-66 metal organic framework. Primarily, a new kinetic model was developed and compared with Elovich and four different form of Pseudo second order kinetics. Moreover, various mass transfer models such as Weber and Morris, liquid film diffusion, Bangham's and Burt and McKay et al models were utilized for determination of mass transfer mechanism of drug molecules onto the adsorbent. Measured experimental data in laboratory were fitted with the abovementioned models and the results showed that Pseudo second order (Form 1) and subsequently developed new kinetic models, with R^2valuse of 0.999 and 0.994, respectively, could be utilized as the best models for description of the adsorption rate. In addition, investigation of the results of the mass transfer models illustrated that both film diffusion and intraparticle diffusion had an important roles in the mass transfer mechanism and the boundary layer thickness and its effectiveness increases with increasing the drug concentration in adsorption process.