The homogeneous particle diffusion model with the effective diffusion coefficient satisfactorily fits the whole kinetics for MN 200 at temperatures of 35, 45, 55 °C (this is also where Weber-Morris gave closer-to-zero intercept shown in Fig. 1a, which means smaller effect of film diffusion on adsorption kinetics), while the model generally over-predicts the early part of the other kinetics plots, which is associated to the macropores where the internal film diffusion model applies.