To assess
and differentiate the effect of film and intraparticle diffusion resistances
on adsorption kinetics, the Weber-Morris equation, which
was derived from Fick’s law for adsorbent diffusing in spherical
adsorbent particles at a short adsorption time, can be used to
establish the relationship between the adsorbent uptake (q) and
the square root of adsorption time (t
1=2) [52] as: