ln qe= ln kf +
1
n
ln Ce (11)
where kf ((mg g
−1
) (L mg-1
)
1/n
) is a constant indicative of the
adsorption capacity of the adsorbent and n is an empirical con-stant related to the magnitude of the adsorption driving force. In
particular, an n value falling between 1 and 10 indicates a favorable
adsorption