times above 60 min were ignored. Therefore, an equilibrium
time of 60 min was selected for all further studies. With an
increase in the initial concentration of metal ions from 50 to
400 mg LK1 the extent of removal increased from 56%
(1.41 mg g1) to 95% (18.98 mg g1) for Pb(II). The
kinetic rate constant was determined using these data
assuming a pseudo-second order model. This can be
expressed as (1);