D. Analysis of Adsorption Kinetics
The kinetic study of metal ion adsorption is important to
give insight into the adsorption rate, provide information on
the contact time required for considerable adsorption to take
place and also the factors affecting or controlling the
adsorption rate. The adsorption of Cu(II) by chicken eggshells
at different contact time is shown in Fig. 5. The adsorption
occurred rapidly at the first 15 minutes and almost 100%
adsorption efficiency of Cu(II) was attained after 60 minutes.