Abstract— The use of chicken eggshell as adsorbent for the
removal of copper (II) from water was investigated in the present
study. The effects of different parameters such as pH of the
solution, agitation rate and contact time on the adsorption
process were studied. The optimum conditions for Cu(II)
adsorption by chicken eggshell were found to be at pH 7 with the
agitation rate of 350 rpm. Equilibrium data were analyzed by
Langmuir and Freundlich isotherm models and the data were
fitted well to Freundlich isotherm model. The adsorption
kinetics data were evaluated by the pseudo-first-order and
pseudo-second-order models. The data were well correlated with
the pseudo-second-order kinetic model, which indicated that
chemisorption processes could be the rate-limiting step in the
adsorption process. The results show that chicken eggshell has
the potential to be used as biosorbent for adsorption of copper
(II) from water.