Author/Authors :
Abd El fatah، m نويسنده Petrochemical Engineering Department, Faculty of Engineering, Pharos University, Alexandria, Egypt , , Ossman، m.e نويسنده Petrochemical Engineering Department, Faculty of Engineering, Pharos University, Alexandria, Egypt ,
Abstract :
In this study metal oxide nano powder namely NiO nanopowder was prepared .The produced
metal oxide was characterized and used as potential adsorbent for the removal of Pb and Zn from aqueous
solution. The rate of uptake of the Pb and Zn are rapid in the beginning and the time required for equilibrium
adsorption is 120 min .The time of equilibrium as well as time required to achieve a definite fraction of
equilibrium adsorption is independent of initial concentration. The results showed that the removal of Pb
increased significantly as the pH increased from 2.0 to 6.0 and approach a plateau at pH range of 6.0–9.0.,
while the removal of Zn increased significantly as the pH increased from 2.0 to 9.0. The adsorption of pb onto
NiO follows the Langmiur isotherm, while the adsorption of Zn onto NiO follows the Freundlish isotherm .
The pseudo second order kinetic model provided good correlation for the adsorption of Pb onto NiO nanopowder
while the pseudo first order kinetic model provided good correlation for the adsorption of Zn onto NiO
nanopowder.
