STUDY ON THE CO-ADSORPTION OF Cu(II) AND Zn(II) BY THE COMPOSITE MATERIAL OF THE U MINH PEAT AND COAL SLAG

Abstract

The composite material which has been simply prepared from U Minh peat and coal slag are used to adsorb
the heavy metal ions in the aqueous medium. Characterizations from the images of SEM and BET show that
the material 's surface look a rough surface with the specific area of 12.45 m².g-1
. The adsorption
equilibrium is obtained after 120 minutes. The adsorption capacity (qe) for Cu(II) and Zn(II) are 17.90
mg.g-1 and 19.75 mg.g-1
respectively. The adsorption kinetics of these adsorption processes are in the
apparent second-order type 2 equation. The calculations of the adsorption isothermal from the experimental
data indicate these adsorption processes have the high fitness in both models of Langmuir and Freundlich.
All results express that this material can treat the water pollution contaning Cu(II) and Zn(II).