Removal of Ni(II) and Zn(II) from Aqueous Media …
567
Fig. 5 Effect of adsorbent
mass on adsorption capacity
of ABC
0.10
0.15
0.20
0.25
0.30
0
20
40
60
80
100
Adsorption Capacity q (mg/g)
Adsorbent Dose (g)
Zn(II)
Ni(II)
Fig. 6 Effect of initial
concentration on adsorption
capacity of ABC
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
Adsorption capacity q (mg/g)
Initial concentration of Zn(II)/Ni(II) (mg/L)
Zn(II)
Ni(II)
The maximum removal efficiency for Zn(II) was at 69.79% while that for Ni(II), it
is on higher side at 86%.
3.4 Effect of Initial Ion Concentration
As a well-known fact, that only certain amount of adsorbate can adsorb on the surface
of a given mass of adsorbent. As such, the initial ion concentration of metals plays
a vital role in the overall efficiency of the process of adsorption. In the present case,
the initial ion concentrations of both the metals under study, were varied from 25
to 150 mg/l to evaluate this effect. The results of which are depicted in Fig. 6. At
lower concentrations, less metal ions were available for both the solutions, therefore