985853.fig.004a
(a)
985853.fig.004b
(b)
Figure 4: (a) Effect of the contact time on adsorption of Cu(II) by selected adsorbent at , adsorbent dosage (0.5 g RDP and 0.2 g ADP), initial concentration 50 mg/L. (b) Effect of the contact time on adsorption of Cd(II) by selected adsorbent at , adsorbent dosage (0.5 g RDP and 0.2 g ADP), initial concentration 50 mg/L.