Fig. 3From: Determination of some heavy metals from aqueous solutions using modified Amberlite XAD-4 resin by selective solid-phase extractionEffect of amount of adsorbent on the recovery of Pb(II) and Cd(II) by modified Amberlite XAD-4 resin (pH:5, initial metal concentration: 20Â mg/L, flow rate: 2.5Â mL/min)Back to article page