Figure 3
From: Magnetic nanocomposite for lead (II) removal from water

(a) Pb2+adsorption equilibrium was achieved after 9 h of contact; inset: fitting of the data with the pseudo second-order kinetics model. (b) Adsorption efficiency increased with increasing adsorbent dose and at 2.0 mg/mL showed highest removal efficiency. (c) The effect of solution pH and (d) adsorption isotherm plot for Pb2+ adsorption.