Fig. 4From: Adsorption of Cadmium Ions from an Aqueous Solution on a Highly Stable Dopamine-Modified Magnetic Nano-Adsorbenta Effect of the reaction time on the adsorption capacity of adsorbents (Fe3O4 and Fe3O4@PDA), b pseudo-first-order kinetics, and c pseudo-second-order kinetics of Fe3O4@PDABack to article page