Fig. 8.

Effect of coexisting cations and ionic strength on the adsorption of MB on Fe₃O₄/PCC MNPs. As shown as Fig. 8, the blank line represent the adsorption of MB without any coexisting ions, the red line reperesent the effect on MB adsorption with 10 mM NaCl, the blue line reperesent the effect on MB adsorption with 50 mM NaCl, the magenta line reperesent the effect on MB adsorption with 10 mM MgSO₄, the olive line reperesent the effect on MB adsorption with 50 mM MgSO₄, the navy line reperesent the effect on MB adsorption with 0.1 mM FeCl₃, the violet line reperesent the effect on MB adsorption with 0.2 mM FeCl₃, the purple line reperesent the effect on MB adsorption with 0.1 mM FeCl₃