Utilization of Macadamia Nutshell Residue for the Synthesis of Magnetic Activated Carbon toward Zinc (II) Ion Removal

Figure 10

Pseudo-first-order model (a), pseudo-second-order model (b), Elovich kinetics model (c), and intraparticle diffusion kinetics model (d) for the adsorption of Zn²⁺ ion by the AC/Fe₃O₄ composite.

(a)

(b)

(c)

(d)