Figure 4

Pseudo-first-order kinetics (A), Pseudo-second-order kinetics (B), Intraparticle diffusion kinetics (C) and Bangham kinetics (D) for adsorption of MB (m = 6 mg, C0 = 30 mg L−1, V = 25 mL, pH = 6, temperature was 298 K), MV (m = 10 mg, C0 = 30 mg L−1, V = 25 mL, pH = 6, temperature was 298 K) and Pb(II) (m = 10 mg, C0 = 30 mg L−1, V = 10 mL, pH = 6, temperature was 298 K).