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Pseudo-second-order kinetics for the adsorption of MB onto (a) DA and (b) PA. Intraparticle diffusion model for the adsorption of MB onto (c) DA and (d) PA (DA: pH = 8, 0.00001 kg, PA: pH = 6, 0.00001 kg, MB: 1.5 × 10–2 to 7.81 × 10–2 mol/m3, 5 × 10–5 m3, T = 298 K).
