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Plots of the fitting of the experimental data with Langmuir, Freundlich, BET, and Dubinin–Radushkevich for RhB and OFLOX. Adsorption isotherm at 20 °C, pH = 7, and contact time = 24 h (25 mg of adsorbent PSPD-HPGs, volume of 4 mL, C0 of 4–0.01 mg/mL for RhB and 2–0.01 mg/mL for OFLOX).
