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Adsorption profiles Langmuir (—) and Freundlich (…) for Ofloxacin (OFL) on HNT (■ black), HNT/Fe3O4-C (● red), HNT/Fe3O4-H (▲ blue) and HNT/Fe3O4-SG (▼ green) (Experimental conditions: Sorbent 20 mg, 10 mL OFL tap water solution from 25 to 200 mg L−1, RSD < 10%).
