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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
OFL removal (%) from tap and river water samples and effluent from WWTPS with HNT, HNT/Fe3O4-C, HNT/Fe3O4-H, and HNT/Fe3O4-SG (Experimental conditions: sorbent 20 mg, 10 mL tap water, OFL initial concentration 10 µg L−1, n = 3, RSD < 10%).