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Decontamination of endocrine disruptors from water by graphene nanoplatelet/UiO-66 nanocomposites
(Elsevier B.V., 2022) Bayazit, Şahika Sena; Kurtulbaş, Ebru; Bilgin, Mehmet; Şahin, Selin
Zirconium-based metal–organic frameworks (UiO-66) and graphene nanoplatelets were chosen for preparing nanocomposites (GNP/UiO-66) in this study. The hydrothermal method was used for this purpose. Obtaining composite material was characterized by XRD, FTIR, SEM, BET surface area, and particle size distribution analysis. The size of nanocomposite was nearly 600–750 nm. The surface area was 910.581 m2/g. Adsorption of endocrine disruptors (diclofenac sodium and bisphenol A) from the water was performed by GNP/UiO-66. According to the amount of adsorbent experiments; BPA was adsorbed at 48.33 mg/g and the maximum adsorption efficiency of BPA is 28.53 %. The maximum DCF adsorption uptake was 120.95 mg/g at 0.0025 g, and adsorption efficiency was 99.02 % at 0.01 g. Both of the adsorbates followed PSO kinetic model and calculated qe values were 452.46 mg/g for DCF and 53.91 mg/g for BPA. According to Temkin and Freundlich isotherms, it is understood that temperature increasing causes decreasing of adsorption efficiencies of DCF and BPA. The Dubinin-Radushkevich isotherm parameters explained that DCF adsorption followed chemical adsorption mechanism and BPA adsorption followed physical adsorption mechanism. © 2022 Elsevier B.V.