Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Selective Adsorption of Aqueous Diclofenac Sodium, Naproxen Sodium and iBuprofen Using a Stable Fe3O4-FeBTC Metal Organic Framework

Version 1 : Received: 17 February 2021 / Approved: 17 February 2021 / Online: 17 February 2021 (14:40:14 CET)

How to cite: Castañeda Ramírez, A.A.; García, E.R.; López Medina, R.; Contreras Larios, J.L.; Suarez Parra, R.; Maubert Franco, A.M. Selective Adsorption of Aqueous Diclofenac Sodium, Naproxen Sodium and iBuprofen Using a Stable Fe3O4-FeBTC Metal Organic Framework. Preprints 2021, 2021020399 (doi: 10.20944/preprints202102.0399.v1). Castañeda Ramírez, A.A.; García, E.R.; López Medina, R.; Contreras Larios, J.L.; Suarez Parra, R.; Maubert Franco, A.M. Selective Adsorption of Aqueous Diclofenac Sodium, Naproxen Sodium and iBuprofen Using a Stable Fe3O4-FeBTC Metal Organic Framework. Preprints 2021, 2021020399 (doi: 10.20944/preprints202102.0399.v1).

Abstract

Abstract: This work is part of the interest of solving the problems of water contamination with last generation pollutants, for which a novel and in an aqueous medium FeBTC material incorporated with magnetite nanoparticles was proposed. That material was synthesized by in situ solvothermal method, the Fe3O4 nanoparticles were added during the Fe-BTC MOF synthesis and used in the drug’s adsorption. The materials were characterized by XRD, FTIR and Raman spectroscopy, and N2-physisorption at 77 K. Fe3O4-FeBTC material showed a maximum adsorption capacity of 357.1 mg g−1 for diclofenac sodium, 70.9 mg g−1 for naproxen sodium, and 122.9 mg g−1 for Ibuprofen. A pseudo-second-order kinetic model can describe the adsorption process, and the thermodynamic study revealed that the adsorption of the three drugs was a feasible, spontaneous, and exothermic process. The incorporation of magnetite nanoparticles in the FeBTC considerably increased the adsorption capacity of pristine FeBTC. Also, hybridization of the FeBTC with magnetite nanoparticles reinforced the most vulnerable part of the MOF, increasing its thermal and aqueous media stability. The electrostatic interaction, H-bonding, and interactions in the open-metal sites played a vital role in drug adsorption. The competition of sites in the multicomponent mixture's adsorption showed selective adsorption at diclofenac sodium and naproxen sodium.

Keywords

Metal Organic Frameworks MOFs; Non-Steroidal Anti-Inflammatory Drugs NSAIDs; FeBTC; Magnetite

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