Enhanced photocatalytic degradation of dyes and antibiotics with biosynthesized FeMn2O4 nanocomposite under sunlight irradiation: isotherm and kinetic study

This study reports the biosynthesis of FeMn 2 O 4 nanocomposite (NC) using an aqueous leaf extract of Artemisia . The FeMn 2 O 4 NC was characterized by zeta potential, SEM, XRD, and FTIR. X-ray diffraction analysis confirmed that the biosynthesized FeMn 2 O 4 NC has a cubic crystal nature with a cr...

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Published in:Biomass conversion and biorefinery 2024-10, Vol.14 (20), p.25003-25014
Main Authors: Zohra, Rouiha, Meneceur, Souhaila, Mohammed, Hamdi Ali, Hasan, Gamil Gamal, Bouafia, Abderrhmane, Abdullah, Johar Amin Ahmed, Alharthi, Fahad, Eddine, Laouini Salah
Format: Article
Language:English
Subjects:
Biotechnology
Energy
Original Article
Renewable and Green Energy
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Summary:This study reports the biosynthesis of FeMn 2 O 4 nanocomposite (NC) using an aqueous leaf extract of Artemisia . The FeMn 2 O 4 NC was characterized by zeta potential, SEM, XRD, and FTIR. X-ray diffraction analysis confirmed that the biosynthesized FeMn 2 O 4 NC has a cubic crystal nature with a crystallite size of 28.45 nm. Scanning electron microscopy images showed that the FeMn 2 O 4 NC has a spherical shape. The optical bandgap energy of the FeMn 2 O 4 NC was estimated to be approximately 2.94 eV for direct bandgap and 1.27 eV for indirect bandgap. The photocatalytic activity of the FeMn 2 O 4 NC was evaluated for the degradation of amoxicillin and cephalexin antibiotics under sunlight irradiation, resulting in a degradation efficiency of 99% for both drugs. The FeMn 2 O 4 NC also exhibited excellent degradation efficiency against Congo Red (CR) and Methylene Blue (MB) dyes with about 83.23% and 100%, respectively, after just 40 min. The reaction kinetic calculations showed that the absorption of both dyes and antibiotics by the adsorbent followed a pseudo-first-order model. The equilibrium isotherms revealed that the amoxicillin and cephalexin absorption process through the synthesized magnetic nanocomposite was consistent with the Langmuir model. These findings suggest that the FeMn 2 O 4 NC can serve as a promising absorbent for the removal of amoxicillin and cephalexin antibiotics as well as MB and RC dyes from aqueous solutions. Graphical abstract
ISSN:2190-6815
2190-6823
DOI:10.1007/s13399-023-04497-y