Green synthesis of Ag nanoparticles from Argemone mexicana L. leaf extract coated with MOF-5 for the removal of metronidazole antibiotics from aqueous solution

Babalola Aisosa Oni; Samuel Eshorame Sanni; Kingsley Chukwunonso Agu; Olusegun Stanley Tomomewo

doi:10.1016/j.jenvman.2023.118161

Green synthesis of Ag nanoparticles from Argemone mexicana L. leaf extract coated with MOF-5 for the removal of metronidazole antibiotics from aqueous solution

J Environ Manage. 2023 Sep 15:342:118161. doi: 10.1016/j.jenvman.2023.118161. Epub 2023 May 19.

Authors

Babalola Aisosa Oni¹, Samuel Eshorame Sanni², Kingsley Chukwunonso Agu³, Olusegun Stanley Tomomewo⁴

Affiliations

¹ Department of Chemical Engineering, China University of Petroleum, 102200, Beijing City, China; Department of Energy Engineering, University of North Dakota, 58203, Grand Forks, ND, United States. Electronic address: babalola.oni@covenantuniversity.edu.ng.
² Department of Chemical Engineering, Covenant University, Km 10 Idiroko Road, PMB 1023, Ota, Nigeria.
³ Department of Chemistry and Biochemistry, Central Michigan University, 49858, Mount Pleasant, MI, United States; Department of Medical Biochemistry, University of Benin, 300001, Benin City, Nigeria.
⁴ Department of Energy Engineering, University of North Dakota, 58203, Grand Forks, ND, United States.

PMID: 37210822
DOI: 10.1016/j.jenvman.2023.118161

Abstract

There are growing concerns about the toxicity of metronidazole (MNZ) antibiotics in wastewater, which must be removed. This study used AgN/MOF-5 (1:3) to investigate the adsorptive removal of MNZ antibiotics from wastewater. Green synthesis of Ag-nanoparticles was from Argemone mexicana leaf aqueous extract blended with the synthesized MOF-5 in 1:3 by proportion. The adsorption materials were characterized by scanning electron microscope (SEM), N₂ adsorption-desorption analysis, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The surface area increased due to the appearance of micropores. Besides, the efficiency of AgN/MOF-5 (1:3) for MNZ removal was evaluated by adsorption properties, including key influential parameters (adsorbent dosage, pH, contact time, etc.) and adsorption mechanism, kinetics/isotherms. The results from the adsorption process conformed to pseudo-second-order kinetics (R² = 0.998) and well fitted with the Langmuir isotherm having 191.1 mg/g maximum adsorption capacity. The adsorption mechanism of AgN/MOF-5 (1:3) was due to the interactions of π-π stacking, Ag-N-MOF covalent bonding and hydrogen bonding. Thus, AgN/MOF-5 (1:3) is a potential adsorbent for the removal of aqueous MNZ. The adsorption process is endothermic, spontaneous, and feasible based on the obtained thermodynamic parameter of ΔH^O and ΔS^O having 14.72 and 0.129 kJ/mol respectively.

Keywords: Ag-nanoparticles; Green chemistry; Hydrogen bonding; Metronidazole; Wastewater; π-π Stacking.

MeSH terms

Anti-Bacterial Agents / analysis
Argemone*
Metal Nanoparticles*
Metronidazole / analysis
Metronidazole / chemistry
Plant Extracts
Silver / analysis
Wastewater
Water / chemistry
Water Pollutants, Chemical* / chemistry

Substances

Anti-Bacterial Agents
Metronidazole
Wastewater
Water Pollutants, Chemical
Silver
Water
Plant Extracts