Organic and inorganic nano-Fe3 O4 : Alga Ulva flexuosa-based synthesis, antimicrobial effects and acute toxicity to briny water rotifer Brachionus rotundiformis

Environmental Pollution
Sakineh MashjoorMojtaba Alishahi

Abstract

Following the recent progress in magnetic nanotechnology, concern over the optimal benefits and potential risks of iron oxide nanoparticles (Fe NPs), has increased. Hence, to minimize the negative impacts of inorganic Fe NPs, we report the phyco-synthesis and characterization of superparamagnetic Fe3O4 NPs via reduction of ferric/ferrous chloride solution (2:1 M ratio; 88 °C) with green macroalga, Ulva flexuosa (wulfen) J.Agardh aqueous extract. The biogenic process is clean, eco-friendly, rapid, and facile to handle. These green fabricated magnetite NPs are characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), particle size analysers (PSA), zeta potential (ZP) measurement, and vibrating sample magnetometry (VSM) techniques. The results confirmed that the cubo-spherical, polydisperse of biosynthesized Fe3O4 NPs with an average diameter of 12.3 nm was formed. The antagonistic effects of algal extract, chemo-route and U. flexuosa-derived Fe3O4 MgNPs on selective human pathogenic microbes (i.e. n = 11) resulted in strong antibacterial and moderate antifungal activity. T...Continue Reading

Citations

May 28, 2019·Environmental Science and Pollution Research International·Tianhui ZhaoJohn P Giesy
Jan 28, 2021·Nanotoxicology·Roberto Carlos Valerio-GarcíaAna Laura Carbajal-Hernández
Feb 21, 2021·The Science of the Total Environment·Nour Sh El-Gendy, Hussein N Nassar
Aug 20, 2021·Critical Reviews in Food Science and Nutrition·Lucía CassaniAndrea Gomez-Zavaglia

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