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. 2020 Jul 2;15(7):e0234964.
doi: 10.1371/journal.pone.0234964. eCollection 2020.

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

Muhammad Asif Asghar  1   2 , Erum Zahir  2 , Muhammad Arif Asghar  3 , Javed Iqbal  4 , Ahad Abdul Rehman  5
Affiliations

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

Muhammad Asif Asghar et al. PLoS One. .

Retraction in

Abstract

In this study, a facile, ecological and economical green method is described for the fabrication of iron (Fe), copper (Cu) and silver (Ag) nanoparticles (NPs) from the extract of Syzygium cumini leaves. The obtained metal NPs were categorized using UV/Vis, SEM, TEM, FTIR and EDX-ray spectroscopy techniques. The Fe-, Cu- and Ag-NPs were crystalline, spherical and size ranged from 40-52, 28-35 and 11-19 nm, respectively. The Ag-NPs showed excellent antimicrobial activities against methicillin- and vancomycin-resistance Staphylococcus aureus bacterial strains and Aspergillus flavus and A. parasiticus fungal species. Furthermore, the aflatoxins (AFs) production was also significantly inhibited when compared with the Fe- and Cu-NPs. In contrast, the adsorption results of NPs with aflatoxin B1 (AFB1) were observed as following order Fe->Cu->Ag-NPs. The Langmuir isotherm model well described the equilibrium data by the sorption capacity of Fe-NPs (105.3 ng mg-1), Cu-NPs (88.5 ng mg-1) and Ag-NPs (81.7 ng mg-1). The adsorption was found feasible, endothermic and follow the pseudo-second order kinetic model as revealed by the thermodynamic and kinetic studies. The present findings suggests that the green synthesis of metal NPs is a simple, sustainable, non-toxic, economical and energy-effective as compared to the others conventional approaches. In addition, synthesized metal NPs might be a promising AFs adsorbent for the detoxification of AFB1 in human and animal food/feed.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1
SEM images of metal nanoparticles (a) iron (b) copper and (c) silver nanoparticles.
Fig 2
Fig 2
TEM images of metals nanoparticles (a) iron (b) copper and (c) silver nanoparticles.
Fig 3
Fig 3
FTIR spectra of Syzygium cumini leaves extract and metal nanoparticles (a) Syzygium cumini leaves extract (b) iron (c) copper and (d) silver nanoparticles.
Fig 4
Fig 4
EDX spectra of metal nanoparticles (a) iron (b) copper and (c) silver nanoparticles.
Fig 5
Fig 5
UV-Visible spectra of metal nanoparticles (a) iron (b) copper and (c) silver nanoparticles.
Fig 6
Fig 6
Zone of inhibition of produced by iron, copper and silver nanoparticles against Staphylococcus aureus strains (a) MRSA and (b) VRSA.
Fig 7
Fig 7
Effect of different parameters on the adsorption of aflatoxin B1 using iron, copper and silver nanoparticles (a) Effect of nanoparticles amount (b) Effect of initial concentration of aflatoxin B1 (c) Effect of pH (d) Effect of incubation time and (e) Effect of incubation temperature. Blue Iron nanoparticles red copper nanoparticles green silver nanoparticles.
See this image and copyright information in PMC

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