Full Text

Turn on search term navigation

Copyright © 2022 Payam B. Hassan et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0/

Abstract

Magnetic nanoparticles of iron oxide (Fe3O4 NPs) were prepared using a biosynthetic method to investigate their potential use as an adsorbent for adsorption of Pb(II) and Cd(II) from the aqueous solution. The present study for the first time used the magnetite nanoparticles from leaf extract of Portulaca oleracea for the removal of Pb(II) and Cd(II) metal ions. Characterizations for the prepared Fe3O4 NPs (PO-Fe3O4MNPs) were achieved by using X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDX), transmittance electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy. The batch adsorption process has been performed to study the effect of various parameters, such as contact time, pH, temperature, initial metal concentration, and adsorbent dose. The optimum pH for Cd(II) and Pb(II) adsorption was 6. The removal of heavy metals was found to increase with adsorbent dosage and contact time and reduced with increasing initial concentration. Langmuir, Freundlich, Khan, and Toth isotherms were used as adsorption isotherm models. The adsorption data fitted well with the Freundlich isotherm model with correlation coefficient (R2>0.94). The maximum adsorption capacities (Qmax) at equilibrium were 177.48 mg/g and 108.2267 mg/g for Cd(II) and Pb(II), respectively. The kinetic analysis showed that the overall adsorption process was successfully fitted with the pseudo-second-order kinetic model. The calculated thermodynamic parameters (G°, H°, and S°) showed that the adsorption of Cd(II) and Pb(II) ions onto PO-Fe3O4MNPs was exothermic and spontaneous. These results demonstrate that biogenic synthesized PO-Fe3O4MNPs are highly efficient adsorbents for the removal of Pb(II) and Cd(II) ions from contaminated water.

Details

Title
Cadmium and Lead Removal from Aqueous Solution Using Magnetite Nanoparticles Biofabricated from Portulaca oleracea Leaf Extract
Author
Hassan, Payam B 1   VIAFID ORCID Logo  ; Rasheed, Rezan O 1   VIAFID ORCID Logo  ; Zargoosh, Kiomars 2   VIAFID ORCID Logo 

 Department of Biology, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani City, Kurdistan Region, Iraq 
 Department of Chemistry, Isfahan University of Technology, Isfahan, Iran 
Editor
Haisheng Qian
Publication year
2022
Publication date
2022
Publisher
Hindawi Limited
ISSN
16874110
e-ISSN
16874129
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2707457805
Copyright
Copyright © 2022 Payam B. Hassan et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0/