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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:26 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Polymer Physics
Title:
Zero valent iron powders: synthesis and characterization
Authors:
Simona Liliana ICONARU (1), Gabriel PREDOI (2), Carmen CIMPEANU (3), Monica Luminita BADEA (1), George A. STANCIU (4), Radu HRISTU (4), Stefania RAITA (2), Daniela PREDOI (1)
Affiliation:
1) Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, Romania;
2) Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania;
3) Faculty of Land Reclamation and Environmental Engineering, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti Blvd, Sector 1, 011464 Bucharest, Romania;
4) Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania;
*corresponding author: dpredoi@gmail.com
E-mail
dpredoi@gmail.com
Keywords:
zero valent iron, As(3+), water decontamination, cytotoxicity
Abstract:
Due to technological development and industrialization in recent years, many areas have been contaminated with hazardous waste that contribute to the widespread contamination of soil and groundwater worldwide. Arsenic-contaminated drinking water has been found to cause serious health problems. In this context, over the years, studies have been conducted on obtaining nanoparticles for their use in the depollution of contaminated solutions. Zero-valent iron powders (Fe0) with nanometric dimensions were synthesized by coprecipitation method. Morphological characterization of Fe0 powders was performed by scanning electron microscopy (SEM) and results highlight both the nanoscale size of the powders and the fact that the powders are homogeneous and the particles have a spherical shape. The EDS spectrum of Fe0 nanoparticles revealed the presence of iron (Fe) in the investigated sample. The ability of As3 + ions to be removed by Fe0 powders was investigated by batch experiments and by monitoring the concentration of As3 + in aqueous solutions. The results of the studies showed that the efficiency of removal of As3 + ions by zero-valent iron powders was around 90%. In vitro studies on the cytotoxicity of Fe0 nanoparticles before and after removal experiments of aqueous arsenic ions from contaminated solutions was evaluated using the MTT viability test (using an HeLa cell line). The Fe0 powders did not show a high toxicity showing a behavior similar to that of the control culture after an incubation period of 24h, which indicates a good biocompatibility. On the other hand, in the case of Fe0 samples recovered after the removal experiments of arsenic ions from contaminated solutions, it was observed that they have a toxicity correlated with the concentration of As3+ from the contaminated solution. Therefore, Fe0 powders could be used successfully in the development of new technologies for depollution of waters contaminated with As3 + ions.
Acknowledgement:
This research was funded by the Romanian Ministry of Research and Innovation through the project PN-III-P1-1.2-PCCDI-2017-0134/contract no. 23PCCDI/2018.
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