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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 23:05 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Polymer Physics
Title:
Polymer coated Fe3O4 nanocomposite for water remediation applications
Authors:
Stefania RAITA (1), Gabriel PREDOI (1), Monica Luminita BADEA (2), Carmen CIMPEANU (3), George A. STANCIU (4), Radu HRISTU (4), Simona Liliana ICONARU (2), Daniela PREDOI (2)
Affiliation:
1) Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania;
2) Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, 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:
iron oxide nanocomposites, water remediation, polymer coating
Abstract:
Functionalized nanoparticles are an emerging area of materials science with a great potential to solve problems on a global scale by manufacturing nanoparticles with controlled properties [1-2]. Magnetite (Fe3O4) and maghemite (γ-Fe2O3) are some of the most studied forms of iron oxides due to their special properties at the nanometer scale (large specific surface, superparamagnetism, etc.) [3-5]. Potential polymers used to coat iron oxide nanoparticles were chosen from the category of biopolymers, mostly from the family of natural polysaccharides. Cellulose is a linear linear polysaccharide polymer with many units of glucose monosaccharides and is a major component in the rigid cell walls of plants. Cellulose-functionalized Fe3O4 and Fe3O4 powders recovered after decontamination experiments (As:Fe3O4 and As:Fe3O4_Cz) were analyzed by X-ray diffraction and the obtained diffractograms showed the existence of diffraction maxima corresponding to cubic magnetite. Supplementary maxima associated with arsenic have not been identified. Scanning electron microscopy studies have shown that the As:Fe3O4 and As:Fe3O4_Cz samples have nanometric dimensions and have a spherical morphology. The EDX spectra confirmed the presence of the constituent elements of iron oxide (Fe, O) and also confirmed the presence of arsenic in the analyzed samples. FTIR and Raman studies have highlighted the presence of magnetite-specific vibration bands. In the case of the As:Fe3O4_Cz sample, a maximum can be observed that can be attributed to the presence of cellulose. None of the analyzed samples had an inhibitory effect on the strains tested by Escherichia coli (control strain ATCC 25922) and Shigella flexneri. Optical microscopy visualization of BHK21 cell morphology after incubation for 24 hours with arsenic-contaminated solutions showed that arsenic ions had a toxic effect on BHK21 cell morphology and also inhibited their proliferation. The results of the in vivo tests showed the toxic character of arsenic ions (even in small quantities in drinking water).
References:
[1]. Silvo Hribernik, Majda Sfiligoj-Smole, Marjan Bele, Saso Gyergyek, Janko Jamnik, Karin Stana-Kleinschek, Synthesis of magnetic iron oxide particles: Development of an in situ coating procedure for fibrous materials, Colloids and Surfaces A: Physicochem. Eng. Aspects 400 (2012) 58– 66.
[2]. Carmen Steluta Ciobanu, Simona Liliana Iconaru, Eniko Gyorgy, Mihaela Radu, M. Costache, A. Dinischiotu, P. Le Coustumer, K. Lafdi, D. Predoi ,Biomedical properties and preparation of iron oxide-dextran nanostructures by MAPLE technique”, Chemistry Central Journal, 6:17, doi:10.1186/1752-153X-6-17, 2012, pp.1-12.
[3]. R.H. Kodama, Magnetic nanoparticles, Journal of Magnetism and Magnetic Materials 200 (1–3) (1999) 359–372.
[4]. Alina Mihaela Prodan, Simona Liliana Iconaru, Carmen Steluta Ciobanu, Mariana Carmen Chifiriuc, Mihai Stoicea, and Daniela Predoi, “Iron Oxide Magnetic Nanoparticles: Characterization and Toxicity Evaluation by In Vitro and In Vivo Assays,” Journal of Nanomaterials, vol. 2013, Article ID 587021, 10 pages, 2013. doi:10.1155/2013/587021.
[5]. Simona Liliana Iconaru, Alina Mihaela Prodan, Philippe Le Coustumer, and Daniela Predoi, “Synthesis and Antibacterial and Antibiofilm Activity of Iron Oxide Glycerol Nanoparticles Obtained by Coprecipitation Method,” Journal of Chemistry, vol. 2013, Article ID 412079, 6 pages, 2013. doi:10.1155/2013/412079.
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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