| Title: | Synthesis of magnetic nanoparticles with covalently bonded polyacrylic acid for use as forward osmosis draw agents |
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| Authors: | ID Ban, Irena (Author)
ID Drofenik, Mihael (Author)
ID Bukšek, Hermina (Author)
ID Petrinić, Irena (Author)
ID Hélix-Nielsen, Claus (Author)
ID Vohl, Sabina (Author)
ID Gyergyek, Sašo (Author)
ID Stergar, Janja (Author) |
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| Files: |  Synthesis_of_magnetic_nanoparticles_w-Ban-2023.pdf (1,92 MB)
MD5: E4485A6D90D2D7D09B13F6A48B25AAF3
 https://pubs.rsc.org/en/content/articlelanding/2023/EW/D2EW00539E
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | Multicoated magnetite (Fe3O4) magnetic nanoparticles (MNPs) with polyacrylic acid (PAA) as a terminal hydrophilic ligand were synthesized and examined for use as a draw solution (DS) agent in forward osmosis (FO). After coating superparamagnetic iron-oxide MNPs with (3-aminopropyl)triethoxysilane (APTES) the carboxyl groups of PAA were bound to APTES amino groups via the crosslinker 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) forming a peptide bond resulting in stable water-soluble particles (MNP@APTES@PAA) with a concentration-normalised osmotic pressure of 1.56 bar L g−1. The MNP@APTES@PAA solution was evaluated as a DS in two FO filtrations with deionized (DI) water as a feed solution (FS): one using freshly prepared MNP@APTES@PAA and one using magnetically recovered (re-concentrated) MNP@APTES@PAA. The resulting MNP@APTES@PAA nanocomposites exhibit good colloidal stability in aqueous solution with a concentration-normalized osmotic pressure of 1.56 bar L g−1. This is 12-fold higher than that in our previous studies of poly-sodium-acrylate coated MNPs and 3-fold higher than that of citric acid coated MNPs. The water recoveries of the two filtrations were 25.7% and 13.6%, respectively, after 2 h of FO filtration time resulting in a DS osmotic pressure of 2.5 bar with a concentration of 4.3 g L−1 and a DS osmotic pressure of 2.6 with a concentration of 3.7 g L−1 respectively. |
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| Keywords: | magnetic nanoparticle, forward osmosis, draw solution, osmose |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 13.07.2022 |
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| Article acceptance date: | 24.11.2022 |
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| Publication date: | 28.11.2023 |
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| Publisher: | Royal Society of Chemistry |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 442-453 |
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| Numbering: | Vol. 9 |
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| PID: | 20.500.12556/DKUM-85027  |
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| UDC: | 620.3 |
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| ISSN on article: | 2053-1419 |
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| COBISS.SI-ID: | 132088835 |
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| DOI: | 10.1039/D2EW00539E |
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| Publication date in DKUM: | 16.08.2023 |
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| Views: | 612 |
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| Downloads: | 23 |
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| Metadata: |    |
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| Categories: | Misc.
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