20.500.12556/DKUM-86492 Microwave Synthesis of Poly(Acrylic) Acid-Coated Magnetic Nanoparticles as Draw Solutes in Forward Osmosis Polyacrylic acid (PAA)-coated magnetic nanoparticles (MNP@PAA) were synthesized and evaluated as draw solutes in the forward osmosis (FO) process. MNP@PAA were synthesized by microwave irradiation and chemical co-precipitation from aqueous solutions of Fe2+ and Fe3+ salts. The results showed that the synthesized MNPs have spherical shapes of maghemite Fe2O3 and superparamagnetic properties, which allow draw solution (DS) recovery using an external magnetic field. Synthesized MNP, coated with PAA, yielded an osmotic pressure of ~12.8 bar at a 0.7% concentration, resulting in an initial water flux of 8.1 LMH. The MNP@PAA particles were captured by an external magnetic field, rinsed in ethanol, and re-concentrated as DS in repetitive FO experiments with deionized water as a feed solution (FS). The osmotic pressure of the re-concentrated DS was 4.1 bar at a 0.35% concentration, resulting in an initial water flux of 2.1 LMH. Taken together, the results show the feasibility of using MNP@PAA particles as draw solutes. magnetic nanoparticles microwave synthesis polyacrilic acid osmotic pressure draw solution forward osmosis rečne usedline težke kovine ekstrakcija true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/ © 2023 by the authors Članek v reviji 2023-12-05 14:03:19 2023-12-05 14:10:41 2023-12-06 03:11:18 0000-00-00 00:00:00 2023 0 0 15 str. iss. 11, [Article no.] 4138 Vol. 16 2023 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 2023-05-30 2023-06-01 532.71 154963715 10.3390/ma16114138 1996-1944 materials-16-04138-v2.pdf materials-16-04138-v2.pdf 1 EE0696B1256B6D1ED3AEA31ED3A7743E 85c7130c55ae67cccb4d306d9471eb67cabb0ac98f0aa5c324d1c134e9ef746b f2ac0f47-936e-11ee-add4-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174627 https://www.mdpi.com/1996-1944/16/11/4138 0 0316e998-936f-11ee-add4-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174628 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0