Irena Ban (Avtor), Mihael Drofenik (Avtor), Hermina Bukšek (Avtor), Irena Petrinić (Avtor), Claus Hélix-Nielsen (Avtor), Sabina Markuš (Avtor), Sašo Gyergyek (Avtor), Janja Stergar (Avtor)

Povzetek

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.

Ključne besede

osmoza;magnetni nanodelci;sinteza;magnetic nanoparticle;forward osmosis;draw solution;osmose;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik: Royal Society of Chemistry
UDK: 620.3
COBISS: 132088835 Povezava se bo odprla v novem oknu
ISSN: 2053-1419
Št. ogledov: 286
Št. prenosov: 8
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: osmoza;magnetni nanodelci;sinteza;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 442-453
Letnik: ǂVol. ǂ9
Čas izdaje: 2023
DOI: 10.1039/D2EW00539E
ID: 19810179