Aende, A, Gardy, J orcid.org/0000-0003-1806-4056, Aslam, Z et al. (5 more authors) (2022) A novel highly osmotic K/Fe₃O₄/CNF magnetic draw solution for salty water desalination. Desalination, 538. 115903. ISSN 0011-9164
Abstract
Forward osmosis (FO) is increasingly being studied as an alternative desalination technique to the other conventional desalination technologies, owing primarily to its low energy potential. However, the co-opted energy limitations in the draw solution (DS) regeneration stage in FO desalination processes and the lack of effective DS have hampered FO's implementation for potable water application on an industrial scale. In this work, we explored the Donnan principle to engineer a DS material having the duality of magnetic and solar-thermal separability functionalities from a sustainability viewpoint whilst exploiting a careful selection of material properties. A novel potassium functionalised iron oxide doped carbon nanofibres (K/Fe₃O₄/CNF) magnetic nanoparticles (MNPs) was successfully synthesised for FO desalination applications, utilising an eco-friendly strategy that improves hydrophilicity of DS without polymers. The novel DS obtained a significant osmotic pressure (86.1 bar), whilst it FO performance showed a small reverse salt flux (RSF) and specific reverse salt flux (SRSF) values of 0.10 gMH and 0.004 g/L, respectively. These values compare to at least <10 % of most RSF and SRSF values reported in the literature. The facile DS synthesis strategy adopted herein will potentially open a new route to preparing other DS nanomaterials with unique multi functionalities and enhanced hydrophilicity devoid of polymers. Whilst magnetic DS re-concentration may be achievable, additional research is required to appraise this methodology's overall energy implications and economic advantages over existing DS recovery methods.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 Published by Elsevier B.V. This is an author produced version of an article published in Desalination. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Water desalination; Forward osmosis; Magnetic nanoparticles: Draw solutions; Osmotic pressure; Carbon nanofibres |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/S032797/1 EPSRC (Engineering and Physical Sciences Research Council) EP/J021156/1 EPSRC (Engineering and Physical Sciences Research Council) EP/K00512X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Jun 2022 13:07 |
Last Modified: | 21 Jun 2023 00:13 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.desal.2022.115903 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188024 |
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