Forward osmosis–membrane distillation hybrid system for desalination using mixed trivalent draw solution

Nguyen, NC; Duong, HC; Nguyen, HT; Chen, SS; Le, HQ; Ngo, HH; Guo, W; Duong, CC; Le, NC; Bui, XT

Forward osmosis–membrane distillation hybrid system for desalination using mixed trivalent draw solution

Nguyen, NC Duong, HC Nguyen, HT Chen, SS Le, HQ Ngo, HH Guo, W

Duong, CC Le, NC Bui, XT

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2020, 603, pp. 118029-118029
Issue Date:: 2020-05-15

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Field	Value	Language
dc.contributor.author	Nguyen, NC
dc.contributor.author	Duong, HC
dc.contributor.author	Nguyen, HT
dc.contributor.author	Chen, SS
dc.contributor.author	Le, HQ
dc.contributor.author	Ngo, HH
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858
dc.contributor.author	Duong, CC
dc.contributor.author	Le, NC
dc.contributor.author	Bui, XT
dc.date.accessioned	2020-07-19T08:55:16Z
dc.date.available	2020-07-19T08:55:16Z
dc.date.issued	2020-05-15
dc.identifier.citation	Journal of Membrane Science, 2020, 603, pp. 118029-118029
dc.identifier.issn	0376-7388
dc.identifier.issn	1873-3123
dc.identifier.uri	http://hdl.handle.net/10453/141798
dc.description.abstract	© 2020 Elsevier B.V. Finding suitable draw solutions is still a major problem when developing FO technologies. This study represents the first time a mixed trivalent draw solution containing of EDTA–2Na and Na3PO4 was systemically studied for FO performance. The objective here was to achieve simultaneously low reverse salt flux and high water flux. The FO results showed that the mixed trivalent draw solution-based 0.3 M EDTA–2Na and 0.55 M Na3PO4 underwent higher water flux (Jw = 9.17 L/m2⋅h) than that of pure 0.85 M EDTA-2Na (Jw = 7.02 L/m2⋅h) due to its lower viscosity. Additionally, the specific reverse salt flux caused by mixing 0.3 M EDTA–2Na with 0.55 M Na3PO4 draw solution was only 0.053 g/L using DI water as the feed solution. Donnan equilibrium force and formed complexation of [EDTANa]3-, [HPO4Na]- with the FO membrane are believed to constitute the main mechanism for minimizing salt leakage from the mixed draw solution. Moreover, the FO desalination process utilizing the mixed trivalent draw solution achieved water fluxes of 6.12 L/m2⋅h with brackish water (TDS = 5000 mg/L) and 3.10 L/m2⋅h with seawater (TDS = 35,000 mg/L) as the feed solution. Lastly, diluted mixed trivalent draw solution following the FO process was effectively separated using the MD process with salt rejection >99.99% at a mild feed temperature of 55 °C.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Journal of Membrane Science
dc.relation.hasversion	Accepted manuscript version	en
dc.relation.isbasedon	10.1016/j.memsci.2020.118029
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Forward osmosis–membrane distillation hybrid system for desalination using mixed trivalent draw solution
dc.type	Journal Article
utslib.citation.volume	603
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2022-03-08T00:00:00+1000Z
dc.date.updated	2020-07-19T08:55:07Z
pubs.publication-status	Published
pubs.volume	603

Abstract:

© 2020 Elsevier B.V. Finding suitable draw solutions is still a major problem when developing FO technologies. This study represents the first time a mixed trivalent draw solution containing of EDTA–2Na and Na3PO4 was systemically studied for FO performance. The objective here was to achieve simultaneously low reverse salt flux and high water flux. The FO results showed that the mixed trivalent draw solution-based 0.3 M EDTA–2Na and 0.55 M Na3PO4 underwent higher water flux (Jw = 9.17 L/m2⋅h) than that of pure 0.85 M EDTA-2Na (Jw = 7.02 L/m2⋅h) due to its lower viscosity. Additionally, the specific reverse salt flux caused by mixing 0.3 M EDTA–2Na with 0.55 M Na3PO4 draw solution was only 0.053 g/L using DI water as the feed solution. Donnan equilibrium force and formed complexation of [EDTANa]3-, [HPO4Na]- with the FO membrane are believed to constitute the main mechanism for minimizing salt leakage from the mixed draw solution. Moreover, the FO desalination process utilizing the mixed trivalent draw solution achieved water fluxes of 6.12 L/m2⋅h with brackish water (TDS = 5000 mg/L) and 3.10 L/m2⋅h with seawater (TDS = 35,000 mg/L) as the feed solution. Lastly, diluted mixed trivalent draw solution following the FO process was effectively separated using the MD process with salt rejection >99.99% at a mild feed temperature of 55 °C.

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http://hdl.handle.net/10453/141798