The potential of monocationic imidazolium-, phosphonium-, and ammonium-based hydrophilic ionic liquids as draw solutes for forward osmosis

Zeweldi, HG; Limjuco, LA; Bendoy, AP; Kim, HS; Park, MJ; Shon, HK; Johnson, EM; Lee, H; Chung, WJ; Nisola, GM

The potential of monocationic imidazolium-, phosphonium-, and ammonium-based hydrophilic ionic liquids as draw solutes for forward osmosis

Zeweldi, HG Limjuco, LA Bendoy, AP Kim, HS Park, MJ Shon, HK

Johnson, EM Lee, H Chung, WJ Nisola, GM

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Publication Type:: Journal Article
Citation:: Desalination, 2018, 444 pp. 94 - 106
Issue Date:: 2018-10-15

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Field	Value	Language
dc.contributor.author	Zeweldi, HG	en_US
dc.contributor.author	Limjuco, LA	en_US
dc.contributor.author	Bendoy, AP	en_US
dc.contributor.author	Kim, HS	en_US
dc.contributor.author	Park, MJ	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Johnson, EM	en_US
dc.contributor.author	Lee, H	en_US
dc.contributor.author	Chung, WJ	en_US
dc.contributor.author	Nisola, GM	en_US
dc.date.issued	2018-10-15	en_US
dc.identifier.citation	Desalination, 2018, 444 pp. 94 - 106	en_US
dc.identifier.issn	0011-9164	en_US
dc.identifier.uri	http://hdl.handle.net/10453/127262
dc.description.abstract	© 2018 The widespread implementation of forward osmosis (FO) is highly constrained by the limited availability of suitable draw solutes (DS). Herein, monocationic hydrophilic ionic liquids (ILs) were probed as FO DS. Water (Jv), reverse solute (Js), and specific reverse solute (Js/Jv) fluxes were determined and correlated with IL properties: Van't Hoff factor (i), ionic strength, hydrated ionic radius (rH), diffusivity and membrane affinity. Most of the ILs have comparable Jv with the benchmark draw solute NaCl but their Js were significantly lower, particularly under PRO mode. Their remarkably lower Js/Jv (i.e. <0.010 ± 7.45 × 10−4 mol L−1) than NaCl (0.021 ± 0.003 mol L−1) validates their potential use as FO DS. Tetraethylammonium bromide ([N2222]Br) is the most suitable IL DS due to its high π high ionic strength, small rH, least membrane permeability (B = 0.14 L m−2 h−1) and lowest Js/Jv = 0.004 ± 5.53 × 10−4 mol L−1. Moreover, [N2222]Br effectively desalinated seawater (0.6 M NaCl). It is thermally stable and can be effectively regenerated through direct contact membrane distillation. The final permeated water had only trace [N2222]Br, which is safe for consumption as confirmed by in vitro toxicity tests. These results demonstrate that certain ILs like [N2222]Br can be identified as suitable draw solutes for FO desalination process.	en_US
dc.relation	http://purl.org/au-research/grants/arc/IH170100009
dc.relation.ispartof	Desalination	en_US
dc.relation.isbasedon	10.1016/j.desal.2018.07.017	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	The potential of monocationic imidazolium-, phosphonium-, and ammonium-based hydrophilic ionic liquids as draw solutes for forward osmosis	en_US
dc.type	Journal Article
utslib.citation.volume	444	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0301 Analytical Chemistry	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
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/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	444	en_US

Abstract:

© 2018 The widespread implementation of forward osmosis (FO) is highly constrained by the limited availability of suitable draw solutes (DS). Herein, monocationic hydrophilic ionic liquids (ILs) were probed as FO DS. Water (Jv), reverse solute (Js), and specific reverse solute (Js/Jv) fluxes were determined and correlated with IL properties: Van't Hoff factor (i), ionic strength, hydrated ionic radius (rH), diffusivity and membrane affinity. Most of the ILs have comparable Jv with the benchmark draw solute NaCl but their Js were significantly lower, particularly under PRO mode. Their remarkably lower Js/Jv (i.e. <0.010 ± 7.45 × 10−4 mol L−1) than NaCl (0.021 ± 0.003 mol L−1) validates their potential use as FO DS. Tetraethylammonium bromide ([N2222]Br) is the most suitable IL DS due to its high π high ionic strength, small rH, least membrane permeability (B = 0.14 L m−2 h−1) and lowest Js/Jv = 0.004 ± 5.53 × 10−4 mol L−1. Moreover, [N2222]Br effectively desalinated seawater (0.6 M NaCl). It is thermally stable and can be effectively regenerated through direct contact membrane distillation. The final permeated water had only trace [N2222]Br, which is safe for consumption as confirmed by in vitro toxicity tests. These results demonstrate that certain ILs like [N2222]Br can be identified as suitable draw solutes for FO desalination process.

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http://hdl.handle.net/10453/127262