Direct preparation of dialysate from tap water via osmotic dilution

Zhao, S; Dou, P; Song, J; Nghiem, LD; Li, XM; He, T

Direct preparation of dialysate from tap water via osmotic dilution

Zhao, S Dou, P Song, J Nghiem, LD Li, XM He, T

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2020, 598, pp. 117659-117659
Issue Date:: 2020-03-15

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Field	Value	Language
dc.contributor.author	Zhao, S
dc.contributor.author	Dou, P
dc.contributor.author	Song, J
dc.contributor.author	Nghiem, LD
dc.contributor.author	Li, XM
dc.contributor.author	He, T
dc.date.accessioned	2020-11-30T20:22:42Z
dc.date.available	2020-11-30T20:22:42Z
dc.date.issued	2020-03-15
dc.identifier.citation	Journal of Membrane Science, 2020, 598, pp. 117659-117659
dc.identifier.issn	0376-7388
dc.identifier.issn	1873-3123
dc.identifier.uri	http://hdl.handle.net/10453/144466
dc.description.abstract	© 2019 Elsevier B.V. Preparation of dialysate for hemodialysis (or dialysis) requires dilution of the dialysis concentrate with purified water. Present practice contains two steps: first to purify water, and then water is transported to clinic to mix with the dialysate concentrate before treatment. As a new forward osmosis dialysis hybrid process, based on osmotic dilution, is evaluated for decentralized health care systems. A commercial cellulose triacetate (CTA) and a tailor-made thin film composite (TFC) polyamide FO membranes were examined. The rejection of salts in tap water by the FO membranes was investigated, and the real rejections of various ions as a function of permeate flux were well described by using a irreversible thermodynamic model. The hollow fiber TFC FO membrane showed higher water flux and lower reverse salt flux than the CTA membrane in diluting process. Both steric hindrance and electrostatic repulsion explained the rejection behavior of the membranes to the ions. Higher rejections of anions were obtained than cations, which was attributed to the anions selection characteristics of the membranes. No obvious foulings or scalings were observed in a relatively long time osmotic dilution process over 5 repeated cycles. The stable, high efficient osmotic dilution process in hemodialysis holds a strong promise in reducing the consumption of purified water or even eliminating the water purification step. This work provides a potentially new platform hemodialysis which can be portable and implementable away from major hospitals and major clinics.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Journal of Membrane Science
dc.relation.isbasedon	10.1016/j.memsci.2019.117659
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Direct preparation of dialysate from tap water via osmotic dilution
dc.type	Journal Article
utslib.citation.volume	598
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	closed_access	*
dc.date.updated	2020-11-30T20:22:38Z
pubs.publication-status	Published
pubs.volume	598

Abstract:

© 2019 Elsevier B.V. Preparation of dialysate for hemodialysis (or dialysis) requires dilution of the dialysis concentrate with purified water. Present practice contains two steps: first to purify water, and then water is transported to clinic to mix with the dialysate concentrate before treatment. As a new forward osmosis dialysis hybrid process, based on osmotic dilution, is evaluated for decentralized health care systems. A commercial cellulose triacetate (CTA) and a tailor-made thin film composite (TFC) polyamide FO membranes were examined. The rejection of salts in tap water by the FO membranes was investigated, and the real rejections of various ions as a function of permeate flux were well described by using a irreversible thermodynamic model. The hollow fiber TFC FO membrane showed higher water flux and lower reverse salt flux than the CTA membrane in diluting process. Both steric hindrance and electrostatic repulsion explained the rejection behavior of the membranes to the ions. Higher rejections of anions were obtained than cations, which was attributed to the anions selection characteristics of the membranes. No obvious foulings or scalings were observed in a relatively long time osmotic dilution process over 5 repeated cycles. The stable, high efficient osmotic dilution process in hemodialysis holds a strong promise in reducing the consumption of purified water or even eliminating the water purification step. This work provides a potentially new platform hemodialysis which can be portable and implementable away from major hospitals and major clinics.

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http://hdl.handle.net/10453/144466