Computing the effective diffusion coefficient of solutes in a multi-salts solutions during forward osmosis (FO) membrane filtration: Experiments and mathematical modelling

Liyanaarachchi, S; Muthukumaran, S; Kaiser, J; Rogers, P; Shu, L; Shon, HK; Jegatheesan, V

Computing the effective diffusion coefficient of solutes in a multi-salts solutions during forward osmosis (FO) membrane filtration: Experiments and mathematical modelling

Liyanaarachchi, S Muthukumaran, S Kaiser, J Rogers, P Shu, L Shon, HK

Jegatheesan, V

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Publication Type:: Journal Article
Citation:: Journal of Environmental Management, 2018, 214 pp. 215 - 223
Issue Date:: 2018-05-15

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Field	Value	Language
dc.contributor.author	Liyanaarachchi, S	en_US
dc.contributor.author	Muthukumaran, S	en_US
dc.contributor.author	Kaiser, J	en_US
dc.contributor.author	Rogers, P	en_US
dc.contributor.author	Shu, L	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Jegatheesan, V	en_US
dc.date.available	2020-05-27T19:05:36Z
dc.date.issued	2018-05-15	en_US
dc.identifier.citation	Journal of Environmental Management, 2018, 214 pp. 215 - 223	en_US
dc.identifier.issn	0301-4797	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131284
dc.description.abstract	© 2018 Elsevier Ltd Diffusion coefficient of solutes through a porous membrane media is different from diffusion coefficient through a free homogenous media. Porosity, tortuosity and the thickness of the membrane significantly affect the diffusion through a specific thickness of a membrane and therefore it is termed as effective diffusion coefficient (Deff) which is lower than the actual diffusion coefficient, D. The Deff of single or dual solutes through a porous membrane layer are well documented but not for multiple salts. Therefore, in this study, single, dual and multiple salt mixtures were passed through a flat sheet cellulose triacetate Forward Osmosis (FO) membrane to obtain a semi-empirical relationship with the Deff and its water flux. This will allow computing the structural coefficient of FO membranes. Research community have spent tremendous efforts in membrane modification to reduce the structural coefficient to improve FO process efficiency. Our finding suggests that optimising the draw solution chemistry can achieve this goal.	en_US
dc.relation.ispartof	Journal of Environmental Management	en_US
dc.relation.isbasedon	10.1016/j.jenvman.2018.03.002	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Organic Chemicals	en_US
dc.subject.mesh	Membranes, Artificial	en_US
dc.subject.mesh	Solutions	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Osmosis	en_US
dc.title	Computing the effective diffusion coefficient of solutes in a multi-salts solutions during forward osmosis (FO) membrane filtration: Experiments and mathematical modelling	en_US
dc.type	Journal Article
utslib.citation.volume	214	en_US
utslib.for	090508 Water Quality Engineering	en_US
utslib.for	0912 Materials 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	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	214	en_US

Abstract:

© 2018 Elsevier Ltd Diffusion coefficient of solutes through a porous membrane media is different from diffusion coefficient through a free homogenous media. Porosity, tortuosity and the thickness of the membrane significantly affect the diffusion through a specific thickness of a membrane and therefore it is termed as effective diffusion coefficient (Deff) which is lower than the actual diffusion coefficient, D. The Deff of single or dual solutes through a porous membrane layer are well documented but not for multiple salts. Therefore, in this study, single, dual and multiple salt mixtures were passed through a flat sheet cellulose triacetate Forward Osmosis (FO) membrane to obtain a semi-empirical relationship with the Deff and its water flux. This will allow computing the structural coefficient of FO membranes. Research community have spent tremendous efforts in membrane modification to reduce the structural coefficient to improve FO process efficiency. Our finding suggests that optimising the draw solution chemistry can achieve this goal.

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http://hdl.handle.net/10453/131284