Poly(phenyl sulfone) hollow fiber forward osmosis membrane for saline water desalination

AbstractForward osmosis (FO) process has been extensively considered as a potential technology that could minimize the problems of traditional water desalination processes. Finding an appropriate osmotic agent is an important concern in the FO process. For the first time, a nonionic surfactant-based draw solution was introduced using self-assemblies of Tween 80 and choline chloride. The addition of choline chloride to Tween 80 led to micelles formation with an average diameter of 11.03 nm. The 1H NMR spectra exhibited that all groups of Tween 80 were interacted with choline chloride by hydrogen bond and Van der Waals’ force. The influence of adding choline chloride to Tween 80 and the micellization on its osmotic activity was investigated. Despite the less activity of single components, the average water flux of 14.29 L m‒2 h‒1 was obtained using 0.15 M of Tween 80-choline chloride self-assembly as draw solution in the FO process with DI water feed solution. Moreover, various concentrations of NaCl aqueous solutions were examined as feed solution. This report proposed a possible preparation of nonionic surfactant-based draw solutions using choline chloride additive with enhanced osmotic activities that can establish an innovative field of study in water desalination by the FO process.

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Water desalination by forward osmosis: dynamic performance assessment and experimental validation using MgCl2 and NaCl as draw solutes

Computers & Chemical Engineering ◽

10.1016/j.compchemeng.2021.107313 ◽

2021 ◽

pp. 107313

Author(s):

Jaouad Eddouibi ◽

Souad Abderafi ◽

Sébastien Vaudreuil ◽

Tijani Bounahmidi

Keyword(s):

Performance Assessment ◽

Experimental Validation ◽

Dynamic Performance ◽

Forward Osmosis ◽

Water Desalination

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Submerged osmotic processes: Design and operation of hollow fiber forward osmosis modules

Desalination ◽

10.1016/j.desal.2021.115281 ◽

2021 ◽

Vol 518 ◽

pp. 115281

Author(s):

Gaetan Blandin ◽

Albert Galizia ◽

Hector Monclús ◽

Geoffroy Lesage ◽

Marc Héran ◽

...

Keyword(s):

Hollow Fiber ◽

Forward Osmosis

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Developing a HEC/CMC-Reduced Graphene Oxide Hydrogel Nanocomposite for Seawater Desalination

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.324.173 ◽

2021 ◽

Vol 324 ◽

pp. 173-178

Author(s):

Terence Tumolva ◽

Kenneth Carmelo Madamba ◽

Isabelle Gabrielle Nunag ◽

Vinz Gabriel Villanueva

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Forward Osmosis ◽

Antimicrobial Properties ◽

Water Desalination ◽

Small Scale ◽

Cellulose Derivatives ◽

Permeable Membrane ◽

Antimicrobial Efficiency ◽

Reduced Graphene

Current available methods for water desalination are energy intensive, expensive, and not feasible for small-scale applications. As an alternative, hydrogels may be utilized as a draw agent and semi-permeable membrane forward osmosis by acting as both to desalinate water. This study aims to synthesize and characterize hydrogels made from cellulose derivatives and reduced graphene oxide nanofillers in order to desalinate and remove microbes from seawater without requiring a large energy input. The hydrogels are formed by combining carboxymethyl cellulose, hydroxymethyl cellulose, reduced graphene oxide, and water to form a paste which is soaked in a crosslinking solution made of citric acid. Swelling, compression, antimicrobial efficiency and desalination efficiency tests were done. The hydrogel that obtained the highest values has a swelling ratio of 1,447%, compressive strength of 4 bar, desalination efficiency of 30%, and antimicrobial properties.

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