Superior cross-linking assisted layer by layer modification of forward osmosis membranes for brackish water desalination

Suwaileh, Wafa; Johnson, Daniel J.; Khodabakhshi, Saeed; Hilal, Nidal

doi:10.1016/j.desal.2019.04.009

Cited by 29 publications

(12 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modification by polyelectrolyte is a promising approach for development of antifouling membranes due to polyelectrolyte’s high hydration ability, possibility to tune surface charge and versatility of chemistry, structure and modification techniques which can be implemented [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ]. Moreover, modification by polyelectrolytes is a flexible instrument for design of thin film composite membranes for microfiltration [ 29 ], ultrafiltration (UF) [ 30 , 31 , 32 , 33 , 34 , 35 , 36 ], nanofiltration (NF) [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ,…”

Section: Introductionmentioning

confidence: 99%

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

et al. 2020

View full text Add to dashboard Cite

Surface modification of polysulfone ultrafiltration membranes was performed via addition of an anionic polymer flocculant based on acrylamide and sodium acrylate (PASA) to the coagulation bath upon membrane preparation by non-solvent induced phase separation (NIPS). The effect of PASA concentration in the coagulant at different coagulation bath temperatures on membrane formation time, membrane structure, surface roughness, hydrophilic-hydrophobic balance of the skin layer, surface charge, as well as separation and antifouling performance was studied. Scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, contact angle and zeta potential measurements were utilized for membrane characterization. Membrane barrier and antifouling properties were evaluated in ultrafiltration of model solutions containing human serum albumin and humic acids as well as with real surface water. PASA addition was found to affect the kinetics of phase separation leading to delayed demixing mechanism of phase separation due to the substantial increase of coagulant viscosity, which is proved by a large increase of membrane formation time. Denser and thicker skin layer is formed and formation of macrovoids in membrane matrix is suppressed. FTIR analysis confirms the immobilization of PASA macromolecules into the membrane skin layer, which yields improvement of hydrophilicity and change of zeta potential. Modified membrane demonstrated better separation and antifouling performance in the ultrafiltration of humic acid solution and surface water compared to the reference membrane.

show abstract

Section: Introductionmentioning

confidence: 99%

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[4,[7][8][9][10][11][12][13][14] Among which water purification and desalination are gaining a lot of interest due to the recent lack of drinkable clean water supplies across the globe. Other competitive technologies for the production of freshwater, such as solid-liquid extraction, [13,15] electrochemical analysis [16,17] membrane-based separation, [18,19] etc. have many drawbacks, including high energy usage, possible environmental emissions, high infrastructure capital costs, etc.However, the efficiency of the traditional solar-steam generation method is below 24%, even with a high optical concentration ratio.…”

mentioning

confidence: 99%

Solar Driven Interfacial Steam Generation Derived from Biodegradable Luffa Sponge

Saleque

Ahmed

et al. 2021

Advanced Sustainable Systems

View full text Add to dashboard Cite

energy sector's two-superseding obstacles on the road to a sustainable future. [1][2][3] As the proven reserves of fossil fuels decrease, renewable energy sources have been sought in high demand, of which solar power is the most promising and potentially limitless source of energy in the foreseeable future. The energy from the sun to the earth is as high as 3 × 10 24 Jules per year, just 0.1% of the total solar resource would be sufficient to satisfy the annual worldwide energy demand. At present, solarsteam generation, which particularly refers to solar vapor under 100 °C, is considered to be one of the most promising sectors among other solar energy harvesting technologies owing to its potential applications in modern power plants, chemical plants, liquid-liquid phase separation, water purification and desalination, wastewater treatment, and many others. [4,[7][8][9][10][11][12][13][14] Among which water purification and desalination are gaining a lot of interest due to the recent lack of drinkable clean water supplies across the globe. Other competitive technologies for the production of freshwater, such as solid-liquid extraction, [13,15] electrochemical analysis [16,17] membrane-based separation, [18,19] etc. have many drawbacks, including high energy usage, possible environmental emissions, high infrastructure capital costs, etc.However, the efficiency of the traditional solar-steam generation method is below 24%, even with a high optical concentration ratio. [20] The traditional approach involves water evaporation by converting solar radiation directly to heat for steam generation commonly by using bulk metals. These bulk metals are inefficient in absorbing the solar spectrum and transferring heat through bulk water. As a consequence, its performance is limited by localized heat generation and transfer losses. [12,20,21] By contrast, interfacial solar vapor generation (ISVG) can localize the heat on the evaporation surface and, rather than the whole water, selectively heating the evaporation portion to minimize heat transfer to the water and significantly increase the solar evaporation efficiency. Therefore, ISVG has emerged as a novel concept for the solar steam generation with higher efficiency, attributes to the recent developments in nanoscale structural design with efficient photon and thermal management known as photothermal conversion materials. [1,[22][23][24][25][26] The photothermal conversion materials should have strong solar absorption and low thermal conductivity to achieve greater efficiency. [6,12] Moreover, it is also desirable to have superior hydrophilicity and porosity for fast water and A chemically treated luffa sponge (LS) derived from the ripe fruit of the Luffa cylindrica (LC) plant is investigated as an efficient solar photothermal conversion material for water purification applications for the very first time. Hydrophilicity and solar absorbance of the LS are enhanced by dopamine treatment and candle soot surface coating. The fabricated surface modified LS (SM-LS) leads to a sup...

show abstract

“…Where Ce is the salt concentration in the FS (g L −1 ) and C0 is the initial salt concentration in the FS In our earlier research we developed a mathematical method which considers the water flux and reverse solute flux values to determine the optimum water permeability coefficient (A) and solute permeability coefficient (B), which are the crucial parameters in FO system [30]. This model involves using second-order differential equation to calculate the optimum value of A and B.…”

Section: Membrane Intrinsic Parameters In Fo Systemmentioning

confidence: 99%

Development of forward osmosis membranes modified by cross-linked layer by layer assembly for brackish water desalination

Suwaileh

Johnson

Khodabakhshi

et al. 2019

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

Membranes having high water flux and minimum reverse solute flux at low operating pressures are the ideal membranes for the forward osmosis (FO) process. In this work, we report the use of a LbL surface modification strategy to fabricate a novel positively charged FO membranes. The main purpose of this work was to fabricate an effective selective layer onto a commercial PES ultrafiltration membrane, which functioned as a support layer, to provide the best performance for treatment of brackish water by FO. The new membranes containing a mixing ratio of 0.1 MPDADMAC: 0.001 MCMCNa in the polyelectrolyte complex exhibited the best performance in terms of minimum reverse solute flux and acceptable water flux as compared to that for membranes containing a mixing ratio of 0.1 MPDADMAC: 0.01 MCMCNa. The improved performance and physicochemical properties of the new membranes were explored by various analytical techniques and were compared to the pristine membrane. Firstly, structural characterization revealed that the new selective layer was homogenous, uniform and strongly adhered to the substrate resulting in excellent water permeability and acceptable reverse solute flux. Secondly, 2 it was found that the optimal curing temperature was 60 O C for 4 hours that contributed to enhanced membrane performance. Lastly, the developed ranking protocol was adopted to optimize the membrane performance in terms of the water permeability coefficient (A) and solute permeability coefficient (B). According to this optimization procedure, the best performing membrane was membrane coated 2.5 bilayers which had water permeability and solute permeability coefficients of 23.1 L m −2 h −1 bar-1 and 1.54 L m −2 h −1 respectively.

show abstract

Superior cross-linking assisted layer by layer modification of forward osmosis membranes for brackish water desalination

Abstract: Superior cross-linking assisted layer by layer modification of forward osmosis membranes for brackish water desalination. Desalination, 463, 1-12.

Cited by 29 publications

References 31 publications

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

Solar Driven Interfacial Steam Generation Derived from Biodegradable Luffa Sponge

Development of forward osmosis membranes modified by cross-linked layer by layer assembly for brackish water desalination

Contact Info

Product

Resources

About