Polymers for Membrane Filtration in Water Purification

Giwa, Adewale; Ahmed, Menatalla; Hasan, Shadi W.

doi:10.1007/978-3-030-00743-0_8

Cited by 22 publications

(10 citation statements)

References 112 publications

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“…Recently, polymer membranes have started receiving attention as a scalable and cheap alternative for carrying out ionic separation processes. , Polymer membranes have become an integral part of the modern world owing to their usage in applications such as water purification, − reverse osmosis, , microfiltration, , electrodialysis, , and so forth. Nevertheless, development of polymer membranes for ion selective applications is still in its nascent stages since membranes have been historically utilized for water purification purposes, that is, mainly ion–water separation and not ion–ion separation.…”

Section: Introductionmentioning

confidence: 99%

Impact of Cation–Ligand Interactions on the Permselectivity of Ligand-Functionalized Polymer Membranes in Single and Mixed Salt Systems

et al. 2022

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We conduct molecular dynamics simulations to study the effects of cation–ligand interactions on salt permeation in ligand-functionalized polymer membranes. Our results indicate that salt partitioning into the membrane increases while the salt diffusivity decreases with enhancement in the cation–ligand interaction strength. Moreover, the increase in partitioning dominates the decline in salt diffusivity, leading to a net enhancement in salt permeation at higher cation–ligand interaction strengths. Equimolar binary mixed salt systems (having a common anion) generally exhibit much more selective partitioning of salts into the membrane as compared to their single salt counterparts. However, single salt systems exhibit much higher ratio of salt diffusivities than their mixed salt analogues. The permselectivity data closely resemble the trends in selective partitioning for both single and mixed salt systems, indicating that salt diffusivity selectivity plays a weaker role than salt partitioning selectivity in dictating the selective permeation of salts across the membrane.

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Section: Introductionmentioning

confidence: 99%

Impact of Cation–Ligand Interactions on the Permselectivity of Ligand-Functionalized Polymer Membranes in Single and Mixed Salt Systems

et al. 2022

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“…The most commonly polymer used in the fabrication of ultrafiltration membrane is polysulfone. The structure of this polymer contains sulfone group (SO2) and an aromatic constituent (isopropylidene or ether groups) that resist to oxidation and withstand toward the heat [9,10]. It is a thermoplastic polymer and are naturally hydrophobic which can lead to decline water flux during operation owing to the deposition of organic substances that promote adhesion and development of microbes' growth on the membrane surface [10].…”

Section: Introductionmentioning

confidence: 99%

Characterization Effect of Polysulfone Membranes with Different Molecular Weight of Polyethylene Glycol Additives

Ismail

Azmi²,

Shoparwe

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Nowadays, membrane technology has gaining popularity in biotechnology, food processing, water treatment, pharmaceutical and semiconductor industries. It been reported as a potential technique for separation due to their low-cost process, does not used many chemical and energy sufficient. However, there is less study about polysulfone (PSF) used as a polymer based in membrane filtration with polyethylene glycol (PEG) as additives in different molecular weight (Mw: 400, 600, 1500, and 4000 Da). Therefore, this study has been conducted to investigate the effect of different molecular weight of PEG in terms of thermal stability, hydrophilicity, and porosity. For methodology, PSF polymer was fabricated with PEG and Dimethylacetamide (DMAc) act as solvent via wet phase inversion method. The physical, thermal and chemical characterization were analysed using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and laboratory testing of contact angle, water uptake, and porosity. The result showed improvement in fabricated membranes hydrophilicity than pure membrane. PEG with high molecular weight demonstrated the higher membrane hydrophilicity, good thermal stability (38.40%), contact angle (54°), higher water uptake (385.23%), and higher porosity (82.72%). As conclusion, PSF with addition of the high molecular weight of PEG (PEG4000) can improve the performance of membrane filtration.

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“…Conventional polymeric membranes including cellulose acetate (CA), polyamide membranes (PA), and polysulfone (PSF), polyvinylidene fluoride (PVDF) earlier flourished remarkably in this application. 20 However, these membranes are contravened by their fouling nature. Fouling and scaling played a significant drawback in their transport mechanism by increasing more mass transfer resistance, also declining the flux, resulting in the increase in the membrane operation cost because of the membrane cleaning requirements, membrane periodic replacement, and higher energy input.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure Dependent Water Transport in Membranes Based on Two-Dimensional Materials

Bakshi

Bustamante

Sui

et al. 2021

Ind. Eng. Chem. Res.

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The upsurge in population and industrialization has instigated the demand in improvement in the existing water purification systems. Numerous organic, and later inorganic materials, have showcased huge potential in different membrane separation processes. Recently, a novel range of two-dimensional (2D) materials possessing atomic thickness, high robustness, excellent mechanical stability, and even great fouling resistance have shown their appealing potential as membrane materials in this respect. The high aspect ratios of 2D materials enable the feasible control of membrane assembled structures. The membrane structure of 2D materials plays a crucial role in separation performance. Regarding the molecular transport pathway, the assembled structure is categorized into laminates and in-plane pores here. From this aspect, this review discusses the most recently progress of 2D materials membranes, including graphene-based materials, MXenes, transition metal dichalcogenides, metal organic frameworks, covalent organic frameworks, and boron nitride, in the field of water purification. According to their membrane assembled structures, the design strategies with separation mechanism and separation performance have been reviewed. Lastly, challenges and futuristic upgrades to enhance their membrane operation are discussed accordingly. This review provides a new perspective of 2D material assemblies on membrane design for advancing separation performance in water purification.

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Polymers for Membrane Filtration in Water Purification

Cited by 22 publications

References 112 publications

Impact of Cation–Ligand Interactions on the Permselectivity of Ligand-Functionalized Polymer Membranes in Single and Mixed Salt Systems

Impact of Cation–Ligand Interactions on the Permselectivity of Ligand-Functionalized Polymer Membranes in Single and Mixed Salt Systems

Characterization Effect of Polysulfone Membranes with Different Molecular Weight of Polyethylene Glycol Additives

Structure Dependent Water Transport in Membranes Based on Two-Dimensional Materials

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