Efficacy of carbon nanotube positioning in the polyethersulfone support layer on the performance of thin-film composite membrane for desalination

Son, Moon; Choi, Hyeon-gyu; Liu, Lei; Celik, Evrim; Park, Hosik; Choi, Heechul

doi:10.1016/j.cej.2014.12.108

Cited by 125 publications

(71 citation statements)

References 50 publications

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“…Using plasmamodified PVDF UF membranes, the TFC membranes synthesized by Kim et al [274] not only produced higher pure water permeability but also exhibited higher salt rejections compared to those of TFC membranes containing the conventional PSf substrate. Kim [279,280] prepared TFC membranes using polyethersulfone (PES) substrate blended with functionalized carbon nanotubes (fCNT). Results showed that fCNT incorporation increased the hydrophilicity, average pore width, total pore area, and porosity of the resulting TFC membranes.…”

Section: Substratesmentioning

confidence: 99%

Reverse osmosis desalination: A state-of-the-art review

et al. 2019

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Water scarcity is a grand challenge that has always stimulated research interests in finding effective means for pure water production. In this context, reverse osmosis (RO) is considered the leading and the most optimized membrane-based desalination process that is currently dominating the desalination market. In this review, various aspects of RO desalination are reviewed. Theories and models related to concentration polarization and membrane transport, as well as merits and drawbacks of these models in predicting polarization effects, are discussed. An updated review of studies related to membrane modules (plate and frame, tubular, spiral wound, and hollow fiber) and membrane characterization are provided. The review also discusses membrane cleaning and different pre-treatment technologies in place for RO desalination, such as feed-water pre-treatment and biocides. RO pre-treatment technologies, which include conventional (e.g., coagulationflocculation, media filtration, disinfection, scale inhibition) and non-conventional (e.g., MF, UF, and NF) are reviewed and their relative attributes are compared. As per the available literature, UF, MF and coagulation-flocculation are considered the most widely used pre-treatment technologies. In addition, this review discusses membrane fouling, which represents a serious challenge in RO processes due to its significant contribution to energy requirements and process economy (e.g., flux decline, permeate quality, membrane lifespan, increased feed pressure, increased pre-treatment and membrane maintenance cost). Different membrane fouling types, such as colloidal, organic, inorganic, and biological fouling, are addressed in this review. Principles of RO process design and the embedded economic and energy considerations are discussed. In general, cost of water desalination has dropped to values that made it a viable option, comparable even to conventional water treatment methods. Finally, an overview of hybrid RO desalination processes and the current challenges faced by RO desalination processes are presented and discussed.

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Section: Substratesmentioning

confidence: 99%

Reverse osmosis desalination: A state-of-the-art review

et al. 2019

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“…Membrane separation technology has been widely accepted as a promising route to offer sustainable fresh water in a more economical and green process. At present, CNTs are interestingly investigated and have attracted significant growing attentions due to their properties to enhance the efficiency and capability of currently available membrane processes such as reverse osmosis (RO), nanofiltration (NF) and membrane distillation (MD) [88,89,90,91,92,93]. …”

Section: Water Treatment Applicationsmentioning

confidence: 99%

“…Son et al created a novel architecture to produce a better performance thin-film composite (TFC) membrane for seawater reverse osmosis (SWRO) and brackish water reverse osmosis (BWRO) by immobilizing functionalized CNTs in the porous support layer [88]. Beneficial for application, the new membranes showed enhanced water permeability due to their increased hydrophilicity and enhanced pore properties of the support layer without sacrificing NaCl rejection as compared to that of the bare TFC membranes.…”

Section: Water Treatment Applicationsmentioning

confidence: 99%

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

et al. 2017

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Membrane separation technology is widely explored for various applications, such as water desalination and wastewater treatment, which can alleviate the global issue of fresh water scarcity. Specifically, carbon nanotubes (CNTs)-based composite membranes are increasingly of interest due to the combined merits of CNTs and membrane separation, offering enhanced membrane properties. This article first briefly discusses fabrication and growth mechanisms, characterization and functionalization techniques of CNTs, and then reviews the fabrication methods for CNTs-based composite membranes in detail. The applications of CNTs-based composite membranes in water treatment are comprehensively reviewed, including seawater or brine desalination, oil-water separation, removal of heavy metal ions and emerging pollutants as well as membrane separation coupled with assistant techniques. Furthermore, the future direction and perspective for CNTs-based composite membranes are also briefly outlined.

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“…Polysulfone (PSf) and polyethersulfone (PES) are the most widely used polymers for the preparation of the support layer of PA-TFC RO membranes (Mohan and Kullová, 2013;Seman et al, 2010;Son et al, 2015;Azizi Namaghi et al, 2015). Although these polymers show good thermal stability and tolerance to a wide range of pH values, they have relatively hydrophobic surfaces and low chemical stability in aromatic hydrocarbons (Kim et al, 2009;Ahmad et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, some studies have been carried out to overcome the above mentioned limitations. Accordingly, the support layer of TFC membranes was modified via inserting modifiers in the polymer matrix (Ghosh and Hoek, 2009;Son et al, 2015;Mahdavi and Hosseinzadeh, 2015;Sotto et al, 2012;Arena et al, 2011;Yan et al, 2016). Furthermore, altering the polymer material was suggested for preparation of the support layer in the literature, which will be summarized as follows.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Thin-Film Composite Reverse Osmosis Membrane on a Novel Aminosilane-Modified Polyvinyl Chloride Support

Iranizadeh

Chenar

Mahboub

et al. 2019

Braz. J. Chem. Eng.

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Herein, the influence of pure and modified polyvinyl chloride (PVC) support layers on the performance of thin-film composite (TFC) membranes was investigated in water desalination. Accordingly, the PVC support was modified using (3-Aminopropyl) triethoxysilane (APTES) through bulk modification. The supports were synthesized at different doses of APTES (0-6 wt%) and characterized with various analytical techniques. The results showed that APTES affected considerably both the morphology and surface properties of the support layer. Afterwards, the polyamide (PA) layer was formed via an identical interfacial polymerization (IP). The separation experiments showed that modification of the support improved the performance of the TFC membranes, which stems from the improvement in the degree of cross-linking of the PVC structure. At an appropriate condition, permeate fluxes were 0.89 L.m-2 .h-1 .bar-1 and 2.70 L.m-2 .h-1 .bar-1 for TFC membranes with pure and modified PVC support layers, respectively. Interestingly, there were no significant changes in salt rejection of the prepared membranes.

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Efficacy of carbon nanotube positioning in the polyethersulfone support layer on the performance of thin-film composite membrane for desalination

Cited by 125 publications

References 50 publications

Reverse osmosis desalination: A state-of-the-art review

Reverse osmosis desalination: A state-of-the-art review

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

Preparation and Characterization of Thin-Film Composite Reverse Osmosis Membrane on a Novel Aminosilane-Modified Polyvinyl Chloride Support

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