Investigation of raw and oxidized multiwalled carbon nanotubes in fabrication of reverse osmosis polyamide membranes for improvement in desalination and antifouling properties

Farahbakhsh, Javad; Delnavaz, Mohammad; Vatanpour, Vahid

doi:10.1016/j.desal.2017.01.031

Cited by 139 publications

(35 citation statements)

References 32 publications

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“…CNTs have a great potential in increasing membrane surface hydrophilicity and reduce membrane fouling (Vatanpour and Zoqi, 2017). Farahbaksh et al (Farahbaksh et al, 2017) synthesized a new kind of RO membrane by incorporating CNTs with different concentrations and they found that compared with bare RO membranes, CNTs-embedded RO membranes demonstrated better antifouling performance. Graphene oxide, a cheaper but more efficient graphene source material, is gaining more attention in recent years.…”

Section: Novel Membrane Materialsmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

750

362

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Reverse osmosis (RO) membrane technology is one of the most important technologies for water treatment. However, membrane fouling is an inevitable issue. Membrane fouling leads to higher operating pressure, flux decline, frequent chemical cleaning and shorter membrane life. This paper reviews membrane fouling types and fouling control strategies, with a focus on the latest developments. The fundamentals of fouling are discussed in detail, including biofouling, organic fouling, inorganic fouling and colloidal fouling. Furthermore, fouling mitigation technologies are also discussed comprehensively. Pretreatment is widely used in practice to reduce the burden for the following RO operation while real time monitoring of RO has the advantage and potential of providing support for effective and efficient cleaning. Surface modification could slow down membrane fouling by changing surface properties such as surface smoothness and hydrophilicity, while novel membrane materials and synthesis processes build a promising future for the next generation of RO membranes with big advancements in fouling resistance. Especially in this review paper, statistical analysis is conducted where appropriate to reveal the research interests in RO fouling and control.Graphic Abstract

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Section: Novel Membrane Materialsmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

750

362

View full text Add to dashboard Cite

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Section: Fouling Resistancementioning

confidence: 99%

“…Aside from anti-biofouling properties of CNTs, many studies have been carried out for anti-organic fouling of CNT membranes [98]. The pristine or oxidized MWCNT membranes at different concentrations show better antifouling properties compare to unloaded CNT membranes in 24 h test with bovine serum albumin (BSA) solution [98]. The primary cause is that carboxylated MWCNTs that are dispersedly deposited on the surface of the membrane are used to reduce BSA fouling by forming polymer brushes and hydrodynamic resistance [98].…”

Section: Fouling Resistancementioning

confidence: 99%

“…The pristine or oxidized MWCNT membranes at different concentrations show better antifouling properties compare to unloaded CNT membranes in 24 h test with bovine serum albumin (BSA) solution [98]. The primary cause is that carboxylated MWCNTs that are dispersedly deposited on the surface of the membrane are used to reduce BSA fouling by forming polymer brushes and hydrodynamic resistance [98]. This kind of antifouling CNT membranes can be simply prepared by grafting of a hydrophilic acrylic acid monomer and carboxylated MWCNTs on commercial RO membrane [98,113].…”

Section: Fouling Resistancementioning

confidence: 99%

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Recent Advances in Applications of Carbon Nanotubes for Desalination: A Review

et al. 2020

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As a sustainable, cost-effective and energy-efficient method, membranes are becoming a progressively vital technique to solve the problem of the scarcity of freshwater resources. With these critical advantages, carbon nanotubes (CNTs) have great potential for membrane desalination given their high aspect ratio, large surface area, high mechanical strength and chemical robustness. In recent years, the CNT membrane field has progressed enormously with applications in water desalination. The latest theoretical and experimental developments on the desalination of CNT membranes, including vertically aligned CNT (VACNT) membranes, composited CNT membranes, and their applications are timely and comprehensively reviewed in this manuscript. The mechanisms and effects of CNT membranes used in water desalination where they offer the advantages are also examined. Finally, a summary and outlook are further put forward on the scientific opportunities and major technological challenges in this field.

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“…Recently, the application of nanomaterials in preparation of mixed-matrix PA TFC membranes has provided a new perspective to improve performance of RO membranes. 17 Some studies have demonstrated that PA TFC membranes incorporated with nanoparticles, e.g., SiO 2 , 18,19 silver nanoparticles, 20,21 TiO 2 , 22 zeolite 23 and carbon nanotubes (CNTs), [24][25][26][27][28] show increased water ux, salt rejection and/or excellent antifouling property due to improvement in surface properties of PA separation layer. Among these nanomaterials, CNTs have attracted much attention in fabricating ltration membranes because of their intrinsic 1-dimensional pore structure for superior transport capability.…”

Section: Introductionmentioning

confidence: 99%