New insights of nanomaterials usage toward superhydrophobic membranes for water desalination via membrane distillation: A review

Gontarek‐Castro, Emilia; Castro‐Muñoz, Roberto; Lieder, Marek

doi:10.1080/10643389.2021.1877032

Cited by 73 publications

(21 citation statements)

References 159 publications

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“…The MD membranes should have high permeability, high hydrophobicity, low pore wettability, and high salt rejection. MD can be used in four different configurations: direct contact membrane distillation (DCMD), air gap membrane distillation (AGMD), sweep gas membrane distillation (SGMD), and vacuum membrane distillation (VMD) [51]. Polyvinylidene fluoride (PVDF) is the most commonly utilized membrane for membrane distillation due to its high hydrophobicity, low surface energy, high thermal stability, and mechanical strength.…”

Section: Applications Of Nanofibers For Water Treatmentmentioning

confidence: 99%

“…Another approach to increase the membrane anti-wettability is the fabrication of a superhydrophobic nanofiber membrane which can be achieved by surface fluorination [61], PTFE incorporation [62], CNT coating [63], polydimethylsiloxane incorporation [64], and graphene oxide (GO) incorporation [65]. Superhydrophobic membranes have multilevel surface roughness and a small liquid-solid contact area, which provides the benefits of lower membrane fouling [51].…”

Section: Applications Of Nanofibers For Water Treatmentmentioning

confidence: 99%

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Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

et al. 2021

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In the past few decades, the role of nanotechnology has expanded into environmental remediation applications. In this regard, nanofibers have been reported for various applications in water treatment and air filtration. Nanofibers are fibers of polymeric origin with diameters in the nanometer to submicron range. Electrospinning has been the most widely used method to synthesize nanofibers with tunable properties such as high specific surface area, uniform pore size, and controlled hydrophobicity. These properties of nanofibers make them highly sought after as adsorbents, photocatalysts, electrode materials, and membranes. In this review article, a basic description of the electrospinning process is presented. Subsequently, the role of different operating parameters in the electrospinning process and precursor polymeric solution is reviewed with respect to their influence on nanofiber properties. Three key areas of nanofiber application for water treatment (desalination, heavy-metal removal, and contaminant of emerging concern (CEC) remediation) are explored. The latest research in these areas is critically reviewed. Nanofibers have shown promising results in the case of membrane distillation, reverse osmosis, and forward osmosis applications. For heavy-metal removal, nanofibers have been able to remove trace heavy metals due to the convenient incorporation of specific functional groups that show a high affinity for the target heavy metals. In the case of CECs, nanofibers have been utilized not only as adsorbents but also as materials to localize and immobilize the trace contaminants, making further degradation by photocatalytic and electrochemical processes more efficient. The key issues with nanofiber application in water treatment include the lack of studies that explore the role of the background water matrix in impacting the contaminant removal performance, regeneration, and recyclability of nanofibers. Furthermore, the end-of-life disposal of nanofibers needs to be explored. The availability of more such studies will facilitate the adoption of nanofibers for water treatment applications.

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Section: Applications Of Nanofibers For Water Treatmentmentioning

confidence: 99%

Section: Applications Of Nanofibers For Water Treatmentmentioning

confidence: 99%

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

et al. 2021

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“…With a different approach, Goldhahn et al [479] developed wood and gelatin tunable biocomposite membranes for water decontamination from various pollutants. Furthermore, the use of nanomaterials in the fabrication of superhydrophobic membranes for water desalination via membrane distillation has been deeply revised by Gontarek-Castro et al [480] and Castro-Muñoz [481].…”

Section: Other Innovative Biobased Composites Applicationsmentioning

confidence: 99%

Biobased composites from agro-industrial wastes and by-products

et al. 2021

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The greater awareness of non-renewable natural resources preservation needs has led to the development of more ecological high-performance polymeric materials with new functionalities. In this regard, biobased composites are considered interesting options, especially those obtained from agro-industrial wastes and by-products. These are low-cost raw materials derived from renewable sources, which are mostly biodegradable and would otherwise typically be discarded. In this review, recent and innovative academic studies on composites obtained from biopolymers, natural fillers and active agents, as well as green-synthesized nanoparticles are presented. An in-depth discussion of biobased composites structures, properties, manufacture, and life-cycle assessment (LCA) is provided along with a wide up-to-date overview of the most recent works in the field with appropriate references. Potential uses of biobased composites from agri-food residues such as active and intelligent food packaging, agricultural inputs, tissue engineering, among others are described, considering that the specific characteristics of these materials should match the proposed application.

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“…MD is driven by the vapor pressure difference across the membrane, which can be induced by a gradient of temperature or concentration. Numerous hydrophobic membranes have been developed and tested in laboratory on a model brine solution, proving the efficiency of MD in water desalination [ 7 , 8 , 9 ]. Among them, polypropylene (PP) [ 10 ], polytetrafluoroethylene (PTFE) [ 11 ] and poly (vinylidene fluoride) (PVDF) [ 12 ] are the most popular ones.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Coated PVDF Membranes: Effects of Multi-Scale Rough Structure on Membrane Distillation Performance

et al. 2022

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Graphene-coated membranes for membrane distillation have been fabricated by using a wet-filtration approach. Graphene nanoplatelets have been deposited onto PVDF membrane surfaces. Morphology and physicochemical properties have been explored to evaluate the changes in the surface topography and related effects on the membrane performance in water desalination. The membranes have been tested in membrane distillation plants by using mixtures of sodium chloride and humic acid. The multi-scale rough structure of the surface has been envisaged to amplify the wetting and fouling resistance of the graphene-coated membranes so that a better flux and full salt rejection have been achieved in comparison with pristine PVDF. Total salt rejection and an increase of 77% in flux have been observed for coated membrane with optimized graphene content when worked with NaCl 0.6 M (DCMD, ΔT ≈ 24 °C) over a test period of 6 h. The experimental findings suggest these novel graphene-coated membranes as promising materials to develop functional membranes for high-performing water desalination.

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New insights of nanomaterials usage toward superhydrophobic membranes for water desalination via membrane distillation: A review

Cited by 73 publications

References 159 publications

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Biobased composites from agro-industrial wastes and by-products

Graphene-Coated PVDF Membranes: Effects of Multi-Scale Rough Structure on Membrane Distillation Performance

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