A Critical Review on Thin-Film Nanocomposite Membranes with Interlayered Structure: Mechanisms, Recent Developments, and Environmental Applications

Environmental Science & Technology, Journal Year: 2020, Volume and Issue: 54(24), P. 15563 - 15583

Published: Nov. 19, 2020

The separation properties of polyamide reverse osmosis and nanofiltration membranes, widely applied for desalination water reuse, are constrained by the permeability-selectivity upper bound. Although thin-film nanocomposite (TFN) membranes incorporating nanomaterials exhibit enhanced permeance, their rejection is only moderately improved or even impaired due to agglomeration formation defects. A novel type TFN featuring an interlayer (TFNi) has emerged in recent years. These TFNi show extraordinary improvement flux (e.g., up order magnitude enhancement) along with better selectivity. Such enhancements can be achieved a wide selection nanomaterials, ranging from nanoparticles, one-/two-dimensional materials, interfacial coatings. use nanostructured interlayers not improves layers but also provides optimized transport path, which enables potentially overcome longstanding trade-off between membrane permeability Furthermore, enhance removal heavy metals micropollutants, critical many environmental applications. This review critically examines developments discusses underlying mechanisms design criteria. Their potential applications highlighted.

Language: Английский

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Tailored design of nanofiltration membranes for water treatment based on synthesis–property–performance relationships

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 51(2), P. 672 - 719

Published: Dec. 21, 2021

This review article is devoted to bridging the conventional and newly-developed NF membranes with potential environmental applications by systematically discussing synthesis–property–performance relationships.

Language: Английский

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A critical review on porous substrates of TFC polyamide membranes: Mechanisms, membrane performances, and future perspectives

Journal of Membrane Science, Journal Year: 2021, Volume and Issue: 641, P. 119871 - 119871

Published: Sept. 21, 2021

Language: Английский

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Nanofiltration Membranes with Crumpled Polyamide Films: A Critical Review on Mechanisms, Performances, and Environmental Applications

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(18), P. 12811 - 12827

Published: Sept. 1, 2022

Nanofiltration (NF) membranes have been widely applied in many important environmental applications, including water softening, surface/groundwater purification, wastewater treatment, and reuse. In recent years, a new class of piperazine (PIP)-based NF featuring crumpled polyamide layer has received considerable attention because their great potential for achieving dramatic improvements membrane separation performance. Since the report novel Turing structures that exhibited an order magnitude enhancement permeance ( Science 2018, 360 (6388), 518−521), number published research papers on this emerging topic grown exponentially to approximately 200. critical review, we provide systematic framework classify morphologies. The fundamental mechanisms fabrication methods involved formation these morphologies are summarized. We then discuss transport solutes how phenomena could simultaneously improve permeance, selectivity, antifouling applications highlighted, future opportunities/needs identified. insights review guidance further development high-performance tailored wide range applications.

Language: Английский

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Metal-organic framework enables ultraselective polyamide membrane for desalination and water reuse

Science Advances, Journal Year: 2022, Volume and Issue: 8(10)

Published: March 9, 2022

While reverse osmosis (RO) is the leading technology to address global challenge of water scarcity through desalination and potable reuse wastewater, current RO membranes fall short in rejecting certain harmful constituents from seawater (e.g., boron) wastewater [e.g., N-nitrosodimethylamine (NDMA)]. In this study, we develop an ultraselective polyamide (PA) membrane by enhancing interfacial polymerization with amphiphilic metal-organic framework (MOF) nanoflakes. These MOF nanoflakes horizontally align at water/hexane interface accelerate transport diamine monomers across retain gas bubbles heat reaction zone. mechanisms synergistically lead formation a crumpled ultrathin PA nanofilm intrinsic thickness ~5 nm high cross-linking degree ~98%. The resulting delivers exceptional performance that beyond existing upper bound permselectivity exhibited very rejection (>90%) boron NDMA unmatched state-of-the-art membranes.

Language: Английский

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Nanofiltration for drinking water treatment: a review

Frontiers of Chemical Science and Engineering, Journal Year: 2021, Volume and Issue: 16(5), P. 681 - 698

Published: Nov. 26, 2021

Language: Английский

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Carbon Nanotube Interlayer Enhances Water Permeance and Antifouling Performance of Nanofiltration Membranes: Mechanisms and Experimental Evidence

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(4), P. 2656 - 2664

Published: Feb. 3, 2022

Interlayered thin-film nanocomposite (TFNi) membranes have been shown to achieve enhanced water permeance as a result of the gutter effect. Nevertheless, some studies report impaired separation performance after inclusion an interlayer. In this study, we resolve competing mechanisms transport in transverse direction vs that normal direction. To enable easy comparison, carbon nanotube (CNT)-incorporated TFNi with identical polyamide rejection layer but different interlayer thicknesses were investigated. While increasing thickness CNT facilitates (therefore improving effect), it simultaneously increases its hydraulic resistance An optimal 13.0 ± 0.7 L m–2 h–1 bar–1, which was more than doubled over control membrane 6.1 realized at moderate thickness, resulting from trade-off between these two mechanisms. demonstrate reduced fouling and improved reversibility for without interlayer, can be attributed uniform flux distribution. The fundamental revealed study lay solid foundation future development toward properties antifouling ability.

Language: Английский

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Modified-pollen confined hybrid system: A promising union for visible-light-driven photocatalytic antibiotic degradation

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 330, P. 122621 - 122621

Published: March 13, 2023

Language: Английский

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Significant roles of substrate properties in forward osmosis membrane performance: A review

Desalination, Journal Year: 2022, Volume and Issue: 528, P. 115615 - 115615

Published: Feb. 10, 2022

Language: Английский

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Tweak in Puzzle: Tailoring Membrane Chemistry and Structure toward Targeted Removal of Organic Micropollutants for Water Reuse

Environmental Science & Technology Letters, Journal Year: 2022, Volume and Issue: 9(4), P. 247 - 257

Published: March 25, 2022

Membrane-based water reuse through reverse osmosis (RO) and nanofiltration (NF) faces a critical challenge from organic micropollutants (OMPs). Conventional polyamide RO NF membranes often lack adequate selectivity to achieve sufficient removal of toxic harmful OMPs in water. Tailoring membrane chemistry structure allow highly selective has risen as an important topic membrane-based reuse. However, literature gap remains be addressed: how design for more OMPs. In this review, we critically analyzed the roles on highlighted opportunities strategies toward context Specifically, statistically rejection by conventional illustrate their drawbacks removal, followed discussion underlying fundamental mechanisms. Corresponding tailor properties improving against OMPs, including surface modification, nanoarchitecture construction, deployment alternative materials, were systematically assessed terms permeance, rejection, water–OMPs selectivity. end, discussed potential challenges various scale-up real applications.

Language: Английский

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