Gradient-Pore-Engineered Janus Membranes for Sequential Molecular Sieving in Membrane Desalination DOI
Zhigao Zhu,

Maoquan Yuan,

Miao He

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 22, 2025

Membrane distillation (MD) holds significant promise for desalinating hypersaline wastewater but faces challenges in simultaneously rejecting both nonvolatile and volatile pollutants. Herein, we introduce a thermo-osmosis-evaporation (TOE) system utilizing asymmetric Janus membranes with gradient pores sequential molecular sieving, which achieved by sequentially vacuum filtering mixture of m-phenylenediamine (MPD) graphene oxide (GO) nanosheets onto hydrophobic electrospun poly(vinylidene fluoride) (PVDF) fibrous membrane, followed interfacial polymerization to form an ultrathin polyamide (PA) layer. The role the MPD-GO interlayer modulating structural properties selective transport behavior PA layer PA@MPD-GO configuration was systematically investigated. Results reveal that MPD effectively intercalates between layers GO nanosheets, significantly reducing mass transfer resistance water within membrane. Furthermore, present on membrane surface acts as monomer source polymerization, enabling formation ∼9 nm thick. optimized high flux 63 L m-2 h-1 at flow rate 480 mL min-1 under temperature 40 °C, 97.55% rejection phenylamine, while also demonstrating exceptional antifouling, antiwetting, antiscaling properties. This design offers promising approach advancing thermal desalination technologies treating complex scenarios.

Language: Английский

Optimizing Magnetic Carbon Nanotube/Polyaniline Nanocomposite for Sequestering Harmful Organic Contaminants DOI
Khalid Z. Elwakeel, Ahmed M. Elgarahy, M. Sh. Zoromba

et al.

Water Air & Soil Pollution, Journal Year: 2025, Volume and Issue: 236(4)

Published: March 7, 2025

Language: Английский

Citations

1
Wetting Challenges in Treatment of Raw Textile Wastewater by Membrane Distillation: A case study DOI Creative Commons
Marco Antônio Siqueira Rodrigues, Raffaele Cucciniello, Andreia S.F. Farinha

et al.

Case Studies in Chemical and Environmental Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 101197 - 101197

Published: March 1, 2025

Language: Английский

Citations

0
Influence of Silane Treatment on CNM/PAC/PVDF Properties and Performance for Water Desalination by VMD DOI Creative Commons

Samraa R. Khaleel,

Salah S. Ibrahim, Alessandra Criscuoli

et al.

Membranes, Journal Year: 2025, Volume and Issue: 15(4), P. 104 - 104

Published: April 1, 2025

Vacuum membrane distillation (VMD) is a promising process for water desalination. However, it suffers some obstacles, such as fouling and wetting, due to the inadequate hydrophobicity of high vacuum pressure on permeate side. Therefore, improving surface roughness important. In this study, effect 1H,1H,2H,2H-Perfluorodecyltriethoxysilane (PFTES) morphology performance CNM/PAC/PVDF membranes at various concentrations was investigated first time. Membrane characteristics FTIR, XRD, FE-SEM, EDX, contact angle, before after modification were analyzed tested using VMD The results showed that coated with 1 wt.% PFTES had higher flux lower rejection than 2 PFTES. enhanced angle 117° increased salt above 99.9%, set 23.2 L/m2·h 35 g/L NaCl feed solution, 65 °C temperature, 0.6 L/min flow rate, 21 kPa (abs) pressure. This means PFTES-coated PVDF exhibited slightly hydrophobicity, rejection, stability over long-term operation. These outstanding indicate potential novel CNM/PAC/PVDF/PFTES saline Moreover, study presents useful guidance enhancement structures physical properties in field desalination porous membranes.

Language: Английский

Citations

0
A Tunable Sponge-like Lipophilic Gel with Branched Poly(2-propyl aspartamide) Crosslinkers for Enhanced VOC Absorption DOI Creative Commons
Sangchul Shin,

Naseul Jung,

Hyewon Jeong

et al.

Gels, Journal Year: 2025, Volume and Issue: 11(4), P. 286 - 286

Published: April 13, 2025

In this study, we present a sponge-like lipophilic gel crosslinked with branched crosslinker as an absorbent for VOC removal. The was synthesized by crosslinking the monomer 3-(trimethoxysilyl)propyl methacrylate (TMSPMA) poly(2-propyl aspartamide) grafted (PPA-g-MA). crosslinker, PPA-g-MA, prepared introducing acrylate groups moieties to poly(succinimide) precursor (PPA), which serves hydrophobic backbone. Lipophilic gels were varying TMSPMA concentrations and freeze-dried form porous structure. To evaluate absorption, toluene removal efficiency of tested in continuous gas flow system. As result, optimal content maximizing determined. This result suggests that while increase silicon generally enhances efficiency, structure plays more crucial role absorption capacity. collapse structure, caused excessive making material rubber-like, explains why there exists effective absorption. Overall, these findings provide valuable insights developing high-performance absorbents.

Language: Английский

Citations

0
Gradient-Pore-Engineered Janus Membranes for Sequential Molecular Sieving in Membrane Desalination DOI
Zhigao Zhu,

Maoquan Yuan,

Miao He

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 22, 2025

Membrane distillation (MD) holds significant promise for desalinating hypersaline wastewater but faces challenges in simultaneously rejecting both nonvolatile and volatile pollutants. Herein, we introduce a thermo-osmosis-evaporation (TOE) system utilizing asymmetric Janus membranes with gradient pores sequential molecular sieving, which achieved by sequentially vacuum filtering mixture of m-phenylenediamine (MPD) graphene oxide (GO) nanosheets onto hydrophobic electrospun poly(vinylidene fluoride) (PVDF) fibrous membrane, followed interfacial polymerization to form an ultrathin polyamide (PA) layer. The role the MPD-GO interlayer modulating structural properties selective transport behavior PA layer PA@MPD-GO configuration was systematically investigated. Results reveal that MPD effectively intercalates between layers GO nanosheets, significantly reducing mass transfer resistance water within membrane. Furthermore, present on membrane surface acts as monomer source polymerization, enabling formation ∼9 nm thick. optimized high flux 63 L m-2 h-1 at flow rate 480 mL min-1 under temperature 40 °C, 97.55% rejection phenylamine, while also demonstrating exceptional antifouling, antiwetting, antiscaling properties. This design offers promising approach advancing thermal desalination technologies treating complex scenarios.

Language: Английский

Citations

0