Mass transport mechanism of nitrate selective nanofiltration membranes on the basis of the Donnan steric pore model with dielectric exclusion (DSPM-DE)

Chemical Engineering Journal, Год журнала: 2024, Номер 493, С. 152775 - 152775

Опубликована: Июнь 2, 2024

Nanofiltration (NF) membranes can play an important role to mitigate the nitrate pollution, emphasizing necessity for understanding its mass transport mechanism enhance water purification strategies. This study focuses on separation capabilities of thin film composite NF having a polyamide (PA) selective layer. The layer was fabricated through interfacial polymerization, with varying piperazine (PIP) and trimesoyl chloride (TMC) monomer concentrations porous polyacrylonitrile substrates. We studied their retention aqueous solutions PEG 200, single salts (NaCl, NaNO3, Na2SO4), mixed (NaCl + NaNO3 Na2SO4). Through new fitting scheme, Donnan Steric Pore Model Dielectric Exclusion (DSPM-DE) utilized correlate PIP TMC ion exclusion mechanisms responsible membranes' capabilities. model could simulate Na+/NO3-/SO42- system but not Na+/NO3-/Cl-. diffusion were dominant partitioning mechanisms, respectively, explaining high retentions sulfate (96 99 %) negative (−24 11 %). sheds light potential PA layers efficient nitrate/sulfate separation, providing valuable insights into underlying mechanisms.

Язык: Английский

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Solvent‐Induced Deformation of Aramid Nanofibers for Ultrahigh‐Flux Nanofiltration Membranes

Advanced Functional Materials, Год журнала: 2023, Номер 34(16)

Опубликована: Дек. 29, 2023

Abstract Aramid nanofibers (ANFs), as promising organic nano building blocks for their high mechanical strength and thermal stability, are widely applied to fabricate energy‐efficient membranes ionic molecular sieving in aqueous solutions. However, the existing ANFs often have small diameters, limiting permeability of resulting membranes. Here, with a diameter hundred‐nanometer scale fabricated through progressive protonation process, which dimethylformamide secondary deprotonation solvent is added into dimethyl sulfoxide provide mild deformation environment. Then, deformed prepare larger pore size distribution higher surface charge. Notably, water flux can reach up 410 L m −2 h −1 bar , 40 times than commercially available nanofiltration much currently reported ANF‐based Impressively, these super‐stable nanochannels maintain over 194 wide range pH values from 4 10 show excellent long‐term durability 120 h. The application provides new approach designing next generation balance trade‐off between selectivity.

Язык: Английский

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Boehmite interlayer-induced high-performance nanofiltration membrane for enhanced treatment of antibiotics

Desalination, Год журнала: 2025, Номер unknown, С. 118589 - 118589

Опубликована: Янв. 1, 2025

Язык: Английский

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Surface-Engineered Nanofiltration Membranes for Sustainable Lithium Recovery from Real Brine: Addressing Fouling and Scaling Challenges

Water Research, Год журнала: 2025, Номер 278, С. 123400 - 123400

Опубликована: Фев. 27, 2025

Язык: Английский

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Tailored design of nanofiltration membrane with MoS2 quantum dots for enhancing selectivity and scaling resistance

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 132520 - 132520

Опубликована: Март 1, 2025

Язык: Английский

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