Nanofiltration membrane with surface nanostructure induced by interfacial modification for heavy metal ions removal, salt selection and antibacterial

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(2), С. 112439 - 112439

Опубликована: Март 8, 2024

Язык: Английский

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Ion-selective Supramolecular Membrane with pH-regulated Smart Nanochannels for Lithium Extraction

Journal of Membrane Science, Год журнала: 2024, Номер 708, С. 123035 - 123035

Опубликована: Июнь 26, 2024

Язык: Английский

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A wavy AMXene-assisted leaf-like asymmetric polyamide membrane with fast permeability and high selectivity

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131488 - 131488

Опубликована: Янв. 1, 2025

Язык: Английский

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Strengthening nanofiltration membrane: Strategies for enhanced antifouling performance

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160964 - 160964

Опубликована: Фев. 1, 2025

Язык: Английский

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Heterostructured Polyamide Membrane with Dual-Charge Effects for Ultra-selective Nanofiltration

Journal of Membrane Science, Год журнала: 2025, Номер unknown, С. 123774 - 123774

Опубликована: Янв. 1, 2025

Язык: Английский

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Nanocapsules induce in situ grafting of polyelectrolytes and structural rearrangement of polyamide layers

Chemical Engineering Science, Год журнала: 2025, Номер unknown, С. 121437 - 121437

Опубликована: Фев. 1, 2025

Язык: Английский

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The Adverse Effect of Concentration Polarization on Ion–Ion Selectivity in Nanofiltration

Environmental Science & Technology Letters, Год журнала: 2023, Номер 10(4), С. 363 - 371

Опубликована: Март 9, 2023

While the detrimental effect of concentration polarization (CP) on water flux and solute rejection in pressure-driven membrane processes has been extensively explored, impact CP selectivity between solutes these somewhat overlooked. Considering growing interest solute–solute selectivity, this study, we explored ion–ion nanofiltration (NF) membranes. We first show discuss "reversed" observed trend monovalent cations NF, which is opposite to ions' hydrated size mobility solution. Next, apply film theory using three independent approaches evaluate extent boundary layer adjacent surface, from real ions can be calculated. Our calculated rejections cations, were higher correspondence with hydration properties solution, suggest that played a major role observed. Last, demonstrate how adversely affects commonly pursued monovalent–divalent ion separation NF. Overall, our results highlight necessity rigorously account for future studies NF minimizing as primary step improve solutes.

Язык: Английский

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Polyamide nanofiltration membranes with enhanced surface charge difference via large aqueous monomer

Journal of Membrane Science, Год журнала: 2024, Номер 713, С. 123284 - 123284

Опубликована: Сен. 2, 2024

Язык: Английский

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Catalytic chitosan/MXene/GO nanocomposite membrane for removing dye and heavy metals

Desalination, Год журнала: 2024, Номер 594, С. 118313 - 118313

Опубликована: Ноя. 12, 2024

Язык: Английский

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Mix-Charged Nanofiltration Membrane for Efficient Organic Removal from High-Salinity Wastewater: The Role of Charge Spatial Distribution

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

The efficient removal of organic contaminants from high-salinity wastewater is crucial for resource recovery and achieving zero discharge. Nanofiltration (NF) membranes are effective in separating compounds monovalent salts, but they typically exhibit an excessive rejection divalent salts. Modifying the charge characteristics NF can improve salt permeation; however, role spatial distribution governing transport behavior not fully understood. In this study, we developed a mix-charged membrane with horizontal by employing interfacial polymerization combined polyester template etching solvent-induced polyamine intercalation strategy. ratio positive to negative domains be precisely controlled adjusting aqueous monomer modifier type. X-ray photoelectron spectroscopy (XPS) depth profiling separation layer thickness analysis confirmed complete penetration polyamines into layer, providing direct evidence formation horizontally distributed domains. This unique results high density near-electroneutral surface, which facilitates permeation size-dependent "plug-in" modification covalent cross-linking further reduce pore size, enhancing small molecules. Additionally, demonstrated exceptional antifouling performance against both negatively positively charged pollutants, attributed its smooth surface. Molecular dynamics (MD) simulations revealed that weak electrostatic interactions tightly bound hydration contribute membrane's superior properties. work provides valuable insights design tailored microstructures distributions improved water treatment performance.

Язык: Английский

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