Polymeric Membranes Engineered for Different Separation Processes

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Fabrication and Characterization".

Deadline for manuscript submissions: 31 May 2026 | Viewed by 630

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Department of Structure of Matter, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Plaza de Ciencias, 1, Ciudad Universitaria, 28040 Madrid, Spain
Interests: membrane science and technology; membrane design, preparation, characterization and modification; membrane engineering; hollow fiber membrane; polymeric membrane; polymer solution characterization; phase inversion; dry/wet spinning; wet/wet spinning; membrane morphology and structure; water treatment; membrane distillation; desalination; transport phenomena; complex fluids; thermodiffusion; fluctuating hydrodynamics
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Dear Colleagues,

Membrane-based separation processes have become essential technologies across a broad spectrum of industrial, environmental, and biomedical applications. Membrane technologies are at the forefront of modern separation processes, offering efficient and often energy-saving alternatives to traditional separation methods. Membrane engineers are endeavoring to prepare advanced membranes that fulfill the specific requirements of each separation process to enhance their performance.

This Special Issue covers the development and characterization of different types of membranes (i.e., flat-sheet, hollow fiber, electrospun nanofibrous, mixed-matrix, multi-layered, etc.) employed in several separation processes (e.g., micro/ultra/nanofiltration, reverse/forward osmosis, membrane distillation, etc.) and applications (e.g., desalination, wastewater treatment, industrial effluent treatment, gas separation, etc.). Key research lines include the preparation of advanced membranes using novel materials, functional additives, or nanocomposites, as well as the development of eco-friendly fabrication methods and membrane modification techniques to enhance membrane separation performance and durability or other relevant properties for the process, such as fouling resistance or mechanical stability.

Original research articles, comprehensive reviews, and short communications are all welcome. Submissions should present significant advances in membrane science with strong experimental, theoretical, or computational contributions that support the development of membrane separation technologies.

Dr. Loreto García Fernández
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Keywords

  • flat-sheet membrane
  • hollow fiber membrane
  • electrospun nanofibrous membrane
  • mixed matrix membrane
  • water treatment
  • gas separation
  • membrane distillation
  • pervaporation
  • reverse/forward osmosis
  • micro/ultra/nanofiltration

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Published Papers (1 paper)

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Research

17 pages, 2049 KB  
Article
Dewatering Hypersaline Na2SO4 and NaCl via Commercial Forward Osmosis Module
by Noel Devaere and Vladimiros G. Papangelakis
Membranes 2026, 16(1), 14; https://doi.org/10.3390/membranes16010014 - 31 Dec 2025
Viewed by 417
Abstract
Efficient water recycling in the hydrometallurgical industry requires the dewatering of hypersaline Na2SO4 or similar brines via non-evaporative methods. Unfortunately, many non-evaporative methods require the use of specific solutes and are not compatible with complex hydrometallurgical effluents. Forward Osmosis (FO) [...] Read more.
Efficient water recycling in the hydrometallurgical industry requires the dewatering of hypersaline Na2SO4 or similar brines via non-evaporative methods. Unfortunately, many non-evaporative methods require the use of specific solutes and are not compatible with complex hydrometallurgical effluents. Forward Osmosis (FO) uses a draw solution to link known non-evaporative water recycling methods with feed solutions that are otherwise incompatible. There is minimal experimental data on the dewatering performance of today’s available commercial FO membranes, especially with hypersaline concentrations (>70,000 mg/L total dissolved solids). This study tests the commercially available Aquaporin HFFO2 hollow fibre FO membrane module with hypersaline Na2SO4 or NaCl feed solutions versus a MgCl2 draw solution. It identifies a key requirement to maintain water flux above a certain threshold to prevent a decrease in Na Rejection or an increase in Mg reverse flux. It also defines a minimum osmotic differential that can be used to parameterize water flux, similar to the temperature of approach in heat exchangers, but to determine the extent of water removal in FO. We demonstrate that even under mildly acidic conditions, existing FO membranes can concentrate Na2SO4 to saturation, paving the way for their use in the hydrometallurgical industry. Full article
(This article belongs to the Special Issue Polymeric Membranes Engineered for Different Separation Processes)
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