Membrane Separation Technology Research, 2nd Edition

Topic Information

Dear Colleagues,

Membrane processes are separation processes, where the transported components can be separated employing a semipermeable polymeric or inorganic membrane with a particular structure. Membrane processes can generally occur without introducing additional chemicals to the feed stream and thus separate products according to their size, charges, and Gibbs hydration energy. Therefore, the membrane process, which is a type of rate-based separation using pressure (ΔP), electric (ΔE), and stream concentration (ΔC) as driving factors, has been widely utilized in the sectors of saltwater desalination, green chemical engineering, and wastewater treatment. This Topic aims to cover the latest achievements in innovative membrane materials and membrane processes. Original research and review papers with emphasis on, but not limited to, the following topics are welcome:

1. Membrane processes for desalination, classification, and purification;
2. Fabrication of new membrane materials;
3. Membrane processes integration, optimization, and intensification;
4. Membrane simulation and process modeling.

Dr. Chenxiao Jiang
Dr. Zhe Yang
Dr. Ying Mei
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Clean Technologies cleantechnol	5.9	9.4	2019	20.9 Days	CHF 1800	Submit
Materials materials	3.7	7.0	2008	14.4 Days	CHF 2600	Submit
Membranes membranes	4.2	9.4	2011	14.9 Days	CHF 2200	Submit
Polymers polymers	5.8	11.0	2009	13.4 Days	CHF 2700	Submit
Separations separations	3.5	6.4	2014	15.1 Days	CHF 2600	Submit
Water water	3.5	6.7	2009	17.7 Days	CHF 2600	Submit

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Published Papers (3 papers)

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All Water Membranes Separations Clean Technol. Polymers Materials

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37 pages, 12893 KB  

Open AccessArticle

Integrated Hydraulic and Mathematical Evaluation of Flat Sheet Polyamide Reverse Osmosis Membranes for Poultry Slaughterhouse Wastewater Treatment

by Andrei Zaharia, Valentin Nedeff, Juan A. López-Ramírez, Dumitra Raducanu, Narcis Barsan and Emilian Mosnegutu

Polymers 2026, 18(16), 1974; https://doi.org/10.3390/polym18161974 - 13 Aug 2026

Viewed by 197

Abstract

Reuse of industrial wastewater contributes to the conservation of freshwater resources and the implementation of the principles of the circular economy. In this study, the cyclic performance of a flat-sheet polyamide reverse osmosis membrane (PA-RO) for the advanced treatment of wastewater from a [...] Read more.

Reuse of industrial wastewater contributes to the conservation of freshwater resources and the implementation of the principles of the circular economy. In this study, the cyclic performance of a flat-sheet polyamide reverse osmosis membrane (PA-RO) for the advanced treatment of wastewater from a poultry slaughterhouse, pretreated by dissolved air flotation (DAF), was evaluated. The membrane was operated at three recirculation flow rates in successive filtration and chemical cleaning cycles to evaluate its hydraulic behavior, retention efficiency, fouling evolution, and permeate quality. Among the conditions investigated, the recirculation flow rate of 0.5 L/min provided the highest hydraulic stability and flux recovery under the investigated conditions, although hydraulic and microbiological performances were not optimized under the same operating conditions. The progressive deterioration of membrane performance during cyclic operation was associated with the accumulation of reversible and irreversible fouling, evidenced by the increase in hydraulic resistances and the incomplete flux recovery after chemical cleaning. Hierarchical clustering analysis (HCA) and mathematical modeling revealed strong relationships between operating conditions, membrane performance, and fouling evolution, generating predictive models with high coefficients of determination. The results demonstrate the potential of the cyclic operation of the PA-RO membrane to obtain a high-quality permeate intended for industrial reuse and provide a practical framework for optimizing operating conditions and fouling control strategies in membrane wastewater treatment processes. Full article

(This article belongs to the Topic Membrane Separation Technology Research, 2nd Edition)

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23 pages, 2024 KB  

Open AccessArticle

Highly Selective Membranes Based on Polydecylmethylsiloxane for VOC Removal: The Influence of α,ω-Diene Cross-Linker Length and Concentration

by Stepan E. Sokolov, Pavel O. Tokarev, Valentina K. Grudkovskaya, Ivan S. Levin, Maxim G. Shalygin and Evgenia A. Grushevenko

Clean Technol. 2026, 8(3), 94; https://doi.org/10.3390/cleantechnol8030094 - 16 Jun 2026

Viewed by 1376

Abstract

Membrane separation is an efficient approach for volatile organic compound (VOC) recovery from industrial off-gases due to its low energy consumption, compact design, and operational simplicity. Membrane-based VOC recovery critically depends on the membrane material, which must exhibit high VOC permeability and selectivity [...] Read more.

Membrane separation is an efficient approach for volatile organic compound (VOC) recovery from industrial off-gases due to its low energy consumption, compact design, and operational simplicity. Membrane-based VOC recovery critically depends on the membrane material, which must exhibit high VOC permeability and selectivity under mixed-gas conditions. In this study, novel highly selective membranes for VOC removal based on polydecylmethylsiloxane (PAMS-10) were synthesized using both polydimethylsiloxane and various α,ω-dienes as cross-linkers: 1,7-octadiene (OD), 1,9-decadiene (DD), and 1,11-dodecadiene (DdD). The influence of cross-linker concentration and length on mechanical, structural, sorption, and transport properties was examined extensively. The combination of three independent experimental methods (time-lag, vapor permeation, and in situ spectroscopic ellipsometry) revealed that increasing α,ω-diene concentration and decreasing its length led to a reduction in the diffusivity and permeability of permanent gases, gaseous hydrocarbons, and VOC vapors. For VOC/N₂ separation, the slightly cross-linked OD-1 membrane and the DdD-5 membrane, cross-linked with long 1,11-dodecadiene, demonstrated outstanding mixed-gas selectivities of 950/921/314/840 and 940/1084/233/1106 for toluene/n-octane/i-octane/n-butyl acetate, respectively. Notably, the DD-5 membrane, cross-linked with 1,9-decadiene, matching the length of the PAMS-10 side chain substituent, exhibited the best mechanical properties and mixed-gas selectivity comparable to the ideal selectivity, a unique behavior attributed to optimal supramolecular organization. Full article

(This article belongs to the Topic Membrane Separation Technology Research, 2nd Edition)

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18 pages, 4416 KB  

Open AccessArticle

Fabrication of Microphase-Separated Tröger’s Base Polymer Membranes for Oxygen Enrichment

by Chaoyue Yang, Li Zhou, Qian Zhang, Ya Huang, Peixiao Zhang, Jingwen Xue, Qing Li, Weijie Sun and Jiayou Liao

Membranes 2026, 16(1), 9; https://doi.org/10.3390/membranes16010009 - 30 Dec 2025

Cited by 1 | Viewed by 973

Abstract

Tröger’s base (TB) polymers have received increasing attention as a novel class of polymers with intrinsic microporosity, particularly for applications in gas separation. In this study, TB was quaternized with hydrophobic long chains to create a microphase-separated structure to enhance gas separation performance. [...] Read more.

Tröger’s base (TB) polymers have received increasing attention as a novel class of polymers with intrinsic microporosity, particularly for applications in gas separation. In this study, TB was quaternized with hydrophobic long chains to create a microphase-separated structure to enhance gas separation performance. On one hand, the tertiary amine structure of TB enabled facile grafting modification through the Menshutkin reaction. On the other hand, microphase-separated channels were created in the quaternized Tröger’s base (QTB) membrane due to the polarity differences between the hydrophilicity of the quaternary ammonium groups and hydrophobicity of iodoalkanes, providing channels for gas transport within the membrane and thereby improving permeability selectivity. The successful synthesis of QTB membranes was confirmed by FTIR and ¹H NMR spectroscopy, while AFM and SAXS analyses validated the microphase-separated morphology. To investigate the impact of microphase separation on oxygen permeability and selectivity, different iodoalkanes and various concentrations of iodobutane were grafted onto the TB backbone. Among the prepared membranes, QTB-C₄-70% membrane exhibited the highest in O₂ permeability. Gas separation performance under different O₂ pressures and temperatures revealed that O₂ permeability decreased slightly with increasing pressure, indicating good pressure stability of the membrane. With increasing temperature, the permeability increased while the selectivity decreased. These findings demonstrated that microphase-separated QTB membranes offer a viable strategy for creating effective materials for gas separation. Full article

(This article belongs to the Topic Membrane Separation Technology Research, 2nd Edition)

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