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Membranes
Special Issues
Advanced Nanofiltration Membranes
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Advanced Nanofiltration Membranes

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

Deadline for manuscript submissions: closed (31 May 2018)

Special Issue Editors

Prof. Dr. Mohamed Khayet

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Guest Editor
Department of Structure of Matter, Thermal Physics and Electronics Faculty of Physics, University Complutense of Madrid Avda. Complutense s/n, 28040 Madrid, Spain
Interests: membrane science and technology (membrane preparation; nanofibrous membranes; hollow fiber membranes; nanocomposite and mixed matrix membranes; membrane modification; membrane characterization; membrane processes)
Special Issues, Collections and Topics in MDPI journals
Dr. Paula Arribas Fernández

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Guest Editor
Department of Applied Physics I, Faculty of Physics, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain
Interests: membrane fabrication; membrane modification; membrane characterization; water and wastewater treatment; water clearance and desinfectation; membrane processes: microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis, membrane distillation, electrofiltration, electroosmosis; flat-sheet membrane; hollow fiber membrane; nanofibrous membrane; interfacial polymerization; polymeric nanofibers; composite and nanocomposite membranes; carbon namomaterial-based membranes; membrane characterization techniques (SEM, AFM, XPS, EDX, FTIR-ATR, XRD, fluorescence microscope, contact angle measurement, etc); coupling of membrane processes with solar energy systems

Special Issue Information

Dear Colleagues,

This Special Issue, entitled “Advanced Nanofiltration Membranes”, is motivated by the growing interest in developing novel and advanced nanofiltration (NF) membranes by various research groups. This includes hollow fiber NF membranes, flat-sheet NF membranes, polymeric NF membranes, ceramic NF membranes, solvent-resistant NF membranes, aquaporin-based NF membranes, layer-by-layer polyelectrolyte NF membranes, NF membrane fabrication (e.g., phase inversion, electrospinning, chemical treatment, surface coating, interfacial polymerization, UV grafting/photografting, electron beam irradiation, plasma treatment, layer-by-layer, incorporation of single/multiple types of nanoparticles, addition of carbon-based nanomaterials, insertion of metal-organic frameworks, etc.), NF membrane characterization (e.g., chemical, structural, morphological, electrical, compositional, mechanical and topographical properties, as well as membrane transport, scaling and fouling mechanisms, etc.), and applications of NF membranes in different fields (e.g., separation and purification, drinking water production, wastewater treatment, desalination and solute concentration of different types of aqueous and organic solutions, solvent recovery,  pharmaceutical and biotechnological applications, food industry applications, etc.). Overall, this Special Issue is orientated to all the above-cited research topics in advanced NF membranes.

Considering your outstanding contribution in this interesting research filed, I would like to cordially invite you to submit a paper to this Special Issue. The manuscript should be submitted online before 31 May 2018.

Sincerely yours,

Prof. Dr. Mohamed Khayet
Dr. Paula Arribas Fernández
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Membrane fabrication
  • Membrane modification
  • characterization techniques
  • flat-sheet membrane
  • hollow fiber membrane
  • electrospinning
  • nanofiber
  • interfacial polymerization
  • ultrafiltration
  • microfiltration
  • nanofiltration
  • forward osmosis
  • reverse osmosis
  • electrofiltration

Published Papers (2 papers)

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13 pages, 1245 KiB  
Communication
Comparison of NF-RO and RO-NF for the Treatment of Mature Landfill Leachates: A Guide for Landfill Operators
by Sreenivasan Ramaswami, Joachim Behrendt and Ralf Otterpohl
Membranes 2018, 8(2), 17; https://doi.org/10.3390/membranes8020017 - 21 Mar 2018
Cited by 22 | Viewed by 7994
Abstract
Reverse osmosis (RO) and nanofiltration (NF) are among the state-of-the-art technologies for treating landfill leachates. Due to the complexity and variance in the composition of leachates, numerous combinations of multiple technologies are used for their treatment. One process chain for the treatment of [...] Read more.
Reverse osmosis (RO) and nanofiltration (NF) are among the state-of-the-art technologies for treating landfill leachates. Due to the complexity and variance in the composition of leachates, numerous combinations of multiple technologies are used for their treatment. One process chain for the treatment of raw leachate is RO followed by further concentration of RO-retentate using NF (RO-NF scheme). The aptness of this process train used by some landfill sites around the world (usually with the aim of volume reduction so as to re-inject the concentrate into the landfill) is questionable. This study investigated two schemes RO-NF and NF-RO (nanofiltration of raw leachate followed by reverse osmosis of NF permeate) to identify their merits/demerits. Experiments were conducted in bench scale using commercial membranes: DOW Filmtec NF270 and SW30HR. Filtration trials were performed at different pressures to compare the water and solute transports in the individual stages of the two schemes. Based on the water fluxes and compositions of retentates and permeates; osmotic pressures, energy demands, and other possible operational advantages were discussed. NF-RO offers some advantages and flexibility for leachate treatment besides being energy efficient compared to RO-NF, wherein osmotic pressure steadily increases during operation in turn increasing operation and maintenance costs. Full article
(This article belongs to the Special Issue Advanced Nanofiltration Membranes)
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Review

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5586 KiB  
Review
Toward the Fabrication of Advanced Nanofiltration Membranes by Controlling Morphologies and Mesochannel Orientations of Hexagonal Lyotropic Liquid Crystals
by Guang Wang, Christopher J. Garvey, Han Zhao, Kang Huang and Lingxue Kong
Membranes 2017, 7(3), 37; https://doi.org/10.3390/membranes7030037 - 21 Jul 2017
Cited by 13 | Viewed by 7663
Abstract
Water scarcity has been recognized as one of the major threats to human activity, and, therefore, water purification technologies are increasingly drawing attention worldwide. Nanofiltration (NF) membrane technology has been proven to be an efficient and cost-effective way in terms of the size [...] Read more.
Water scarcity has been recognized as one of the major threats to human activity, and, therefore, water purification technologies are increasingly drawing attention worldwide. Nanofiltration (NF) membrane technology has been proven to be an efficient and cost-effective way in terms of the size and continuity of the nanostructure. Using a template based on hexagonal lyotropic liquid crystals (LLCs) and partitioning monomer units within this structure for subsequent photo-polymerisation presents a unique path for the fabrication of NF membranes, potentially producing pores of uniform size, ranging from 1 to 5 nm, and large surface areas. The subsequent orientation of this pore network in a direction normal to a flat polymer film that provides ideal transport properties associated with continuous pores running through the membrane has been achieved by the orientation of hexagonal LLCs through various strategies. This review presents the current progresses on the strategies for structure retention from a hexagonal LLCs template and the up-to-date techniques used for the reorientation of mesochanels for continuity through the whole membrane. Full article
(This article belongs to the Special Issue Advanced Nanofiltration Membranes)
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