Advanced Membranes for Microfiltration, Ultrafiltration, Nanofiltration and Reverse Osmosis

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

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 2747

Special Issue Editors

School of Resources and Environmental Engineering, Anhui University, Hefei, China
Interests: polymeric membranes; membrane preparation; nanofiltration membranes; ultrafiltration membranes; reverse osmosis membranes; thin-film nanocomposite membranes; nanoparticles; membrane simulation; electrodialysis membranes; ion separation; membrane antifouling; membrane antibacterial activity
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Guest Editor
McKetta Department of Chemical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, USA
Interests: membrane separations; nanofiltration; osmotically assisted reverse osmosis; desalination; graphene oxide membranes; 2D material membranes; polymeric membranes; mass transfer; chemical process modeling; numerical simulation; technoeconomic analysis
Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, China
Interests: design and construction of polymer-based nanocomposite and its application in ion selective separation and integrated circuit thermal management
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent decades, water scarcity has become a global problem due to increased water usage and water pollution. Pressure-driven membrane separations are an energy-efficient means of water treatment, in which the membrane can function as a selective barrier for the transport of water and rejection of solutes. The aqueous-phase membrane filtration process consists of four major categories based on membrane pore size (microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO)), the application of which depends on the feed water properties. Inspired by the above-mentioned pressure-driven aqueous membrane processes, membranes may also be adapted to process organic fluids, creating new unit operations such as organic solvent nanofiltration (OSN) or even organic solvent reverse osmosis (OSRO). These applications could lead to a more sustainable, low-carbon future for chemical industries, as well as improved environmental protection. 

This Special Issue aims to publish original research on pressure-driven membrane filtration. Its scope includes, but is not limited to:

  1. New membrane materials and their application in pressure-driven membrane processes, such as novel polymer materials, 2D materials, inorganic materials, MOF/COF materials, etc.;
  2. New membrane processes that employ pressure-driven membranes;
  3. Novel physically and chemically modified membranes and composite membranes for pressure-driven membrane separations;
  4. Simulations, including numerical, molecular, and process modeling of membrane materials, mass transport in membranes, and membrane processes;
  5. Techno-economic analysis (TEA) and life-cycle assessment (LCA) of pressure-driven membrane processes and systems. 

We look forward to receiving your contributions.

Dr. Chunyan Xu
Dr. Zhongzhen Wang
Dr. Bin Wu
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 preparation
  • polymeric membranes
  • inorganic membranes
  • two-dimensional membranes
  • nanocomposite membranes
  • MOF/COF membranes
  • membrane simulation
  • membrane processes
  • Membrane Techno-Economic Analysis (TEA)
  • Membrane Life-Cycle Assessment (LCA)

Published Papers (1 paper)

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Research

16 pages, 5656 KiB  
Article
Performance Evaluation of UF Membranes Derived from Recycled RO Membrane, a Step towards Circular Economy in Desalination
by Zia Ur Rehman, Hira Amjad, Sher Jamal Khan, Maria Yasmeen, Aftab Ahmad Khan and Noman Khalid Khanzada
Membranes 2023, 13(7), 628; https://doi.org/10.3390/membranes13070628 - 28 Jun 2023
Cited by 1 | Viewed by 2142
Abstract
Reverse osmosis (RO) spiral wound membrane generation reached 93.5% in 2020, resulting in 14,000 tons of used RO membranes being discarded annually into landfills, which is unprecedented. The current study aims to chemically convert the end-of-life RO membrane, followed by its performance evaluation [...] Read more.
Reverse osmosis (RO) spiral wound membrane generation reached 93.5% in 2020, resulting in 14,000 tons of used RO membranes being discarded annually into landfills, which is unprecedented. The current study aims to chemically convert the end-of-life RO membrane, followed by its performance evaluation and microbial removal efficiency on three different sources of water, i.e., tap water (TW), integrated constructed wetland permeate (ICW-P), and membrane bio-rector permeate (MBR-P), respectively. This was accomplished by selecting 6 years of spent Filmtech (LC-LE-4040) thin film composite type brackish water reverse osmosis (BWRO) membrane, followed by alkaline and acidic cleaning for 2 h. Finally, the conversion was carried out by 6% sodium hypochlorite (NaOCl) with 300,000 ppm/h exposure by active system (AS) using the clean in place CIP pump at 2 bars for 10 h duration. The membrane demonstrated 67% water recovery and 1% saltwater rejection, which means RO membrane now converted into recycled RO (R-RO) or (UF) by removal of the polyamide (PA) layer. Water recovery was 67% for TW, 68% for ICW-P, and 74% for MBR-P, respectively, with the consistent saltwater rejection rate of 1% being observed, while R-RO exhibited an effective COD removal of 65.79%, 62.96%, and 67.72% in TW, ICW-P, and MBR-P, respectively. The highest turbidity removal of 96% in the ICW-P was also recorded for R-RO. For morphological properties, SEM analysis of the R-RO membrane revealed a likewise appearance as a UF membrane, while pore size is also comparable with the UF membrane. The most probable number (MPN) also showed complete removal of total coliforms after passing through the R-RO membrane. These features made the R-RO membrane an excellent choice for drinking water treatment and wastewater treatment polishing steps. This solution can help developing nations to be efficient in resource recovery and contribute to the circular economy. Full article
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