Advances in Membrane Technologies and Strategies for Water Treatment and Water Reuse

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 20 May 2025 | Viewed by 1789

Special Issue Editors


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Guest Editor
School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing, China
Interests: membrane

E-Mail Website
Guest Editor
School of Chemical and Environmental Engineering, China University of Mining Technology Beijing, Beijing 100083, China
Interests: membrane formation; phase separation; modeling and simulations; membrane application
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Special Issue Information

Dear Colleagues,

Global water demand is expected to amount to an increase of 20–30% above the current level of water use, mainly due to rising demand in the industrial and domestic sectors. The size of the global Water and Wastewater Treatment Technologies market is projected to grow from USD 272.5 billion in 2022 to USD 515.8 billion by 2028. Purification technologies for cleaning water include multi-effect evaporation, biological treatment, oxidation, precipitation, flocculation, membrane technology, etc. Among the different technologies, membrane technology can be regarded as one of the most effective and promising methods. In the future, to realize “carbon neutralization” in wastewater treatment and resource recovery, energy saving and water reuse will be the primary goals. Relevant research has progressed rapidly in recent years, including the development of new membrane materials, membrane preparation technology, and membrane processes, as well as other new strategies that combine membrane processes or other innovative technologies, etc. These new processes and technologies accelerate the realization of “carbon neutralization” in the field of wastewater treatment and water reuse.

This Special Issue welcomes original research papers, reviews, and tutorials on all aspects of advances in membrane technologies and strategies for water treatment and water reuse. Some of the topics include, but are not limited to, innovative methods for advanced nanotechnology, advanced membrane materials, novel membrane preparation, and process technology. Papers containing engineering ideas that are integrated with knowledge from other disciplines are also welcome. Environmental technologies that can be used to assess and remove emerging contaminants and cleaner sustainable processes are encouraged.

Dr. Weibin Cai
Dr. Yuanhui Tang
Guest Editors

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Keywords

  • membrane separation
  • membrane distillation
  • ion exchange membrane
  • desalination
  • wastewater treatment
  • zero-liquid discharge

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Published Papers (2 papers)

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Research

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19 pages, 9463 KiB  
Article
The Sandwich-Structured PVA/PA/PVA Tri-Layer Nanofiltration Membrane with High Performance for Desalination and Pollutant Removal
by Weibin Cai, Yuzhe Wang, Yuannan Li, Hong Ye, Fuyuan Xiao, Lei Wang and Hengjun Gai
Water 2024, 16(19), 2752; https://doi.org/10.3390/w16192752 - 27 Sep 2024
Viewed by 585
Abstract
Nanofiltration (NF) has become a widely used technology in water treatment due to its environmental friendliness, energy efficiency, cost-effectiveness, and operational simplicity. However, polyamide (PA) NF membranes still face challenges, including low permeate flux, limited resistance to organic pollutants, and inadequate resilience to [...] Read more.
Nanofiltration (NF) has become a widely used technology in water treatment due to its environmental friendliness, energy efficiency, cost-effectiveness, and operational simplicity. However, polyamide (PA) NF membranes still face challenges, including low permeate flux, limited resistance to organic pollutants, and inadequate resilience to residual chlorine. To address these issues, this study developed a thin-film composite (TFC) NF membrane featuring a separation layer of sandwich structure. Initially, a single separation layer of polyvinyl alcohol (PVA) NF membrane was prepared, followed by the fabrication of a PA layer on its surface, and ultimately, a second PVA layer was constructed on the PA layer. The experimental results show that the PVA/PA/PVA sandwich structure TFC exhibits high permeability to pure water and robust resistance to both pollution and residual chlorine. The PVA-0.20/PA/PVA-0.20 TFC, prepared with a 0.20%w/v PVA solution, achieved a pure water flux of up to 22.05 L m−2 h−1 bar−1 (LMH/bar), which was 2.92 times higher than that of the control TFC membrane. Additionally, it demonstrated a salt rejection rate exceeding 96% for Na2SO4 and over 99% for Congo Red (CR) and Victoria Blue B (VB). In comparison with the control TFC membrane, the PVA-0.20/PA/PVA-0.20 membrane exhibited significantly enhanced resistance to pollution. Following immersion in a 1000 ppm NaClO solution for 4 h, the rejection rate of the control TFC membrane decreased markedly and that of the PVA-0.20/PA/PVA-0.20 membrane decreased marginally, indicating excellent resistance to residual chlorine. Due to the robust overall performance of the PVA/PA/PVA membrane, it holds potential advantages for application in treating reclaimed water or slightly polluted water. Full article
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Review

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30 pages, 4928 KiB  
Review
Technological Advancements and Prospects for Near-Zero-Discharge Treatment of Semi-Coking Wastewater
by Bingxu Quan, Yuanhui Tang, Tingting Li, Huifang Yu, Tingting Cui, Chunhui Zhang, Lei Zhang, Peidong Su and Rui Zhang
Water 2024, 16(18), 2614; https://doi.org/10.3390/w16182614 - 15 Sep 2024
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Abstract
This review examines the technological bottlenecks, potential solutions, and future development directions in the treatment and resource utilization of semi-coking wastewater (SCOW) in China. By comprehensively investigating the semi-coking industry and analyzing wastewater treatment research hotspots and existing projects, this study systematically explores [...] Read more.
This review examines the technological bottlenecks, potential solutions, and future development directions in the treatment and resource utilization of semi-coking wastewater (SCOW) in China. By comprehensively investigating the semi-coking industry and analyzing wastewater treatment research hotspots and existing projects, this study systematically explores the current status and challenges of each treatment unit, emphasizing the necessity for innovative wastewater treatment technologies that offer high efficiency, engineering feasibility, environmental friendliness, and effective resource recovery. This review highlights prospects and recommendations, including the development of novel extractants for phenol and ammonia recovery, a deeper understanding of biological enhancement mechanisms, exogenous bio-enhancement materials, and the creation of cost-effective advanced oxidation process (AOP)-based combined processes. Additionally, it underscores the potential for repurposing SCOW as a valuable resource through appropriate treatment, whether recycling for production or other applications. Full article
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