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Advanced Polymeric Materials for Water Purification

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: 31 January 2027 | Viewed by 2171

Editor

Special Issue Information

Dear Colleagues,

Water pollution has become a multifaceted global crisis, and addressing this issue requires more advanced water purification materials and technologies. The history of water purification encompasses a wide variety of methods, which are often based on advanced materials. Polymers are crucial in water purification for membrane filtration, coagulation/flocculation, scale inhibition, and the removal of specific pollutants through adsorption, ion exchange, and antimicrobial action, leveraging properties like controlled porosity, surface charge, and chemical affinity for sustainable, efficient contaminant removal at various stages of water treatment. Recent years have seen significant advancements in polymer science and engineering, including but not limited to sustainability (bio-based, recyclable), smart functionalities (self-healing, sensing, photochromic), and advanced composites (nanomaterials, hybrid matrices), driven by AI in discovery, 3D printing, and electrospinning, creating lighter, stronger, and more functional materials. These new progresses present new opportunities for the development of next-generation high-performance polymer materials and devices for water purification.

This Special Issue will feature a series of research and review documents that explore “Advanced Polymeric Materials for Water Purification” from different perspectives, covering membrane filtration, coagulation and flocculation, adsorption, ion exchange, antimicrobial action, and other water purification-related fields, with particular attention to material design, process optimization, and application exploration. The aim is to represent the state of the art and provide systematic information on structure–property relationships. We look forward to receiving contributions dealing with the related research fields. We hope this inspiring initiative will encourage your participation in advancing fundamental knowledge related to innovative and sustainable polymeric materials and technologies for water purification.

Prof. Dr. Gang Han
Guest Editor

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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly 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

  • polymers
  • water purification
  • membrane filtration
  • adsorption
  • ion exchange
  • coagulation and flocculation

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Published Papers (3 papers)

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Research

37 pages, 44150 KB  
Article
Structure–Property Relationships in Metakaolin Geopolymers Modified with Shell-Derived Calcium Particles for Multifunctional Wastewater Treatment
by Adriana-Gabriela Schiopu, Mihai Oproescu, Paul Mereuță, Sorin Georgian Moga, Ecaterina Magdalena Modan, Miruna-Adriana Ioța, Alexandru Berevoianu, Ștefan Mira, Marian-Cătălin Ducu, Elena Andreea Vijan, Daniela Istrate and Yasmin Loriana Teodora Grigore
Polymers 2026, 18(16), 2005; https://doi.org/10.3390/polym18162005 - 17 Aug 2026
Viewed by 181
Abstract
The sustainable valorization of marine shell waste as functional additives for geopolymer materials represents a promising strategy for developing multifunctional materials for environmental remediation. In this study, metakaolin-based geopolymers were modified with calcium-rich particles obtained by calcination of five marine shell species ( [...] Read more.
The sustainable valorization of marine shell waste as functional additives for geopolymer materials represents a promising strategy for developing multifunctional materials for environmental remediation. In this study, metakaolin-based geopolymers were modified with calcium-rich particles obtained by calcination of five marine shell species (Chamelea gallina, Mya arenaria, Mytilus edulis, Pecten maximus, and Rapana venosa) under identical synthesis conditions to evaluate the influence of shell mineralogy on the structural, textural, adsorption, and antibacterial properties of the resulting composites. The materials were comprehensively characterized by Fourier transform infrared spectroscopy in attenuated total reflectance (ATR-FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption–desorption (BET/BJH) analyses. Functional performance was assessed through methylene blue (MB) adsorption experiments, adsorption kinetic modeling, and antibacterial tests against Escherichia coli (E. coli). ATR-FTIR and XRD analyses confirmed the formation of a stable amorphous geopolymer network containing residual crystalline phases together with shell-derived calcium carbonate, predominantly as calcite or aragonite depending on shell origin. The incorporation of shell-derived particles modified the pore architecture of the geopolymers. GP-SJ exhibited the highest BET specific surface area (94.30 m2 g−1) and the most developed mesoporous structure. Among the investigated formulations, GP-RP showed the most favorable overall combination of functional properties under the investigated conditions, exhibiting the highest methylene blue removal efficiency (63.97%) and experimental adsorption capacity at 160 min (9.60 mg g−1), together with a comparatively high reduction in recoverable E. coli colonies during preliminary antibacterial screening. The combined structural and functional analyses demonstrate that the environmental performance of shell-modified geopolymers cannot be predicted from a single parameter such as BET surface area or calcium content alone, but results from the synergistic interaction between mineralogical composition, particle dispersion, pore accessibility, and matrix compactness. Under the investigated conditions, these findings provide evidence for proposed structure–property correlations under the investigated conditions and suggests that shell-derived calcium particles act as microstructural regulators of geopolymer matrices, providing a basis for the further development of sustainable multifunctional materials for simultaneous dye removal and bacterial reduction in wastewater treatment. Full article
(This article belongs to the Special Issue Advanced Polymeric Materials for Water Purification)
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21 pages, 4414 KB  
Article
Heterojunction FeTiO3/BiOCl Photocatalytic Polymer Film in an Airlift Reactor: Efficient Visible-Light Degradation of Pharmaceutical Pollutant
by Nergiz Kanmaz, Nese Cakir Yigit and Özlem Tuna
Polymers 2026, 18(10), 1246; https://doi.org/10.3390/polym18101246 - 20 May 2026
Viewed by 557
Abstract
The development of durable and practical polymer-supported photocatalytic materials that are suitable for use in continuous-flow systems has become an increasingly pressing issue in the field of water treatment. In this study, FeTiO3/BiOCl heterojunction structures were synthesized at different ratios and [...] Read more.
The development of durable and practical polymer-supported photocatalytic materials that are suitable for use in continuous-flow systems has become an increasingly pressing issue in the field of water treatment. In this study, FeTiO3/BiOCl heterojunction structures were synthesized at different ratios and integrated into a poly(vinylidene fluoride) (PVDF) matrix to develop photocatalytic thin-film systems. The resulting materials were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and UV–visible diffuse reflectance spectroscopy (UV-DRS) analyses. In photocatalytic experiments conducted under visible light, a 66.3% removal of doxycycline was achieved for pristine FeTiO3 within 180 min, whilst the FTO@BiOCl(III) composite reached 74.4%. In the PVDF-based thin-film system, the film catalyst demonstrated a removal efficiency of 68.9%. When the pH effect was investigated, the highest total removal of 90.3% was achieved under pH 6.0 conditions. Radical scavenging experiments revealed that superoxide radicals were the predominant active species (a decrease to 30.5% in the presence of benzoquinone (BQ). In experiments conducted in the air-lift reactor system, the P-FTO@BiOCl(III) film achieved approximately 65% removal after 9 h and maintained its structural stability. The PVDF-supported FeTiO3/BiOCl heterojunction thin-film system offers a noteworthy alternative for environmental applications due to its suitability for continuous systems, structural stability and effective photocatalytic performance. Full article
(This article belongs to the Special Issue Advanced Polymeric Materials for Water Purification)
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17 pages, 3534 KB  
Article
Antifouling Polysulfone/Multi-Walled Carbon Nanotube/Terbium Oxide Nanocomposite Nanofiltration Membrane for Dye Removal Applications
by Abeer M. Alosaimi
Polymers 2026, 18(10), 1165; https://doi.org/10.3390/polym18101165 - 9 May 2026
Viewed by 898
Abstract
Polysulfone (PSF) nanofiltration membranes incorporating oxidized multi-walled carbon nanotubes (o–MWCNTs) and terbium oxide (Tb2O3) nanoparticles were fabricated via the non-solvent-induced phase inversion technique. The effect of Tb2O3 loading (0, 1, 3, and 5% w/w [...] Read more.
Polysulfone (PSF) nanofiltration membranes incorporating oxidized multi-walled carbon nanotubes (o–MWCNTs) and terbium oxide (Tb2O3) nanoparticles were fabricated via the non-solvent-induced phase inversion technique. The effect of Tb2O3 loading (0, 1, 3, and 5% w/w) on membrane morphology, hydrophilicity, water permeability, dye rejection, and antibiofouling performance was systematically investigated. Membrane structure was characterized by FTIR spectroscopy, SEM, EDX, XRD, and water contact angle measurements. The results confirmed the successful incorporation of Tb2O3 within the membrane matrix, and morphological analysis revealed a relatively dense membrane structure without macrovoid formation. Filtration experiments conducted in a dead-end cell under pressures of 1–4 bar demonstrated a maximum water flux of 53 L m−2 h−1, with dye rejection exceeding 99.9% for both methylene blue (MB) and Congo red (CR) at 4 bar. Antibiofouling performance, evaluated by colony-forming unit analysis, revealed bacterial growth reductions of 59% against Gram-negative Escherichia coli and 89% against Gram-positive Candida albicans, attributed to the dark-active generation of reactive oxygen species by Tb2O3, eliminating the need for UV irradiation. These results demonstrate that the synergistic integration of o–MWCNTs and Tb2O3 effectively addresses the permeability-selectivity trade-off and mitigates biofouling limitations associated with pristine PSF membranes, thereby offering a promising multifunctional platform for sustainable industrial wastewater treatment. Full article
(This article belongs to the Special Issue Advanced Polymeric Materials for Water Purification)
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