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Novel Application of Films and Coatings for Wastewater Treatment
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Novel Application of Films and Coatings for Wastewater Treatment

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Environmental Aspects in Colloid and Interface Science".

Deadline for manuscript submissions: 1 July 2026 | Viewed by 2836

Special Issue Editors

Prof. Dr. Charaf Laghlimi

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Guest Editor
ERCI2A, FSTH, Abdelmalek Essaadi University, Tetouan 93000, Morocco
Interests: analytical electrochemistry; electrochemical sensors and biosensors; wastewater treatment; electrochemical materials; cyclic voltammetry; square wave voltammetry; surface analysis techniques
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Younes Ziat

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Guest Editor
Engineering and Applied Physics Team (EAPT), Superior School of Technology, Sultan Moulay Slimane University, Beni Mellal 23000, Morocco
Interests: photovoltaic; solar radiation; solar thermal; semiconductors; DFT
Dr. Abdelaziz Moutcine

E-Mail Website
Guest Editor
ERCI2A, FSTH, Abdelmalek Essaadi University, Tetouan 93000, Morocco
Interests: analytical electrochemistry; electrochemical sensors and biosensors; wastewater treatment; electrochemical materials; cyclic voltammetry; square wave voltammetry; surface analysis techniques

Special Issue Information

Dear Colleagues,

Industrial activities pose a major challenge to the management of water contaminated by organic and inorganic pollutants and microorganisms. However, various wastewater treatment technologies that provide effective solutions to this problem have emerged. Theoretical and experimental developments in the application of functional materials as coating materials (e.g., carbon nanotubes/composites, graphene, nanoparticles, carbon nanofibers/nanotubes and nanoporous materials, oxides, etc.) play a central role in the advancement of these technologies due to their highly tunable properties and functions. This renewed interest in new coatings and films has led to the exploration of experimental and modelling activities in wastewater treatment and the detection of pollutants by novel sensors and biosensors.

The aim of this Special Issue, entitled “Novel Application of Films and Coatings for Wastewater Treatment”, is to promote and publish recent studies on wastewater treatment and the detection of organic and inorganic pollutants. The scope of this Special Issue includes (but is not limited to) the following topics:

  • Processes for coating deposition and modification;
  • Coating materials produced by different processes;
  • The theoretical and computational modelling of surfaces and interfaces;
  • DFT and experimental research based on thin films with regard to advances in wastewater treatment and the detection of pollutants by new sensors and biosensors;
  • Coatings for high temperatures;
  • The fundamental and functional properties of surface and interfaces;
  • Novel smart coatings for wastewater treatment;
  • New biopolymers for sustainable films and coatings;
  • Surface modification of sensors for the detection of organic and inorganic pollutants.

Prof. Dr. Charaf Laghlimi
Prof. Dr. Younes Ziat
Dr. Abdelaziz Moutcine
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 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-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings 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 2600 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

  • coating
  • wastewater treatment
  • surface modifications
  • functional materials
  • thin-film nanocomposite
  • nanocoatings
  • DFT
  • sensors and biosensors

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

17 pages, 2111 KB  
Article
Organic Pyridinium Salts as Corrosion Inhibitors for Mild Steel in Acidic Wastewater: Experimental and DFT Study
by Ayoub Koufi, Younes Ziat, Hamza Belkhanchi and Charaf Laghlimi
Coatings 2026, 16(2), 148; https://doi.org/10.3390/coatings16020148 - 23 Jan 2026
Viewed by 766
Abstract
Heterocyclic organic compounds, namely 1,1′-methylenebis(pyridinium) bromide (Inhibitor I) and 1,1′-ethylenebis(pyridinium) bromide (Inhibitor II), were investigated as corrosion inhibitors for mild steel in acidic wastewater (0.5 M H2SO4). The inhibition performance was evaluated using gravimetric weight-loss measurements and electrochemical techniques. [...] Read more.
Heterocyclic organic compounds, namely 1,1′-methylenebis(pyridinium) bromide (Inhibitor I) and 1,1′-ethylenebis(pyridinium) bromide (Inhibitor II), were investigated as corrosion inhibitors for mild steel in acidic wastewater (0.5 M H2SO4). The inhibition performance was evaluated using gravimetric weight-loss measurements and electrochemical techniques. The results show that increasing inhibitor concentration significantly reduces the corrosion rate and enhances the inhibition efficiency, reaching maximum values of 90.42% for Inhibitor I and 87.85% for Inhibitor II at 7.5 × 10−3 M. This improvement is associated with a notable decrease in corrosion current density, indicating adsorption of inhibitor molecules at the steel/electrolyte interface. Adsorption studies reveal that both inhibitors follow the Langmuir adsorption isotherm, suggesting a mixed physisorption–chemisorption mechanism. Density functional theory (DFT) calculations and molecular dynamics simulations provide qualitative insight into the adsorption behavior, emphasizing the contribution of heteroatoms and π-electron systems to inhibitor–metal interactions. Overall, Inhibitor I exhibits superior inhibition performance, which can be attributed to its higher molecular reactivity, lower HOMO–LUMO energy gap, and higher dipole moment. The combined experimental and theoretical results demonstrate that the investigated compounds exhibit high corrosion inhibition efficiency under the studied conditions for mild steel in acidic wastewater environments. Full article
(This article belongs to the Special Issue Novel Application of Films and Coatings for Wastewater Treatment)
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20 pages, 3626 KB  
Article
Superwettable Carbon Fiber Membranes Functionalized with Cu-TiO2: High-Performance Oil–Water Separation and Sustainable Reusability
by Yuqiang Chen, Yang Chen, Xiaojun Li, Renzhong Li, Gege Lei, Ziyang Jia, Dongjie Liu and Zongfan Duan
Coatings 2025, 15(11), 1273; https://doi.org/10.3390/coatings15111273 - 3 Nov 2025
Viewed by 1318
Abstract
Oily wastewater poses severe ecological and health threats, but conventional separation technologies have limitations like low efficiency or high energy consumption. Herein, two superwettable carbon fiber (CF)-based membranes were fabricated for efficient oil–water separation. Using CF (low cost, excellent mechanical stability) as the [...] Read more.
Oily wastewater poses severe ecological and health threats, but conventional separation technologies have limitations like low efficiency or high energy consumption. Herein, two superwettable carbon fiber (CF)-based membranes were fabricated for efficient oil–water separation. Using CF (low cost, excellent mechanical stability) as the substrate, Cu-TiO2@CF (superhydrophilic/underwater superoleophobic, renewable) was prepared via a deep ultraviolet (DUV)-assisted sol–gel method, and OTMS/Cu-TiO2@CF (superhydrophobic/superoleophilic) was obtained by modifying Cu-TiO2@CF with octadecyltrimethoxysilane (OTMS) via hydrothermal synthesis. Characterization showed Cu-TiO2 coatings uniformly covered CF, with strong substrate bonding. Both membranes exhibited outstanding performance: Cu-TiO2@CF achieved water fluxes of up to 79,839.6 L·m−2·h−1 and >97.3% separation efficiency for four oil–water mixtures; OTMS/Cu-TiO2@CF had a maximum oil flux of 86,593.4 L·m−2·h−1 and >98.1% efficiency. Cu-TiO2@CF regenerated via 10 min UV irradiation (restoring underwater oil contact angle to 153°), while OTMS/Cu-TiO2@CF achieved recovery through the process of UV irradiation followed by OTMS re-modification. Both membranes maintained stable performance over 100 cycles, demonstrating considerable potential for engineering applications. Full article
(This article belongs to the Special Issue Novel Application of Films and Coatings for Wastewater Treatment)
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