Hybrid Materials and Their Uses in Water Treatment, Desalination and Reuse

A special issue of ChemEngineering (ISSN 2305-7084).

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 9959

Special Issue Editors


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Guest Editor
Laboratory of Reaction Engineering, Faculty of Mechanical Engineering and Process Engineering, USTHB, BP 32, Algiers 16111, Algeria
Interests: nanoparticles; hybrid processes; photocatalysis; polymeric nanocomposites; pharmaceutical engineering

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Guest Editor
El-Madina Higher Institute for Engineering and Technology, Giza, Egypt
Interests: nanomaterials; adsorption; photocatalysis; polymeric nanocomposites; solid waste engineering
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Institute for Water Resources and Water Supply, Hamburg University of Technology, Am Schwarzenberg-Campus 3, 20173 Hamburg, Germany
Interests: carbon and iron oxide materials; metal-organic frameworks (MOFs); membranes; heavy metals; adsorption of contaminants; advanced adsorption and electrosorption strategies; water treatment

Special Issue Information

Dear Colleagues,

Recently, water purification, sanitation and reuse of polluted wastewater have become worldwide critical problems according to the 2030 Sustainable Development Goals. With current levels of industrial and urbanization expansion, avoiding organic pollutants and toxic heavy metals from poisoning water is particularly challenging. As a result, new effective water and wastewater treatment technologies are necessary. There are a variety of effective techniques capable to achieve efficient results regarding treated water quality, treatment time, energy consumption and sustainability requirements. However, aspects like treatment duration and energy usage must be improved. During the last decade, much research has been published on combining processes. For example, the combination of photocatalysis with other techniques using many hybrid materials has shown considerable promise in organic pollutant degradation, inorganic pollutant reduction, and/or microbiological inactivation. The main topic of this Special Issue (SI) will be investigating novel hybrid materials, with a focus on their application in water and wastewater treatment. An essential study track that is urged to be included in this SI is the assessment of the chemical, physical, and morphological properties of hybrid materials and their optimization using various research instruments, as well as the feasibility and efficiency of suggested solutions.

Potential topics include, but are not limited to:

  • Advanced wastewater technologies.
  • Combined processes for water treatment and purification.
  • Nanomaterials and catalysts.Adsorbents coupled with catalysts.
  • Adsorption and photocatalysis.
  • Degradation and reduction of organic and inorganic pollutants.
  • Organic/Inorganic materials.
  • Coagulation, Flocculation, Fenton, Plasma and Ozonation.
  • Water treatment and desalination.

Dr. Oussama Baaloudj
Dr. Ahmed K. Badawi
Dr. Muhammad Usman
Guest Editors

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Keywords

  • hybrid materials
  • materials characterization
  • combined systems
  • environment
  • water treatment and management
  • water engineering
  • advanced oxidation processes
  • photocatalysis
  • adsorption
  • desalination
  • sustainability

Published Papers (3 papers)

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Research

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10 pages, 2840 KiB  
Article
Photocatalytic and Glucose Sensing Properties of ZnO-Based Nanocoating
by Dina Bakranova, Bekbolat Seitov and Nurlan Bakranov
ChemEngineering 2023, 7(2), 22; https://doi.org/10.3390/chemengineering7020022 - 09 Mar 2023
Cited by 3 | Viewed by 1523
Abstract
Here, we report a simple and versatile synthesis of low-dimensional ZnO nanosheet (NS) arrays modified with Fe2O3 (hematite) to assemble photocatalytic coatings and non-enzymatic glucose sensors. Photocatalytic coatings made of widespread elements (zinc and iron) were tested for methylene blue [...] Read more.
Here, we report a simple and versatile synthesis of low-dimensional ZnO nanosheet (NS) arrays modified with Fe2O3 (hematite) to assemble photocatalytic coatings and non-enzymatic glucose sensors. Photocatalytic coatings made of widespread elements (zinc and iron) were tested for methylene blue (MB) dye decolorization under ultraviolet and visible (UV-vis) irradiation. A comparative study of unmodified and modified ZnO NS photocatalysts revealed a significant decrease in the dye concentration in 180 min when ZnO/Fe2O3 arrays were used. Size dependence efficiency of the hematite layer deposited onto ZnO is presented. A study of the sensitivity of biosensors made of ZnO nanostructures and ZnO/Fe2O3 nanocomposites for glucose detection showed an improvement in sensitivity with increased Fe2O3 thickness. The structure and morphology of low-dimensional coatings were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX). The optical properties of nanoarrays showed a red shift of absorption after modifying ZnO with hematite layers, which holds good promise for expanding photocatalytic activity in the visible region. Full article
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13 pages, 3040 KiB  
Article
Polyaniline/Bi12TiO20 Hybrid System for Cefixime Removal by Combining Adsorption and Photocatalytic Degradation
by Oussama Baaloudj, Noureddine Nasrallah, Hamza Kenfoud, Khaled Wassim Bourkeb and Ahmad K. Badawi
ChemEngineering 2023, 7(1), 4; https://doi.org/10.3390/chemengineering7010004 - 10 Jan 2023
Cited by 24 | Viewed by 2227
Abstract
Sillenite catalysts have shown efficient photocatalytic activity for the removal of various pollutants from water in previous studies, thus enhancing their activity by combining them with other materials will be very promising for environmental applications. In this context, an interesting hybrid system containing [...] Read more.
Sillenite catalysts have shown efficient photocatalytic activity for the removal of various pollutants from water in previous studies, thus enhancing their activity by combining them with other materials will be very promising for environmental applications. In this context, an interesting hybrid system containing Polyaniline (PANI) as an adsorbent and Bi12TiO20 (BTO) sillenite as a catalyst was proposed in this work. Cefixime (CFX) has been selected as a pollutant for this study, and its removal was evaluated using PANI (adsorption), PANI and BTO (combined system) and the hybrid system Bi12TiO20/Polyaniline (BTO/PANI). First, the impact of PANI adsorption was investigated on its own; after that, the solution was filtered to separate the adsorbent from the liquid in order to re-treat the solution using photocatalysis (combining adsorption with photocatalysis). At the same time, a similar technique was used involving the hybrid system BTO/PANI. The results show that the hybrid system can remove a very high Cefixime concentration of 30 mg/L, almost 100%, within only 2 h, and this is better than previous investigations. These results indicate that it is possible to combine photocatalysis and adsorption processes to control water pollution. Full article
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Review

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33 pages, 868 KiB  
Review
Current Trends in the Utilization of Photolysis and Photocatalysis Treatment Processes for the Remediation of Dye Wastewater: A Short Review
by S M Anisuzzaman, Collin G. Joseph, Chuan Kian Pang, Nur Ammarah Affandi, Sitti Nurazida Maruja and Veena Vijayan
ChemEngineering 2022, 6(4), 58; https://doi.org/10.3390/chemengineering6040058 - 01 Aug 2022
Cited by 33 | Viewed by 4230
Abstract
Development in the textile industry leads to an increased demand for the use of various dyes. Moreover, there is the use of some dyes in the food industry as well as medical diagnostics. Thereby, increased demand for dyes in various fields has resulted [...] Read more.
Development in the textile industry leads to an increased demand for the use of various dyes. Moreover, there is the use of some dyes in the food industry as well as medical diagnostics. Thereby, increased demand for dyes in various fields has resulted in dye-containing wastewater. Only a small portion of the generated wastewater is adequately treated. The rest is usually dumped or otherwise directly discharged into the sewage system, which ultimately enters rivers, lakes, and streams. The handling and disposal of such concentrated wastewater, especially the dye-containing wastewater, is considered to be a major environmental issue from the moment of its generation to its ultimate disposal. Conventional water treatment methods such as flotation, filtration, adsorption, etc., are non-destructive physical separation processes. They only transfer the pollutants to other phases, thereby generating concentrated deposits. The advanced oxidation process (AOP) is one of the most effective emerging methods for the treatment of wastewater containing chemical pollutants. The method involves the formation and interaction of highly reactive hydroxyl radicals under suitable activation conditions. These radicals are non-selective and efficient for the destruction and eventual mineralization of recalcitrant organic pollutants. This review aims at the pros and cons of using photocatalysis as an efficient AOP to degrade dye-containing wastewater. Full article
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