Hybrid Advanced Oxidation Processes (AOPs): Recent Developments and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: 20 September 2024 | Viewed by 1155

Special Issue Editors

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Department of Physical Chemistry, Institute of Nanoscience and Nanomaterials, NCSR “Demokritos”, 15310 Agia Paraskevi, Athens, Greece
Interests: advanced oxidation processes (AOPs); hybrid processes; synergy; Fenton and Fenton-like processes; photo-Fenton processes; water treatment; wastewater treatment; photocatalysis; ozonation; remediation analytical chemistry; organic compound detection and structure elucidation using HRMS

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Guest Editor
Natural Resources and Renewable Energies Laboratory (NRRE), Centre for Research and Technology, Hellas (CERTH), Chemical Process Engineering Research Institute (CPERI), 6th km Charilaou-Thermi Road, P.O. Box 60361, 57001 Thessaloniki, Greece
Interests: pressure-driven membrane processes; electrodialysis; photo- and electro-driven advanced oxidation processes (AOPs); hybrid AOPs with membrane processes; adsorption processes; water and wastewater treatment; water reuse
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: synthesis and characterization of novel multifunctional nanocomposites; application of active phases to textiles/fabrics; (photo)catalytic detoxification of chemical warfare agent vapors or droplets; adsorption of organic compounds from liquid phases; photo- and chemo-catalytic valorization/oxidation of biomass-obtained model compounds; desulfurization of biofuels; colorimetric detection of toxic vapors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Environmental pollution is a major area of concern due to its impact on living organisms, both directly and indirectly. Among the various approaches for (waste)water treatment, the ones based on catalytic advanced oxidation processes (AOPs) are increasingly being used against persistent organic pollutants such as pesticides, dye chemicals, drugs, etc. These processes are also successfully used as a pre-treatment in order to reduce the concentration of toxic compounds that inhibit biological processes of water purification. AOPs are based on the generation of highly reactive radical species, most commonly hydroxyl radicals (HO).

Recent advantages in the field of oxidative processes have shown that AOPs can be successfully combined with other conventional or advanced treatment techniques to achieve higher degradation efficiency, less energy consumption and generally better performance, whilst solving major limitations and drawbacks exhibited during the application of individual AOPs through the exploitation of synergistic effects.

This Special Issue aims to cover the most recent developments and applications of hybrid AOPs for the remediation of persistent organic pollutants through sustainable strategies that combine physical, chemical and/or biological treatment processes.

The Special Issue welcomes contributions on one or more of the following topics:

  • Synthesis and characterization of innovative (nano)materials;
  • Mechanistic investigation of involved reactions;
  • Reactor designs, process development and applications.

Dr. Christophoros Christophoridis
Dr. Konstantinos V. Plakas
Dr. Dimitrios Giannakoudakis
Guest Editors

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  • water treatment
  • wastewater treatment
  • advanced oxidation processes (AOPs)
  • hybrid processes
  • synergy
  • Fenton and Fenton-like processes
  • photo-Fenton and electro-Fenton processes
  • photocatalysis
  • ozonation
  • wet oxidation
  • bioremediation
  • membrane processes
  • adsorption processes
  • degradation
  • organic pollutants
  • transformation products

Published Papers (1 paper)

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17 pages, 6412 KiB  
Enhancing the Photocatalytic Activity of Immobilized TiO2 Using Laser-Micropatterned Surfaces
by Theodoros Giannakis, Sevasti-Kiriaki Zervou, Theodoros M. Triantis, Christophoros Christophoridis, Erasmia Bizani, Sergey V. Starinskiy, Panagiota Koralli, Georgios Mousdis, Anastasia Hiskia and Maria Kandyla
Appl. Sci. 2024, 14(7), 3033; https://doi.org/10.3390/app14073033 - 04 Apr 2024
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In the past, the application of TiO2 slurry reactors has faced difficulties concerning the recovery and reusability of the catalyst. In response to these challenges, immobilized photocatalyst systems have been investigated, wherein the catalyst is fixed onto a solid support, frequently with [...] Read more.
In the past, the application of TiO2 slurry reactors has faced difficulties concerning the recovery and reusability of the catalyst. In response to these challenges, immobilized photocatalyst systems have been investigated, wherein the catalyst is fixed onto a solid support, frequently with reduced photocatalytic performance. In the present study, thin TiO2 films were developed in the anatase phase by the sol-gel process and spin-cast on laser-microstructured silicon substrates, to form photocatalytic surfaces of increased activity. The TiO2 films were thoroughly characterized using SEM-EDX, XRD, UV–Vis spectroscopy, and Raman spectroscopy. The photocatalytic activity of these surfaces was evaluated by the degradation of atrazine in aqueous solution under UV irradiation. Their photocatalytic activity was found to be significantly enhanced (mean kobs 24.1 × 10−3 min−1) when they are deposited on laser-microstructured silicon compared with flat silicon (mean kobs 4.9 × 10−3 min−1), approaching the photocatalytic activity of sol-gel TiO2 fortified with Degussa P25, used as a reference material (mean kobs 32.7 × 10−3 min−1). During the photocatalytic process, several transformation products (TPs) of atrazine, namely 2-chloro-4-(isopropylamino)-6-amino-s-triazine (CIAT), 2-chloro-4-amino-6-(ethylamino)-s-triazine (CAET), and 2-chloro-4.6-diamino-s-triazine (CAAT), were identified with LC–MS/MS. The stability of the photocatalytic surfaces was also investigated and remained unchanged through multiple cycles of usage. The surfaces were further tested with two other pollutants, i.e., 2,4,6-trichlorophenol and bisphenol-a, showing similar photocatalytic activity as with atrazine. Full article
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