Special Issue "Photocatalytic Wastewater Treatment"
Deadline for manuscript submissions: closed (15 April 2016)
Prof. Dr. Dionysios (Dion) Demetriou Dionysiou
Department of Biomedical, Chemical and Environmental Engineering (DBCEE), University of Cincinnati, Cincinnati, OH 45221-0012, USA
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Interests: advanced oxidation technologies and chemical oxidation for water treatment; drinking water treatment and purification; environmental nanotechnology; transition-metal oxidation and reverse electron transfer reactions; the use of ionic liquids in environmental applications; destruction of biological toxins in water; physicochemical phenomena on particle-water interfaces
Dr. Polycarpos Falaras
Institute Nanoscience and Nanotechnology (INN), National Center for Scientific Research "Demokritos", 15341 Aghia Paraskevi Attikis, Athens, Greece
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Interests: titanium dioxide nanostructures; dyes; perovskites; photocatalysrts; water pollutants degradation; solar cells
Dr. Suresh C. Pillai
Centre for Precision Engineering, Materials and Manufacturing Research &Nanotechnology Research Group, Department of Environmental Science,Institute of Technology Sligo, Ash Lane, Sligo, Ireland
Dr. Adrián M.T. Silva
Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Interests: water and wastewater treatment, desalination and reuse; advanced oxidation technologies; membrane technology; environmental monitoring
Photocatalytic processes have shown great potential in recent years as environmentally friendly and sustainable treatment technologies to align with the “zero” waste scheme in the wastewater industry. At present, the main technical barriers that prevent their commercialisation remain: a) the costs associated with the UV source capital, b) the post-recovery of the catalysts after water treatment, and c) the efficiency of the photocatalytic treatment process, especially for new emerging/recalcitrant pollutants.
In order to meet and solve these technical challenges, research efforts have been focused on the development of catalysts with a broader range of light absorption for better utilization of sunlight and its integration through nanostructured films on different supports in integrated photocatalytic reactor systems (e.g., membrane-photocatalytic reactors which could combine two treatments, photocatalysis and filtration, in one unit). To date, several methods for achieving visible-light-driven photocatalysis or for increasing the lifetime of the photoproduced electron-hole pairs are widely investigated. These include modification of TiO2, the most popular photocatalyst, and several other commercially available nanocrystalline semiconductors (e.g., ZnO or CuO) by various metal ions or non-metallic species (N, C, S, B, P, F, or I), as well as by combination of these semiconductors with carbon materials. However, the stability and long-term efficacy of these alternative photocatalysts have not been tested. In terms of integration of these nanostructured photocatalytic films on membranes, research is still in its beginning and a great deal remains to be done. Judicious engineering of the semiconductor nanostructured materials may significantly enhance the development of a green, cost effective, and efficient technology for the removal of contaminants of emerging concern.
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- Synthesis, characterisation and test applications of catalysts in Advanced Oxidation and Reduction Processes (AOPs, AORs) for the removal of emerging contaminants
- Applications of photocatalytic processes in disinfection treatments
- New generation photocatalysts for decontamination and disinfection applications
- Operation mechanism clarification(s)
- Process engineering (including modeling) for up-scaling materials and devices (photoreactors)
- Green chemistry considerations for the development and application of photocatalytic processes in water and wastewater treatment
- Economics of the photocatalytic technologies in water and wastewater remediation
- Fate of catalysts in wastewater treatment plants
- Challenges around the development of photocatalysis for beneficial ends in water/wastewater treatment