Figures-of-Merit for Advanced Oxidation Technologies: A Comparison of Homogeneous UV/H2O2, Heterogeneous UV/TiO2 and Electron Beam Processes
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James R. Bolton
Abstract
Three Advanced Oxidation Technologies (UV/H2O2, UV/TiO2 and Electron Beam) have been evaluated using the Electrical Energy per Order (EE/O) figure-of-merit. These processes have been tested on two aqueous treatment systems: the bleaching of methylene blue and the decay of phenol. In general, as expected, for a given process, the EE/O increased as the concentration of the contaminant increased. However, when the three processes were compared for the same system at the same concentration, the EE/Os for the UV/H2O2 and Electron Beam processes were very similar, but the EE/O for the UV/TiO2 was much higher than that for the other two processes. The UV/H2O2 process has the disadvantage that there is an added cost of chemicals (principally H2O2) and the E-beam process has the disadvantage that there is a constant power required to run the apparatus even when the beam is off. Nevertheless, the UV/TiO2 system has an inferior performance relative to the other two processes; the principal reason is probably the low quantum yield (~0.04-0.08) for the generation of hydroxyl radicals on the surface of TiO2 particles.
© 2017 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Masthead
- Contents
- Preface
- Editorial
- Research Articles
- Activity, and Hardness of Supported TiO2 Films on Pyrex and Soda-Lime Glass in Photocatalytic Degradation of Formic Acid for 50 Days
- Endurance Test of TiO2-Based Photocatalytic Oxidation
- Photocatalytic Inactivation of Different Bacteria and Bacteriophages in Drinking Water at Different TiO2 Concentration With or Without Exposure to O2
- Solar Photochemical Detoxification and Disinfection for Water Treatment in Tropical Developing Countries
- Photodegradation of Phenol in Water using Silica-Supported Titania Catalysts
- Photocatalytic Decomposition of Chlorinated Benzaldehydes in Aqueous Solution Using TiO2
- Photocatalytic Reduction and Removal of Uranium From a Uranium- EDTA Solution
- Figures-of-Merit for Advanced Oxidation Technologies: A Comparison of Homogeneous UV/H2O2, Heterogeneous UV/TiO2 and Electron Beam Processes
- Gas-Phase Destruction of VOCs Using TiO2/UV and TiO2/O3/UV
- Mass Transfer Considerations in the Design of Vapor-Phase photocatalytic Reactors
- A Simple Kinetic Model for the Simultaneous Concentration and Intensity Dependencies of TCE Photocatalyzed Destruction
Articles in the same Issue
- Masthead
- Contents
- Preface
- Editorial
- Research Articles
- Activity, and Hardness of Supported TiO2 Films on Pyrex and Soda-Lime Glass in Photocatalytic Degradation of Formic Acid for 50 Days
- Endurance Test of TiO2-Based Photocatalytic Oxidation
- Photocatalytic Inactivation of Different Bacteria and Bacteriophages in Drinking Water at Different TiO2 Concentration With or Without Exposure to O2
- Solar Photochemical Detoxification and Disinfection for Water Treatment in Tropical Developing Countries
- Photodegradation of Phenol in Water using Silica-Supported Titania Catalysts
- Photocatalytic Decomposition of Chlorinated Benzaldehydes in Aqueous Solution Using TiO2
- Photocatalytic Reduction and Removal of Uranium From a Uranium- EDTA Solution
- Figures-of-Merit for Advanced Oxidation Technologies: A Comparison of Homogeneous UV/H2O2, Heterogeneous UV/TiO2 and Electron Beam Processes
- Gas-Phase Destruction of VOCs Using TiO2/UV and TiO2/O3/UV
- Mass Transfer Considerations in the Design of Vapor-Phase photocatalytic Reactors
- A Simple Kinetic Model for the Simultaneous Concentration and Intensity Dependencies of TCE Photocatalyzed Destruction
