Kinetic Modeling of Free-Radical Water Treatment Processes: Pitfalls, Practicality, and the Extension of the Hoigné/ Bader/ Staehelin Model
Abstract
The chemistry involved in free-radical water treatment processes (AOPs) is sufficiently complex that true optimization of the processes is often difficult without the use of kinetic models to allow simulation of the treatment process and optimization via “computer experiments.” Powerful software is now widely available for numerical integration of complex sets of rate equations, such as are encountered in simulations of water treatment using AOPs. However, limited availability of the required rate constants poses a serious barrier to performing meaningful calculations. This problem cannot, in general, be solved by simply using rate constants as optimization parameters in a fit of the experimental data to the chosen equation set. A simpler “semi-empirical” model based on the concept of efficiency was developed, using the work of Hoigne, Bader, and Staehelin during the period 1977-1985 as a starting point. This model was shown to be useful in AOP process optimization, by allowing the identification of reaction steps for which the efficiency can be improved, evaluation of "generic" hydroxyl radical rate constants for complex environmental matrices, and determination of the importance of reactive species other than hydroxyl radical.
© 2017 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Titelei
- Contents
- Editorial
- Feature Article
- Kinetic Modeling of Free-Radical Water Treatment Processes: Pitfalls, Practicality, and the Extension of the Hoigné/ Bader/ Staehelin Model
- Research Articles
- Oxidative Degradation and Fluorescence of a Non-biodegradable Brightener via Titania Suspensions: Implications for the Natural Cycle
- Free Radicals Generated in Photocatalytic Oxidation of Some Amines and Diamines
- Electron Beam Treatment of Flue Gas with High Content of SO2
- SO2 Oxidation by Simultaneous Application of Electron Beam and Electric Field in Humid Air
- Study at 20 kHz and 500 kHz of the Ultrasound-Ozone Advanced Oxidation System : 4-Nitrophenol Degradation
- Sunlight Induced Decoloration/Degradation of Non-Biodegradable Orange II Dye by Advanced Oxidation Technologies in Homogeneous and Heterogeneous Media
- Quantum Yields for the Photodegradation of Pollutants in Dilute Aqueous Solution: Phenol, 4-Chlorophenol and N-Nitrosodimethylamine
- Detoxification and Desilvering of Photographic Processing Effluents by an Alternative Technology: Photocatalysis at Semiconductor/Solution Interfaces
Articles in the same Issue
- Titelei
- Contents
- Editorial
- Feature Article
- Kinetic Modeling of Free-Radical Water Treatment Processes: Pitfalls, Practicality, and the Extension of the Hoigné/ Bader/ Staehelin Model
- Research Articles
- Oxidative Degradation and Fluorescence of a Non-biodegradable Brightener via Titania Suspensions: Implications for the Natural Cycle
- Free Radicals Generated in Photocatalytic Oxidation of Some Amines and Diamines
- Electron Beam Treatment of Flue Gas with High Content of SO2
- SO2 Oxidation by Simultaneous Application of Electron Beam and Electric Field in Humid Air
- Study at 20 kHz and 500 kHz of the Ultrasound-Ozone Advanced Oxidation System : 4-Nitrophenol Degradation
- Sunlight Induced Decoloration/Degradation of Non-Biodegradable Orange II Dye by Advanced Oxidation Technologies in Homogeneous and Heterogeneous Media
- Quantum Yields for the Photodegradation of Pollutants in Dilute Aqueous Solution: Phenol, 4-Chlorophenol and N-Nitrosodimethylamine
- Detoxification and Desilvering of Photographic Processing Effluents by an Alternative Technology: Photocatalysis at Semiconductor/Solution Interfaces
