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Photosensitized Chlorobenzene Degradation by UV/H2O2 Oxidation
-
Tatiana Oncescu
,
Petruta Oancea
Veröffentlicht/Copyright:
8. Dezember 2016
Abstract
The degradation of chlorobenzene (CB) in UV/H2O2 system in aqueous solution, at pH 7, was studied. CB degradation was monitored by gas chromatography, Cl- liberation was monitored by ion chromatography at various irradiation times and a pseudo-first order kinetic in respect to both components was found. The rate constant kCl- was lower than kCB, which suggests that chlorinated intermediates are firstly formed by the attack of •OH radicals on CB, followed by chlorine liberation. When the CB concentration was kept constant we found a linear increase in the rate constants with H2O2 concentration, followed by a short interval with unmodified kI values and a decrease at higher H2O2 concentration. The variation of CB concentration at constant ratio [H2O2]/ [CB] led to the decrease in the degradation efficiency due to the competition with the intermediates, for •OH radicals consumption. Our kinetic results agreed with the literature information on the CB degradation mechanism.
Received: 2007-9-4
Revised: 2007-11-5
Accepted: 2007-11-6
Published Online: 2016-12-8
Published in Print: 2008-1-1
© 2016 by Walter de Gruyter Berlin/Boston
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Artikel in diesem Heft
- Preface
- An Integral Degradation Model to Describe H2O2-Photooxidation of Linear Alkylbenzenesulfonate (LAS) Surfactants
- Characterization of the Radical Oxidative Level in the Degradation of Phenolic Compounds with H2O2/UV
- Photocatalytic Decolorization of Methylene Blue with Two Photoreactors
- Determination of Quantum Yield in a Heterogeneous Photocatalytic System Using a Fitting-Parameters Model
- Evaluation of Zinc Oxide-Based Photocatalytic Degradation of a Commercial Pesticide
- Photocatalytic Activity of W-Doped TiO2 Nanopowders
- Catalytic Wet Peroxide Oxidation Process for the Continuous Treatment of Polluted Effluents on a Pilot Plant Scale
- Effect of Ultrasound on the Properties of Heterogeneous Catalysts for Sono-Fenton Oxidation Processes
- AOP in Water by Means of a DBD Conducted in a Coaxial Reactor
- Removal of Atrazine from Simulated Groundwater by AOTs
- Modelling Approach to Fenton and Photo-Fenton Treatments
- Chlorobenzene Degradation Assisted by TiO2 under UV Irradiation in Aqueous Solutions
- Optimization of Parameters for Hydrogen Production by Photocatalytic Alcohol Reforming in the Presence of Pt/TiO2 Nanocrystalline Thin Films
- Study on Bipolar Corona Discharge in Emitting Needle Electrode Configuration
- I-V Characteristics of Corona Discharge in Emitting Wire Electrode Configuration
- Micro-pore Ceramic Filter and UV System as Ballast Water Treatment: Preliminary Study on Chlorella Removal and Bacteria Inactivation
- Application of Box–Wilson Experimental Design Method for the Photocatalytic Degradation of Remazol Brilliant Blue R-A with Solar UV/TiO2/Fe(III) Processes
- Treatment of Industrial Cork Processing Water by Ozonation and Ozone Based Advanced Oxidation Processes (O3/UV and O3/H2O2) in a Bubble Column Reactor
- Chemo- and Regio-Selectivity in the TiO2-Mediated Photooxidation of 1,n-diols
- Photosensitized Chlorobenzene Degradation by UV/H2O2 Oxidation
- Influence of Solution Composition and Chemical Structure of Dye on Removal of Organic Dye by DC Diaphragm Discharge in Water solutions
- Photocatalytic Oxidation of Multi-Component Systems – An Investigation Using Toluene/Ethylbenzene, Octane/Decane/Dodecane and Formaldehyde/Acetaldehyde
Artikel in diesem Heft
- Preface
- An Integral Degradation Model to Describe H2O2-Photooxidation of Linear Alkylbenzenesulfonate (LAS) Surfactants
- Characterization of the Radical Oxidative Level in the Degradation of Phenolic Compounds with H2O2/UV
- Photocatalytic Decolorization of Methylene Blue with Two Photoreactors
- Determination of Quantum Yield in a Heterogeneous Photocatalytic System Using a Fitting-Parameters Model
- Evaluation of Zinc Oxide-Based Photocatalytic Degradation of a Commercial Pesticide
- Photocatalytic Activity of W-Doped TiO2 Nanopowders
- Catalytic Wet Peroxide Oxidation Process for the Continuous Treatment of Polluted Effluents on a Pilot Plant Scale
- Effect of Ultrasound on the Properties of Heterogeneous Catalysts for Sono-Fenton Oxidation Processes
- AOP in Water by Means of a DBD Conducted in a Coaxial Reactor
- Removal of Atrazine from Simulated Groundwater by AOTs
- Modelling Approach to Fenton and Photo-Fenton Treatments
- Chlorobenzene Degradation Assisted by TiO2 under UV Irradiation in Aqueous Solutions
- Optimization of Parameters for Hydrogen Production by Photocatalytic Alcohol Reforming in the Presence of Pt/TiO2 Nanocrystalline Thin Films
- Study on Bipolar Corona Discharge in Emitting Needle Electrode Configuration
- I-V Characteristics of Corona Discharge in Emitting Wire Electrode Configuration
- Micro-pore Ceramic Filter and UV System as Ballast Water Treatment: Preliminary Study on Chlorella Removal and Bacteria Inactivation
- Application of Box–Wilson Experimental Design Method for the Photocatalytic Degradation of Remazol Brilliant Blue R-A with Solar UV/TiO2/Fe(III) Processes
- Treatment of Industrial Cork Processing Water by Ozonation and Ozone Based Advanced Oxidation Processes (O3/UV and O3/H2O2) in a Bubble Column Reactor
- Chemo- and Regio-Selectivity in the TiO2-Mediated Photooxidation of 1,n-diols
- Photosensitized Chlorobenzene Degradation by UV/H2O2 Oxidation
- Influence of Solution Composition and Chemical Structure of Dye on Removal of Organic Dye by DC Diaphragm Discharge in Water solutions
- Photocatalytic Oxidation of Multi-Component Systems – An Investigation Using Toluene/Ethylbenzene, Octane/Decane/Dodecane and Formaldehyde/Acetaldehyde
