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Photoinduced Degradation of Environmental Pollutants in the Presence of O2-Free Ozone

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Published/Copyright: January 26, 2017
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Journal of Advanced Oxidation Technologies
From the journal Journal of Advanced Oxidation Technologies Volume 2 Issue 3

Abstract

Photoinduced degradation of anthracene, perylene, phenanthrene, pyrene, and potassium ferricyanide in water were monitored spectroscopically. Three types of gas stream (ozone/nitrogen, oxygen/nitrogen, and ozoneoxygen/ nitrogen) were used to supply oxidants to the aqueous solutions. The use of an O2-free ozone/nitrogen gas stream allows the elucidation of the role of ozone in the degradation process without possible complications from oxygen. A light source of λ > 300 nm was employed to excite the aromatic compounds or ferricyanide exclusively without inducing photodecomposition of ozone. The relevance of the excited species of PAHs and ferricyanide in their own degradation thus can be examined. The measured degradation rate constants under these conditions support that the interaction between the excited states of PAHs or ferricyanide and ozone plays a role in their photoinduced decomposition.

Received: 1996-12-16
Accepted: 1997-7-8
Published Online: 2017-1-26
Published in Print: 1997-7-1

© 2017 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. Masthead
  2. Contents
  3. Preface
  4. Editorial
  5. Research Articles
  6. Integration of Chemical and Biological Oxidation Processes for Water Treatment: II. Recent Illustrations and Experiences
  7. Treatment of VX Hydrolysate with Ultraviolet Light and Hydrogen Peroxide
  8. Influence of Natural Organic Matter on Oxidation of Volatile Organic Compounds by the H2O2/VisUV Process
  9. Photoinduced Degradation of Environmental Pollutants in the Presence of O2-Free Ozone
  10. A Comparison of Acetophenone Photooxidation in Aqueous Media Via Direct Photolysis and TiO2 Photocatalysis
  11. Application of Advanced Oxidation Process Technologies to Extremely High TOC Containing Aqueous Solutions
  12. Kinetic Modeling for Process Optimization During the Free-Radical Treatment of Nitro Compounds in Aqueous Solution
  13. Combination of UV Oxidation with Other Treatment Technologies for the Remediation of Contaminated Water
  14. UV/H2O2 Degradation and Toxicity Reduction of Textile Azo Dyes: Remazol Black-B, a Case Study
https://doi.org/10.1515/jaots-1997-0307

Articles in the same Issue

  1. Masthead
  2. Contents
  3. Preface
  4. Editorial
  5. Research Articles
  6. Integration of Chemical and Biological Oxidation Processes for Water Treatment: II. Recent Illustrations and Experiences
  7. Treatment of VX Hydrolysate with Ultraviolet Light and Hydrogen Peroxide
  8. Influence of Natural Organic Matter on Oxidation of Volatile Organic Compounds by the H2O2/VisUV Process
  9. Photoinduced Degradation of Environmental Pollutants in the Presence of O2-Free Ozone
  10. A Comparison of Acetophenone Photooxidation in Aqueous Media Via Direct Photolysis and TiO2 Photocatalysis
  11. Application of Advanced Oxidation Process Technologies to Extremely High TOC Containing Aqueous Solutions
  12. Kinetic Modeling for Process Optimization During the Free-Radical Treatment of Nitro Compounds in Aqueous Solution
  13. Combination of UV Oxidation with Other Treatment Technologies for the Remediation of Contaminated Water
  14. UV/H2O2 Degradation and Toxicity Reduction of Textile Azo Dyes: Remazol Black-B, a Case Study
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