Photodegradation of Surfactants XVII Photo-oxidation Processes in Amphoteric Surfactants Catalyzed by Irradiated TiO2 Suspensions
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Hisao Hidaka
Abstract
Differences in photocatalytic degradations arising from oxidative cleavage of a peptide bond and a quaternary nitrogen moiety in a TiO2-illuminated suspension are described to elucidate the routes to mineralization of two amphoteric stufactants and one nonionic surfactant, namely, sodium N′-dodecylamidopropyl-N, N-dimethyl ammonium acetate (C12-amidobetaine), sodium N′-dodecyl-N, N-dimethyl ammonium acetate (C12-betaine) and dodecanoyl-(2-hydroxyethyl) amide (N-DHA). The resulting intermediates from the oxidative cleavage were identified by NMR and GC-MS analysis. The dependence of rates of formation of NH4+ and NO3-ions on the structure of surfactants was also investigated. The temporal mineralization yield was monitored by CO2 evolution and by total organic carbon content (TOC) in the photodegraded solution. The peroxide value (POV) of the photo-oxidized intermediates was determined. A photomineralization mechanism implicating the peptide bond and die quaternary nitrogen moiety is proposed.
© 2017 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Titelei
- Inhalt
- Editorial
- Editorial policy
- Feature Articles
- Figures-of-Merit for the Technical Development and Application of Advanced Oxidation Processes
- The Use of Iron in Advanced Oxidation Processes
- Research Articles
- Photodegradation of Surfactants XVII Photo-oxidation Processes in Amphoteric Surfactants Catalyzed by Irradiated TiO2 Suspensions
- Mechanisms of Photocatalysis: The Reductive Degradation of Tetrachloromethane in Aqueous Titanium Dioxide Suspensions
- Generation Efficiency of the Hydroxyl Radical Adduct of the DMPO Spin Trap in Homogeneous and Heterogeneous Media
- The GC-MS Analysis of Organic Intermediates from the TiO2 Photocatalytic Treatment of Water Contaminated by Lindane (1α,2α,3/3,4α,5α,6β- hexachlorocyclohexane)+
- Investigation and Properties of the Discharge in Dielectric Barrier Reactors Decomposition of Toluene, o-Xylene, Trichloroethylene, and Their Mixture Using a BaTiO3 Packed-Bed Plasma Reactor
- Decomposition of Toluene, o-Xylene, Trichloroethylene, and Their Mixture Using a BaTiO3 Packed-Bed Plasma Reactor
- Plasma Assisted Oxidation of Propene
- Efficient Visible Light Induced Degradation of the Brightener Tinopal CBS-X. Accelerated Bacterial Adsorption Observed after Photocatalytic Pretreatment
- Abiotic Oxidative Degradation of Atrazine on Zero-Valent Iron Activated by Visible Light
Articles in the same Issue
- Titelei
- Inhalt
- Editorial
- Editorial policy
- Feature Articles
- Figures-of-Merit for the Technical Development and Application of Advanced Oxidation Processes
- The Use of Iron in Advanced Oxidation Processes
- Research Articles
- Photodegradation of Surfactants XVII Photo-oxidation Processes in Amphoteric Surfactants Catalyzed by Irradiated TiO2 Suspensions
- Mechanisms of Photocatalysis: The Reductive Degradation of Tetrachloromethane in Aqueous Titanium Dioxide Suspensions
- Generation Efficiency of the Hydroxyl Radical Adduct of the DMPO Spin Trap in Homogeneous and Heterogeneous Media
- The GC-MS Analysis of Organic Intermediates from the TiO2 Photocatalytic Treatment of Water Contaminated by Lindane (1α,2α,3/3,4α,5α,6β- hexachlorocyclohexane)+
- Investigation and Properties of the Discharge in Dielectric Barrier Reactors Decomposition of Toluene, o-Xylene, Trichloroethylene, and Their Mixture Using a BaTiO3 Packed-Bed Plasma Reactor
- Decomposition of Toluene, o-Xylene, Trichloroethylene, and Their Mixture Using a BaTiO3 Packed-Bed Plasma Reactor
- Plasma Assisted Oxidation of Propene
- Efficient Visible Light Induced Degradation of the Brightener Tinopal CBS-X. Accelerated Bacterial Adsorption Observed after Photocatalytic Pretreatment
- Abiotic Oxidative Degradation of Atrazine on Zero-Valent Iron Activated by Visible Light
