Degradation of nitrogen containing organic compounds by combined photocatalysis and ozonation.
The combination of TiO2-assisted photocatalysis and ozonation in the degradation of nitrogen-containing substrates such as alkylamines, alkanolamines, heterocyclic and aromatic N-compounds has been investigated. A laboratory set-up was designed and the influence of the structure of the N-compound, the TiO2 and ozone concentration on the formation of breakdown products were examined. The experimental results showed that a considerable increase in the degradation efficiency of the N-compounds is obtained by a combination of photocatalysis and ozonation as compared to either ozonation or photocatalysis only. The mineralization of the model substances was monitored by measurements of the TOC and ion-chromatographic determinations of the formed NO2- and NO3-. The temporal changes of concentrations of breakdown products, such as NH4+, short chain alkyl- and alkanolamines were determined by single column ion chromatography (SCIC) and as well as by electrospray mass spectrometry (EI-MS).
Klare
M
M
University of Dortmund, Department of Chemistry, Germany.
Waldner
G
G
Bauer
R
R
Jacobs
H
H
Broekaert
J A
JA
D001673:Biodegradation, Environmental; D002384:Catalysis; D009584:Nitrogen / Q000493:pharmacokinetics*; D009930:Organic Chemicals / Q000493:pharmacokinetics*; D010126:Ozone / Q000378:metabolism; D010777:Photochemistry; D014025:Titanium; D014865:Waste Disposal, Fluid / Q000379:methods*
D009930:Organic Chemicals; C009495:titanium dioxide; D010126:Ozone; D014025:Titanium; D009584:Nitrogen