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Formation of Reactive Species Enhanced by H2O2 Addition in the Photodecomposition of N-Nitrosodimethylamine (NDMA)
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  • Journal title : Environmental Engineering Research
  • Volume 18, Issue 1,  2013, pp.29-35
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2013.18.1.029
 Title & Authors
Formation of Reactive Species Enhanced by H2O2 Addition in the Photodecomposition of N-Nitrosodimethylamine (NDMA)
Kwon, Bum Gun; Kim, Jong-Oh; Kwon, Joong-Keun;
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 Abstract
This study noted that the actual mechanism of N-nitrosodimethylamine (NDMA) photodecomposition in the presence of is missing from the previous works. This study investigated a key unknown reactive species (URS) enhanced by the addition of during the photolysis of NDMA with , not hydroxyl radicals. In order to provide experimental evidences in support of URS formation, we have mainly used p-nitrosodimethylaniline, methanol, and benzoic acid as well-known probes of in this study. Both loss of PNDA and formation of hydroxybenzoic acids were dependent on NDMA concentrations during the photolysis in a constant concentration of . In particular, competition kinetics showed that the relative reactivity of an URS was at least identical with -like reactivity. In addition, the decay of NDMA was estimated to be about 65% by the direct UV light and about 35% by the reactive species or URS generated through the photolysis of NDMA and . Therefore, our data suggest that a highly oxidizing URS is formed in the photolysis of NDMA with , which could be peroxynitrite () as a potent oxidant by itself as well as a source of .
 Keywords
;NDMA;Nitric oxide;Superoxide anion radical;Peroxynitrite;
 Language
English
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