Could NOx be released during mineralization of pollutants containing nitrogen by hydroxyl radical? Ascertaining the release of N-volatile species

Sergio GARCIA SEGURA, Ehab Mostafa, Helmut Baltruschat

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Advanced oxidation processes emerged as highly promising water treatment technologies for the abatement of organic pollutants in waters. The treatment of N-containing aromatic pollutants such as amines and nitro-derivatives is of great relevance due to their carcinogenicity. However, one of the major questions is the possible release of NOxspecies from the oxidation of these pollutants by [rad]OH. The evolution of these hazardous NOxduring the water treatments by [rad]OH has been suggested to explain the loss of nitrogen during the mass balances, but unfortunately this hypothesis has not been demonstrated experimentally. In this work, the release of NOxhas been ascertained and the overall current efficiency of conversion of N-containing pollutants to CO2and NOxwas estimated semi-quantitatively using differential electrochemistry mass spectroscopy (DEMS) during electrochemical advanced oxidation process with boron-doped diamond (BDD) anodes. Moreover, the relationship between the distributions of N-volatile species with the nitrogenized functional group of each pollutant has been highlighted.

Original languageEnglish (US)
Pages (from-to)376-384
Number of pages9
JournalApplied Catalysis B: Environmental
Volume207
DOIs
StatePublished - Jan 1 2017
Externally publishedYes

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Keywords

  • Boron-doped diamond anodes (BDD)
  • Contaminants of emerging concern
  • Differential electrochemical mass spectroscopy (DEMS)
  • Electrochemical oxidation (EO)
  • Water treatment

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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