Ozone-induced changes in natural organic matter (NOM) structure

Paul Westerhoff, Jean Debroux, George Aiken, Gary Amy

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


Hydrophobic organic acids (combined humic and fulvic acids), obtained from an Antarctic Lake with predominantly microbially derived organic carbon sources and two US river systems with terrestrial organic carbon sources, were ozonated. Several analyses, including 13C-NMR, UV absorbance, fluorescence, hydrophobic/transphilic classification, and potentiometric titrations, were performed before and after ozonation. Ozonation reduced aromatic carbon content, selectively reducing phenolic carbon content. Ozonation of the samples resulted in increased aliphatic, carboxyl, plus acetal and ketal anomeric carbon content and shifted towards less hydrophobic compounds.

Original languageEnglish (US)
Pages (from-to)551-570
Number of pages20
JournalOzone: Science and Engineering
Issue number6
StatePublished - Jan 1 1999


  • Anomeric Carbon
  • Aromatic Carbon
  • C-NMR Spectroscopy
  • Carboxyl Carbon
  • Drinking Water Treatment
  • Fulvic Acids
  • Humic Acids
  • Natural Organic Matter (NOM)
  • Ozone
  • Potentiometric Titrations

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry


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