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

Ozone: Science and Engineering

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Abstract

Hydrophobic organic acids (combined humic and fulvic acids), obtained from an Antarctic Lake with predominantly microbially derived organic carbon sources and two US fiver 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.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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Ozone-induced changes in natural organic matter (NOM) structure
Series title:
Ozone: Science and Engineering
Volume
21
Issue:
6
Year Published:
1999
Language:
English
Publisher:
CRC Press LLC
Publisher location:
Boca Raton, FL, United States
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Ozone: Science and Engineering
First page:
551
Last page:
570
Number of Pages:
20