Nitrotoluene destruction by UV-catalyzed Fenton oxidation

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.

Original languageEnglish (US)
Pages (from-to)1849-1865
Number of pages17
JournalChemosphere
Volume36
Issue number8
DOIs
StatePublished - Apr 1 1998

Fingerprint

Trinitrotoluene
2,6-dinitrotoluene
oxidation
Oxidation
2,4-dinitrotoluene
trinitrotoluene
Soil
Humic Substances
Soils
fulvic acid
humic acid
substitution
Substitution reactions
aqueous solution
Water
Acids

Keywords

  • Dissolved organic matter
  • Fenton oxidation
  • Nitrotoluene
  • Remediation
  • Ultraviolet light

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Nitrotoluene destruction by UV-catalyzed Fenton oxidation. / Li, Z. M.; Shea, Patrick J; Comfort, Steven.

In: Chemosphere, Vol. 36, No. 8, 01.04.1998, p. 1849-1865.

Research output: Contribution to journalArticle

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N2 - The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.

AB - The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.

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