Fenton oxidation of 2,4- and 2,6-dinitrotoluene and acetone inhibition

  • Yiliang He
  • Bin Zhao
  • Joseph B. Hughes
  • Sung Soo Han
Research Article

Abstract

The performances and kinetic parameters of Fenton oxidation of 2,4- and 2,6-dinitrotoluene (DNT) in water-acetone mixtures and explosive contaminated soil washing-out solutions were investigated at a laboratory scale. The experimental results show that acetone can be a significant hydroxyl radical scavenger and result in serious inhibition of Fenton oxidation of 2,4- and 2,6-DNT. Although no serious inhibition was found in contaminated soil washing-out solutions, longer reaction time was needed to remove 2,4- and 2,6-DNT completely, mainly due to the competition of hydroxyl radicals. Fenton oxidation of 2,4- and 2,6-DNT fit well with the first-order kinetics and the presence of acetone also reduced DNT’s degradation kinetics. Based on the comparison and matching of retention time and ultraviolet (UV) spectra between high performance liquid chromatography (HPLC) and standards, the following reaction pathway for 2,4-DNT primary degradation was proposed: 2,4-DNT → 2,4-dinitro-benzaldehyde → 2,4-dinitrobenzoic acid → 1,3-dinitrobenzene → 3-nitrophenol.

Keywords

dinitrotoluenes Fenton oxidation acetone inhibition degradation kinetic reaction pathway 

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Copyright information

© Higher Education Press 2008

Authors and Affiliations

  • Yiliang He
    • 1
  • Bin Zhao
    • 1
  • Joseph B. Hughes
    • 2
  • Sung Soo Han
    • 2
  1. 1.School of Environmental Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlantaUSA

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