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

HE Yiliang1, ZHAO Bin1, HUGHES Joseph B.2, HAN Sung Soo2

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PDF(266 KB)
Front. Environ. Sci. Eng. ›› 2008, Vol. 2 ›› Issue (3) : 326-332. DOI: 10.1007/s11783-008-0038-4

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

  • HE Yiliang1, ZHAO Bin1, HUGHES Joseph B.2, HAN Sung Soo2
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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.

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HE Yiliang, ZHAO Bin, HUGHES Joseph B., HAN Sung Soo. Fenton oxidation of 2,4- and 2,6-dinitrotoluene and acetone inhibition. Front.Environ.Sci.Eng., 2008, 2(3): 326‒332 https://doi.org/10.1007/s11783-008-0038-4

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