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Reaction mechanisms of DNT with hydroxyl radicals for advanced oxidation processes-a DFT study.

Abstract：

:In advanced oxidation processes (AOPs), the detailed degradation mechanisms of a typical explosive of 2,4-dinitrotoluene (DNT) can be investigated by the density function theory (DFT) method at the SMD/M062X/6-311+G(d) level. Several possible degradation routes for DNT were explored in the current study. The results show that, for oxidation of the methyl group, the dominant degradation mechanism of DNT by hydroxyl radicals (•OH) is a series of sequential H-abstraction reactions, and the intermediates obtained are in good agreement with experimental findings. The highest activation energy barrier is less than 20 kcal mol-1. Other routes are dominated by an addition-elimination mechanism, which is also found in 2,4,6-trinitrotoluene, although the experiment did not find the corresponding products. In addition, we also eliminate several impossible mechanisms, such as dehydration, HNO3 elimination, the simultaneous addition of two •OH radials, and so on. The information gained about these degradation pathways is helpful in elucidating the detailed reaction mechanism between nitroaromatic explosives and hydroxyl radicals for AOPs. Graphical Abstract The degradation mechanism of an important explosive, 2,6-dinitrotoluene (DNT), by the hydroxyl radical for advanced oxidation progresses.

journal_name

J Mol Model

journal_title

Journal of molecular modeling

authors

Zhou Y,Yang Z,Yang H,Zhang C,Liu X

doi

10.1007/s00894-017-3277-0

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

139

issue

4

eissn

1610-2940

issn

0948-5023

pii

10.1007/s00894-017-3277-0

journal_volume

23

pub_type

杂志文章

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