Degradation of p-nitrotoluene by O3/H2O2 process and oxidation mechanism

被引：0

作者：

于颖慧 ^{[1
,2
]}

马军 ^{[1
]}

侯艳君 ^{[1
,2
]}

高金胜 ^{[1
,2
]}

机构：

[1] School of Municipal and Environmental Engineering,Harbin Institute of Technology

[2] School of Chemistry and Materials Science,Heilongjiang University

来源：

Journal of Harbin Institute of Technology(New series) | 2009年 / 16卷 / 01期

基金：

中国国家自然科学基金;

关键词：

p-nitrotoluene; ozone; hydrogen peroxide; advanced oxidation processes;

D O I：

暂无

中图分类号：

X132 [环境分析化学];

学科分类号：

083001 ;

摘要：

The degradation of p-nitrotoluene by O3/H2O2 process in a bubble contact column was investigated. Effects of the molar ratio of hydrogen peroxide to ozone,pH value and t-butanol on the oxidation process were discussed. It was found that the proper H2O2/O3 molar ratio for the degradation of p-nitrotoluene was around 0.6, different pH values and the presence of t-butanol highly influenced the removal efficiency of p-nitrotoluene. 5-methyl-2-nitrophenol, 2-methyl-5-nitrophenol, (4-nitrophenyl) methanol, 5-(hydroxymethyl)-2-nitro phenol, acetic acid, 2-methylpropane diacid and 2-(hydroxylmethyl)propane diacid were identified as degradation intermediates and products through GC-MS. Radical reaction mechanism and degradation pathway were proposed based on the results of experiments. It is deduced that the benzene ring of p-nitrotoluene can be only destroyed by hydroxyl radicals through a polyhydroxy intermediate pathway. Then unstable polyhydroxy intermediates can be oxidized to different acids with low molecular weight rapidly.

引用

页码：115 / 120

页数：6