通过零价金属还原和化学氧化一步处理2,4-二硝基甲苯。

Single-step treatment of 2,4-dinitrotoluene via zero-valent metal reduction and chemical oxidation.

作者信息

Thomas J Mathew, Hernandez Rafael, Kuo Chiang-Hai

机构信息

Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, MS 39762, USA.

出版信息

J Hazard Mater. 2008 Jun 30;155(1-2):193-8. doi: 10.1016/j.jhazmat.2007.11.073. Epub 2007 Nov 23.

DOI:10.1016/j.jhazmat.2007.11.073

PMID:18166266

Abstract

Many nitroaromatic compounds (NACs) are considered toxic and potential carcinogens. The purpose of this study was to develop an integrated reductive/oxidative process for treating NACs contaminated waters. The process consists of the combination of zero-valent iron and an ozonation based treatment technique. Corrosion promoters are added to the contaminated water to minimize passivation of the metallic species. Water contaminated with 2,4-dinitrotoluene (DNT) was treated with the integrated process using a recirculated batch reactor. It was demonstrated that addition of corrosion promoters to the contaminated water enhances the reduction of 2,4-DNT with zero-valent iron. The addition of corrosion promoters resulted in 62% decrease in 2,4-DNT concentration to 2,4-diaminotoluene. The data shows that iron reduced the 2,4-DNT and ozone oxidized these products resulting in a 73% removal of TOC and a 96% decrease in 2,4-DNT concentration.

摘要

许多硝基芳香族化合物（NACs）被认为具有毒性和潜在致癌性。本研究的目的是开发一种用于处理受NACs污染水体的综合还原/氧化工艺。该工艺由零价铁和基于臭氧化的处理技术相结合组成。向受污染水体中添加腐蚀促进剂，以尽量减少金属物种的钝化。使用循环间歇式反应器，采用该综合工艺处理受2,4-二硝基甲苯（DNT）污染的水。结果表明，向受污染水体中添加腐蚀促进剂可增强零价铁对2,4-DNT的还原作用。添加腐蚀促进剂使2,4-DNT浓度降低62%，生成2,4-二氨基甲苯。数据显示，铁还原了2,4-DNT，臭氧氧化了这些产物，导致总有机碳（TOC）去除率达到73%，2,4-DNT浓度降低96%。