超临界水氧化降解DNT废水的实验研究  

Dinitrotoluene wastewater disposal by supercritical water oxidation

作　　者：赵保国[1] 刘玉存[1] 耿鹏印 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]河北高清环保科技有限公司,河北石家庄050000

出　　处：《化学工程》2008年第10期62-65,共4页Chemical Engineering(China)

基　　金：教育部科学技术研究项目(200512)

摘　　要：采用连续化的超临界水氧化中试装置处理了DNT炸药废水,在425,462,515,550,570,585,600℃下接得水样,并测得化学需氧量(COD)的值分别为106.3,98.8,73.2,44.9,32.6,18.2,23.1 mg/L。选取温度梯度425,515,550,585℃下的水样用无水乙醚萃取浓缩后,进行了HPLC和GC-MS监测。由于处理后水样浓度低,因此仅在质谱上测得585℃水样中含有极微量的C21H44,C24H50,C26H54,C29H60等不同碳原子数饱和烷烃。结果表明,DNT在超临界水氧化过程中,经历了生成醌类物质,然后开环断裂成有机羧酸至饱和烷烃,最终氧化生成N2,CO2和H2O。The dinitrotoluene （DNT） wastewater treatment was investigated in a continuous supercritical water oxidation system at 425, 462, 515, 550, 570, 585,600℃. The chemical oxygen demand （COD） of these samples after treatment was 106.3, 98.8, 73.2, 44.9, 32.6, 18.2 and 23.1 mg/L, respectively. The samples at 425, 515, 550, 585℃ were extracted with anhydrous ether, which was analyzed and identified systematically by GC-MS and HPLC. Because of low concentration of residues, the water sample at 585℃ was only tested to show that it contained tiny trace of alkanes like C21H44, C24H50, C26H54, C29H60 and so on. The results show that DNT in the supercritical water oxidation process is firstly converted into coupling and quinine compounds, then broken into organic carboxylates and saturated alkanes, and finally changed into N2, CO2 and H2O.

关 键 词：超临界水 DNT 氧化降解 火炸药废水 

分 类 号：X789[环境科学与工程—环境工程]