污染控制技术及原理
何义亮,Joseph B.Hughes,Sung SooHan.Fenton氧化处理爆炸物污染土壤的实验研究[J].环境科学学报,2007,27(10):1657-1662
Fenton氧化处理爆炸物污染土壤的实验研究
- Fenton treatment of 2,4-and 2,6-dinitrotoluene in soil contaminated with explosive compounds
- 基金项目：
- 作者
- 单位
- 何义亮
- 1. School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332 USA; 2. 上海交通大学环境科学与工程学院 上海 200240
- Joseph B.Hughes
- School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- Sung SooHan
- School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- 摘要：采用摇瓶和玻璃柱试验考察了Fenton氧化处理爆炸物污染土壤中2,4-DNT 、2,6-DNT 以及COD等的去除效果及其最佳参数.当3%H2O2投加量达到26.46mmol、FeSO4和H2O2的物质的量之比约为1:73.56时,2,4-DNT 和2,6-DNT 均可被完全氧化,COD去除率可达到87%.对于2,4-DNT 和2,6-DNT,反应时间只需要2h,但要同时去除其它芳香族硝基化合物,则反应时间需要超过8h.土壤直接Fenton氧化的效果并不理想,而对洗出液进行Fenton氧化可以取得很好的效果.通过反应动力学分析和丙酮抑制试验得出,2,4-DNT 比2,6-DNT 容易氧化.GC-MS分析结果表明,不仅土壤中的2,4-DNT 、2,6-DNT 可被氧化,其它的硝基芳香族有机化合物也可被氧化去除.
- Abstract：The performance and technical parameters of Fenton treatment of 2,4-and 2,6-dinitrotoluene(DNT)in soil contaminated with explosive compounds has been investigated at laboratory scale.The experimental results showed that 2,4-and 2,6-DNT were removed completely in two hours while 87% of COD was removed in eight hours.The optimal H2O2 concentration was 26.46mmol,corresponding to a FeSO4:H2O2 mole ratio of 1:36.78~73.56.Much better removal performance can be achieved by Fenton oxidation treatment of washing-out liquid than by direct oxidation of contaminated soil on a column.Based on kinetic analysis and acetone inhibition assays,it was concluded that Fenton oxidation of 2,4-DNT is easier than oxidation of 2,6-DNT.GC-MSanalysis showed that not only 2,4-DNT and 2,6-DNT but also other nitroaromatic organic compounds were totally removed during Fenton oxidation treatment.
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