电-Fenton法降解TNT弹药销毁废水

2,4,6-三硝基甲苯(TNT)弹药销毁废水的色度高、毒性大、不易生化降解。采用电Fenton法降解TNT弹药销毁废水。研究了电压(U)、极板间距(D)、初始pH、H2O2投加量(M)、n(Fe2+)/n(H2O2)摩尔比及反应时间(T)对废水COD去除率的影响;优化了反应条件:在U=8 V,D=1 cm,初始pH=3,M(H2O2) =0.0916 mol/L,n(Fe2+)/n(H2O2)=1:30,T=4 h的条件下,废水的COD去除率大于86%,出水的其余指标如色度、氨氮、pH、TNT含量等各指标经国标法测量均达标。通过对反应动力学方程的分析,得出该实验基本符合二级反应动力学。该法操作简单实用,是处理该废水行之有效的方法。

Degradation of TNT ammunition disposal wastewater by electro-Fenton method

Ammunition disposal wastewater, which mainly contains 2,4,6-trinitrotoluene(TNT), has characteristics of high chromaticity and high toxicity, and it is not easy to be biochemically degradated. The method of electro-Fenton was used to degrade the TNT ammunition disposal wastewater. The effects of voltage(U), plate spacing(D), initial pH, H2O2 dosing quantity(M), Fe2+/H2O2 mole ratio and reaction time(T) on the wastewater COD removal efficiency were studied. The optimum reaction conditions were concluded: voltage=8 V, plate spacing=1 cm, initial pH=3, H2O2 dosing quantity=0.0916 mol/L, n(Fe2+)/n(H2O2)=1:30, reaction time=4 h.Then, over 86% COD removal efficiency was obtained. The other index of effluent such as color, ammonia, pH and TNT content, were up to standard, which were measured by GB methods. Through analyzing reaction kinetics equation, there was a conclusion that the experiment accorded with the secondary reaction kinetics. The method is simple operating and practical, which is proved to be effective for the treatment of this kind of wastewater.