电液压脉冲放电与铁屑内电解法联用处理TNT废水试验研究
Research on TNT wastewater treatment by electro-hydraulic pulse discharge/iron-inner-electrolysis
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摘要: TNT结构稳定，废水又具有生物毒性，难以生物降解，采用电液压脉冲放电与铁屑内电解法联用能有效处理TNT废水。研究了铁屑投加量、pH值和铁屑重复使用对TNT降解的影响。试验条件为：放电电压36 kV，废水体积7 L，TNT初始浓度90 mg/L，电极间距8 mm。结果表明，在投加铁屑700 g和pH值为6.5时，TNT降解率分别达到97.7%，铁屑重复使用6次不影响TNT降解效果；放电后静置一段时间，TNT仍然继续降解；在125 L的反应器中处理115 L废水，TNT初始浓度50 mg/L，TNT最大降解率达94.2％，TNT浓度降至2.9 mg/L。Abstract: TNT which structure is stable and wastewater is poisonous to the biology, is difficult to be bio-degraded. The electro-hydraulic pulse discharge/iron-inner-electroanalysis was used to treat TNT wastewater. In the experiment, the mass of iron adding to reactor, pH and iron reuse times were investigated, which discharge voltage was 36 kV, TNT wastewater concentration was 90 mg/L and volume was 7 L. The experiment results are as follows: when the mass of iron was 700 g and pH=6.5, the TNT degradation was 97.7%. The degradation remained when iron was reused 6 times. TNT was degraded all the same after discharges. TNT wastewater which volume was 115 L and concentration was 50 mg/L, were treated in the reactor of 125 L, the maximum of TNT degradation was 94.2%, which concentration reduced to 2.9 mg/L.
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