用芬顿试剂预氧化提高硝基苯废水的可生化性

硝基苯废水是极难生化降解的有毒污染物，使用常规方法难以对其进行净化处理。芬顿试剂（Ｆｅ＾２＾＋＋Ｈ２Ｏ２）作为一种强氧化剂，在投加量足够多的情况下，可使硝基苯氧化分解，但此一步处理法工艺成本高，很难实际应用。笔者以芬顿试剂为预氧化剂，对硝基苯废水进行了预氧化处理试验天空，紫外光谱分析和可生化测定结果表明：低剂量的芬顿试剂可以实现对硝基苯部分氧化降解。当化学耗氧量（ＣＯＤ）预氧化去除率达５０％时，出

Biodegradability Improvement of Nitrobenze Wastewater by Fenton's Reagent Preoxidation

Nitrobenzene is the poisonous pollutant which can not be biodegraded.It is very difficulty for common methods to purify it. Although, as a kind of strong oxidant, Fenton's reagent (Fe2+ +H2O2) can make nitrobenzene thoroughly oxidized with enough dosage, there is great difficulty for practical application because of the high cost of single step treatment. In this research, Fenton's reagent is used as the preoxidant to conduct preoxidation experiment for treating nitrobenzene-contained wastewater. The results of ultroviolet spectrum analysis and biodegradability determination show that when the removal of COD value reaches to 50% the concentration of nitrobenzene in the effluent can be decreased to a very low level which can not be detected by the ultroviolet spectrum analysis, and the biodegradability greatly improved (BOD5/COD value is above 0. 3)'.This provides the necessary condition for the following biochemical treatment.