纳滤-Fenton试剂联合作用处理硝基苯废水

TREATMENT OF NITROBENZENE WASTEWATER BY NF-FENTON REAGENT

为解决高浓度有机物污染地下水的应急处理问题,以硝基苯为目标污染物,研究了纳滤-Fenton试剂组合工艺对硝基苯处理效果;考察了纳滤膜的截留作用以及进水浓度、流量、pH、温度等因素对截留效果的影响。结果表明,在一级一段循环模式条件下,以硝基苯污染原水的实际情况运行,截留率可达64.15%。纳滤过程循环的浓缩液采用Fenton试剂法进行处理,利用正交试验研究H2O2用量、Fe2+浓度、pH和反应时间4个因素对硝基苯废水处理过程的影响,在最佳工艺条件下硝基苯的去除率可达到93%以上。

In order to solve the emergency treatment of groundwater contaminated by highly concentrated organic pollutants, nitrobenzene as example, the treatment effect of nitrobenzene was studied with the process of NF-Fenton reagent. The effects of four main factors including influent concentration, flow, pH and temperature on membrane rejection of nitrobenzene were studied by using nanofiltration technology. The rejection could reach 64.15% with the actual polluted groundwater by the cyclical nanofiltration process. Fenton reagent was used to treat condensed water of nitrobenzene from nanofiltration process. The effect of four factors including the amount of H2O2, the concentration of Fe^2＋, pH value and reaction time on the removal rate ofnitrobenzene were studied by orthogonal test. The removal rate was reached more than 93% in optimum reaction conditions.