光催化与Fenton试剂对硝基苯酚降解的研究

文章对光催化/Fenton试剂联合降解硝基苯酚模拟废水进行了研究。探讨了硝基苯酚溶液的初始浓度、pH、亚铁离子浓度、双氧水浓度、催化剂量等对对硝基苯酚降解效果影响。结果表明,对于200mL,浓度为100mg/L的硝基苯酚溶液,当加入Fe2+为20mg/L,5mmol/LH2O2,催化剂TiO2为0.6g/L,紫外灯功率为250W且反应40min后,对硝基苯酚的降解率达到约100%。通过对比试验,发现光催化和Fenton试剂对对硝基苯酚的降解起协同作用,并通过GC/MS技术测定中间产物并给出了可能的降解途径。

Photocatalysis Coupled with Fenton Reagent for Degrading p-Nitrophenol

The laboratory experiment of photocatalysis coupled with Fenton reagent for degradation of p-nitrophenol(PNP) is intended to evaluate the influence of parameters including pH value,concentrations of initial PNP,Fe2+ and H2O2,as well as the amount of catalyst TiO2 added. It is reported that 100% degradation of p-nitrophenol is realized within 40 min,with UV illumination of 250W,additions of Fe2(+20mg/L) ,H2O2(5mmol/L) and TiO2(0.6g/L) . It is also found that coupled photocatalysis and Fenton reagent has led to a synergetic action;and GC/MS can help understand the intermediates produced during the degradation of PNP.