超声波/Fenton处理含酚废水的影响因素

实验研究主要影响因素对超声波/Fenton试剂处理苯酚废水效果的影响,确定工艺参数。以人工配制的模拟苯酚废水为实验水样,通过静态实验研究pH值、FeSO4·7H2O投加量、H2O2投加量和超声时间对苯酚和COD去除率的影响。研究结果表明,对于苯酚浓度为200 mg/L, COD 为476.6 mg/L苯酚废水,在实验用水量为1 000 mL,pH值为6,FeSO4·7H2O投加量为800 mg/L,H2O2投加量为Qth,超声时间为30 min的条件下,苯酚去除率可达到92.27%,COD去除率可达到82.48%,处理后苯酚浓度为14.80 mg/L,COD为83.50 mg/L。pH值、FeSO4·7H2O投加量、H2O2投加量和超声时间对超声/Fenton工艺处理苯酚废水均有较显著地影响,工程应用时应给予足够的重视。

Influencing factors of ultrasound/Fenton process for phenol wastewater

The influence of main factors on treating phenol wastewater with ultrasound enhanced Fenton reagent was studied by laboratory scale experiments, and the parameters of the process were determined. The synthetic phenol wastewater was taken as the test samples. The static experiment was applied to investigate the influence of the pH, the dosage of FeSO4·7H2O, the dosage of H2O2 and the reaction time of ultrasound on the removal rate of phenol and COD. In this study, the phenol and COD concentrations of test samples was 200 mg/L and 476.6 mg/L, respectively. The volume of test samples was 1 000 mL and the pH was 6.The dosage of FeSO4·7H2O and H2O2 was 800 mg/L and Qth, respectively. The reaction time of ultrasound was 30 min. Under this condition, the removal rate of phenol was 92.27% and the removal rate of COD was 82.48%.The concentrations of phenol and COD in the effluent were 14.80 mg/L and 83.50 mg/L, respectively. This experiment indicated that the pH, the dosage of FeSO4·7H2O and H2O2,the reaction time all have great influence on the treatment efficiency of ultrasound enhanced Fenton process, these factors should be paid enough attention in engineering application.