超声波强化Fenton试剂处理哌嗪废水的研究

采用超声与Fenton两种高级氧化技术联合处理哌嗪废水,取得了满意的效果。实验结果表明,超声波和Fenton试剂对哌嗪废水的催化降解存在协同效应。考察了初始pH、超声功率、Fenton试剂用量等因素对其CODCr去除效果的影响,并用正交试验优化降解条件。当超声波功率为70 W,初始pH为3.7,H2O2浓度为5.0 mmol/L,FeSO4浓度为0.15 mmol/L时,对哌嗪废水CODCr的去除率为99.9%。处理后出水CODCr<50 mg/L,达到了《污水综合排放标准》(GB 8978—1996)一级排放标准。

Experimental study on the degradation of piperazine industrial wastewater by ultrasonic combined Fenton reagent

Two kinds of advanced oxidation technologies,ultrasonic and Fenton,have been used jointly for treating piperazine industrial wastewater,and satisfactory effects obtained.The results show that ultrasonic and Fenton reagent has synergistic effect on the catalytic degradation of piperazine wastewater.The effects of the factors,such as initial pH,ultrasonic power,dosage of Fenton reagent,etc.on CODCr removing efficiency are investigated.The degradation condition is optimized by orthogonal test.When ultrasonic power is 70 W,initial pH 3.7,concentration of H2O2 5.0 mmol/L and concentration of FeSO4 0.15 mmol/L,the CODCr removing rate of piperazine wastewater is 99.9%.The treated effluent CODCr is below 50 mg/L,meeting the national first grade of the Integrated Wastewater Discharge Standard(GB 8978—1996).