Treatment of active brilliant blue KN-R wastewater by fly ash and microwave-Fenton oxidation
粉煤灰协同微波-Fenton氧化法处理活性艳蓝KN-R染料废水

The influences of fly ash dosage and adsorption time on removal effect were studied, and the orthogonal experiments were carried out to optimize the microwave-Fenton process. The result shows that flocculation and adsorption of fly ash have cooperative effect with microwave-Fenton oxidation. The optimal operating conditions are as follows: the fly ash dosage of 40 g/L, adsorption time of 20 min, the filtrate pH value of 4, the Fe2+ dosage of 3.6 mmol/L and H2O2 dosage of 0.15 mol/L, microwave power of 200 W, radiation time of 4 min. Under these conditions, the COD and chromaticity removal rate could reach 90.90% and 99.98%, respectively.