Study on microwave combined with granular active carbon for treatment of p-nitrophenol wastewater

摘要

A microwave technique assisted with granular active carbon (GAC) was used for the degradation of p-nitrophenol (PNP) wastewater. The effective factors such as the initial concentration of PNPl, active carbon dosage, microwave power and irradiation time on the degradation rate were studied. When the concentration of PNP was 200 mg/L, active carbon dosage was 6 g/L, microwave power was 500 W, and irradiation time was 8 min, the removal ratio of PNP reached 99.03%. The concentration o f PNP could be decreased to be low 2 mg/L, which satisfied with the national first degree let out level. The results show that the technology can be a practical and effective method for treating PNP organic wastewater.