2010•Journal of Nanjing University of TechnologyRequires access
Treatment of high concentration pharmaceutical intermediate wastewater by microwave-assisted Fenton oxidation
Yanhua Xu
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Abstract
High concentration pharmaceutical intermediate wastewater was treated by microwave-assisted Fenton oxidation process.The influential factors,such as initial pH value,H2O2(30%) dosage,FeSO4·7H2O dosage,microwave power,and reaction time on chemical oxygen demand(COD) removal were investigated.The optimal conditions were determined as follows: initial pH of 4,the H2O2 dosage of 5 mL/L,the FeSO4·7H2O dosage of 3 g/L,microwave power of 300 W,and reaction time of 7 min.Under the optimum conditions,the COD removal rate could reach 89.7% when treating 500 mL of the wastewater.Kinetics study indicated that the degradation process accorded with the first-order reaction kinetics model,and the half life was 2.60 min.