Activated carbon supported iron manganese oxide(MnFe2O4/AC)is prepared through hydrothermal synthesis method,and used to activate perdisulfate(PDS)to efficiently degrade bisphenol A(BPA)in water.The influences of PDS concentration,MnFe2O4/AC dosage and initial pH on the degradation efficiency of BPA are studied.It is shown by the results that in a certain range,the degradation rate of BPA increases with the increases of PDS concentration and MnFe2O4/AC dosage.BPA degradation rate tends to be stable when PDS concentration is 1.0 mM and MnFe2O4/AC dosage is 5 mg·L-1.BPA degradation rate reaches the highest when the initial pH value is 5.In addition,BPA can be effectively removed in pH values of 3-9.It is indicated by inorganic anion experiment that CO32-significantly inhibits the degradation of BPA in this system,while Cl-and SO42-have little effect.According to the free radical quenching experiment,·SO4-and OH are both active substances that play a role in this system,of which SO4 is the main active substance.This study demonstrates the effectiveness of MnFe2O4/AC activated PDS in degrading BPA.
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