Removing bisphenol A with magnetic sandwich composite activated peroxymonosulfate
The magnetic sandwich composite Fe3O4@MXene was prepared to activate peroxymonosulfate(PMS)for removing Bisphenol A(BPA)from water.The effects of PMS dosage,Fe3O4@MXene dosage,initial solution pH value and initial BPA concentration on BPA degradation were investigated.The results show that the degradation of BPA conformed to the quasi-first order reaction kinetics.At 25℃,the combination of Fe3O4@MXene dosage of 0.3g/L,PMS dosage of 1.01g/L and initial pH of 6.0could degrade 97.4％of BPA(25mg/L)after 90-minute,in which hydroxyl radical and sulfate radical were the dominant reactive oxygen species for BPA degradation despite having singlet oxygen involved.The MXene-supported Fe3O4 particles showed a uniform size distribution with obviously improved activity and stability.The Ti atoms on the surface of MXene helped accelerate the Fe(Ⅱ)/Fe(Ⅲ)redox cycle,which thus improved PMS activation.Evidently,the Fe3O4@MXene can be used as an ideal heterogeneous catalyst for the advanced oxidation process of persulfate.
Fe3O4@MXene compositeadvanced oxidationbisphenol Aheterogeneous system
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维普
