Microwave induced catalytic degradation of malachite green(MG)was investigated in this study，where Nano?sized zinc ferrite powder synthesized via coprecipitation process was used as a microwave induced catalyst.The phase structure and size of the catalyst were characterized by XRD and TEM.The results indicated that the catalyst was a pure ZnFe2O4 and its grain was spherical；and grain size rose with the calcination temperature.The degradation results showed that the target compounds of 20 mg·L－1 were completely removed in 2 minutes.Main intermediate products were identified by LC/MS and GC/MS.the possible degradation mechanisms contains four processes：N?demethylation，chromophore cleavage，ring opening and mineralization.Comparison on the differences of intermediates products before and after H2O2 addition，indicated its possible degradation mechanisms were different.Chromophore cleavage process played a more important role in the presence of H2O2.Microwave induced catalysis could be recommended as a promising method for wastewater treatment.
Yang Shaogui*，Meng Lingjun，Li Dongfang，He Huan，Sun Cheng.
Microwave induced catalytic degradation of malachite green in water[J]. Journal of Nanjing University(Natural Sciences), 2017, 53(2): 294
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