Rapid fenton degradation of phenol by magnetic carbon microspheres
Magnetic carbon microspheres(Fe3O4@CMSs)were prepared by a simple and efficient hydrothermal carbonisation meth-od using soluble starch as a carbon source and magnetic Fe3O4 as a magnetic excipient,and activated at 700 ℃.The resulting sam-ples were also characterised and analysed by Fourier infrared spectrometer,X-ray powder diffractometer,scanning electron micro-scope,X-ray photoelectron spectroscopy,specific surface area and pore size analyser.Phenol solution was used to simulate the or-ganic waste solution to investigate the degradation performance of Fe3O4@CMSs and the possible degradation mechanism,and the effects of the addition of Fe3O4@CMSs,the pH of the solution system,the amount of H2O2,the temperature,and the reaction time on the degradation performance of phenol were investigated.The results showed that phenol could be completely degraded when the concentration of phenol solution was 100 mg·L-1,the addition of Fe3O4@CMSs was 2 g·L-1,the pH of the solution was 5,and the addition of H2O2 was 0.6 mL·L-1,the temperature of the reaction was room temperature,and the time of the reaction was 5 min.The quenching experiments revealed that·O2-,OH,and1O2 were all involved in the degradation of phenol in the reaction system.The recycling experiment showed that the degradation rate of Fe3O4@CMSs was still more than 88％after four times of recycling.
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维普
