Comparison of UV/H2O2 and UV/PDS Systems for Fosfomycin Degradation Effectiveness
UV advanced oxidation technology for organic pollutants degradation is widely used due to the advantages of simple operation,low cost and less secondary pollution.The target pollutant in this work was fosfomycin sodium,and the organic phosphorus(OP)degradation was explored using two advanced oxidation processes which were UV/H2O2 and UV/PDS,and the kinetics and reaction mechanism of OP degradation in the two systems were compared.The research results demonstrated that the reactive groups generated by the UV-activated oxidant could effectively degrade OP in the UV/H2O2 and UV/PDS,with 97.3%and 95.0%removal efficiency respectively.All of these variables,including the initial pH,initial oxidant concentration and reaction temperature all affected the OP degradation.In comparison with UV/H2O2,the UV/PDS system had the advantages of wider pH application range,lower reaction temperature,less oxidant dosage and faster reaction rate when degrading OP.The best conditions were achieved through the correspondence of two systems,both of which were environmentally adaptive.The radical capture text and electron paramagnetic resonance technology(EPR)indicated that OH was present in the UV/H2O2 system,while both SO·-4 and·OH were present in the UV/PDS system.Gas chromatography-mass spectrometry(CG/MS)determined that both systems contained acetic acid and propionic acid after degrading fosfomycin sodium.
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