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Degradation of tiamulin by a packed bed dielectric barrier plasma combined with TiO_(2)catalyst

plasma Science and Technology 2022年第9期24卷 117-126页

作者： Kun YANG Hongwei SHEN Yueyue LIU Yang LIU Pingji GE Dezheng YANG School of Science Shihezi UniversityShihezi 832003People’s Republic of China Key Laboratory of Environmental Monitoring and Pollutant Control of Xinjiang Bingtuan Shihezi UniversityShihezi 832003People’s Republic of China Key Lab of Materials Modification Dalian University of TechnologyMinistry of EducationDalian 116024People’s Republic of China

Recently,a plasma catalyst was employed to efflciently degrade antibiotic residues in the *** this study,the plasma generated in a packed bed dielectric barrier reactor combined with TiO_(2)catalyst is used to degrade the antibiotic tiamulin(TIA)loaded on the surface of simulated soil *** effects of applied voltage,composition of the working gas,gas flow rate and presence or absence of catalyst on the degradation effect were *** was found that plasma and catalyst can produce a synergistic effect under optimal conditions(applied voltage 25 k V,oxygen ratio 1%,gas flow rate 0.6 l min^(-1),treatment time 5 min).The degradation efflciency of the plasma combined with catalyst can reach 78.6%,which is 18.4%higher than that of plasma without *** the applied voltage is 30 k V,the gas flow rate is 1 l min^(-1),the oxygen ratio is 1%and the plasma combined with TiO_(2)catalyst treats the sample for 5 min the degradation efflciency of TIA reached 97%.It can be concluded that a higher applied voltage and longer processing times not only lead to more degradation but also result in a lower energy *** the oxygen ratio and gas flow rate could improve the degradation *** relative distribution and identity of the major TIA degradation product generated was determined by high-performance liquid chromatography–mass spectrometry *** mechanism of TIA removal by plasma and TiO_(2)catalyst was analyzed,and the possible degradation path is discussed.

关键词： packed bed dielectric barrier discharge plasma catalyst tiamulin(TIA)antibiotics degradation degradation mechanism

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