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• W4284893640 endingPage "121644" @default.
• W4284893640 startingPage "121644" @default.
• W4284893640 abstract "• A dielectric barrier discharge (DBD) reactor was used for to efficiently degrade hazardous benzohydroxamic acid (BHA). • The degradation process of BHA in DBD reactor conforms to first-order kinetic equations. • For AC voltage 14.5 kV, gas flow 30 L/min, treatment time 60 min, and concentration 80 mg/L, the degradation efficiency of BHA wastewater reached the highest 98.7 %. • O 3 , H 2 O 2 , and their transformed •OH, •O 2 - were the main causes of BHA degradation. • It verifies that Industrial beneficiation wastewater usually contains Pb 2+ and Cd 2+ improved the BHA degradation by the dielectric barrier discharge technology. A dielectric barrier discharge (DBD) reactor was developed to efficiently degrade hazardous benzohydroxamic acid (BHA) in industrial beneficiation wastewater. The structural and optimum discharge parameters of the DBD reactor for BHA degradation were determined experimentally. Degradation, visual images, voltage-current waveforms, and Lissajous figures were used to evaluate the BHA abatement performance. After treatment for 40 min, 84.3 % of BHA was degraded. The energy yield attained a maximum of 0.63 mg/kWh at 13.5 kV and a gas flow rate of 30 L/min. Regardless of the energy yield, the maximum degradation of BHA was 98.7 %. The BHA decomposition is described by a first-order kinetic model. The results demonstrate that if the BHA wastewater contains Pb 2+ and Cd 2+ ions, degradation of BHA is slightly improved by DBD. The degradation mechanism of BHA in the DBD reactor was analyzed by testing the concentration changes of O 3 , H 2 O 2 in the solution and the influence of •OH, •O 2 – on the degradation. This confirmed that hydrated electrons were not an important active substance in the degradation when discharge plasma was formed in an air atmosphere. Liquid chromatography-mass spectrometry was used to identify the intermediates of the degradation reaction and predict the degradation pathway of BHA." @default.
• W4284893640 created "2022-07-09" @default.
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• W4284893640 date "2022-10-01" @default.
• W4284893640 modified "2023-10-18" @default.
• W4284893640 title "Degrading hazardous benzohydroxamic acid in the industrial beneficiation wastewater by dielectric barrier discharge reactor" @default.
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• W4284893640 doi "https://doi.org/10.1016/j.seppur.2022.121644" @default.
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