本文介绍了等离子体及等离子体在环境方面的应用。包括等离子体产生机理及等

This article introduces the application of plasma and plasma in the environment. Including the plasma generation mechanism and how the plasma acts on the degradation of organic pollutants, wastewater sterilization, etc., and mainly based on the plasma discharge process and the phase distribution of the treatment object, respectively, the pure gas phase discharge, pure liquid phase discharge, and Gas-liquid two-phase discharge treatment of pollutants. It specifically introduces common discharge forms such as sliding arc discharge, dielectric barrier discharge, and the corresponding discharge devices. The article also mentions other methods that are often used in conjunction with plasma to achieve better results, such as ultrasound assistance, photocatalyst assistance, and chemical additive synergy. In the first part of the experiment, the fungicide azoxystrobin was used as a model pollutant, and a new underwater array jet reactor was used to explore the degradation of azoxystrobin under the conditions of input voltage, gas flow, and initial temperature of the solution. And a bubble model was established to analyze in detail the mass transfer of gas flow by affecting the mass transfer effect and then the degradation effect. When the gas velocity is increased from 0.7 SLM to 1.5 SLM, the thermal effect is greater than the proportion of active particles, the mass transfer effect is gradually enhanced, and the degradation effect is gradually enhanced. When the gas velocity increases and changes from 1.5 SLM to 5 SLM, the thermal effect is less than the proportion of active particles, the mass transfer effect is gradually weakened, and the degradation effect is also weakened. And the analysis shows that the initial temperature of the solution also affects the final degradation rate by affecting the mass transfer rate and mass transfer time. The degradation products of azoxystrobin were also sorted out through LC/MS, and two degradation pathways were proposed. One nitrile group is hydrolyzed and rearranged, and the other is pyrimidine ring opening. Under the most suitable conditions, the degradation rate of azoxystrobin can reach 98.1%. The second model pollutant is methyl blue, and the active plume of dielectric barrier discharge plasma is introduced into the water. The input voltage, gas flow rate, FeCl2·4H2O, FeSO4·7H2O, and NaCl are also studied in the same way. The amount of adsorption degradation of methyl blue. For the addition of three substances, the relevant effects of iron and chlorine in plasma treatment are studied. With FeCl2·4H2O added, the result of treatment for 3 minutes is 99.4%, which is nearly 3 times better than the effect of pure plasma treatment with the same parameters. Based on the experimental results and experimental phenomena, a mechanism of the iron-chlorine waterwheel effect is proposed. And through the Fourier infrared change spectrum to verify the precipitation of the adsorption of methyl blue, but also from the side proved the importance of the mechanism of the iron-chlorine waterwheel effect. The article also has some prospects for the future of plasma and the environment. The direction of plasma sewage treatment must be towards a simpler step and lower cost.

This paper introduces the application of plasma and plasma in the environment. Including plasma production process and how plasma act on the degradation of organic pollutants, wastewater sterilization, and mainly to plasma discharge process and treatment of the phase distribution of the object, respectively, described pure gas phase discharge, pure liquid phase discharge, and gas liquid two-phase discharge treatment of pollutants. The common discharge forms such as sliding arc discharge, medium blocking discharge and corresponding discharge devices are introduced. It also mentions other ways that are often associated with plasma to achieve better results, such as ultrasound assistance, photocatalyst assistance, chemical addition synergy, etc. The first part of the experiment takes the fungicide ster as a model pollutant, uses the new underwater array ejaculation reactor, explores the input voltage, gas flow, the initial temperature of the solution and other conditions, the degradation of the bacteria ester. The bubble model is established to analyze in detail the effect of gas flow mass transmission by affecting the mass transmission effect and then the degradation effect. The air speed increased from 0.7 SLM to 1.5 SLM, and the thermal effect was greater than the proportion of active particles, and the mass transmission effect was gradually enhanced, and the degradation effect was gradually enhanced. When the air speed increases from 1.5 SLM to 5 SLM, the thermal effect is less than the proportion of active particles, the mass transmission effect is gradually reduced, and the degradation effect is also reduced. The initial temperature of the solution is also analyzed to influence the final degradation rate by affecting the mass transfer rate and the transfer time. The degradation product of the sterilization by liquid joint is also combed, and two degradation paths are proposed. One barium-based hydrolyzed re-row, one is the ring open. Under the most suitable conditions, the degradation rate of sterilization can reach 98.1%. Selecting the second model pollutant is methyl blue, using the medium to block the discharge plasma active plume into the water way, the same study of input voltage, gas flow, FeCl2.4H2O, FeSO4.7H2O, NaCl three substances added to methyl blue adsorption degradation. For the addition of three substances, the correlation between iron and chlorine in plasma treatment is studied. FeCl2.4H2O was added, and the result of processing 3min was 99.4%, which is nearly 3 times better than the pure plasma processing effect of the same parameters. According to the experimental results, the mechanism mechanism of the effect of iron chlorine water truck is proposed. The adsorption of precipitation to methyl blue is verified by the Fourier infrared change spectral map, and the mechanism mechanism of iron chlorine water truck effect is also verified from the side. In this paper, there is also a partial vision of the future plasma and environment, plasma sewage treatment direction is certainly towards a step simplification, low cost.

This paper introduces plasma and its application in environment. It includes the generation mechanism of plasma and how plasma acts on the degradation of organic pollutants, wastewater sterilization and so on. It mainly focuses on the plasma discharge process and the phase distribution of the treatment object, and describes the pure gas phase discharge, pure liquid phase discharge, and gas-liquid two-phase discharge treatment of pollutants. The common discharge forms such as sliding arc discharge, dielectric barrier discharge and the corresponding discharge devices are introduced in detail. In this paper, we also mentioned other ways which are often combined with plasma to achieve better results, such as ultrasonic assistance, photocatalyst assistance, chemical addition cooperation and so on. In the first part of the experiment, azoxystrobin was used as a model pollutant, and a new underwater array jet reactor was used to investigate the degradation of azoxystrobin under the conditions of input voltage, gas flow rate and initial solution temperature. A bubble model was established to analyze the effect of gas flow on mass transfer and degradation. When the gas velocity increases from 0.7 SLM to 1.5 SLM, the thermal effect is greater than the proportion of active particles, the mass transfer effect and the degradation effect are gradually enhanced. When the gas velocity increases from 1.5 SLM to 5 SLM, the influence of thermal effect is less than that of the proportion of active particles, the mass transfer effect is gradually weakened, and the degradation effect is also weakened. The initial temperature of the solution also affects the final degradation rate by affecting the mass transfer rate and time. The degradation products of azoxystrobin were sorted out by LC-MS, and two degradation pathways were proposed. One is the hydrolysis rearrangement of nitrile group and the other is the ring opening of pyrimidine ring. Under the optimum conditions, the degradation rate of azoxystrobin could reach 98.1%. The second model pollutant is methyl blue. The active plume of the dielectric barrier discharge plasma is introduced into the water. The adsorption and degradation of methyl blue on the input voltage, gas flow rate, FeCl2? 4H2O, FeSO4? 7H2O and NaCl three substances are also studied. The effects of iron and chlorine on plasma treatment were studied. When FeCl 2 · 4H 2O is added, the result of treatment for 3 min is 99.4%, which is nearly three times better than that of pure plasma treatment with the same parameters. According to the experimental results and phenomena, a mechanism of iron chloride water vehicle effect is proposed. The adsorption of methyl blue on the precipitate was verified by Fourier transform infrared spectroscopy, and the importance of the mechanism of iron chloride water vehicle effect was also confirmed. This paper also has some prospects for the future of plasma and environment. The direction of plasma sewage treatment is to simplify the steps and reduce the cost.<br>