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Novel electrode structure in a DBD reactor applied to the degradation of phenol in aqueous solution

Plasma Science and Technology 2017年第7期19卷 71-84页

作者： Antonio MErCADO-CABrErA rosendo pe.A-EGUIlUZ r.gulo lópe.-callejas Bethsabet JArAMIllO-SIErrA raúl VAlENCIA-AlVArADO Benjamín rODríGUEZ-MéNDEZ Arturo E MU?OZ-CASTrO Instituto Nacional de Investigaciones Nucleares Plasma Physics Laboratory Tecnológico de Estudios Supe.iores de Tianguistenco

Phenol degradation expe.imental results are presented in a similar wastewater aqueous solution using a non-thermal plasma reactor in a coaxial dielectric barrier discharge. The novelty of the work is that one of the electrodes of the reactor has the shape.of a hollow screw which shows an enhanced efficiency compared with a traditional smooth structure. The expe.imentation was carried out with gas mixtures of 90% Ar-10% O2, 80% At-20% 02 and 0% Ar-100% 02. After one hour of treatment the removal efficiency was 76%, 92%, and 97%, respe.tively, assessed with a gas chromatographic mass spe.trometry technique. For both reactors used, the ozone concentration was measured. The screw electrode required less energy, for all gas mixtures, than the smooth electrode, to maintain the same ozone concentration. On the other hand, it was also observed that in both electrodes the electrical conductivity of the solution changed slightly from ,-0.0115 S m^-1 up to -0.0430 S m^-1 after one hour of treatment. The advantages of using the hollow screw electrode structure compared with the smooth electrode were：（1） lower typical power consumption, （2） the generation of a uniform plasma throughout the reactor benefiting the phenol degradation, （3） a relatively lower tempe.ature of the aqueous solution during the process, and （4） the plasma generation length is larger.

关键词： DBD gas discharges removal organic compounds discharge in liquids

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Atmospheric-pressure dielectric barrier discharge generation by a full-bridge flying capacitor multilevel inverter

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Plasma Science and Technology 2017年第7期19卷 40-49页

作者： rosendo pe.A-EGUIlUZ José A lópe.-FErNáNDEZ Antonio MErCADO-CABrErA Bethsabet JArAMIllO-SIErrA r.gulo lópe.-callejas Benjamín rODríGUEZ-MéNDEZ raúl VAlENCIA-AlVArADO Allan A FlOrES-FUENTES Arturo E MU?OZ-CASTrO Plasma Physics laboratory Instituto Nacional de Investigaciones Nucleares Tecnológico de Estudios Supe.iores de Tianguistenco Universidad Autónoma del Estado de México

A new configuration of a resonant full-bridge flying capacitor multicell inverter has been designed and constructed with the aim of achieving an extended output voltage frequency range with low harmonic distortion and reduced semiconductor commutation losses. This configuration was tested as a power supply for two different coaxial dielectric barrier discharge reactors, one of them employed for electric characterization and the other one for inorganic compound elimination in an aqueous solution. Two different gas mixtures, 90% Ar-10% 02 and 80% Ar-20% 02, were individually supplied during the expe.iments; the results showed a high- efficiency removal of meta-cresol （m-cresol） to the order of 98%, which was obtained by adding more oxygen to the plasma gas mixture.

关键词： plasma applications water pollution plasma sources power supply circuits electricdischarges

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洁悠神用于留置导尿尿路感染预防的研究

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护理研究 2005年第2期19卷 242-242页

作者：吴玲王良梅程蓓丁树梅戴玉田南京大学医学院附属鼓楼医院

留置导尿是解决排尿困难的主要手段.导尿管放置后伴随性尿路感染(UTIC)是一种常见的院内感染,目前临床上尚无有效的预防和控制方法.

关键词：尿路感染留置导尿菌尿洁悠神院内感染导尿管放置增加手段问题

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