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Benstaali, Baghdad; Boubert, Pascal; Chéron, B. G.; Addou, A.; Brisset, Jean‐Louis

doi:10.1023/a:1021371529955

Cited by 193 publications

(69 citation statements)

References 7 publications

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“…A glass hood (6) with sampling tube (15) and water-cooled exhaust duct (16) is placed over the plasma reactor. The exhaust gas is cooled by the exhaust duct, and the condensate flows into the flask (13).…”

Section: Methodsmentioning

confidence: 99%

“…The energetic electrons produce radicals, such as OH and NO, which present highly oxidizing or acid properties. (12,13) A gliding arc reactor has been designed in our laboratory with the aim to degrade organic wastewater at atmospheric pressure. The wastewater to be treated is sprayed through an atomizing nozzle equipped with separated feeding systems for gas and liquid.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of Phenol in Aqueous Solutions by Gas–Liquid Gliding Arc Discharges

Yan

et al. 2006

Plasma Chem Plasma Process

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The efficiency of a gliding arc reactor designed with the aim to degrade aqueous phenol solutions is studied as a function of supply voltage, electrode gap distance, and gas-liquid flow properties. This efficiency, which steeply increases when increasing the supply voltage, can reach 96% when the minimum electrode distance is fixed at 3 mm. Experiments show that phenol degradation efficiency also depends on solution pH, Fe 2+ addition, gas nature and gas flow rate. Furthermore, degradation pathways of phenol in aqueous solutions are proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Degradation of Phenol in Aqueous Solutions by Gas–Liquid Gliding Arc Discharges

Yan

et al. 2006

Plasma Chem Plasma Process

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“…5,6 Such gliding arc discharges have been widely applied to pollution control, 7-11 surface treatment, 1,12 sterilization, 13 and combustion enhancement. 14 Extensive studies have been performed on the dynamics, [15][16][17][18] physical characteristics, [19][20][21][22][23][24][25][26][27][28] and chemical mechanisms [29][30][31] involved in gliding arc discharges. Phenomenological models 21,[32][33][34] were developed to explain the discharge behavior based on accurate measurements of several important parameters, including the slip velocityṼ S (it stands for the relative velocity between the plasma columnṼ C and the gas flowṼ F , and its magnitude is jṼ S j ¼ jṼ C ÀṼ F j), and the length of the plasma column.…”

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confidence: 99%

Measurements of 3D slip velocities and plasma column lengths of a gliding arc discharge

Zhu

Gao

Ehn

et al. 2015

Applied Physics Letters

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A non-thermal gliding arc discharge was generated at atmospheric pressure in an air flow. The dynamics of the plasma column and tracer particles were recorded using two synchronized high-speed cameras. Whereas the data analysis for such systems has previously been performed in 2D (analyzing the single camera image), we provide here a 3D data analysis that includes 3D reconstructions of the plasma column and 3D particle tracking velocimetry based on discrete tomography methods. The 3D analysis, in particular, the determination of the 3D slip velocity between the plasma column and the gas flow, gives more realistic insight into the convection cooling process. Additionally, with the determination of the 3D slip velocity and the 3D length of the plasma column, we give more accurate estimates for the drag force, the electric field strength, the power per unit length, and the radius of the conducting zone of the plasma column.

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“…Because the underwater DBD plasma generates an abundance of OH radicals, it may have a general mechanical effect on the E. coli O157:H7 surface. [40][41][42] Micro-organisms in plasma are exposed to an intense attack by these radicals that likely generate surface abrasions that the living cell cannot repair rapidly. This may explain why cells are destroyed very quickly in many cases.…”

Section: Resultsmentioning

confidence: 99%

Roles of individual radicals generated by a submerged dielectric barrier discharge plasma reactor during Escherichia coli O157:H7 inactivation

2015

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A submerged dielectric barrier discharge plasma reactor (underwater DBD) has been used on Escherichia coli O157:H7 (ATCC 35150). Plasma treatment was carried out using clean dry air gas to investigate the individual effects of the radicals produced by underwater DBD on an E. coli O157:H7 suspension (8.0 log CFU/ml). E. coli O157:H7 was reduced by 6.0 log CFU/ml for 2 min of underwater DBD plasma treatment. Optical Emission Spectra (OES) shows that OH and NO (α, β) radicals, generated by underwater DBD along with ozone gas. E. coli O157:H7 were reduced by 2.3 log CFU/ml for 10 min of underwater DBD plasma treatment with the terephthalic acid (TA) OH radical scavenger solution, which is significantly lower (3.7 log CFU/ml) than the result obtained without using the OH radical scavenger. A maximum of 1.5 ppm of ozone gas was produced during the discharge of underwater DBD, and the obtained reduction difference in E.coli O157:H7 in presence and in absence of ozone gas was 1.68 log CFU/ml. The remainder of the 0.62 log CFU/ml reduction might be due to the effect of the NO (α, β) radicals or due to the combined effect of all the radicals produced by underwater DBD. A small amount of hydrogen peroxide was also generated but does not play any role in E. coli O157:H7 inactivation.

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Cited by 193 publications

References 7 publications

Degradation of Phenol in Aqueous Solutions by Gas–Liquid Gliding Arc Discharges

Degradation of Phenol in Aqueous Solutions by Gas–Liquid Gliding Arc Discharges

Measurements of 3D slip velocities and plasma column lengths of a gliding arc discharge

Roles of individual radicals generated by a submerged dielectric barrier discharge plasma reactor during Escherichia coli O157:H7 inactivation

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