The generation and transport of reactive nitrogen species from a low temperature atmospheric pressure air plasma source

Dickenson, Aaron; Britun, Nikolay; Nikiforov, Anton; Leys, Christophe; Hasan, M. I.; Walsh, James L.

doi:10.1039/c8cp05762a

Cited by 36 publications

(38 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On contrary, a significant rise of the reactive nitrogen species (RNS) is observed under high power conditions, including N 2 O and NO 2 , eventually resulting in O 3 decomposition. Alternatively, plasma effluent can be also defined as chemistries containing low and high dose of RONS, corresponding to the low and high power conditions [19,20,33]. The interaction between aqueous interface of wet mycotoxin sample and long-lived RONS induces the formation of a special liquid chemistry, which reintroduces very reactive, indirectly produced short-lived species, including OH and peroxynitrite (ONOO − ) [34,35].…”

Section: Resultsmentioning

confidence: 99%

“…Two plasma powers were used, termed low and high power, to generate contrasting plasma chemistries ranging from an ROS dominated mode (at low power) and an RNS dominated mode (at high power). A full description of the RONS produced under different operating power regimes can be found in our previous work [19,20,33].…”

Section: Methodsmentioning

confidence: 99%

“…Aflatoxins B 1 (AFB 1 ), B 2 (AFB 2 ), G 1 (AFG 1 ), G 2 (AFG 2 ), DON, 3-Acetyl DON (3-AcDON), 15-Acetyl DON (15-AcDON), diacetoxyscirpenol (DAS), HT-2, and T-2 were considered, as well as fumonisins B 1 (FB 1 ), B 2 (FB 2 ), and ZEN. The CAP system was based on a surface barrier discharge (SBD) configuration, using ambient air as the working gas and two different powers, leading to two different CAP chemistries [19,20]. To determine decontamination efficacy, the remaining mycotoxin concentration following CAP or UVC exposure was assessed using liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mycotoxin Decontamination Efficacy of Atmospheric Pressure Air Plasma

Hojnik

Modić

Tavčar-Kalcher

et al. 2019

Toxins

Self Cite

View full text Add to dashboard Cite

Mycotoxins, the toxic secondary metabolites of mould species, are a growing global concern, rendering almost 25% of all food produced unfit for human or animal consumption, thus placing immense pressure on the food supply chain. Cold Atmospheric pressure Plasma (CAP) represents a promising, low-cost, and environmentally friendly means to degrade mycotoxins with negligible effect on the quality of food products. Despite this promise, the study of CAP-mediated mycotoxin degradation has been limited to a small subset of the vast number of mycotoxins that plague the food supply chain. This study explores the degradation of aflatoxins, trichothecenes, fumonisins, and zearalenone using CAP generated in ambient air. CAP treatment was found to reduce aflatoxins by 93%, trichothecenes by 90%, fumonisins by 93%, and zearalenone by 100% after 8 minutes exposure. To demonstrate the potential of CAP-mediated mycotoxin degradation against more conventional methods, its efficiency was compared against ultraviolet C (UVC) light irradiation. In all cases, CAP was found to be considerably more efficient than UVC, with aflatoxin G1 and zearalenone being completely degraded, levels that could not be achieved using UVC irradiation.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mycotoxin Decontamination Efficacy of Atmospheric Pressure Air Plasma

Hojnik

Modić

Tavčar-Kalcher

et al. 2019

Toxins

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, it may be possible to scale up production and reduce the cost of PTW by applying plasmas generated in ambient air to treat a continuous flow of liquid. Several works have reported on treating a liquid flow using air as the process gas, however, the major drawback of these studies is the considerably low production rate of RONS, which limits the wide application of the produced PTW [13,15,18,27,28].…”

Section: Introductionmentioning

confidence: 99%

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

et al. 2019

View full text Add to dashboard Cite

In this work, we developed a portable device with low production and operation costs for generating an ambient air low-current arc (AALCA) that is transferred to the surface of a treated liquid. It was possible to generate a stable discharge, irrespective of the conductivity of the treated liquid, as a sequence of corona, repeating spark, and low-current arc discharges. The estimated concentration of reactive oxygen and nitrogen species (RONS) in plasma-treated water (PTW) produced using AALCA treatment was two orders of magnitude higher than that of PTW produced using conventional He nonequilibrium atmospheric pressure plasma jets or dielectric barrier discharges. The strong bactericidal effect of the treatment using AALCA and the water treated using AALCA was confirmed by survival tests of Escherichia coli. Further, the possibility of treating a continuous flow of liquid using AALCA was demonstrated.

show abstract

“…In recent years, considerable interest has been attracted to the investigations of the low-current atmosphericpressure discharges in gas flow [1][2][3][4][5]. A variety of the discharge types and the electrode configurations are used in the experiments [2,3,[6][7][8][9][10][11][12][13][14][15][16]. The present paper deals with the glow-type discharge in airflow in the electrode system of the classical coaxial plasmatron [3,[17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Nonsteady-state processes in a low-current discharge in airflow and formation of a plasma jet

et al. 2019

View full text Add to dashboard Cite

The paper describes the investigations of a low-current discharge in airflow with the electrode configuration of coaxial plasmatron. An inner diameter of the plasmatron nozzle is of 0.5 cm and the mass airflow rate is from 0.1 to 0.3 g s −1 . Typical averaged discharge current is varied from 0.06 to 0.2 A. In these conditions, due to airflow the so-called plasma jet forms in the plasmatron nozzle and at its exit. The total current in plasmatron mainly flows via the constricted plasma column of the glow discharge and only a small fraction of current is carried by the jet. The principal idea of the experiments is to reveal the mechanism of the jet formation and to elucidate how the nonsteady discharge regimes influence on the jet properties. We have proposed the method for the jet diagnostics, which is based on measuring the currents to the additional diagnostic electrodes located outside the nozzle. The obtained data show that the jet current forms due to electrons that are emitted from the boundary of plasma column. The temporal behavior of the jet current is determined by the position of the column inside the plasmatron nozzle, which changes with time. Hence, the term 'plasma jet' has to be used with care, since the charged particles in the jet area are the electrons. The estimated electron density in the jet is of about 10 9 cm -3 .

show abstract

The generation and transport of reactive nitrogen species from a low temperature atmospheric pressure air plasma source

Abstract: The transport of reactive nitrogen species from a non-equilibrium gas discharge is dominated by electrohydrodynamic forces created within the plasma.

Cited by 36 publications

References 28 publications

Mycotoxin Decontamination Efficacy of Atmospheric Pressure Air Plasma

Mycotoxin Decontamination Efficacy of Atmospheric Pressure Air Plasma

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

Nonsteady-state processes in a low-current discharge in airflow and formation of a plasma jet

Contact Info

Product

Resources

About