Development and Optimization of Single Filament Plasma Jets for Wastewater Decontamination

Yehia, Sasa-Alexandra; Zarif, Maria Elena; Biţă, Bogdan; Teodorescu, Maximilian; Carpen, Lavinia Gabriela; Vizireanu, Sorin; Petrea, Nicoleta; Dinescu, G.

doi:10.1007/s11090-020-10111-0

Cited by 6 publications

(3 citation statements)

References 46 publications

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“…Its color was akin to the nitrogen orange afterglow [30,31]. Contrary to the expectations based on the appearance of Ar/N 2 capillary discharges with visible nitrogen afterglow [31][32][33], the diffuse plasma was not present directly below the constricted filament but on its sides, creating a double plume structure (total diameter of 15-20 mm).…”

Section: Self-organization Patternsmentioning

confidence: 61%

Self-organization phenomena in cold atmospheric pressure plasma slit jet

Polášková¹,

Nečas²,

Dostál³

et al. 2022

Plasma Sources Sci. Technol.

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The RF plasma slit jet, which produces 150 mm wide streaming plasma outside the jet body, exhibits exciting self-organization phenomena that resemble the self-organized patterns of dielectric barrier discharge (DBD) ﬁlaments. Similarly, as in DBD, the ﬁlaments are surrounded by an inhibition zone that does not allow two ﬁlaments to come closer to each other. With fast camera imaging, we observed the ﬁlamentary character of the discharge in all the studied gas feeds (Ar, Ar/N2, and Ar/O2). Still, the visual appearance of the ﬁlaments in the plasma and their interaction with a dielectric surface depended signiﬁcantly on the gas feed. As the breakdown voltage in pure Ar is relatively low compared to the applied one, new ﬁlaments form frequently. Such newly created ﬁlaments disrupted the characteristic inter-ﬁlament distance, forcing the system to rearrange. The frequent ignition and decay processes in Ar led to short ﬁlament lifetimes (0.020–0.035 s) and their high jitter speed (0.9–1.7 m/s), as determined with an image processing custom code based on Gwyddion libraries. The number of ﬁlaments was lower in the Ar/O2 and Ar/N2 mixtures. It was attributed to a loss of energy in the excitation of rotational and vibrational levels and oxygen electronegativity. Since the probability of low-current side discharges transitioning into the full plasma ﬁlaments was limited in these gas mixtures, the self-organized pattern was seldom disrupted, leading to lesser movement and longer lifetimes. Unlike in Ar or Ar/O2, the constricted ﬁlaments in Ar/N2 were surrounded by diﬀuse plasma plumes, likely connected to the presence of long-lived nitrogen species. We demonstrated in the polypropylene treatment that the self-organization phenomena aﬀected the treatment uniformity.

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Section: Self-organization Patternsmentioning

confidence: 61%

Self-organization phenomena in cold atmospheric pressure plasma slit jet

Polášková¹,

Nečas²,

Dostál³

et al. 2022

Plasma Sources Sci. Technol.

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“…Based on the works of literature on the decolorization of industrial dyes [163][164][165][166][167][168][169], the present decolorization rate depends upon the gas flow rate, working gas composition, duration of the voltage pulses, gap distance, injected power, barrier thickness and types of electrodes materials, etc. Therefore, the process parameters and treatment conditions must be optimized in the treatment process to improve the decolorization rate [170].…”

Section: Effect Of Different Discharge Parameters On Wastewater Purif...mentioning

confidence: 99%

Recent Progress in Applications of Atmospheric Pressure Plasma for Water Organic Contaminants’ Degradation

Yin,

Xu,

Zhu

et al. 2023

Applied Sciences

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Owing to current global water scarcity, there is an urgent need for advanced water treatment technologies to be invested in wastewater treatment processes. Additionally, there is growing concern that some anthropogenic contaminants have been detected in finished drinking water and wastewater slated for reuse, such as organic chemicals, pharmaceuticals, industrial dyes and even viruses, and their health effects are poorly understood at low concentrations. Atmospheric pressure plasma (APP) is a kind of advanced oxidation technology with high efficiency, low energy consumption, and little environmental impact. In recent decades, as a new method of environmental pollution abatement, APP has proven able to decompose and even completely eliminate stubborn organic contaminants. This paper focuses on the application of different types of plasma in the wastewater purification, such as water containing perfluorinated compounds, pesticides, pharmaceuticals, dyes, phenols, and viruses. Then, the effects of discharge parameters (discharge power, electrode distance, gas flow rate and working gas composition) on degradation efficiency were summarized. Finally, the existing challenges and future prospects of plasma-based wastewater purification are outlined.

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“…ACP is composed of several excited atomic, molecular, ionic, and radical species, coexisting with numerous reactive species, including electrons, positive and negative ions, free radicals, gas atoms, molecules in the ground or excited state, UV light, shockwave and pyrolysis, which contribute to chemical and physical effects that can have an impact on organic pollutants decomposing them into more environmentally friendly compounds (Rancev et al, 2019;Ceriani et al, 2018;Wang and Xu, 2012). Different articles reported the treatment of methylene blue (MB), methyl orange (MO), and Congo red dye using different type plasma discharge: non-thermal direct (Attri et al, 2016), indirect atmospheric pressure plasma jets (Ma et al, 2021;Yehia et al, 2020), gas-liquid pulsed discharge plasma (Sun et al, 2012) ect. The degradation efficiency was approximately 80-90% when the dyes were exposed to plasma for 20-30 min.…”

Section: Introductionmentioning

confidence: 99%

Plasma-Assisted Advanced Oxidation Process and Novel Materials for Water and Wastewater Treatment

Скіба

Пивоваров²

2020

WPT STN

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The rapid growth in world population brings with it the need for improvement in the current technology for water purification, in order to provide adequate potable water to everyone. The plasma-based advanced oxidation process (AOP) is one of the most widely studied and best developed processes owing to its environmental compatibility, simple structure, efficiencies and ease of operation. In this study, a plasma-based AOP was stably generated using contact non-equilibrium low-temperature plasma and plasma synthesized composite nanomaterials (TiO2/Ag NPs) for water and wastewater purification. The degradation efficiency of the pollutants was determined by UV–Vis absorption spectroscopy. It was found that, due to the simultaneous production of highly reactive species, plasmas can efficiently eliminate pollutants that are difficult to remove using conventional methods. Aqueous solutions of various pollutants were treated by a low-pressure discharge. Experimental results indicated that CNP was effective for degradation azo dye pollutants (methylene blue (MB) and methyl orange MO) and antibiotics (ofloxacin (OFX) and ciprofloxacin (CFX)): МВ and МО were degraded by 98.5% and 97.0%, respectively after 3 min of plasma treatment; OFX and CFX were degraded by ~95.0% and 80.0%, respectively AOP by CNP indicated. The photodegradation of methylene blue catalyzed by plasma synthesized TiO2/Ag was studied under UV irradiation. The degradation (~91%) was obtained with 2.4 g/L TiO2/Ag within 90 min irradiation.

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Development and Optimization of Single Filament Plasma Jets for Wastewater Decontamination

Cited by 6 publications

References 46 publications

Self-organization phenomena in cold atmospheric pressure plasma slit jet

Self-organization phenomena in cold atmospheric pressure plasma slit jet

Recent Progress in Applications of Atmospheric Pressure Plasma for Water Organic Contaminants’ Degradation

Plasma-Assisted Advanced Oxidation Process and Novel Materials for Water and Wastewater Treatment

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