Mutual Interaction between Plasma Characteristics and Liquid Properties in AC-driven Pin-to-Liquid Discharge

Yoon, Seok–Jin; Jeon, Hyeongwon; Yi, Changho; Park, Seungil; Ryu, Seon Young; Kim, Seong Bong

doi:10.1038/s41598-018-30540-4

Cited by 28 publications

(17 citation statements)

References 18 publications

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“…The concentration of the NO 3 and NO 2 in the PTW was 5.2 and 0.1 mg•L −1 , respectively, while the K + concentration was 5.0 mg•L −1 (P < 0.05) (Table 1). As previously reported, NO 3 and NO 2 can be formed in PTW through the dissolution of nitrogen oxides (NO, NO 2 , and N 2 O 3 ) formed near the electrodes when a high electric discharge is applied to air [22][23][24][25] . The dissolution of the nitrogen oxides in the water contributes to the low pH of the PTW, which can be explained by the reaction between NO 2 and 16 .…”

Section: Resultsmentioning

confidence: 56%

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Growth and bioactive phytochemicals of Panax ginseng sprouts grown in an aeroponic system using plasma-treated water as the nitrogen source

Song

Jung

Jee

et al. 2021

Sci Rep

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Ginseng (Panax ginseng Meyer) sprouts are grown to whole plants in 20 to 25 days in a soil-less cultivation system and then used as a medicinal vegetable. As a nitrogen (N) source, plasma-treated water (PTW) has been used to enhance the seed germination and seedling growth of many crops but has not been investigated for its effects on ginseng sprouts. This study established an in-situ system for N-containing water production using plasma technology and evaluated the effects of the PTW on ginseng growth and its bioactive phytochemicals compared with those of an untreated control. The PTW became weakly acidic 30 min after the air discharge at the electrodes because of the formation of nitrate (NO3‒) and nitrite (NO2‒) in the water. The NO3‒ and NO2‒ in the PTW, together with potassium ions (K+), enhanced the shoot biomass of the ginseng sprout by 26.5% compared to the untreated control. The ginseng sprout grown in the PTW had accumulated more free amino acids and ginsenosides in the sprout at 25 days after planting. Therefore, PTW can be used as a liquid N fertilizer for P. ginseng growth and phytochemical accumulation during sprouting under aeroponic conditions.

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Section: Resultsmentioning

confidence: 56%

“…Recent studies have reported that plasma technology is a promising tool for in-situ production of N-containing water in food and agriculture 16,21 . In an apparatus for plasma treatment, a high electric discharge produces N-containing ions in water through the dissolution of nitrogen oxides generated near the electrodes during air discharge [22][23][24][25] .…”

mentioning

confidence: 99%

Growth and bioactive phytochemicals of Panax ginseng sprouts grown in an aeroponic system using plasma-treated water as the nitrogen source

Song

Jung

Jee

et al. 2021

Sci Rep

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“…the channel depth of the microfluidic device, is important in terms of breakdown voltage. With a small gap distance, lower breakdown voltage and higher discharge current is expected [55]. Hence decreasing the discharge gap from 100 to 50 µm, increases the power density in the discharge zone [56].…”

Section: Effect Of Channel Depthmentioning

confidence: 99%

A Microfluidic Atmospheric-Pressure Plasma Reactor for Water Treatment

Patinglag

Sawtell

Iles

et al. 2019

Plasma Chem Plasma Process

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A dielectric barrier discharge microfluidic plasma reactor, operated at atmospheric pressure, was studied for its potential to treat organic contaminants in water. Microfluidic technology represents a compelling approach for plasma-based water treatment due to inherent characteristics such as a large surface-area-to-volume ratio and flow control, in inexpensive and portable devices. The microfluidic device in this work incorporated a dielectric barrier discharge generated in a continuous gas flow stream of a two-phase annular flow regime in the microchannels of the device. Methylene blue in solution was used to investigate plasma induced degradation of dissolved organic compounds within the microfluidic device. The relative degradation rates of methylene blue were influenced by the residence time of the sample solution in the discharge zone, type of gas applied, channel depth and flow rate. Increasing the residence time inside the plasma region led to higher levels of degradation. Oxygen was found to be the most effective gas, with the spectra obtained using Liquid Chromatography-Mass Spectroscopy indicating the most significant degradation. By reducing the channel depth from 100 to 50 µm, the best results were obtained, achieving a greater than 97% level of methylene blue degradation. The microfluidic system presented here demonstrates proof-of-concept that plasma technology can be utilised as an advanced oxidation process for water treatment, with the potential to eliminate water treatment consumables such as filters and disinfectants.

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“…These reactive species, including reactive oxygen species (ROS) and reactive nitrogen species (RNS) are responsible for the chemical and biological effects of PAW. Various setups have been used for PAW generation, including plasma jet (Hamdan, Profili, & Cha, 2020), dielectric barrier discharge (DBD; Jin et al., 2020), corona or spark discharge (Lu, Boehm, Bourke, & Cullen, 2017; Piskarev, 2019), pin/pins in water discharge, or plasma discharge in water with gas bubbles (Yoon et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

Plasma‐activated water: Physicochemical properties, microbial inactivation mechanisms, factors influencing antimicrobial effectiveness, and applications in the food industry

Zhao

Patange

Sun

et al. 2020

Comp Rev Food Sci Food Safe

204

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Novel nonthermal inactivation technologies have been increasingly popular over the traditional thermal food processing methods due to their capacity in maintaining microbial safety and other quality parameters. Plasma-activated water (PAW) is a cutting-edge technology developed around a decade ago, and it has attracted considerable attention as a potential washing disinfectant. This review aims to offer an overview of the fundamentals and potential applications of PAW in the agri-food sector. A detailed description of the interactions between plasma and water can help to have a better understanding of PAW, hence the physicochemical properties of PAW are discussed. Further, this review elucidates the complex inactivation mechanisms of PAW, including oxidative stress and physical effect. In particular, the influencing factors on inactivation efficacy of PAW, including processing factors, characteristics of microorganisms, and background environment of water are extensively described. Finally, the potential applications of PAW in the food industry, such as surface decontamination for various food products, including fruits and vegetables, meat and seafood, and also the treatment on quality parameters are presented. Apart from decontamination, the applications of PAW for seed germination and plant growth, as well as meat curing are also summarized. In the end, the challenges and limitations of PAW for scale-up implementation, and future research efforts are also discussed. This review demonstrates that PAW has the potential to be successfully used in the food industry.

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Mutual Interaction between Plasma Characteristics and Liquid Properties in AC-driven Pin-to-Liquid Discharge

Cited by 28 publications

References 18 publications

Growth and bioactive phytochemicals of Panax ginseng sprouts grown in an aeroponic system using plasma-treated water as the nitrogen source

Growth and bioactive phytochemicals of Panax ginseng sprouts grown in an aeroponic system using plasma-treated water as the nitrogen source

A Microfluidic Atmospheric-Pressure Plasma Reactor for Water Treatment

Plasma‐activated water: Physicochemical properties, microbial inactivation mechanisms, factors influencing antimicrobial effectiveness, and applications in the food industry

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