Investigation of sterilization by a microwave-generated low-temperature atmospheric pressure plasma jet

Fu, Wenjie; Zhang, Chaoyang; Guan, Xiaotong; Li, Xiaoyun

doi:10.1080/08327823.2022.2029117

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…For example, He-H 2 or O 2 can be used as a plasma gas to disinfect water which was contaminated by Bacillus globigii spores [ 16 ]. A low-temperature microwave-generated atmospheric pressure plasma jet was developed to directly treat bacteria and reduce the number of bacteria to some extent [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Review and Perspective of Environmental Disinfection Technology Based on Microwave Irradiation

Wang

Laghari

et al. 2023

Curr Pollution Rep

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Purpose of Review In the context of COVID-19 sweeping the world, the development of microbial disinfection methods in gas, liquid, and solid media has received widespread attention from researchers. As a disinfection technology that can adapt to different environmental media, microwave-assisted disinfection has the advantages of strong permeability, no secondary pollution, etc. The purpose of this review is to put forward new development requirements for future microwave disinfection strategies by summarizing current microwave disinfection methods and effects. From the perspective of the interaction mechanism of microwave and microorganisms, this review provides a development direction for more accurate and microscopic disinfection mechanism research. Recent Findings Compared to other traditional environmental disinfection techniques, microwave-assisted disinfection means have the advantages of being more destructive, free of secondary contamination, and thorough. Currently, researchers generally agree that the efficiency of microwave disinfection is the result of a combination of thermal and non-thermal effects. However, the performance of microwave disinfection shows the differences in the face of different environmental media as well as different types of microorganisms. Summary This review highlights the inactivation mechanism of microwave-assisted disinfection techniques used in different scenarios. Suggestions for promoting the efficiency and overcoming the limitations of low energy utilization, complex reactor design, and inaccurate monitoring methods are proposed.

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Section: Introductionmentioning

confidence: 99%

A Review and Perspective of Environmental Disinfection Technology Based on Microwave Irradiation

Wang

Laghari

et al. 2023

Curr Pollution Rep

View full text Add to dashboard Cite

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A high-efficiency room-temperature surface wave plasma jet based on a rectangular waveguide

Huang,

Yang,

Peng

et al. 2024

Physics of Plasmas

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Microwave plasma jets have garnered significant attention due to their unique advantages and wide applications in numerous fields. However, the frequent collisions between electrons and neutral particles at atmospheric pressure make it challenging to generate a room-temperature plasma jet and maintain a high energy efficiency at the same time. This paper introduces a new microwave plasma jet based on a rectangular waveguide, which utilizes the surface wave propagating along the plasma jet to sustain the gas discharge. It features a simple structure, low power consumption, high energy efficiency, and strong controllability without the need for any external tuning measures. The minimum power required to ignite and stably maintain the plasma jet at atmospheric pressure is as low as 25 W and the measured lowest gas temperature at the plasma jet tail is approximately 295 K. Meanwhile, experiments show the microwave energy efficiency can be higher than 90% in a large range of input powers and gas inflow rates, while the gas temperature is maintained close to room temperature. These characteristics of our proposed surface wave plasma jet demonstrate tremendous potential in fields such as hemostasis, sterilization, wastewater treatment, semiconductor cleaning, and material processing.

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Enhancement of OH spectra in atmospheric pressure plasma jet by femtosecond laser

Lee,

Tran,

Hwang

et al. 2024

Physics of Plasmas

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A helium (He) atmospheric pressure plasma jet (APPJ) system with a single electrode was configured. A pulsed light of femtosecond (fs) laser was irradiated at the guided streamer of He APPJ through an objective lens to generate the laser induced plasma (LIP) inside the He APPJ. The optical emission spectra of LIP were measured as the light energy of the fs laser increased. The spectra of hydroxyl molecules and atomic oxygen were enhanced when the fs laser energy exceeded 114 μJ. The plasma parameters of LIP inside the APPJ were determined using He collisional-radiative model. Electron temperature and density increased to ∼7.2 eV and 1.7×1014 cm−3, respectively. The dominant processes underlying the enhancement were discussed in the interaction of fs laser and He APPJ.

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Investigation of sterilization by a microwave-generated low-temperature atmospheric pressure plasma jet

Cited by 4 publications

References 30 publications

A Review and Perspective of Environmental Disinfection Technology Based on Microwave Irradiation

A Review and Perspective of Environmental Disinfection Technology Based on Microwave Irradiation

A high-efficiency room-temperature surface wave plasma jet based on a rectangular waveguide

Enhancement of OH spectra in atmospheric pressure plasma jet by femtosecond laser

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