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Processes
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Atmospheric Pressure Plasma Technologies and Applications
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Atmospheric Pressure Plasma Technologies and Applications

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 4141

Special Issue Editors

Dr. Evgenia Benova

E-Mail Website
Guest Editor
Plasma Technology Laboratory, Clean&Circle Center of Competence, University of Sofia, BG-1111 Sofia, Bulgaria
Interests: plasma physics; plasma modelling; microwave discharges; surface-wave-sustained plasma; plasma technology; biomedical, environmental and agro plasma applications
Prof. Dr. Frantisek Krcma

E-Mail Website
Guest Editor
Department of Physical and Consumer Chemistry, Faculty of Chemistry, Brno University of Technology, 61200 Brno, Czech Republic
Interests: plasma jets; physics; diagnostics and applications of plasma jets

Special Issue Information

Dear Colleagues,

In recent years, a large variety of plasma sources operating at atmospheric pressure have been developed. The ability of such sources to produce non-thermal (non-equilibrium) plasma with electron temperatures much higher than the temperatures of heavy particles (which can vary from room temperature to several thousand kelvins), opens up a wide research field for plasma applications in areas such as biology, medicine, agriculture, environmental protection and pollutant reduction. Plasma technology is gaining great attention as a “green” alternative, reducing the use of chemicals in many processes such as nanomaterials synthesis, surface treatment, disinfection, wound healing, and seeds decontamination. Since plasma is a complex system of charged particles (electrons and ions), chemically highly reactive radicals, excited atoms, and electromagnetic radiation including UV, the synergetic action of all these components makes plasma-based processes highly efficient and “clean” at the same time.

This Special Issue focuses on recent advances in atmospheric pressure plasma technologies and applications. You are invited to submit cutting-edge research, theoretical and experimental studies, as well as comprehensive reviews in this field.

Dr. Evgenia Benova
Prof. Dr. Frantisek Krcma
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • atmospheric pressure plasma
  • plasma technology
  • plasma applications
  • cold atmospheric pressure plasma
  • bio-medical plasma applications
  • plasma in agriculture
  • plasma technology in nanomaterials
  • plasmas with liquids

Published Papers (4 papers)

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Research

18 pages, 2147 KiB  
Article
Synergistic Effect of Plasma-Activated Water with Micro/Nanobubbles, Ultraviolet Photolysis, and Ultrasonication on Enhanced Escherichia coli Inactivation in Chicken Meat
by Kochakon Moonsub, Phisit Seesuriyachan, Dheerawan Boonyawan and Wassanai Wattanutchariya
Processes 2024, 12(3), 567; https://doi.org/10.3390/pr12030567 - 13 Mar 2024
Viewed by 769
Abstract
The use of integrated plasma-activated water (PAW) with micro/nanobubbles (MNBs), ultraviolet (UV) photolysis, and ultrasonication (US) for the synergistic efficiency of Escherichia coli inactivation in chicken meat was investigated. A 2k factorial design was employed to optimize the combined treatment parameters for [...] Read more.
The use of integrated plasma-activated water (PAW) with micro/nanobubbles (MNBs), ultraviolet (UV) photolysis, and ultrasonication (US) for the synergistic efficiency of Escherichia coli inactivation in chicken meat was investigated. A 2k factorial design was employed to optimize the combined treatment parameters for pathogen disinfection in Design of Experiments (DOE) techniques. Its effectiveness was evaluated based on electrical conductivity (EC), oxidation–reduction potential (ORP), hydrogen peroxide (H2O2) concentration, and E. coli inactivation. The most significant impact on E. coli reduction was observed for MNBs, UV treatment time, and their interaction (MNBs and UV). Optimal E. coli inactivation (6 log10 CFU/mL reduction) was achieved by combining PAW with MNB and UV for 10 and 20 min, respectively. Integrating PAW with appropriate supplementary technologies enhanced E. coli inactivation by 97% compared to PAW alone. This novel approach provides a promising alternative for pathogen control in chicken meat, potentially improving food safety and shelf life in the poultry industry. Full article
(This article belongs to the Special Issue Atmospheric Pressure Plasma Technologies and Applications)
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14 pages, 3248 KiB  
Article
The Effect of Low-Temperature Microwave Plasma on Wound Regeneration in Diabetic Rats
by Todor Bogdanov, Plamena Marinova, Lubomir Traikov, Pavlina Gateva, Theophil Sedloev, Andrey Petrov, Vlayko Vodenicharov, Rosen Georgiev, Dimitar Bakalov, Zafer Sabit, Radka Tafradjiiska-Hadjiolova and Todor Hikov
Processes 2023, 11(12), 3399; https://doi.org/10.3390/pr11123399 - 10 Dec 2023
Viewed by 845
Abstract
Impaired wound healing in diabetic individuals presents a significant clinical challenge, and this study explores the impact of low-temperature microwave plasma in an argon atmosphere, a type of cold atmospheric plasma (CAP), on wound regeneration in diabetic rats. The findings reveal that this [...] Read more.
Impaired wound healing in diabetic individuals presents a significant clinical challenge, and this study explores the impact of low-temperature microwave plasma in an argon atmosphere, a type of cold atmospheric plasma (CAP), on wound regeneration in diabetic rats. The findings reveal that this CAP treatment accelerates wound regeneration in diabetic rats, promoting faster wound closure, reducing inflammation, and enhancing critical regenerative processes such as angiogenesis, collagen synthesis, and extracellular matrix remodeling. Additionally, CAP exhibits anti-inflammatory effects by modulating the immune response towards a pro-regenerative state. These results underscore the potential of CAP in diabetic wound care, offering a promising approach to address delayed wound healing in diabetic patients and potentially improving the quality of life for those with chronic diabetic wounds. Full article
(This article belongs to the Special Issue Atmospheric Pressure Plasma Technologies and Applications)
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18 pages, 11216 KiB  
Article
Effects of Surface-Wave-Sustained Argon Plasma Torch Interaction with Liquids
by Plamena Marinova, Evgenia Benova, Yana Topalova, Yovana Todorova, Todor Bogdanov, Maya Zhekova, Ivaylo Yotinov and Frantisek Krcma
Processes 2023, 11(12), 3313; https://doi.org/10.3390/pr11123313 - 28 Nov 2023
Viewed by 747
Abstract
In this paper, an investigation of the interaction of a surface-wave-sustained argon plasma torch with liquids is presented. The plasma is produced by an electromagnetic wave traveling along the plasma–dielectric interface, and at the same time, the plasma is a part of this [...] Read more.
In this paper, an investigation of the interaction of a surface-wave-sustained argon plasma torch with liquids is presented. The plasma is produced by an electromagnetic wave traveling along the plasma–dielectric interface, and at the same time, the plasma is a part of this waveguide structure. Because the interaction of the plasma torch with water (liquid) results in modifications of the properties of both the treated water and the plasma itself, a detailed study of the effects in both media is required. The results of the experimental investigation of a surface-wave-sustained argon plasma torch interaction with liquids show significant changes in the plasma parameters, such as the electron excitation temperature Te and the average rotation temperature Trot. In addition, mechanical waves are produced both in the meniscus surface and in the plasma torch by the interaction between the plasma torch (ionized gas with charged particles and electric field) and the liquid surface, which is different from the effects produced by a neutral gas jet on a liquid surface. As a result of the plasma–water interaction, the water’s chemical and physical characteristics, such as the water conductivity, pH, and H2O2 concentration, are modified. As a possible application for water purification, the performed SWD treatment of model wastewater shows a significant variation in nitrate, ammonium, phosphate, and COD (chemical oxygen demand) concentration as a result of the treatment. Full article
(This article belongs to the Special Issue Atmospheric Pressure Plasma Technologies and Applications)
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17 pages, 11731 KiB  
Article
Comparison of the Bacterial Inactivation Efficiency of Water Activated by a Plasma Jet Source and a Pin-to-Pin Electrode Configuration Source
by Radovan Čobanović, Dejan Maletić, Sunčica Kocić-Tanackov, Ivana Čabarkapa, Bojana Kokić, Predrag Kojić, Slobodan Milošević, Višnja Stulić, Tomislava Vukušić Pavičić and Milan Vukić
Processes 2023, 11(12), 3286; https://doi.org/10.3390/pr11123286 - 24 Nov 2023
Cited by 1 | Viewed by 908
Abstract
In this comparative study, the bacterial inactivation efficiency of plasma-activated water (PAW) generated by two distinct plasma reactors, one utilizing a nitrogen plasma jet electrode and the other a hybrid argon plasma reactor, was explored. The present study involved the assessment of antimicrobial [...] Read more.
In this comparative study, the bacterial inactivation efficiency of plasma-activated water (PAW) generated by two distinct plasma reactors, one utilizing a nitrogen plasma jet electrode and the other a hybrid argon plasma reactor, was explored. The present study involved the assessment of antimicrobial activity against suspensions of three Gram-positive and three Gram-negative bacterial strains in their planktonic cell state. Bacterial suspensions were introduced into PAW five days after generation. Subsequently, the viability of the bacteria was assessed at various time intervals, specifically at 0.5, 1, 3, 5, 10, and 24 h, in order to evaluate the effect of inactivation. Structural changes in bacteria after PAW treatment were assessed using a scanning electron microscope (SEM). The physicochemical properties of PAW, including pH, conductivity, and concentrations of H2O2, NO2−, and NO3− during aging were measured. The present study demonstrated the effective inactivation of the tested bacterial strains by PAW. Gram-positive bacteria displayed greater resistance compared to Gram-negative species, with the lowest reductions in bacterial counts observed for B. cereus, and the highest for Escherichia coli O157:H7. Morphological damage was evident across all bacterial species examined. Physicochemical measurements showed slow decay of the reactive species in the aging process. This study illustrated the potential utility of PAW as an alternative disinfectant. Full article
(This article belongs to the Special Issue Atmospheric Pressure Plasma Technologies and Applications)
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