Article
Engineering, Environmental
Kui Zhang, Adam P. Harvey
Summary: CO2 can be converted to CO and O by non-thermal plasmas even in atmospheres with high O2 content. The conversion occurs at ambient pressure and temperature, opening up new possibilities for direct CO2 decomposition.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Jingyi Zhao, Ai Zhang, Paul Heroux, Zhuyu Sun, Yanan Liu
Summary: The study found that under certain conditions, dielectric barrier discharges (DBD) can efficiently degrade diesel-fuel-polluted soil, potentially becoming an effective remediation method. The degradation efficiency of diesel fuel is affected by factors such as soil depth and moisture, with high concentrations of diesel fuel being effectively removed through the action of alkyl radicals.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Food Science & Technology
Gabriela N. Pereira, Karina Cesca, Anelise Leal Vieira Cubas, Debora de Oliveira
Summary: Non-thermal plasma technology has been extensively studied and applied as an environmentally friendly technique for the clean treatment of lignocellulosic materials. Compared to traditional chemical pre-treatments, non-thermal plasma technology can reduce environmental pollution effectively, and is expected to be an efficient pretreatment method for producing high value-added products from large quantities of residues in the future.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2021)
Review
Chemistry, Physical
Asif Hussain Khoja, Arslan Mazhar, Faisal Saleem, Muhammad Taqi Mehran, Salman Raza Naqvi, Mustafa Anwar, Sehar Shakir, Nor Aishah Saidina Amin, Muhammad Bilal Sajid
Summary: Catalysts play a significant role in gas processing applications, but synthesizing high-quality catalysts remains a challenge. Non thermal plasma techniques are of great interest for controlling the physicochemical properties of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Yinyin Zhang, Han Zhang, Ai Zhang, Paul Heroux, Zhuyu Sun, Yanan Liu
Summary: Dielectric barrier discharge (DBD)-biochar sequential batch experimental technology was used to degrade atrazine (ATZ) in soil. DBD treatment increased the hydrophilicity, particle size, and instability of soil particles, leading to the exposure of residual ATZ. Biochar introduction compensated for the shortcomings of sole DBD treatment and enhanced ATZ removal efficiency. Proposed ATZ degradation mechanisms included various reactions, such as dealkylation, dechloro-hydroxylation, and alkylic-oxidation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Moritz Hitzemann, Christoph Schaefer, Ansgar T. Kirk, Alexander Nitschke, Martin Lippmann, Stefan Zimmermann
Summary: In this paper, a new and easy to assemble dielectric barrier discharge plasma ionization source is presented, which is based on printed circuit boards with two parallel isolated electrodes for generating plasma inside an inert fused silica capillary. The plasma source is coupled to an ion mobility spectrometer for demonstration. Different ionization pathways can be achieved by whether the analytes pass through the plasma or bypass it before entering the reaction region of the ion mobility spectrometer. The plasma source has been designed using electric field simulations and can reach detection limits in the mid pptv range.
ANALYTICA CHIMICA ACTA
(2023)
Article
Physics, Multidisciplinary
Henrike Jakob, Matthew Paliwoda, Joshua L. Rovey, Minkwan Kim
Summary: Water contaminants such as endocrine inhibitors, pharmaceuticals, and chlorine treatment by-products are identified as significant hazards to human health. Water adjacent plasma treatment is investigated as a more efficient and effective decontamination method. The degradation of methylene blue is measured to quantify the decontamination effectiveness.
Article
Engineering, Environmental
Cao Fang, Changsheng Shao, Shenhao Wang, Yahui Wu, Chao Liu, Qing Huang
Summary: Antibiotics are widely used and their discharge into the environment poses a constant potential threat to the ecosystem. This study focused on the treatment of wastewater containing levofloxacin and sulfadiazine, two typical antibiotics, using atmospheric-pressure dielectric barrier discharge (DBD). The results showed that the total antibiotics removal efficiency could be improved compared to separate single antibiotic treatment. The role of plasma-induced reactive oxygen/nitrogen species (RONS) was examined, with hydroxyl radicals (OH) playing a major role in levofloxacin degradation and ozone and peroxynitrite also contributing to sulfadiazine degradation. The bio-toxicity evaluation demonstrated the safety of the DBD degradation products for the ecological environment.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Qiancheng Wang, Ai Zhang, Pan Li, Paul H. Heroux, Han Zhang, Xin Yu, Yanan Liu
Summary: The study demonstrates that PS activated by DBD in combination with MBs can efficiently degrade ATZ in aqueous solutions, with a degradation efficiency of up to 89%. The heat generated by DBD benefits the removal of ATZ, while factors such as PS dosage, discharge power, and initial pH values have an impact on the effectiveness of ATZ removal. Furthermore, the presence of different ions can have varying effects on the degradation efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Yan Shao, Hongwei Guo, Zhaoqi Ji, Xiaoxia Ou, Huanhao Chen, Xiaolei Fan
Summary: Non thermal plasma (NTP) is a promising technology for degrading organic pollutants in water/wastewater, and the transfer of energetic species at the interface between gas discharge and liquid phase is crucial for improving degradation efficiency. This study developed an integrated system of dielectric barrier discharge (DBD) plasma and open-cell ceramic foam (CF) for the degradation of tetracycline hydrochloride (TCH) in liquid film. The results showed that the presence of a liquid film improved the propagation of homogeneous plasma discharge in the CF bed and enhanced the transfer of active species from plasma discharge to liquid, thereby improving the TCH degradation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Pranita Panda, Rajesh Kumar Mahanta, Suchitra Mohanty, Rita Paikaray, Smruti Prava Das
Summary: Non-thermal plasma technology, specifically dielectric barrier discharge (DBD) plasma, has been used to evaluate the feasibility of degrading VOCs such as toluene, benzene, and m-xylene in atmospheric pressure conditions. By analyzing post-plasma-treated by-products and studying degradation pathways, it was found that the degradation of VOCs to CO and CO2 was successful without the use of any catalyst, with higher degradation rates than expected. These findings could be valuable for VOC abatement using non-thermal plasma technology.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Analytical
Minsu Choi, Shin-Jae You, Jinwoo Jung, Changseok Cho, Yongshik Lee, Cheonyoung Kim, Jungje Ha, Hyunsoo Lee, Youbin Seol
Summary: This paper discusses the practical application of using plasma to reduce Radar Cross Section (RCS). Sustaining the discharge regardless of the aircraft's external environment and investigating the actual plasma parameters are essential for achieving practical implementation. Building upon previous studies, this research fabricates a DBD source suitable for dynamic environments and verifies the power consumption during one cycle of plasma generation. The results obtained are expected to contribute to the optimization of DBD electrodes for plasma RCS reduction.
Article
Engineering, Environmental
Guowei Ge, Hong Lei, Xiaomei Yao, Yingbo Fang, Xian Cheng
Summary: In this study, the catalyst FeOOH/gamma-Al2O3 was used in a dielectric barrier discharge (DBD) plasma-catalysis system for toluene degradation, and its catalytic performance and mechanism were investigated. The plasma-FeOOH/gamma-Al2O3 system showed significantly improved efficiency, energy yield, and selectivity compared to the plasma-only process. The decrease in ozone concentration in the plasma-FeOOH/gamma-Al2O3 system indicated the important role of ozone catalytic process in toluene degradation. The optimization of process parameters revealed that oxygen content in the background gas was the most significant factor affecting degradation efficiency of toluene.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Polymer Science
Choncharoen Sawangrat, Parichat Thipchai, Kannikar Kaewapai, Kittisak Jantanasakulwong, Jonghwan Suhr, Pitiwat Wattanachai, Pornchai Rachtanapun
Summary: The effect of argon and oxygen gases, as well as treatment times, on the properties of modified bamboo fibers using DBD plasma were investigated. Plasma treatment with inert gases generated ions and radicals on the fiber surface. Different spectroscopy and microscopy techniques confirmed changes in chemical composition, crystallinity, and surface roughness. Mechanical properties of the fiber-reinforced epoxy composites showed different trends with different plasma treatments and treatment times.
Article
Physics, Fluids & Plasmas
Tatiane F. Melo, Lucas C. Rocha, Clodomiro Alves Jr
Summary: In this study, the cold atmospheric plasma technique was used to treat seawater waste from salt production and desalination plants. The results showed that this technique has the potential to effectively extract and separate dissolved salts, resulting in a higher precipitation rate, smaller crystals, and different chemical compositions compared to traditional evaporation precipitation methods. These findings are encouraging for the recovery of these residues.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Engineering, Environmental
Matthieu Grao, James Redfern, Peter Kelly, Marina Ratova
Summary: In this study, a bespoke photocatalytic reactor was fabricated using readily available consumer market components and a bismuth titanate photocatalyst. The reactor showed efficient degradation capabilities for wastewater treatment, indicating its potential as a sustainable technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
S. B. Bell, T. Graening, A. Evans, P. Kelly, B. A. Pint, K. A. Kane
Summary: Cr-coated Zr-alloys are a cladding concept that can enhance reactor safety during accidents. The coating increases burst temperatures and reduces steam oxidation of the cladding, but may develop cracks in high strain regions resulting in rapid zirconia formation.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Physics, Fluids & Plasmas
F. Walk, R. Valizadeh, J. W. Bradley
Summary: The study investigated the time evolution of positive ion energy distribution functions at the substrate position in an asymmetric bipolar high-power impulse magnetron sputtering system. Results showed that by adjusting the positive voltage and negative pulse duration, it is possible to control and enhance the power density of ions bombarding a substrate, potentially leading to better tailoring of thin film properties.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Leticya Lais Coelho, Matthieu Grao, Thomas Pomone, Marina Ratova, Peter Kelly, Michaela Wilhelm, Regina de Fatima Peralta Muniz Moreira
Summary: In this study, asymmetric alumina flat membranes were coated with TiO(2) thin films of varying thickness for wastewater treatment. The coating showed the ability to degrade pollutants and restore membrane flux under UV irradiation, but it was ineffective in preventing membrane fouling under oily conditions.
Article
Infectious Diseases
Adele Evans, Anthony J. Slate, Millie Tobin, Stephen Lynch, Joels Wilson Nieuwenhuis, Joanna Verran, Peter Kelly, Kathryn A. Whitehead
Summary: The topographical features of surfaces affect the retention, distribution, density, dispersion, and clustering of bacteria. Differences in cellular grouping and surface topography influence the extent of bacterial retention on titanium surfaces.
Article
Materials Science, Multidisciplinary
Zhaohe Gao, Justyna Kulczyk-Malecka, Han Liu, Peter Kelly, Ping Xiao, Yu-Lung Chiu
Summary: Amorphous magnetron sputtered SiAlN films have been designed to prevent NaCl attack of Ti alloy substrates in high temperature humid air environments. The SiAlN coating forms a protective sodium silicate scale that slows down the diffusion of Na+ ions and provides good protection for SiAlN.
Review
Environmental Sciences
Thobile Zikhathile, Harrison Atagana, Joseph Bwapwa, David Sawtell
Summary: Healthcare risk waste (HCRW) treatment is crucial for protecting the environment and lives, but it also contributes to the healthcare sector's carbon footprint and climate change. Existing climate change mitigation strategies are insufficient, and all sectors, including healthcare, need to take action to prevent future harm.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Physical
Zhaohe Gao, Justyna Kulczyk-Malecka, Peter Kelly, Ping Xiao
Summary: The study shows that thin SiAlN coatings undergo ion-exchange reactions at high temperatures, resulting in gradual thinning of the coating and formation of oxide scales. Meanwhile, thick SiAlN coatings maintain a thicker residual layer under the same conditions, with no observable oxidation process.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Antia Villamayor, Thomas Pomone, Sergio Perero, Monica Ferraris, Victoria Laura Barrio, Eva G-Berasategui, Peter Kelly
Summary: High photocatalytic activity layers were obtained by combining a TiO2 nanostructured coating support with NiO layers synthesized by direct current (DC) magnetron sputtering. The TiO2 crystallinity was improved through the optimization of sputtering process parameters. The formation of a p-n heterojunction between the TiO2 and NiO layers significantly enhanced the degradation rates of methylene blue under UV light.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhaohe Gao, Han Liu, Justyna Kulczyk-Malecka, Conghui Liu, Dongchen Hu, Peter Kelly, Ping Xiao
Summary: The degradation rates of SiAlN coatings on pure Ti, Ti6Al4V, and Timetal 834 alloys were studied and compared at 800°C in air. The SiAlN coating on pure Ti showed depletion and formation of a thin oxide scale after 50 hours, while a 0.6 μm thick SiAlN coating without oxidation was observed on Timetal 834. Interfacial reactions between SiAlN coatings and substrates determined the degradation rates, with non-reactive alloying elements Sn and Al in Timetal 834 retarding the reactions and impeding coating degradation.
Article
Physics, Fluids & Plasmas
Marcus A. Law, Francis Lockwood Estrin, Paul M. Bryant, Mark D. Bowden, James W. Bradley
Summary: Using laser Thomson scattering (LTS) and 2D optical imaging, a fireball-like discharge is detected during the positive pulse period of bipolar voltage waveforms, indicating a possible unwanted effect in bipolar HiPIMS. These reverse discharges exhibit delayed establishment and are primarily located on the discharge centreline, attaching to the target and lasting until the end of the positive pulse. Measurements show dramatically increased electron heating and reduced electron densities during the fireball phase.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Swetha Suresh Babu, Martin Rudolph, Peter John Ryan, Joel Fischer, Daniel Lundin, James W. Bradley, Jon Tomas Gudmundsson
Summary: In this study, we compared the ionization region model (IRM) with experimental measurements to analyze particle densities and electron temperature in a high power impulse magnetron sputtering discharge. The semi-empirical model accurately predicted the temporal variations of various species densities and electron energy based on measured discharge current and voltage waveforms for a specific cathode target material. Although the model underestimated electron density and overestimated electron temperature, it successfully captured the temporal trends of species densities and electron temperature.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Xiang Peng, Song Xie, Shijian Xiong, Rong Li, Peng Wang, Xuming Zhang, Zhitian Liu, Liangsheng Hu, Biao Gao, Peter Kelly, Paul K. Chu
Summary: Combining electrocatalytic water splitting with waste iron upgrading reaction can improve energy conversion efficiency and achieve high-efficiency hydrogen production in neutral media. The heterostructured MoSe2/MoO2 on carbon cloth shows superior catalytic performance compared to commercial Pt/C catalyst at high current densities. Replacing conventional oxygen evolution reaction with waste iron upgrading reaction reduces the required potential by 95% for anodic current density of 10 mA cm-2. This work demonstrates energy-saving hydrogen production and pollutant recycling without carbon emission in a single system.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Zhaohe Gao, Xun Zhang, Sheng Cao, Justyna Kulczyk-Malecka, Shiying Qin, Xiaodong Liu, Peter Kelly, Xinhua Wu, Ping Xiao, Yu -Lung Chiu
Summary: A SiAlN/ Mo coating was directly deposited onto the as-built topographic surface of laser-based powder bed fusion manufactured Ti6Al4V alloy with high surface roughness and native oxide scale. After exposure to 800 degrees C for 10 cycles in air for 50 hours, the topographic surface of Ti6Al4V was well protected by the SiAlN/ Mo coatings without any spallation, cracks, or oxidation. The conformal nature of the sputtered SiAlN/Mo coatings allowed for a good coverage of the topographic surface, and the diffusion of Mo through the thin native oxide scale resulted in a strong chemical bonding between the coatings and Ti substrates.
Article
Engineering, Environmental
Wenhao Deng, Baochai Xu, Qiangqiang Zhao, Song Xie, Weihong Jin, Xuming Zhang, Biao Gao, Zhitian Liu, Zaenab Abd-Allah, Paul K. Chu, Xiang Peng
Summary: This work aims to construct an efficient OER electrocatalyst through precise control of the C=N vacancies in NiFe- and NiCo-Prussian blue analogs, leading to outstanding OER characteristics and improved energy conversion efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)