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Razavi Rad SA, Khani M, Hatami H, Shafiee M, Shokri B. Parametric investigation and RSM optimization of DBD plasma methods (direct & indirect) for H 2S conversion in the air. Heliyon 2024; 10:e29068. [PMID: 38660250 PMCID: PMC11039977 DOI: 10.1016/j.heliyon.2024.e29068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/28/2024] [Accepted: 03/29/2024] [Indexed: 04/26/2024] Open
Abstract
Hydrogen sulfide (H2S) is known as a harmful pollutant for the environment and human health, and its emission control is a high priority. Non-thermal plasma is an effective technology in this field. In this study, for the first time, the performance of direct and indirect H2S plasma conversion methods was compared, optimized, and modeled with the CCD method. H2S was diluted in zero air, and the study investigated the effect of discharge power, relative humidity, total flow rate, initial H2S concentration, and their interactions. ANOVA results showed that the models for H2S conversion efficiency and energy yield were significant and efficient. The direct method achieved a maximum conversion efficiency of 56 % and energy yield of 3.43 g/kWh, while the indirect method produced 68 % conversion efficiency and 1.59 g/kWh energy yield. According to the process optimization results, the direct conversion method is more optimal than the indirect conversion method due to the presence of active species and high-energy electrons in the plasma treatment, and it is a better choice if there are suitable working conditions.
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Affiliation(s)
| | - Mohammadreza Khani
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Hadi Hatami
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Mojtaba Shafiee
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Babak Shokri
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
- Department of Physics, Shahid Beheshti University, Tehran, Iran
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Shen X, Yang Y, Zhang J, He F. Design of a multi-electrode dielectric barrier discharge reactor and experimental study on the degradation of atrazine in water. Environ Sci Pollut Res Int 2024:10.1007/s11356-024-33450-3. [PMID: 38683430 DOI: 10.1007/s11356-024-33450-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 04/19/2024] [Indexed: 05/01/2024]
Abstract
Atrazine (ATZ) is widely used in agriculture as a triazine herbicide, and its long-term use can cause serious environmental pollution. This paper independently designed a multi-electrode reactor, explored the output power and energy utilization efficiency of the dielectric barrier discharge reactor, and used the dielectric barrier discharge reactor to treat ATZ solution. The results showed that the degradation efficiency of ATZ was 96.39% at 30 min at an initial ATZ concentration of 14 mg/L, an input voltage of 34 kV, an input current of 1.38 mA, an aeration rate of 100 L/h, and a treatment water volume of 150 mL. The degradation of ATZ was significantly increased by the addition of persulfate (PS), Fe2+, and H2O2. After adding radical quenchers (EtOH, p-BQ, and FFA), the degradation efficiency of ATZ decreased, indicating that free radicals (•OH, •O2-, and 1O2) played a key role in the degradation process of ATZ.
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Affiliation(s)
- Xinjun Shen
- School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, People's Republic of China.
| | - Yuncui Yang
- School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, People's Republic of China
| | - Jing Zhang
- School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, People's Republic of China
| | - Fan He
- School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, People's Republic of China
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Sima J, Wang J, Song J, Du X, Lou F, Zhu Y, Lei J, Huang Q. Efficient degradation of polystyrene microplastic pollutants in soil by dielectric barrier discharge plasma. J Hazard Mater 2024; 468:133754. [PMID: 38394892 DOI: 10.1016/j.jhazmat.2024.133754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024]
Abstract
In this study, the atmospheric dielectric barrier discharge (DBD) plasma was proposed for the degradation of polystyrene microplastics (PS-MPs) for the first time, due to its ability to generate reactive oxygen species (ROS). The local temperature in plasma was found to play a crucial role, as it enhanced the degradation reaction induced by ROS when it exceeded the melting temperature of PS-MPs. Factors including applied voltage, air flow rate, and PS-MPs concentration were investigated, and the degradation products were analyzed. High plasma energy and adequate supply of ROS were pivotal in promoting degradation. At 20.1 kV, the degradation efficiency of PS-MPs reached 98.7% after 60 min treatment, with gases (mainly COx, accounting for 96.4%) as the main degradation products. At a concentration of 1 wt%, the PS-MPs exhibited a remarkable conversion rate of 90.6% to COx, showcasing the degradation performance and oxidation degree of this technology. Finally, the degradation mechanism of PS-MPs combined with the detection results of ROS was suggested. This work demonstrates that DBD plasma is a promising strategy for PS-MPs degradation, with high energy efficiency (8.80 mg/kJ) and degradation performance (98.7% within 1 h), providing direct evidence for the rapid and comprehensive treatment of MP pollutants.
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Affiliation(s)
- Jingyuan Sima
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jun Wang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China; Jiaxing Research Institute, Zhejiang University, Jiaxing 314000, China
| | - Jiaxing Song
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xudong Du
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
| | - Fangfang Lou
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
| | - Youqi Zhu
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jiahui Lei
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
| | - Qunxing Huang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
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Liang Y, Zheng L, Yang Y, Zheng X, Xiao D, Ai B, Sheng Z. Dielectric barrier discharge cold plasma modifies the multiscale structure and functional properties of banana starch. Int J Biol Macromol 2024; 264:130462. [PMID: 38423435 DOI: 10.1016/j.ijbiomac.2024.130462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/13/2024] [Accepted: 02/24/2024] [Indexed: 03/02/2024]
Abstract
Banana starch has attracted significant attention due to its abundant content of resistant starch. This study aims to compare the multiscale structure and functional properties of banana starch obtained from five cultivated varieties and investigate the impact of dielectric barrier discharge cold plasma (DBD) treatment on these starch characteristics. All five types of natural banana starch exhibited an elliptical and irregular shape, conforming to the CB crystal structure, with a bimodal distribution of branch chain lengths. The resistant starch content ranged from 88.9 % to 94.1 %. Variations in the amylose content, amylopectin branch chain length distribution, and structural characteristics resulted in differences in properties such as gelatinization behavior and sensitivity to DBD treatment. The DBD treatment inflicted surface damage on starch granules, reduced the amylose content, shortened the amylopectin branch chain length, and changed the relative crystallinity to varying degrees. The DBD treatment significantly increased starch solubility and light transmittance. Simultaneously, it resulted in a noteworthy decrease in peak viscosity and gelatinization enthalpy of starch paste. The in vitro digestibility test showed that 76.2 %-86.5 % of resistant starch was retained after DBD treatment. The DBD treatment renders banana starch with reduced viscosity, increased paste transparency, enhanced solubility, and broadens its potential application.
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Affiliation(s)
- Yonglun Liang
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Agricultural Product Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong 524001, China
| | - Lili Zheng
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Haikou Key Laboratory of Banana Biology, Haikou, Hainan 571101, China
| | - Yang Yang
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Haikou Key Laboratory of Banana Biology, Haikou, Hainan 571101, China
| | - Xiaoyan Zheng
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Haikou Key Laboratory of Banana Biology, Haikou, Hainan 571101, China
| | - Dao Xiao
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Haikou Key Laboratory of Banana Biology, Haikou, Hainan 571101, China
| | - Binling Ai
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Haikou Key Laboratory of Banana Biology, Haikou, Hainan 571101, China.
| | - Zhanwu Sheng
- Agricultural Product Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong 524001, China.
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Hatami H, Khani M, Razavi Rad SA, Shokri B. CO 2 conversion in a dielectric barrier discharge plasma by argon dilution over MgO/HKUST-1 catalyst using response surface methodology. Heliyon 2024; 10:e26280. [PMID: 38384532 PMCID: PMC10878997 DOI: 10.1016/j.heliyon.2024.e26280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 02/02/2024] [Accepted: 02/09/2024] [Indexed: 02/23/2024] Open
Abstract
Metal-organic frameworks (MOFs) as carbon dioxide adsorption in combination with metal oxides have shown catalyst application in CO2 conversion. Herein, the MgO/HKUST-1 catalyst is synthesized to direct conversion of CO2 upon dilution by argon in a cylindrical dielectric barrier discharge (DBD) reactor. A water-cooling circulation adjusts the reactor temperature, and aluminum powder is used as a high-voltage electrode. The effect of the discharge power, feed flow rate, CO2 fraction, and their interaction in plasma and plasma catalyst method on CO2 conversion (R1), effective CO2 conversion (R2), and energy efficiency (R3) is evaluated by central composite design (CCD) based on response surface methodology. The Analysis of Variance (ANOVA) results demonstrate that the quadratic regression model describes CO2 conversion and effective CO2 conversion, and the reduced cubic model describes energy efficiency. The results indicate that the method (plasma, plasma catalyst) and discharge power on R1 and R2 have a considerable effect. Also, the method and CO2 fraction on R3 have the greatest impact, respectively. In the plasma and plasma catalyst method maximum CO2 conversion is 12.3% and 20.5% at a feed flow rate of 80 ml/min, CO2 fraction of 50%, and discharge power of 74 W.
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Affiliation(s)
- Hadi Hatami
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Mohammadreza Khani
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | | | - Babak Shokri
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
- Department of Physics, Shahid Beheshti University, Tehran, Iran
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Yu X, Li S, Jiao Y, Ren Y, Kou Y, Dang X. Impact of the geometric structure parameter on the performance of dielectric barrier reactor for toluene removal. Environ Sci Pollut Res Int 2024; 31:982-994. [PMID: 38030837 DOI: 10.1007/s11356-023-31238-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 11/21/2023] [Indexed: 12/01/2023]
Abstract
The reasonable geometry design of non-thermal plasma (NTP) reactor is significant for its performance. However, optimizing the reactor structure has received insufficient attention in the studies on removing volatile organic compounds by NTP. Several dielectric barrier discharge (DBD) reactors with various barrier thicknesses and discharge gaps were designed, and their discharge characteristics and toluene degradation performance were explored comprehensively. The number and intensity of current pulses, discharge power, emission spectrum intensity and gas temperature of the DBD reactors increased as barrier thickness decreased. The toluene removal efficiency and mineralization rate increased from 23.2-87.1% and 5.3-27.9% to 81.7-100% and 15.9-51.3%, respectively, when the barrier thickness reduced from 3 to 1 mm. With the increase of discharge gap, the breakdown voltage, discharge power, gas temperature and residence time increased, while the discharge intensity decreased. The reactor with the smallest discharge gap (3.5 mm) exhibited the highest toluene removal efficiency (78.4-100%), mineralization rate (15.6-40.9%) and energy yield (8.4-18.7 g/kWh). Finally, the toluene degradation pathways were proposed based on the detected organic intermediates. The findings can provide critical guidance for designing and optimizing of DBD reactor structures.
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Affiliation(s)
- Xin Yu
- School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 710055, Shaanxi Province, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
| | - Shijie Li
- School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 710055, Shaanxi Province, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
| | - Yang Jiao
- School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 710055, Shaanxi Province, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
| | - Yitong Ren
- School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 710055, Shaanxi Province, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
| | - Yongkang Kou
- School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 710055, Shaanxi Province, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China
| | - Xiaoqing Dang
- School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 710055, Shaanxi Province, China.
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China.
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture & Technology, Yanta Road, No. 13, Xi'an, 71005, Shaanxi Province, China.
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Aggelopoulos CA, Dolinski O. A comprehensive insight on plasma-catalytic degradation of organic pollutants in water: Comparison between ZnO and TiO 2. Chemosphere 2024; 347:140667. [PMID: 37951406 DOI: 10.1016/j.chemosphere.2023.140667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/30/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
A novel system combining underwater plasma bubbles and high voltage nanopulses was combined for the first time with ZnO and TiO2 for the degradation of organic pollutants in water. The effect of catalyst loading, discharge power and plasma gas on pollutant degradation was investigated whereas the plasma-catalytic mechanism was explored through the quantification of plasma species, COD/TOC measurements and scavenging experiments in the presence and absence of catalysts. The increased efficiency in the presence of either ZnO or TiO2, especially under plasma gases (air and oxygen) able to produce UV radiation in the range of wavelengths absorbed by both catalysts, lies on the increased concentration of the critical reactive species (e.g. ·O2-, ·ΟΗ, H2O2). Compared to plasma alone process, H2O2 was significantly enhanced in the presence of TiO2 and decreased in the presence of ZnO, whereas ·OH concentration was higher in the plasma-ZnO but lower in the plasma-TiO2 system which supports the overall superior performance of ZnO compared to TiO2. The synergy of plasma-ZnO process compared to that of plasma-TiO2 was ∼2.4 and ∼1.5 times higher for Orange II (OII) and Methylene Blue (MB), respectively, exhibiting a very low electrical energy per order (1.4 kWh m-3 for OII and 0.31 kWh m-3 or MB). The present effort contributes on providing fundamental insights and further expand of plasma-catalysis for water treatment.
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Affiliation(s)
- C A Aggelopoulos
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504, Patras, Greece.
| | - O Dolinski
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504, Patras, Greece
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Tian Q, Wang M, Li H, Huan Z, Wang M, Lin J, Li B, Han B. Hyphenated liquid electrode glow discharge- dielectric barrier discharge molecular emission spectrometry for determination of dithiocarbamates. Food Chem 2023; 429:136884. [PMID: 37478600 DOI: 10.1016/j.foodchem.2023.136884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/07/2023] [Accepted: 07/12/2023] [Indexed: 07/23/2023]
Abstract
A hyphenated liquid electrode glow discharge (LEGD)-dielectric barrier discharge (DBD) molecular emission spectrometer was constructed and used as a novel liquid chromatography (LC) detector for dithiocarbamates (DTC) determination. The LEGD was used as an acidolysis reactor for the in-situ transformation of DTCs into CS2 with high efficiencies of 74.11-97.98%. The DBD was used to excite CS2 gas to generate a specific molecular emission at 257.94 nm. The linear correlation coefficient of the method was > 0.99 from 1 to 200 μg mL-1. The detection limits ranged from 0.1 to 0.3 μg mL-1 with 76-119% recovery and relative standard deviations of 0.2-8.5%. Moreover, the hyphenated microplasma spectrometer achieved low power consumption, low temperature, immediate acidolysis, and high transformational efficiency, and can detect each DTC when combined with LC.
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Affiliation(s)
- Qiaoxia Tian
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China; Hainan Institute for Food Control, Haikou, 570311, Hainan, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Meiran Wang
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China
| | - Haoyue Li
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China; Hainan Institute for Food Control, Haikou, 570311, Hainan, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Zhibo Huan
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China
| | - MingYue Wang
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China
| | - Jingling Lin
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China.
| | - Bei Li
- Hainan Institute for Food Control, Haikou, 570311, Hainan, China.
| | - Bingjun Han
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China.
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Chen Y, He Y, Jin T, Dai C, Xu Q, Wu Z. Bactericidal effect of low-temperature atmospheric plasma against the Shigella flexneri. Biomed Eng Online 2023; 22:119. [PMID: 38071319 PMCID: PMC10709968 DOI: 10.1186/s12938-023-01185-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Shigella flexneri (S. flexneri) is a common intestinal pathogenic bacteria that mainly causes bacillary dysentery, especially in low socioeconomic countries. This study aimed to apply cold atmospheric plasma (CAP) on S. flexneri directly to achieve rapid, efficient and environmentally friendly sterilization. METHODS The operating parameters of the equipment were determined by plasma diagnostics. The plate count and transmission electron microscope were employed to calculate bacterial mortality rates and observe the morphological damage of bacterial cells. Measurement of intracellular reactive oxygen species (ROS) and superoxide anions were detected by 2,7-dichlorodihydrofluorescein (DCFH) and Dihydroethidium fluorescence probes, respectively. The fluorescence intensity (a. u.) reflects the relative contents. Additionally, the experiment about the single effect of temperature, ultraviolet (UV), and ROS on bacteria was conducted. RESULTS The peak discharge voltage and current during plasma operation were 3.92kV and 66mA. After discharge, the bacterial mortality rate of 10, 20, 30 and 40 s of plasma treatment was 60.71%, 74.02%, 88.11% and 98.76%, respectively. It was shown that the intracellular ROS content was proportional to the plasma treatment time and ROS was the major contributor to bacterial death. CONCLUSION In summary, our results illustrated that the plasma treatment could inactivate S. flexneri efficiently, and the ROS produced by plasma is the leading cause of bacterial mortality. This highly efficient sterilization method renders plasma a highly promising solution for hospitals, clinics, and daily life.
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Affiliation(s)
- Yan Chen
- Joint Laboratory of Plasma Application Technology, Institute of Advanced Technology, University of Science and Technology of China, Hefei, China
| | - Yuanyuan He
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
- Department of Geriatrics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Tao Jin
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - Chenwei Dai
- Anhui Academy of Medical Sciences, Hefei, China
| | - Qinghua Xu
- Anhui Academy of Medical Sciences, Hefei, China.
| | - Zhengwei Wu
- Joint Laboratory of Plasma Application Technology, Institute of Advanced Technology, University of Science and Technology of China, Hefei, China.
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China.
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10
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Nawaz MI, Yi C, Zafar AM, Yi R, Abbas B, Sulemana H, Wu C. Efficient degradation and mineralization of aniline in aqueous solution by new dielectric barrier discharge non-thermal plasma. Environ Res 2023; 237:117015. [PMID: 37648191 DOI: 10.1016/j.envres.2023.117015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/21/2023] [Accepted: 08/27/2023] [Indexed: 09/01/2023]
Abstract
Aniline is a priority pollutant that is unfavorable to the environment and human health due to its carcinogenic and mutagenic nature. The performance of the dielectric barrier discharge reactor was examined based on the aniline degradation efficiency. Different parameters were studied and optimized to treat various wastewater conditions. Role of active species for aniline degradation was investigated by the addition of inhibitors and promoters. The optimum conditions were 20 mg/L initial concentration, 1.8 kV applied voltage, 4 L/min gas flow rate and a pH of 8.82. It was observed that 87% of aniline was degraded in 60 min of dielectric barrier discharge treatment at optimum conditions. UV-Vis spectra showed gradual increase in the treatment efficiency of aniline with the propagation of treatment time. Mineralization of AN was confirmed by TOC measurement and a decrease in pH during the process. To elicit the aniline degradation route, HPLC and LC-MS techniques were used to detect the intermediates and byproducts. It was identified that aniline degraded into different organic byproducts and was dissociated into carbon dioxide and water. Comparison of the current system with existing advanced oxidation processes showed that DBD has a remarkable potential for the elimination of organic pollutants.
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Affiliation(s)
- Muhammad Imran Nawaz
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Chengwu Yi
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Abdul Mannan Zafar
- Civil and Environmental Engineering Department, United Arab Emirates University, AlAin, 15551, United Arab Emirates; Biotechnology Research Center, Technology Innovation Institute, Masdar, 9639, Abu Dhabi, United Arab Emirates.
| | - Rongjie Yi
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Babar Abbas
- Department of Environmental Engineering, University of Engineering and Technology, Taxila, 47080, Pakistan.
| | - Husseini Sulemana
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Chundu Wu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
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11
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Guragain RP, Baniya HB, Guragain DP, Pradhan SP, Subedi DP. From seed to sprout: Unveiling the potential of non-thermal plasma for optimizing cucumber growth. Heliyon 2023; 9:e21460. [PMID: 37954337 PMCID: PMC10637995 DOI: 10.1016/j.heliyon.2023.e21460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/16/2023] [Accepted: 10/21/2023] [Indexed: 11/14/2023] Open
Abstract
Background and aims Numerous strategies for enhancing seed germination and growth have been employed over the decades. Despite these advancements, there continues to be a demand for more effective techniques, driven by the growing global population. Recently, various forms of non-thermal atmospheric pressure plasma have garnered attention as environmentally friendly, safe, and cost-effective methods to enhance the agricultural and food sectors. This study explores the remarkable impact of non-thermal plasma (NTP) treatment on cucumber (Cucumis sativus L.) seed germination. Methods A cost-effective, custom-designed power supply operating at line frequency was used for treating seeds, with exposure times ranging from 1 to 7 min. Various germination parameters, including water contact angle measurements, mass loss, water imbibition rate, and seedling length, were evaluated to assess the impact of plasma treatment on seed germination. Results Cucumber seeds exposed to NTP treatment for 3 min and 5 min durations showed significant germination improvements, notably a 57.9 ± 4.25 % higher final germination percentage, 14.5 ± 3.75 % reduced mean germination time, and a remarkable 90.6 ± 4.64 % increase in germination index compared to the control. These results suggest that NTP treatment enhanced seed coat permeability, triggered essential biochemical processes, and expedited water absorption and nutrient assimilation, ultimately fostering faster and more synchronized germination. Conclusions Our findings underscore the potential of NTP as an innovative approach to improving seed germination in agricultural practices.
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Affiliation(s)
| | - Hom Bahadur Baniya
- Department of Physics, Amrit Campus, Tribhuvan University, Kathmandu, Nepal
| | - Deepesh Prakash Guragain
- Department of Electronics and Communication, Nepal Engineering College, Pokhara University, Changunarayan, Bhaktapur, Nepal
| | - Suman Prakash Pradhan
- Department of Environmental Science and Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
| | - Deepak Prasad Subedi
- Department of Physics, School of Science, Kathmandu University, Dhulikhel, Kavre, Nepal
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12
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Hu S, Jin X, Chen X, Lv B, Xi W, Lan Y, Han W, Xu Z, Cheng C. Butachlor (BTR) degradation by dielectric barrier discharge plasma in soil: Affecting factors, degradation route, and toxicity assessment. Chemosphere 2023:139414. [PMID: 37423413 DOI: 10.1016/j.chemosphere.2023.139414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/29/2023] [Accepted: 07/02/2023] [Indexed: 07/11/2023]
Abstract
Over the past few decades, the frequent and excessive usage of pesticides has had detrimental effects on the soil and other habitats. In terms of removing organic contaminants from soil, non-thermal plasma has become one of the most competitive advanced oxidation methods. The study used dielectric barrier discharge (DBD) plasma to repair soil contaminated by butachlor (BTR). BTR degradation was investigated in actual soil under various experimental parameters. According to the results, DBD plasma treatment at 34.8 W destroyed 96.10% of BTR within 50 min, and this degradation was consistent with the model of first order kinetics. Boosting the discharge power, lowering the initial BTR concentration, using appropriate soil moisture content and air flow rate, and using oxygen as the working gas for discharge are all beneficial to the degradation of BTR. The changes in soil dissolved organic matter (DOM) before and after plasma treatment were assessed using a total organic carbon (TOC) analyzer. A Fourier transform infrared (FTIR) spectroscopy and an Ultra Performance Liquid Chromatography Tandem Mass Spectrometry (UPLC-MS) were employed to investigate the degradation of BTR. A wheat growth test showed that the best growth was achieved at 20 min of plasma soil remediation, but too long treatment would lower soil pH and thus affect wheat growth.
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Affiliation(s)
- Shuheng Hu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, PR China
| | - Xin Jin
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, PR China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Xueyan Chen
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, PR China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Bin Lv
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, PR China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Wenhao Xi
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Yan Lan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China; Institute of Health and Medical Technology/Anhui Province Key Laboratory of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China; Institute of Energy, Hefei Comprehensive National Science Center, Hefei, 230031, PR China
| | - Wei Han
- Institute of Health and Medical Technology/Anhui Province Key Laboratory of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Zimu Xu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, PR China.
| | - Cheng Cheng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China; Institute of Energy, Hefei Comprehensive National Science Center, Hefei, 230031, PR China.
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13
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Kyere-Yeboah K, Qiao XC. Non-thermal plasma activated peroxide and percarbonate for tetracycline and oxytetracycline degradation: Synergistic performance, degradation pathways, and toxicity evaluation. Chemosphere 2023; 336:139246. [PMID: 37330069 DOI: 10.1016/j.chemosphere.2023.139246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/30/2023] [Accepted: 06/15/2023] [Indexed: 06/19/2023]
Abstract
Tetracycline (TC) and Oxytetracycline (OTC) are common antibiotics increasingly detected in the environment, posing a potential risk to human and aquatic lives. Although conventional methods such as adsorption and photocatalysis are used for the degradation of TC and OTC, they are inefficient in removal efficiency, energy yield, and toxic byproduct generation. Herein, a falling-film dielectric barrier discharge (DBD) reactor coupled with environmentally friendly oxidants (hydrogen peroxide (HPO), sodium percarbonate (SPC), and HPO + SPC) was applied, and the treatment efficiency of TC and OTC was investigated. Experimental results showed that moderate addition of the HPO and SPC exhibited a synergistic effect (SF > 2), significantly improving the antibiotic removal ratio, total organic removal ratio (TOC), and energy yield by more than 50%, 52%, and 180%, respectively. After 10 min of DBD treatment, the introduction of 0.2 mM SPC led to a 100% antibiotic removal ratio and a TOC removal of 53.4% and 61.2% for 200 mg/L TC and 200 mg/L OTC, respectively. Also, 1 mM HPO dosage led to 100% antibiotic removal ratios after 10 min of DBD treatment and a TOC removal of 62.4% and 71.9% for 200 mg/L TC and 200 mg/L OTC, respectively. However, the DBD + HPO + SPC treatment method had a detrimental effect on the performance of the DBD reactor. After 10 min of DBD plasma discharge, the removal ratios for TC and OTC were 80.8% and 84.1%, respectively, when 0.5 mM HPO +0.5 mM SPC was added. Moreover, principal component and hierarchical cluster analysis confirmed the differences between the treatment methods. Furthermore, the concentration of oxidant-induced in-situ generated ozone and hydrogen peroxide were quantitatively determined, and their indispensable roles during the degradation process were established via radical scavenger tests. Finally, the synergetic antibiotic degradation mechanisms and pathways were proposed, and the toxicities of the intermediate byproducts were evaluated.
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Affiliation(s)
- Kwasi Kyere-Yeboah
- School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiu-Chen Qiao
- School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
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14
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Cheng JH, Li J, Sun DW. Effects of dielectric barrier discharge cold plasma on structure, surface hydrophobicity and allergenic properties of shrimp tropomyosin. Food Chem 2023; 409:135316. [PMID: 36621166 DOI: 10.1016/j.foodchem.2022.135316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 12/16/2022] [Accepted: 12/22/2022] [Indexed: 12/25/2022]
Abstract
Effects of dielectric barrier discharge (DBD) cold plasma (CP) on structure, surface hydrophobicity and allergenic properties of tropomyosin (TM) in shrimp were investigated in this study. Results showed that the molecular weight of TM increased and the protein concentration decreased with CP treatment time increased. The content of free amino acids was increased by 74.7 % and the distribution of aromatic amino acids was altered. The content of α-helix was decreased by 69 % and the surface hydrophobicity increased by 57.8 % after 20 min treatment. Allergenicity analysis showed that the IgE binding capacity decreased by 96 % after 20 min treatment, and the degranulation indexes of KU812 cells like the β-HEX release rate, the intracellular calcium ion intensity, the release of histamine and inflammatory cytokines (IL-4, TNF-α) were decreased by 32.5 %, 31.0 %, 37.3 %, 51.7 %, and 70.2 %, respectively. The current study confirmed that DBD CP could reduce the TM allergenicity through structural changes.
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Affiliation(s)
- Jun-Hu Cheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Jilin Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
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15
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Liu X, Cheng G, Yang C, Wang G, Li S, Li Y, Zheng H, Hu S, Zhu Z. Ultraviolet assisted liquid spray dielectric barrier discharge plasma-induced vapor generation for sensitive determination of arsenic by atomic fluorescence spectrometry. Talanta 2023; 257:124339. [PMID: 36801565 DOI: 10.1016/j.talanta.2023.124339] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
In this study, a novel sensitive method for As determination by atomic fluorescence spectrometry was developed based on UV-assisted liquid spray dielectric barrier discharge (UV-LSDBD) plasma-induced vapor generation. It was found that prior-UV irradiation greatly facilitates As vapor generation in LSDBD likely because of the increased generation of active substances and the formation of As intermediates with UV irradiation. The experimental conditions affecting the UV and LSDBD processes (such as formic acid concentration, irradiation time, the flow rates of sample, argon and hydrogen) were optimized in detail. Under the optimum conditions, As signal measured by LSDBD can be enhanced by about 16 times with UV irradiation. Furthermore, UV-LSDBD also offers much better tolerance to coexisting ions. The limit of detection was calculated to be 0.13 μg L-1 for As, and the relative standard deviation of the repeated measurements was 3.2% (n = 7). The accuracy and effectiveness of this new method were further verified by the analysis of simulated natural water reference sample and real water samples. In this work, UV irradiation was utilized for the first time as an enhancement strategy for PIVG, which opens a new approach for developing green and efficient vapor generation methods.
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Affiliation(s)
- Xing Liu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Guo Cheng
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Chun Yang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Guan Wang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Shuyang Li
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Yixiao Li
- Yiwu Academy of Science & Technology for Inspection & Quarantine, Yiwu 322000, China
| | - Hongtao Zheng
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Shenghong Hu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Zhenli Zhu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China; State Environmental Protection Key Laboratory of Source Appointment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, China.
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16
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Li Z, Sueha Y, Zhu X, Sun B. High efficiency and rapid treatment of naproxen sodium wastewater by dielectric barrier discharge coupled with catalysis. Environ Sci Pollut Res Int 2023; 30:66291-66302. [PMID: 37095217 DOI: 10.1007/s11356-023-27125-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/16/2023] [Indexed: 05/03/2023]
Abstract
Pharmaceutical wastewater has the characteristics of high organic concentration and poor biodegradability, which will cause serious environmental pollution when discharged into water bodies. In this work, naproxen sodium was used to simulate pharmaceutical wastewater by dielectric barrier discharge technology. The effects of dielectric barrier discharge (DBD) and combined catalysis on the removal of naproxen sodium solution were studied. The removal effect of naproxen sodium was affected by discharge conditions, including discharge voltage, frequency, air flow rate and electrode materials. It was found that the highest removal rate of naproxen sodium solution was 98.5%, when the discharge voltage was 7000 V, the frequency was 3333 Hz, and the air flow rate was 0.3 m3/h. In addition, the effect of the initial conditions of naproxen sodium solution was studied. The removal of naproxen sodium was relatively effective at low initial concentrations as well as under the condition of weak acid or near-neutral solution. However, the initial conductivity of naproxen sodium solution had little effect on the removal rate. The removal effect of naproxen sodium solution was compared by using catalyst combined with DBD plasma and DBD plasma alone. x%La/Al2O3, Mn/Al2O3 and Co/Al2O3 catalysts were added. The removal rate of naproxen sodium solution reached the highest after adding 14%La/Al2O3 catalyst, which played the best synergistic effect. The removal rate of naproxen sodium was 18.4% higher than that without catalyst. The results showed that the combination of DBD and La/Al2O3 catalyst may be a promising method to remove naproxen sodium efficiently and quickly. And this method is a new attempt to treat naproxen sodium.
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Affiliation(s)
- Zhi Li
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Youamivang Sueha
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Xiaomei Zhu
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China.
| | - Bing Sun
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
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17
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Sun H, Liu J, Mao X, Wang C, Zhao Y, Qian Y. Rapid detection of ultratrace urinary arsenic by direct sampling microplasma vaporization based on silicon nitride. Anal Chim Acta 2023; 1251:341008. [PMID: 36925294 DOI: 10.1016/j.aca.2023.341008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/17/2023] [Accepted: 02/23/2023] [Indexed: 02/25/2023]
Abstract
At present, immediate monitoring urinary arsenic is still a challenge for treating arsenic poisoning patients. Thus, a fast, reliable and accurate analytical approach is indispensable to monitor ultratrace arsenic in urine sample for health warning. In this work, a silicon nitride (SN) rod was first integrally utilized as a sample carrier for ≤50 μL urinary aliquot, an electric heater for removing water and ashing sample as well as a high voltage electrode for dielectric barrier discharge vaporization (DBDV). The direct analytical method of arsenic in urine without sample digestion was thus developed using atomic fluorescence spectrometer (AFS) as a model detector. After 4 V electrically heating the SN rod for 60 s, urine sample was dehydrated and ashed outside; then, DBD was exerted under 0.8 A with 0.8 L/min H2 + Ar (1:9, v:v) for 20 s to vaporize arsenic analyte from the SN rod. After optimization, 0.014 μg/L arsenic detection limit (LOD) was reached with favorable analytical precision (RSD <5%) and accuracy (91-110% recoveries) for real sample analysis. As a result, the whole analysis process only consumes <3 min to exclude complicated sample preparation; furthermore, the designed DBDV system only occupies 25 W and <2 kg, which renders a miniature sampling component to hyphenate with a miniature detector to detect arsenic. Thus, this direct sampling DBDV method extremely fulfills the fast, sensitive and precise detection of ultratrace arsenic in urine sample.
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Affiliation(s)
- Huifang Sun
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, And Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Jixin Liu
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, And Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China; Beijing Ability Technology Company, Limited, Beijing, 100081, China.
| | - Xuefei Mao
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, And Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
| | - Chunhui Wang
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, And Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Yabo Zhao
- Beijing Ability Technology Company, Limited, Beijing, 100081, China
| | - Yongzhong Qian
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, And Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
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18
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Zhang L, Guo Y, Tie J, Yao Z, Feng Z, Wu Q, Wang X, Luo H. Grating-like DBD plasma for air disinfection: Dose and dose-response characteristics. J Hazard Mater 2023; 447:130780. [PMID: 36669408 DOI: 10.1016/j.jhazmat.2023.130780] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/02/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Atmospheric pressure dielectric barrier discharge (DBD) plasma is an emerging technique for effective bioaerosol decontamination and is promising to be used in indoor environments to reduce infections. However, fundamental knowledge of the dose and dose-response characteristics of plasma-based disinfection technology is very limited. By examining the single-pass removal efficiency of S. lentus aerosol by in-duct grating-like DBD plasma reactors with varied discharge setups (gap distance, electrode size, number of discharge layers, frequency, dielectric material), it was found that the specific input energy (SIE) could be served as the dose for disinfection, and the efficiency was exponentially dependent on SIE in most cases. The corresponding susceptibility constants (Z values) were obtained hereinafter. Humidity was a prominent factor boosting the efficiency with a Z value of 0.36 L/J at relative humidity (RH) of 20% and 1.68 L/J at RH of 60%. MS2 phage showed a much higher efficiency of 2.66-3.08 log10 of reduction than those of S. lentus (38-85%) and E. coli (42%-95%) under the same condition. Using SIE as the dose, the performance of plasma reactors in the literature was compared and evaluated. This work provides a theoretical and engineering basis for air disinfection by plasma-based technology.
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Affiliation(s)
- Liyang Zhang
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Yuntao Guo
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China.
| | - Jinfeng Tie
- Disinfection and Infection Control, Chinese PLA Center for Disease Prevention and Control, Beijing 100071, China.
| | - Zenghui Yao
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Zihao Feng
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Qiong Wu
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Xinxin Wang
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Haiyun Luo
- Department of Electrical Engineering, Tsinghua University, Beijing 100084, China.
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19
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Wang X, Jin A, Zhu M, Feng C, He H, Huang Z, Li K, Wang L. Study on low-temperature plasma γ-Al 2O 3 catalytic viscosity reduction of polyacrylamide solution. Environ Sci Pollut Res Int 2023; 30:36098-36111. [PMID: 36539660 DOI: 10.1007/s11356-022-24735-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
The wide use of polyacrylamide (PAM) in enhanced oil recovery generates a large amount of polymer-bearing wastewater featuring high viscosity and difficult viscosity reduction, making the treatment of wastewater increasingly difficult. In this paper, the experimental study on reducing the viscosity of wastewater containing polyacrylamide by using the plasma generated by dielectric barrier discharge (DBD) and the synergistic effect of catalyst γ-Al2O3 is carried out. The law of plasma reducing the viscosity of wastewater containing polyacrylamide is studied under the different conditions of amounts of γ-Al2O3 catalyst, discharge voltages, and initial concentrations of polyacrylamide-containing wastewater. The mechanism of viscosity reduction of polyacrylamide is studied through environmental scanning electron microscope (ESEM), Fourier transform infrared (FTIR) spectrometer, and X-ray photoelectron spectroscopy (XPS). The results show that the catalytic viscosity reduction is the best when the discharge voltage is 18 kV and the discharge time is 15 min. With the increase in the input of the γ-Al2O3 catalyst, the viscosity of the PAM solution decreases gradually. When the amount of γ-Al2O3 is 375 mg, the shear rate changes from 0.5 1/sec to 28 1/sec, and the viscosity of the solution containing polyacrylamide changes from 434.5 mPa·s to 40.2 mPa·s. The viscosity reduction rate of the PAM solution is 90.7%. After the catalytic viscosity reduction, the functional groups of polyacrylamide do not change much. The elemental composition of the catalyst has not changed, which is still Al, C, and O.
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Affiliation(s)
- Xiaobing Wang
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China.
| | - An Jin
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Meng Zhu
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Chen Feng
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Hao He
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Zhigang Huang
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Kaifeng Li
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Lu Wang
- School of Petroleum Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
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20
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Zorzi V, Berardinelli A, Gozzi G, Ragni L, Vannini L, Ceccato R, Parrino F. Combined effect of atmospheric gas plasma and UVA light: A sustainable and green alternative for chemical decontamination and microbial inactivation of fish processing water. Chemosphere 2023; 317:137792. [PMID: 36640987 DOI: 10.1016/j.chemosphere.2023.137792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The simultaneous use of UVA light irradiation coupled with low energy cold plasma generated by a dielectric barrier discharge prototype, results in significant enhancement of efficiency of the integrated process with respect to the sole plasma treatment. This effect has been demonstrated both on microbial inactivation of a food-borne pathogen, i.e. Listeria monocytogenes, and on the degradation of a compound of biological origin such as phenylalanine. In the latter case, the analysis of its reaction intermediates and the spectroscopic identification and quantification of peroxynitrites, allowed to propose mechanistic hypotheses on the nature of the observed synergistic effects. Moreover, it has been demonstrated that the process does not affect the quality of trout fillets, indicating its suitability as a chlorine-free, green, and sustainable tool for the decontamination of fish processing water.
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Affiliation(s)
- Vittorio Zorzi
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - Annachiara Berardinelli
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy; Center Agriculture Food Environment - C3A, University of Trento, Via E. Mach 1, 38010 S, Michele All'Adige (TN), Italy
| | - Giorgia Gozzi
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, P.zza Goidanich 60, Cesena (FC), Italy
| | - Luigi Ragni
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, P.zza Goidanich 60, Cesena (FC), Italy; Inter-Departmental Centre for Agri-Food Industrial Research, Alma Mater Studiorum, University of Bologna, Via Q. Bucci 336, Cesena (FC), Italy
| | - Lucia Vannini
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, P.zza Goidanich 60, Cesena (FC), Italy; Inter-Departmental Centre for Agri-Food Industrial Research, Alma Mater Studiorum, University of Bologna, Via Q. Bucci 336, Cesena (FC), Italy
| | - Riccardo Ceccato
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - Francesco Parrino
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy.
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21
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Zhang S, Liu Z, Li S, Zhang S, Fu H, Tu X, Xu W, Shen X, Yan K, Gan P, Feng X. Remediation of lindane contaminated soil by fluidization-like dielectric barrier discharge. J Hazard Mater 2023; 443:130164. [PMID: 36308938 DOI: 10.1016/j.jhazmat.2022.130164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/05/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
This study proposed the fluidization-like dielectric barrier discharge (DBD) plasma for the remediation of lindane contaminated soil and integrated physical and chemical reaction pathway. Soil particle distribution within the reactor was simulated with Euler-Euler and Gidaspow drag models, and a bipolar pulsed power supply was applied to energize the DBD reactor after full fluidized. The effect of soil particles movement on electric features was discussed in terms of voltage waveforms and Lissajous figures. Lindane degradation was found to be related to electrics parameters and soil properties. Soil samples before and after treatment were analyzed by XRD and SEM methods. A 95.98% lindane decomposition and 0.66 mgLindane/h average reaction rate were obtained with 3 wt% CaO injection by pulse power drove fluidization-like DBD after 32 min treatment. Ozone was proved to play a major role during lindane degrading by plasma. The reaction potential pathway of lindane decomposition contains 4 steps, including dehydrogen, dehydrochlorination, and dechlorination, respectively.
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Affiliation(s)
- Shuo Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhen Liu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Shuran Li
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Shihao Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hui Fu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xuan Tu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wenyi Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xing Shen
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Keping Yan
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030002, China
| | - Ping Gan
- State Environmental Protection Engineering Technology Center for Industrial Contaminated Site and Groundwater Remediation, Cecep Dadi (Hangzhou) Environmental Remediation Co., Ltd, Hangzhou 310017, China
| | - Xiujuan Feng
- The School of Mines, China University of Mining and Technology, Xuzhou 221116, China
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22
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Zhang L, Guo Y, Chang X, Yao Z, Wei X, Feng Z, Zhang D, Zhou Q, Wang X, Luo H. In-duct grating-like dielectric barrier discharge system for air disinfection. J Hazard Mater 2022; 435:129075. [PMID: 35650753 PMCID: PMC9072810 DOI: 10.1016/j.jhazmat.2022.129075] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/01/2022] [Accepted: 05/02/2022] [Indexed: 05/04/2023]
Abstract
In the context of spreading Coronavirus disease 2019 (COVID-19), the combination of heating, ventilation, and air-conditioning (HVAC) system with air disinfection device is an effective way to reduce transmissible infections. Atmospheric-pressure non-equilibrium plasma is an emerging technique for fast pathogen aerosol abatement. In this work, in-duct disinfectors based on grating-like dielectric barrier discharge (DBD) plasmas with varied electrode arrangements were established and evaluated. The highest airborne bacterial inactivation efficiency was achieved by 'vertical' structure, namely when aerosol was in direct contact with the discharge region, at a given discharge power. For all reactors, the efficiency was linearly correlated to the discharge power (R2 =0.929-0.994). The effects of environmental factors were examined. Decreased airflow rates boosted the efficiency, which reached 99.8% at the velocity of 0.5 m/s with an aerosol residence time of ~3.6 ms. Increasing humidity (relative humidity (RH)=20-60%) contributed to inactivation efficacy, while high humidity (RH=70%-90%) led to a saturated efficiency, possibly due to the disruption of discharge uniformity. As suggested by the plasma effluent treatment and scavenger experiments, gaseous short-lived chemical species or charged particles were concluded as the major agents accounting for bacterial inactivation. This research provides new hints for air disinfection by DBD plasmas.
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Affiliation(s)
- Liyang Zhang
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Yuntao Guo
- Department of Electrical Engineering, Tsinghua University, Beijing, China.
| | - Xuanyu Chang
- Marine Design and Research Institute of China (MARIC), Shanghai, China
| | - Zenghui Yao
- School of Electrical and Electronic Engineering, North China Electric Power University, Beijing, China
| | - Xiaodong Wei
- Marine Design and Research Institute of China (MARIC), Shanghai, China
| | - Zihao Feng
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Dongheyu Zhang
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Qun Zhou
- Department of Chemistry, Tsinghua University, Beijing, China
| | - Xinxin Wang
- Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Haiyun Luo
- Department of Electrical Engineering, Tsinghua University, Beijing, China.
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23
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Jiang N, Qu Y, Yu Z, Peng B, Li J, Shang K, Lu N, Wu Y. p-Nitrophenol contaminated soil remediation in a spray-type coaxial cylindrical dielectric barrier discharge plasma system. Environ Sci Pollut Res Int 2022; 29:58110-58120. [PMID: 35362884 DOI: 10.1007/s11356-022-19912-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
In the present work, plasma remediation of p-nitrophenol (PNP) contaminated soil was performed in a novel spray-type coaxial cylindrical dielectric barrier discharge (DBD) system at ambient temperature. This system is capable of generating large-size nonthermal plasma (NTP) and improving the diffusion and transfer of chemical active species around the dispersed soil particles. Several key parameters including plasma treatment time, discharge voltage, soil granular size, the entry speed of soil, PNP initial concentration, gas variety, and gas flow rate were investigated in terms of PNP degradation and energy efficiencies. Under the optimized experimental conditions, 54.2% of PNP was degraded after only 50 s discharge treatment, indicating that the spray-type coaxial cylindrical DBD system can degrade organic pollutants in soil more quickly compared to other plasma systems due to its efficient transfer of reactive oxygen and nitrogen species (RONS) into the contaminated soil. The possible PNP degradation pathways were proposed based on intermediates identification results and the role of reactive species analysis. The toxicological assessment of the PNP decomposition products was conducted by quantitative structure-activity relationship (QASR) analysis. This work is expected to provide a potential plasma technology for rapid and efficient processing of industrial organic pollutants contamination soil.
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Affiliation(s)
- Nan Jiang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China.
- Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China.
| | - Ying Qu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China
| | - Zheng Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China
| | - Bangfa Peng
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Jie Li
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Kefeng Shang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Na Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Yan Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China
- Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
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24
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Bouza M, García-Martínez J, Gilbert-López B, Moreno-González D, Rocío-Bautista P, Parras-Guijarro D, Sánchez-Vizcaino A, Brandt S, García-Reyes JF, Molina-Díaz A, Franzke J. Liquid Chromatography- Dielectric Barrier Discharge Ionization Mass Spectrometry for the analysis of neutral lipids of archaeological interest. J Sep Sci 2022; 45:3105-3114. [PMID: 35801641 PMCID: PMC9544991 DOI: 10.1002/jssc.202200402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 11/15/2022]
Abstract
Dielectric barrier discharge ionization has gained attention in the last few years due to its versatility and the vast array of molecules that can be ionized. In this study, we report on the assessment of liquid chromatography coupled to dielectric barrier discharge ionization with mass spectrometry for neutral lipid analysis. A set of different neutral lipid subclasses (triacylglycerides, diacylglycerides, and sterols) were selected for the study. The main species detected from our ionization source were [M‐H2O+H]+, [M+H]+ or [M‐R‐H2O+H]+, attributed to sterol dehydration, protonation or the fragmentation of an acyl chain accompanied by a water loss of the glycerolipids, respectively. In terms of sensitivity, the dielectric barrier discharge displayed overall improved abundances and comparable or better limits of quantitation than atmospheric pressure chemical ionization for both acylglycerols and sterols. As a case study, different archaeological samples with variable content in neutral lipids, particularly triacylglycerides, were studied. The identification was carried out by combining accurate mass and the tentative formula associated with the exact mass, retention time matching with standards, and additional structural information from in‐source fragmentation. The high degree of unsaturation and the presence of sterols revealed the potential vegetal origin of the material stored in the analyzed samples.
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Affiliation(s)
- Marcos Bouza
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Julio García-Martínez
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Bienvenida Gilbert-López
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain.,University Research Institute for Olives Grove and Olive Oil, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - David Moreno-González
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Priscilla Rocío-Bautista
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - David Parras-Guijarro
- University Research Institute for Iberian Archaeology, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Alberto Sánchez-Vizcaino
- University Research Institute for Iberian Archaeology, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Sebastian Brandt
- ISAS-Leibniz Institut für Analytische Wissenschaften, Bunsen-Kirchhoff-Str. 11, 44139, Dortmund, Germany
| | - Juan F García-Reyes
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain.,University Research Institute for Olives Grove and Olive Oil, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain.,University Research Institute for Iberian Archaeology, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Antonio Molina-Díaz
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain.,University Research Institute for Olives Grove and Olive Oil, University of Jaén, Campus Las Lagunillas, Jaén, 23071, Spain
| | - Joachim Franzke
- ISAS-Leibniz Institut für Analytische Wissenschaften, Bunsen-Kirchhoff-Str. 11, 44139, Dortmund, Germany
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25
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Huang Y, Guo D, Chen Y, Xu Y, Chen H, Dong X, Li S. Catalytic degradation of dinotefuran by dielectric barrier discharge plasma combined with La-doping TiO 2. Environ Technol 2022; 43:2380-2390. [PMID: 33487132 DOI: 10.1080/09593330.2021.1880488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
Degradation of neonicotinoid insecticide dinotefuran (DIN) in dielectric barrier discharge (DBD) non-thermal plasma combined with lanthanum-doped titanium dioxide (La-TiO2) system was investigated. A La-TiO2 catalyst was prepared by the sol-gel method and characterized by SEM, XRD, and DRS. The effects of various factors (initial concentration, initial pH, input power, and addition of metal ions) on the removal rate of DIN were evaluated. The results indicated that when the initial concentration, input power, initial pH, and Fe2+ catalyst ions were 100 mg/L, 150 W, 10.5 and 50 mg/L, respectively, the DIN degradation efficiency was improved to 99.0% by coupling 10 wt% La-TiO2 at 180 min. La-TiO2 showed excellent catalytic performance on DIN degradation in a DBD system. The removal rate decreased with the presence of H2O2 and a scavenger, manifesting that HO∙ plays an imperative role in the degradation process. Furthermore, intermediate products were analyzed by MS and the possible degradation pathway of DIN was proposed.
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Affiliation(s)
- Yixuan Huang
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
| | - Dan Guo
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
| | - Yongyang Chen
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
| | - Yanjia Xu
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
| | - Hao Chen
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
| | - Xiaochun Dong
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
| | - Shanping Li
- School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Qingdao, People's Republic of China
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26
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Zhang A, Zhou Y, Li Y, Liu Y, Li X, Xue G, Miruka AC, Zheng M, Liu Y. Motivation of reactive oxygen and nitrogen species by a novel non-thermal plasma coupled with calcium peroxide system for synergistic removal of sulfamethoxazole in waste activated sludge. Water Res 2022; 212:118128. [PMID: 35131628 DOI: 10.1016/j.watres.2022.118128] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/07/2022] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
Large amounts of antibiotics are concentrated in waste activated sludge (WAS) and released into the environment. It is thus critical to develop advanced sludge treatment technology to remove these antibiotics. Dielectric barrier discharge (DBD) combined with calcium peroxide (CaO2), as an innovative technology to attenuate sulfamethoxazole (SMX) in sludge, was investigated. Evident synergistic effects between DBD and CaO2 were observed on the SMX degradation with a synergistic factor of 2.02. Moreover, the energy consumption of DBD/CaO2 was significantly lower than that of DBD alone. At a typical CaO2 dosage of 0.1 g/g TS and discharge power of 64.5 W, the highest SMX removal of 96% was achieved within 50 min. The synergistic effects of DBD/CaO2 could be associated with the base catalysis of H2O2 and O3, UV-base-photolysis, peroxone oxidation, and photocatalytic H2O2. DBD/CaO2 generated various reactive oxygen species (ROS) and nitrogen species (RNS) that participated in SMX removal. The contributions of these reactive species followed the sequence of e- > •OH > •O2- > 1O2 > ONOO-. Based on the detected transformation by-products and their variations during treatment, a plausible SMX degradation pathway in sludge was proposed. Besides, DBD/CaO2 also promoted sludge disintegration, dewatering, heavy metal removal, sludge reduction, sludge solubilization, and acetate-enriched volatile fatty acid (VFA) production. Therefore, DBD/CaO2 exhibited great potential for controlling antibiotic, as well as promoting sludge reduction, decontamination, and resourcization.
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Affiliation(s)
- Ai Zhang
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Yongquan Zhou
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Yongmei Li
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, Kay Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yanbiao Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Xiang Li
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Gang Xue
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Andere Clement Miruka
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
| | - Ming Zheng
- Department of Civil & Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; Key Laboratory of Organic Compound Pollution Control Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
| | - Yanan Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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27
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Qin C, Jiang C, Guo M, Liu R, Yu R, Huang J, Yan D, Li S, Dang X. Dielectric barrier discharge coupled with Fe 2+, Mn 2+ and Cu 2+ scrubbing for toluene removal. Chemosphere 2022; 290:133306. [PMID: 34922966 DOI: 10.1016/j.chemosphere.2021.133306] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/09/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
By-product ozone emission is one of the challenges for applying dielectric barrier discharge (DBD) technology for volatile organic compounds (VOCs) removal. In this study, a DBD reactor followed by a wet scrubber (WS) containing a solution of metal ions (Fe2+/Mn2+/Cu2+) was used to reuse ozone for further oxidation of typical VOC toluene. Compared with the degradation effect of the DBD reactor alone, DBD coupled WS/iron system not only improved the toluene removal efficiency but also significantly reduced the ozone emission. The ozone removal efficiency reached as high as 98% in the DBD coupled WS/Fe2+ system. Electron paramagnetic resonance (EPR) tests showed that ozone was converted into radicals such as hydroxyl radicals in Fe2+ and Cu2+ solution, which further oxidized toluene in WS/iron. Quenching experiments showed that the contribution for toluene degradation by radicals was up to 75% and 62% in Fe2+ and Mn2+ reactor, respectively. This study demonstrates that the DBD coupled WS system has the potential to be an environmentally friendly technology for gaseous VOCs removal.
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Affiliation(s)
- Caihong Qin
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Chaochao Jiang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Mengke Guo
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Rongrong Liu
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Rui Yu
- Research Center of Air Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Jiayu Huang
- Research Center of Air Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Dongjie Yan
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Shijie Li
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Xiaoqing Dang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China.
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28
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Yang J, Zeng D, Hassan M, Ma Z, Dong L, Xie Y, He Y. Efficient degradation of Bisphenol A by dielectric barrier discharge non-thermal plasma: Performance, degradation pathways and mechanistic consideration. Chemosphere 2022; 286:131627. [PMID: 34311400 DOI: 10.1016/j.chemosphere.2021.131627] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
The discharge of recalcitrant and persistent organic pollutants into the environment and subsequent adverse impacts on the ecosystem has aroused a great concern all over the world. In this study, dielectric barrier discharge (DBD) non-thermal plasma was employed to eliminate bisphenol A (BPA). The influences of several vital experimental parameters, including discharge voltage, initial pH of solution, and rate of water flow on degradation of BPA, were explored in detail. In addition, the real wastewater from pharmaceutical factory was utilized to test the oxidation performance of DBD system. 96.8% chemical oxygen demand removal was achieved using DBD system. Radical quenching experiment as well as electron paramagnetic resonance test demonstrated that •OH was the main reactive oxygen species for the degradation of BPA. Moreover, eight major BPA degradation intermediates were identified by UPLC-MS. Ultimately, based on the UPLC-MS test results, a possible degradation pathway of BPA was proposed.
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Affiliation(s)
- Jingren Yang
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Deqian Zeng
- Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Muhammad Hassan
- Department of Ecology & Chemical Engineering, South Ural State University, Chelyabinsk, 454080, Russia
| | - Zhongbao Ma
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lingqian Dong
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yu Xie
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yiliang He
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
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29
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Liu J, Ji Y, Zhu S, Guo T, Xu L, Dong J, Cheng P. C-dot doping for enhanced catalytic performance of TiO 2/5A for toluene degradation in non-thermal plasma-catalyst system. Environ Sci Pollut Res Int 2022; 29:2480-2492. [PMID: 34374012 DOI: 10.1007/s11356-021-15840-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Non-thermal plasma (NTP) is gaining attention as a powerful tool to induce various reactions. The combination of NTP with catalysts has been successfully used to degrade volatile organic compounds (VOCs) for pollution control. In this study, a series of TiO2-C/5A catalysts, synthesized by carbon dots (C-dots) that decorate TiO2 by sol-gel and wetness impregnation methods, were incorporated with a dielectric barrier discharge (DBD) reactor in a single-stage structure to degrade toluene at atmospheric pressure and room temperature. A proton-transfer reaction mass spectrometer and a CO2 analyzer were used to monitor the concentration variations of organic by-products and CO2 online. The effects of input power, mass ratio of C-dots/TiO2 (TiO2/5A (0 wt%), TiO2-C1/5A (2.5 wt%), TiO2-C2/5A (5 wt%), TiO2-C3/5A (10 wt%)), gas flow rate, initial concentration of toluene on the toluene degradation efficiency, and CO2 selectivity were studied. The plasma-catalyst hybrid system could effectively improve the energy efficiency and reaction selectivity, attaining a maximum toluene degradation efficiency of 99.6% and CO2 selectivity of 83.0% compared to 79.5% and 37.5%, respectively, using the conventional plasma alone. Moreover, the generation of organic by-products also declined dramatically, averaging only half as much in plasma alone. The results also indicated that the appropriate amount of C-dot doping could greatly improve the catalyst efficiency in the hybrid plasma system. This is because the interaction between C-dots and TiO2 favors the formation of photoelectron holes and reduces the energy band gap and the recombination rate of photogenerated electron holes, which facilitates the generation of more active species on the catalyst surface, thereby leading to a more effective degradation reaction. These observations will provide guidance for the interaction studies between NTP and catalysts, not only for the exploration of new chemical mechanisms of aromatic compounds, but also for the screening of favorable materials for the desired reactions.
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Affiliation(s)
- Jixing Liu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Yanyan Ji
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Shuping Zhu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Teng Guo
- Institute of Environment Safety and Pollution Control, Jinan University, Guangzhou, 510632, China
| | - Li Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Junguo Dong
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Ping Cheng
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
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Zhu D, Chen Z, Li J, Wu Z, Gao E, Wang W, Yao S. Evaluation of Au/γ-Al 2O 3 nanocatalyst for plasma-catalytic decomposition of toluene. Chemosphere 2021; 285:131474. [PMID: 34329130 DOI: 10.1016/j.chemosphere.2021.131474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 07/06/2021] [Accepted: 07/06/2021] [Indexed: 05/26/2023]
Abstract
The emission of toluene into the atmosphere can seriously affect the environmental quality and endanger human health. A dielectric barrier discharge reactor filled with a small amount of Au nanocatalysts was used to decompose toluene in He and O2 gases mixtures at room temperature and atmospheric pressure. Normally, the oxidation of toluene using Au nanocatalysts suffers from low reaction activity and facile catalyst deactivation. Herein, the effects of Au loading, calcination time and calcination temperature were systematically investigated. It was found that 0.1 wt%Au/γ-Al2O3 calcined at 300 °C for 5 h can keep an average size around 6 nm with good dispersion on γ-Al2O3 surface and display the best catalytic performance. Moreover, the influences of energy density, gas flow rate, toluene concentration and O2 concentration on toluene degradation using 0.1 wt%Au/γ-Al2O3 were evaluated. It showed the best catalytic performance of near 100% conversion for toluene degradation under the reaction conditions of the energy density was 20 J/L, the gas flow rate was 300 mL/min, the concentration of toluene was 376 mg/m3 and the oxygen content was 10%. Combining experimental results and theoretical calculations, the values of reaction constant k were 8.6 × 10-5, 3.53 × 10-5 and 3.09 × 10-5 m6/(mol*J), when O2 concentration, power or flow rate changed, respectively. Therefore, O2 concentration has the greatest effect on toluene decomposition compared to other factors in the presence of Au/γ-Al2O3.
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Affiliation(s)
- Dandan Zhu
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China
| | - Zhizong Chen
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, 310018, China; Focused Photonics (Hangzhou) Inc., Zhejiang, 310052, China
| | - Jing Li
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China.
| | - Zuliang Wu
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China; School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, 310018, China
| | - Erhao Gao
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China
| | - Wei Wang
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China
| | - Shuiliang Yao
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China; School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, 310018, China.
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31
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Deng Y, Li K, Hou X, Jiang X. Flow injection hydride generation and on-line W-coil trapping for electrothermal vaporization dielectric barrier discharge atomic emission spectrometric determination of trace cadmium. Talanta 2021; 233:122516. [PMID: 34215131 DOI: 10.1016/j.talanta.2021.122516] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 04/16/2021] [Accepted: 04/24/2021] [Indexed: 10/21/2022]
Abstract
A fast, low-cost and sensitive method for the determination of trace cadmium was developed by using a miniaturized dielectric barrier discharge microplasma atomic emission spectrometer coupled with a tungsten coil (W-coil) for on-line hydride generation trapping-electrothermal vaporization. Total sample throughput can be greatly improved through the adoption of a horizontally fixed W-coil and the flow injection mode. In addition, the horizontally fixed W-coil and an inserted quartz capillary for on-line trapping contributed to stable and good signal even at a high gas flow rate when volatile cadmium species were trapped, and less sample-consuming and time-saving can be realized in this work. Compared to direct injection, the sensitivity and the LOD were improved by 29- and 38-fold, respectively. The proposed method provides a promising approach to develop a miniaturized instrumentation for highly sensitive detection of trace elements.
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Affiliation(s)
- Yujia Deng
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Kai Li
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiandeng Hou
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China; Key Lab of Green Chemistry & Technology of MOE, and College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiaoming Jiang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China.
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32
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Qian J, Ma L, Yan W, Zhuang H, Huang M, Zhang J, Wang J. Inactivation kinetics and cell envelope damages of foodborne pathogens Listeria monocytogenes and Salmonella Enteritidis treated with cold plasma. Food Microbiol 2021; 101:103891. [PMID: 34579851 DOI: 10.1016/j.fm.2021.103891] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/21/2021] [Accepted: 08/23/2021] [Indexed: 11/19/2022]
Abstract
In recent years, more attention has been paid to the application of cold plasma (CP) in eliminating foodborne pathogenic bacteria. This work investigated CP effects on inactivation kinetics and cell envelopes of Listeria monocytogenes (L. monocytogenes) and Salmonella Enteritidis (S. Enteritidis). Bacterial suspensions were treated with dielectric barrier discharge atmospheric CP at 75 kV for different treatment time. Three regression models were tested for estimating inactivation kinetics. Reactive species generated in plasma, the appearance and integrity of bacterial cells, the activity and secondary structure of enzymes in the cell envelope, and molecular docking, were measured for evaluating the envelope damages. Results indicated that Log-linear model was suitable for L. monocytogenes and the Weibull model was suitable for S. Enteritidis. S. Enteritidis was more sensitive to short-lived reactive species (such as OH radicals) in plasma than L. monocytogenes, and the cell envelope of S. Enteritidis was more severely damaged (the increased membrane permeability and leakage of intracellular substances) after plasma treatment. Interestingly, compared with S. Enteritidis, the decrease in the activity of enzymes existing in the cell envelope of L. monocytogenes did not contribute significantly to the death of bacteria. Molecular docking further suggested that the decrease in the enzyme activity might be due to the modification of the enzyme, by the interaction between reactive species in plasma (H2O2) and amino acid residues of the enzyme through the hydrogen bond.
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Affiliation(s)
- Jing Qian
- National Center of Meat Quality & Safety Control, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Liangjun Ma
- National Center of Meat Quality & Safety Control, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wenjing Yan
- National Center of Meat Quality & Safety Control, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hong Zhuang
- Quality and Safety Assessment Research Unit, U.S. National Poultry Research Center, USDA-ARS, 950 College Station Road, Athens, GA, 30605, United States
| | - Mingming Huang
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Jianhao Zhang
- National Center of Meat Quality & Safety Control, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jiamei Wang
- College of Food Science and Technology, Hainan University, Haikou, 570228, China.
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33
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Xiong H, Zhu X, Lu S, Zhou C, Xu W, Zhou Z. Enhancement of plasma-catalytic oxidation of ethylene oxide (EO) over FeMn catalysts in a dielectric barrier discharge reactor. Sci Total Environ 2021; 788:147675. [PMID: 34034179 DOI: 10.1016/j.scitotenv.2021.147675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/04/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
In this work, an integrated system combining non-thermal plasma (NTP) and FeMn catalysts was developed for ethylene oxide (EO) oxidation. The effect of Fe/Mn molar ratio on the oxidation rate of EO and energy yield of the plasma-catalytic process has been investigated as a function of specific energy density (SED). Compared with the case of using plasma alone, the combination of plasma and FeMn catalysts greatly enhanced the reaction performance by the factor of 25.2% to 97.6%. The maximum oxidation rate of 98.8% was achieved when Fe1Mn1 catalyst was placed in the dielectric barrier discharge (DBD) reactor at the SED of 656.1 J·L-1. The highest energy yield of 2.82 g·kWh-1 was obtained at the SED of 323.2 J·L-1 over the Fe1Mn1 catalyst. The interactions between Fe and Mn species resulted in larger specific surface area of the catalyst. Moreover, the reducibility of the catalysts was improved, while more surface adsorbed oxygen (Oads) was detected on the catalyst surfaces. Moreover, the redox cycles between Fe and Mn species facilitated consumption and supplementation of reactive oxygen species, which contributed to the plasma-catalytic oxidation reactions. The major reaction products of plasma-induced EO oxidation over the FeMn catalysts, including CH3COOH, CH3CHO, CH4, C2H6 and C2H4, were observed using the FT-IR analyzer and GC-MS instrument. The reaction mechanisms of EO oxidation were discussed in terms of both gas-phase reaction and catalyst surface reaction. The redox cycles between Fe and Mn species facilitated the plasma reaction and accelerated the deep oxidation of by-products.
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Affiliation(s)
- Haiping Xiong
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Xinbo Zhu
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China.
| | - Shangmin Lu
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Chunlin Zhou
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Weiping Xu
- Ningbo Ruiling Advanced Energy Materials Institute Co., Ltd, Ningbo 315500, China
| | - Zijian Zhou
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, Hubei Province, China.
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34
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Li K, Chen H, Chen Z, He L, Hou X, Jiang X. Miniaturized TOC analyzer using dielectric barrier discharge for catalytic oxidation vapor generation and point discharge optical emission spectrometry. Anal Chim Acta 2021; 1172:338683. [PMID: 34119015 DOI: 10.1016/j.aca.2021.338683] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022]
Abstract
Total organic carbon (TOC) is an important parameter describing organic pollution degree of waters. Due to the increasing need of field analysis and drawbacks of conventional TOC analytical instruments, miniaturized TOC analyzers are still demanding. In this work, a dielectric barrier discharge (DBD) microplasma was utilized for catalytic oxidation vapor generation (COVG) of organic compounds into CO2, and a point discharge (PD) microplasma was employed to excite the carbon atomic emission spectra for quantification. Sample solution with phosphoric acid and persulfate solution was injected into the DBD-COVG reactor by a syringe to convert organic compounds into CO2 efficiently and quickly, which was subsequently transported into the point discharge optical emission spectrometer (PD-OES) for detecting carbon at 193.09 nm. Under optimal experimental conditions, high oxidation efficiencies for several organic compounds were achieved, i.e., 96.4%, 95.1% and 94.3% for 50 mg L-1 potassium hydrogen phthalate (KHP), sodium laurylsulfonate and phenol, respectively. A limit of detection (LOD) of 0.02 mg L-1 (as C) was obtained, with a precision of 3.9% (relative standard deviation, RSD) at 15 mg L-1 TOC standard (as C). The possible catalytic oxidation mechanism was proposed with the characteristic results of electron paramagnetic resonance (EPR). Its potential environmental application was demonstrated by successfully analyzing TOC in underground water, surface river water and surface sedimentary water samples from oil fields, with analytical results agreed well with those obtained by the commercial high-temperature combustion coupled nondispersive infrared absorption (HTC-NDIR) technique.
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Affiliation(s)
- Kai Li
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Hanjiao Chen
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Zhiming Chen
- Changqing Oilfield Branch Company Oil Production Plant NO.11, PetroChina Company Limited, Qingyang, Gansu, 745000, China
| | - Lin He
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiandeng Hou
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China; Key Laboratory of Green Chemistry & Technology of MOE, and College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China.
| | - Xiaoming Jiang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China.
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35
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Hatzisymeon M, Tataraki D, Rassias G, Aggelopoulos CA. Novel combination of high voltage nanopulses and in-soil generated plasma micro-discharges applied for the highly efficient degradation of trifluralin. J Hazard Mater 2021; 415:125646. [PMID: 33744753 DOI: 10.1016/j.jhazmat.2021.125646] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
Cold plasma is considered a highly competitive advanced oxidation process for the removal of organic pollutants from soil. Herein, we describe for the first time the combination of in-soil generated plasma micro-discharges with the advantageous high voltage nanosecond pulses (NSP) towards the high-efficient degradation of trifluralin in soil. We performed a detailed parametric analysis (pulse frequency, pulse voltage, soil thickness, soil type, energy efficiency) to determine the optimum operational conditions. High trifluralin degradation was achieved even at the higher soil thickness, indicating that the production of plasma discharges directly inside the soil pores enhanced the mass transfer of plasma reactive oxygen and nitrogen species (RONS) in soil. The energy efficiency achieved was outstanding, being up to 2-3 orders of magnitude higher than those reported for other plasma systems. We identified the intermediate degradants and proposed the most dominant degradation pathways whereas a thorough exhaust gases analysis, optical emission spectroscopy (OES) and active species inhibition by using trapping agents revealed the main RONS involved. This effort constitutes a significant advancement in the "green" credentials and application of plasma-induced degradation of pollutants as it describes for the first time the removal of the highly harmful and toxic pesticide trifluralin from soil and provides a novel perspective towards the future development of cold plasma-based soil remediation technologies.
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Affiliation(s)
- M Hatzisymeon
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504 Patras, Greece; Chemistry Department, University of Patras, 26504 Patras, Greece
| | - D Tataraki
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504 Patras, Greece; Chemistry Department, University of Patras, 26504 Patras, Greece
| | - G Rassias
- Chemistry Department, University of Patras, 26504 Patras, Greece
| | - C A Aggelopoulos
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504 Patras, Greece.
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36
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Chang KL, Lin YC, Qiu MZ, Tu CW, Chang CP, Wu JL, Lin YC, Chang CK. Gas-phase isopropanol degradation by nonthermal plasma combined with Mn-Cu/-Al 2O 3. Environ Sci Pollut Res Int 2021; 28:40693-40702. [PMID: 33245541 DOI: 10.1007/s11356-020-10721-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
In this study, the dielectric barrier discharge (DBD) induced by nonthermal plasma (NTP) technology was used for isopropanol (IPA) degradation. IPA, intermediate, final product, and ozone concentrations were analyzed using GC-MS, carbon dioxide detector, and ozone detector. The experimental flow rate and concentration were fixed to 1 L/min and 1200 ppm ± 10%, respectively. Different reaction procedures were proposed for self-made metal catalyst combined with a plasma system (plasma alone and γ-Al2O3 combined with plasma, Cu (5 wt%)/γ-Al2O3 combined with plasma, Mn (3 wt%)-Cu (5 wt%)/γ-Al2O3 combined with plasma). In addition, the effect of the carrier gas oxygen content (0%, 20%, and 100%) on IPA conversion and intermediate and carbon dioxide selectivity was also investigated. The results revealed that the Mn (F)-Cu/γ-Al2O3 combined with plasma exhibited more efficient IPA conversion. In the 100% oxygen environment, the IPA conversion rate increased from 79.32 to 99.99%, and carbon dioxide selectivity increased from 3.82 to 50.23%. IPA was completely converted after 60 min of plasma treatment with the acetone selectivity, carbon dioxide selectivity, and tail ozone concentration of 26.71% ± 1.27%, 50.23% ± 0.56%, and 1761 ± 11 ppm, respectively. This study proved that the current single planar DBD configuration is an effective advanced treatment technology for the decomposition of VOCs.
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Affiliation(s)
- Ken-Lin Chang
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Chieh Lin
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Ming-Ze Qiu
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chun-Wei Tu
- Environmental Resource and Management Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Chih-Ping Chang
- Environmental Resource and Management Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Jhong-Lin Wu
- Environmental Resource and Management Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Yung-Chang Lin
- Department of Electrical Engineering, Cheng Shiu University, Kaohsiung, Taiwan
- Department of Electrical Engineering, Cheng Shiu University, Kaohsiung, Taiwan
- Center for environmental Toxin and Emerging Contaminant Research, Cheng Shiu University, Kaohsiung, Taiwan
| | - Chien-Kuei Chang
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.
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37
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Kang MS, Yu G, Shin J, Hwang J. Collection and decomposition of oil mist via corona discharge and surface dielectric barrier discharge. J Hazard Mater 2021; 411:125038. [PMID: 33453671 DOI: 10.1016/j.jhazmat.2021.125038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/16/2020] [Accepted: 01/01/2021] [Indexed: 06/12/2023]
Abstract
Oil mist emitted during cooking is one of the major sources of atmospheric particulate matter in urban areas. A conventional electrostatic precipitator (ESP) is used in some large restaurants; it requires regular electrode cleaning to maintain particle collection performance. However, oil mist generated during cooking is viscous and difficult to clean with water. Herein, we introduce a methodology and a device for cleaning collected oil mist using surface dielectric barrier discharge (surface-DBD) plasma. Our device uses corona discharge for the collection of oil mist. Subsequently, the oil mist collected is decomposed to gas-phase species by surface-DBD plasma. A maximum collection efficiency of 93.25% (for 230 nm di-ethyl hexyl sebacate (DEHS) particle) is obtained at a flow velocity of 1.5 m/s. The maximum oil mist decomposition efficiency is 96.4%. More than 80% of the decomposed oil mist is converted to CO2 and CO under all test conditions. Some of the byproducts other than CO and CO2 are released as particles. Higher frequency results in higher oil mist decomposition efficiency, but also higher byproduct formation of particles. The mechanism of oil mist decomposition by surface-DBD plasma is discussed using optical emission spectroscopy data.
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Affiliation(s)
- Myung Soo Kang
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea.
| | - Gihyeon Yu
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea.
| | - Jaeuk Shin
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea.
| | - Jungho Hwang
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea.
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38
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Jiang B, Xu K, Li J, Lu H, Fei X, Yao X, Yao S, Wu Z. Effect of supports on plasma catalytic decomposition of toluene using in situ plasma DRIFTS. J Hazard Mater 2021; 405:124203. [PMID: 33268207 DOI: 10.1016/j.jhazmat.2020.124203] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/04/2020] [Accepted: 10/05/2020] [Indexed: 06/12/2023]
Abstract
Plasma catalysis technology has been demonstrated to be effective for the decomposition of volatile organic compounds (VOCs). It is highly desired to explore the effect of supports on VOCs oxidation processes during plasma catalysis. In this work, four supports of SiO2, ZSM-5-300, ZSM-5-38 and γ-Al2O3 loading with transition metal oxides were used to decompose toluene at room temperature. It was found that toluene decomposition with 1 wt%Mn/γ-Al2O3 was highest, which was strongly proportional to the ozone decomposition ability of the catalyst. The plasma catalytic decomposition of toluene over 1 wt% MnO2 on different supports were characterized using in situ plasma diffuse reflectance infrared Fourier transform spectrometer. The results showed that 1 wt%Mn/γ-Al2O3 could further catalyze toluene to carbonate and bicarbonate via the breakage of C-C bonds from benzoic acid, while that was difficult for 1 wt% Mn/SiO2, 1 wt%Mn/ZSM-5-300 and 1 wt%Mn/ZSM-5-38. The reaction mechanism of toluene decomposition on different catalysts were proposed.
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Affiliation(s)
- Boqiong Jiang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang 310018, China
| | - Kai Xu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang 310018, China
| | - Jing Li
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu 213164, China.
| | - Hao Lu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang 310018, China
| | - Xiaodan Fei
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang 310018, China
| | - Xinlei Yao
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang 310018, China
| | - Shuiliang Yao
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu 213164, China.
| | - Zuliang Wu
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu 213164, China.
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39
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Boekema B, Stoop M, Vlig M, van Liempt J, Sobota A, Ulrich M, Middelkoop E. Antibacterial and safety tests of a flexible cold atmospheric plasma device for the stimulation of wound healing. Appl Microbiol Biotechnol 2021; 105:2057-2070. [PMID: 33587156 PMCID: PMC7906937 DOI: 10.1007/s00253-021-11166-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 01/25/2021] [Accepted: 02/03/2021] [Indexed: 12/14/2022]
Abstract
Cold atmospheric plasma (CAP) devices generate an ionized gas with highly reactive species and electric fields at ambient air pressure and temperature. A flexible dielectric barrier discharge (DBD) was developed as an alternative antimicrobial treatment for chronic wounds. Treatment of Staphylococcus aureus in collagen-elastin matrices with CAP for 2 min resulted in a 4 log reduction. CAP treatment was less effective on S. aureus on dermal samples. CAP did not affect cellular activity or DNA integrity of human dermal samples when used for up to 2 min. Repeated daily CAP treatments for 2 min lowered cellular activity of dermal samples to 80% after 2 to 4 days, but this was not significant. Repeated treatment of ex vivo human burn wound models with CAP for 2 min did not affect re-epithelialization. Intact skin of 25 healthy volunteers was treated with CAP for 3× 20" to determine safety. Although participants reported moderate pain scores (numerical rating scale 3.3), all volunteers considered the procedure to be acceptable. Severe adverse events did not occur. CAP treatment resulted in a temporarily increased local skin temperature (≈3.4°C) and increased erythema. Lowering the plasma power resulted in a significantly lower erythema increase. Good log reduction (2.9) of bacterial load was reached in 14/15 volunteers artificially contaminated with Pseudomonas aeruginosa. This study demonstrated the in vitro and in vivo safety and efficacy in bacterial reduction of a flexible cold plasma device. Trial registration number NCT03007264, January 2, 2017 KEY POINTS: • CAP strongly reduced bacterial numbers both in vitro and in vivo. • Re-epithelialization of burn wound models was not affected by repeated CAP. • CAP treatment of intact skin was well tolerated in volunteers.
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Affiliation(s)
- Bouke Boekema
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.
| | - Matthea Stoop
- Burn Center, Red Cross Hospital, Beverwijk, The Netherlands
| | - Marcel Vlig
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands
| | - Jos van Liempt
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Ana Sobota
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Magda Ulrich
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.,Department of Plastic, Reconstructive and Hand Surgery, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands.,Department of Pathology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Esther Middelkoop
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.,Burn Center, Red Cross Hospital, Beverwijk, The Netherlands.,Department of Plastic, Reconstructive and Hand Surgery, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
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Sakudo A, Yagyu Y. Application of a roller conveyor type plasma disinfection device with fungus-contaminated citrus fruits. AMB Express 2021; 11:16. [PMID: 33423150 PMCID: PMC7797019 DOI: 10.1186/s13568-020-01177-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/30/2020] [Indexed: 12/13/2022] Open
Abstract
Efficient methods to achieve the safe decontamination of agricultural products are needed. Here, we investigated the decontamination of citrus fruits to test the antifungal potential of a novel non-thermal gas plasma apparatus, termed a roller conveyer plasma instrument. This instrument generates an atmospheric pressure dielectric barrier discharge (APDBP) plasma on a set of rollers. Penicillium venetum was spotted onto the surface of the fruit or pericarps, as well as an aluminium plate to act as a control, before performing the plasma treatment. The results showed that viable cell number of P. venetum decreased with a decimal reduction time (D value or estimated treatment time required to reduce viable cell number by 90%) of 0.967 min on the aluminium plate, 2.90 min and 1.88 min on the pericarps of ‘Kiyomi’ (Citrus unshiu × C. sinensis) and ‘Kawano-natsudaidai’ (C. natsudaidai) respectively, and 2.42 min on the surface of ‘Unshu-mikan’ (C. unshiu). These findings confirmed a fungicidal effect of the plasma not only on an abiotic surface (aluminium plate) but also on a biotic surface (citrus fruit). Further development of the instrument by combining sorting systems with the plasma device promises an efficient means of disinfecting citrus fruits during food processing.
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Wang C, Zhu L, Zhao F, Xu D. The chemistry of gaseous benzene degradation using non-thermal plasma. Environ Sci Pollut Res Int 2021; 28:1565-1573. [PMID: 32851524 DOI: 10.1007/s11356-020-10506-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 08/12/2020] [Indexed: 06/11/2023]
Abstract
In this study, the abatement of benzene in a dielectric barrier discharge (DBD) reactor was studied. The efficiency was investigated in terms of benzene conversion and product formation. The composition of gas-liquid-solid three-phase product produced during degradation was observed by GC-MS. Under the optimal SED, the solid-phase product was analyzed by FT-IR, SEM, and EDS. The results suggested that the product were mainly benzonitriles, benzenedicarbonitrile, phenols, esters, and amides. The wt% of C in product decreased as SED increased, demonstrating that the high discharge voltage facilitated the conversion of VOCs to gaseous intermediate product and CO2. Possible degradation mechanism and pathways of benzene destruction in the DBD reactor were proposed.
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Affiliation(s)
- Chunyu Wang
- Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Ling Zhu
- Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China.
| | - Fei Zhao
- Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China
| | - Danyun Xu
- Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China
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Ojah N, Borah R, Ahmed GA, Mandal M, Choudhury AJ. Surface modification of electrospun silk/AMOX/PVA nanofibers by dielectric barrier discharge plasma: physiochemical properties, drug delivery and in-vitro biocompatibility. Prog Biomater 2020; 9:219-237. [PMID: 33206319 PMCID: PMC7718379 DOI: 10.1007/s40204-020-00144-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 10/27/2020] [Indexed: 12/22/2022] Open
Abstract
The naturally obtained protein Bombyxmori silk is a biocompatible polymer with excellent mechanical properties and have the potential in controlled drug delivery applications. In this work, we have demonstrated dielectric barrier discharge (DBD) oxygen (O2) plasma surface modified electrospun Bombyxmori silk/Amoxicillin hydrochloride trihydrate (AMOX)/polyvinyl alcohol (PVA) nanofibers for drug release applications with controlled plasma treatment duration (1-10 min). The findings indicate that plasma treated electrospun nanofibers for 1-3 min exhibited significant enhancement in tensile strength, Young's modulus, wettability and surface energy. The plasma treated electrospun nanofibers for 1-5 min showed remarkable increase in AMOX released rate, whereas the electrospun nanofibers treated with plasma irradiation beyond 5 min showed only marginal increase. Moreover, the plasma treated nanofibers also exhibited good antibacterial activity against both E. coli (gram negative) and S. aureus (gram positive) bacteria. The untreated and the plasma treated silk/AMOX/PVA electrospun nanofibers for 1-3 min showed enhanced viability of primary adipose derived mesenchymal stem cells (ADMSCs) growth on them and much less hemolysis activity (< 5%). The in vitro biocompatibility of various electrospun nanofibers were further corroborated by live/dead imaging and cytoskeletal architecture assessment demonstrating enhanced cell adhesion and spreading on the plasma treated nanofibers for 1-3 min. The findings of the present study suggest that the silk/AMOX/PVA electrospun nanofibers with plasma treatment (1-3 min) due to their enhanced drug release ability and biocompatibility can be used as potential wound dressing applications.
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Affiliation(s)
- Namita Ojah
- Laboratory for Plasma Processing of Materials, Department of Physics, Tezpur University, Tezpur, Assam, 784028, India
| | - Rajiv Borah
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, 781035, India
| | - Gazi Ameen Ahmed
- Laboratory for Plasma Processing of Materials, Department of Physics, Tezpur University, Tezpur, Assam, 784028, India
| | - Manabendra Mandal
- Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, Assam, 784028, India
| | - Arup Jyoti Choudhury
- Laboratory for Plasma Processing of Materials, Department of Physics, Tezpur University, Tezpur, Assam, 784028, India.
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Ott LC, Appleton HJ, Shi H, Keener K, Mellata M. High voltage atmospheric cold plasma treatment inactivates Aspergillus flavus spores and deoxynivalenol toxin. Food Microbiol 2020; 95:103669. [PMID: 33397632 DOI: 10.1016/j.fm.2020.103669] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 10/23/2022]
Abstract
Fungal contamination is a concern for the food industry. Fungal spores resist food sterilization treatments and produce mycotoxins that are toxic for animals and humans. Technologies that deactivate spores and toxins without impacting food quality are desirable. This study demonstrates the efficiency of a high voltage atmospheric cold plasma (HVACP) technology using air to generate reactive oxygen (ROS) and nitrogen (RNS) species for the degradation of Aspergillus flavus cultures and the deoxynivalenol (DON) mycotoxin. Optical emission and absorption spectroscopy demonstrate ionization of hydroxyl groups, atomic oxygen and nitrogen, and confirm production of ROS and RNS, e.g. O3, NO2, NO3, N2O4, and N2O5. Fungal cultures show a depletion in pigmentation and an ~50% spore inactivation after 1-min treatments. Treated spores show surface ablation and membrane degradation by scanning electron microscopy. Twenty-minute direct HVACP treatments of 100 μg of DON in one mL aqueous suspensions resulted in a greater than 99% reduction in DON structure and rescued over 80% of Caco-2 cell viability; however, the same treatment on 100 μg of powdered DON toxin only showed a 33% reduction in DON and only rescued 15% of cell viability. In summary, HVACP air treatment can inactivate both fungal spores and toxins in minutes.
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Affiliation(s)
- Logan C Ott
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA; Interdepartmental Microbiology Graduate Program, Iowa State University, Ames, IA, USA
| | - Holly J Appleton
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA
| | - Hu Shi
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA
| | - Kevin Keener
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA
| | - Melha Mellata
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA; Interdepartmental Microbiology Graduate Program, Iowa State University, Ames, IA, USA.
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Liu M, Liu J, Mao X, Na X, Chen G, Ding L, Qian Y. In situ preconcentration of lead by dielectric barrier discharge and its application to high sensitivity surface water analysis. Talanta 2020; 219:121182. [PMID: 32887100 DOI: 10.1016/j.talanta.2020.121182] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 05/09/2020] [Accepted: 05/14/2020] [Indexed: 11/23/2022]
Abstract
A novel dielectric barrier discharge (DBD) reactor was utilized to in situ enrich and atomize lead in gas phase. The structure of DBD reactor was optimized to broaden the acidity window of plumbane generation from 1% to 3.5%, bringing better analytical stability and practicability deriving from hydride generation process. For the first time DBD proved effective in lead preconcentration and broadening the acidity window of plumbane generation. Pb can be trapped quantitatively (~100%) on the quartz surface of DBD tube under O2-containing atmosphere and released (~100%) under H2-containing atmosphere. The absolute detection limit (LOD) for Pb was 4.1 pg (injection volume = 1.2 mL), and the linear (R2 > 0.999) range was 0.05-100 μg/L. The results were in good agreement with those of certified reference materials (CRMs), and spiked recoveries for surface water samples were 99-104% with 2-8% RSD. By gas phase analyte enrichment, the proposed method reduced absolute LOD by 10 times. It was deduced that plumbane was changed to lead oxide species trapped on the quartz tube surface and then released, and transported in form of atoms to the detection zone.
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Panda NR, Sahu D. Enhanced hydrogen generation efficiency of methanol using dielectric barrier discharge plasma methodology and conducting sea water as an electrode. Heliyon 2020; 6:e04717. [PMID: 32995589 DOI: 10.1016/j.heliyon.2020.e04717] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 08/30/2019] [Accepted: 08/11/2020] [Indexed: 11/21/2022] Open
Abstract
In this work, methanol decomposition method has been discussed for the production of hydrogen gas with the application of plasma. A simple dielectric barrier discharge (DBD) plasma reactor was designed for this purpose with two types of electrode. The DBD plasma reactor was experimented by substituting one of the metal electrodes with feebly conducting sea water which yielded better efficiency in producing hydrogen gas. Experimental parameters such as; discharge voltage and time were varied by maintaining a discharge gap of 1.5 mm and the plasma discharge characteristics were studied. Filamentary type micro-discharges were found to be formed which was observed as numerous streamer clusters in the current waveform. Gas chromatographic study confirmed the production of hydrogen gas with residence time around 3.6 min. Although, the concentration (%) of H2 was high (98.1 %) and consistent with copper electrode assembly, the rate of formation and concentration was found to be the highest (98.7 %) for water electrode for specific discharge voltage. The energy efficiency was found to be 0.5 mol H2/kWh and 1.2 mol H2/kWh for metal (Cu) and water electrodes respectively. The electrode material significantly affects the plasma condition and hence the rate of hydrogen production. Compositional analysis of the water used as electrode showed a minimal change in the composition even after the completion of the experiment as compared to the untreated water. Methanol degradation study shows the presence of untreated methanol in the residue of the plasma reactor which has been confirmed from the absorption spectra.
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Drees C, Schütz A, Niu G, Franzke J, Vautz W, Brandt S. Stepwise optimization of a Flexible Microtube Plasma (FµTP) as an ionization source for Ion Mobility Spectrometry. Anal Chim Acta 2020; 1127:89-97. [PMID: 32800141 DOI: 10.1016/j.aca.2020.06.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 11/24/2022]
Abstract
The ionization source is the central system of analytical devices such as mass spectrometers or ion mobility spectrometers. In this study, a recently developed flexible microtube plasma (FμTP) is applied as an ionization source for a custom-made drift tube ion mobility spectrometer (IMS) for the first time. The FµTP is based on a highly miniaturized, robust and a small-footprint dielectric barrier discharge design with an outstanding ionization efficiency. In this study, the experimental setup of the FµTP was further improved upon to achieve optimal coupling conditions in terms of the ion mobility spectrometry sensitivity and the plasma gas consumption. One major focus of this study was the adjustment of the electrical operation parameters, in particular, the high voltage amplitude, frequency and duty cycle, in order to minimize the electric field disturbances and yield higher signals. Additionally, the consumption of helium plasma gas was reduced by refining the FµTP. It was found that the ionization efficiency could be significantly enhanced by increasing the plasma high voltage and through application of a duty cycle up to 90:10. Plasma gas flows could be reduced down to 3 mL min-1 by increasing the plasma high voltage amplitude. Furthermore, a smaller wire electrode design enables the operation of the FµTP with nitrogen and clean air. Moreover, detection limits of a homologous series of ketones in the range of 330 pptv (N2-FµTP, 2-decanone) down to 20 pptv (He-FµTP, 2-octanone) could be reached in the optimized setup. To sum up, this feasibility study demonstrates the potential of the optimized FµTP as a powerful ionization source for ion mobility spectrometry especially with regard to ionization efficiency.
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Affiliation(s)
- Carolin Drees
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany
| | - Alexander Schütz
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany
| | - Guanghui Niu
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany
| | - Joachim Franzke
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany
| | - Wolfgang Vautz
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany; ION-GAS GmbH, Konrad-Adenauer-Allee 11, 44263, Dortmund, Germany
| | - Sebastian Brandt
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany.
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Ansari M, Sharifian M, Ehrampoush MH, Mahvi AH, Salmani MH, Fallahzadeh H. Dielectric barrier discharge plasma with photocatalysts as a hybrid emerging technology for degradation of synthetic organic compounds in aqueous environments: A critical review. Chemosphere 2021; 263:128065. [PMID: 33297070 DOI: 10.1016/j.chemosphere.2020.128065] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/15/2020] [Accepted: 08/18/2020] [Indexed: 12/07/2022]
Abstract
Dielectric barrier discharge (DBD) plasma has been recently used for removal of synthetic organic compounds (SOCs) from aqueous environments. The removal of SOCs by alone DBD is significantly limited by its high electricity needs and inefficient mineralization, which affects the further application of DBD for SOCs. The combined application of DBD with other technologies and the addition of a supplementary substance for energy-saving were proposed to resolve these problems. The addition of catalysts is considered to be a promising and innovative approach to increase the energy yield of DBD, improve the environment friendly of DBD, develop the variety of goal SOCs, and improve the removal efficiency of DBD system. Despite the increasing use of the coupling form of DBD and catalysts, as catalytic dielectric barrier discharge (CDBD), but it still requires a comprehensive review to summarize the last studies and highlight the future perspectives in this area. Therefore, this work is the first literature review aimed to critically assess the latest developments of catalysts coupling with DBD employed in aqueous environments. Moreover, performance evaluation, energy yield, toxicity, eco-friendly, and future perspectives of the CDBD systems for SOCs removal were discussed and overviewed. The results showed that the coupling of catalysts with DBD presents synergistic effects and had excellent removal performance for aqueous SOCs. Overall, it can be concluded that the essential principles of environmental and economic sustainability have been addressed for the removal of persistent pollutants from aqueous environments in the CDBD systems.
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Dijksteel GS, Ulrich MMW, Vlig M, Sobota A, Middelkoop E, Boekema BKHL. Safety and bactericidal efficacy of cold atmospheric plasma generated by a flexible surface Dielectric Barrier Discharge device against Pseudomonas aeruginosa in vitro and in vivo. Ann Clin Microbiol Antimicrob 2020; 19:37. [PMID: 32814573 PMCID: PMC7439657 DOI: 10.1186/s12941-020-00381-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 08/13/2020] [Indexed: 02/07/2023] Open
Abstract
Background Cold atmospheric plasma (CAP), which is ionized gas produced at atmospheric pressure, could be a novel and potent antimicrobial therapy for the treatment of infected wounds. Previously we have shown that CAP generated with a flexible surface Dielectric Barrier Discharge (sDBD) is highly effective against bacteria in vitro and in ex vivo burn wound models. In the current paper, we determined the in vitro and in vivo safety and efficacy of CAP generated by this sDBD device. Methods The effect of CAP on DNA mutations of V79 fibroblasts was measured using a hypoxanthine–guanine-phosphoribosyltransferase (HPRT) assay. Furthermore, effects on cell proliferation, apoptosis and DNA damage in ex vivo burn wound models (BWMs) were assessed using immunohistochemistry. Next, 105 colony forming units (CFU) P. aeruginosa strain PAO1 were exposed to CAP in a 3D collagen-elastin matrix environment to determine the number of surviving bacteria in vitro. Finally, rat excision wounds were inoculated with 107 CFU PAO1 for 24 h. The wounds received a single CAP treatment, repeated treatments on 4 consecutive days with CAP, 100 µL of 1% (wt/wt) silver sulfadiazine or no treatment. Wound swabs and punch biopsies were taken to determine the number of surviving bacteria. Results Exposure of V79 fibroblasts to CAP did not increase the numbers of mutated colonies. Additionally, the number of proliferative, apoptotic and DNA damaged cells in the BWMs was comparable to that of the unexposed control. Exposure of PAO1 to CAP for 2 min resulted in the complete elimination of bacteria in vitro. Contrarily, CAP treatment for 6 min of rat wounds colonized with PAO1 did not effectively reduce the in vivo bacterial count. Conclusions CAP treatment was safe but showed limited efficacy against PAO1 in our rat wound infection model.
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Affiliation(s)
- Gabrielle S Dijksteel
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands. .,Dept. of Plastic, Reconstructive & Hand Surgery, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands.
| | - Magda M W Ulrich
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.,Dept. of Plastic, Reconstructive & Hand Surgery, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands.,Dept. of Pathology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Marcel Vlig
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands
| | - Ana Sobota
- Dept. of Applied Physics, Eindhoven University of Technology, PO Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Esther Middelkoop
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands.,Dept. of Plastic, Reconstructive & Hand Surgery, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Bouke K H L Boekema
- Association of Dutch Burn Centres, Zeestraat 29, 1941 AJ, Beverwijk, The Netherlands
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Liu X, Yu K, Zhang H, Zhang X, Zhang H, Zhang J, Gao J, Li N, Jiang J. A portable electromagnetic heating-microplasma atomic emission spectrometry for direct determination of heavy metals in soil. Talanta 2020; 219:121348. [PMID: 32887076 DOI: 10.1016/j.talanta.2020.121348] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 06/23/2020] [Accepted: 06/28/2020] [Indexed: 01/10/2023]
Abstract
In this work, electromagnetic heating was firstly explored as sample introduction approach in portable microplasma-atomic emission spectrometer to achieve the direct, rapid analysis of soil sample. The device primarily consists of an electromagnetic heating unit, a dielectric barrier discharge (DBD) excitation source and an optical signal acquisition unit. A W-boat was used as an electromagnetic heating medium and sample carrier, and copper coil spiraled around the tube was used as magnetic induction coil. With applying a voltage on copper coil, W-boat was electromagnetically heated to vaporize analyte-containing species for sample introduction into the microplasma. The portable battery-powered device is controlled by a miniature touch screen computer with the main advantages of small size (40.5 cm (l) × 30 cm (w) × 15 cm (h).), light weight (less than 7 kg), low-power consumption (the average power consumption is 118 W). By this method, Hg, Cd and Pb in soil were simultaneously analyzed within 4 min. Under the optimal conditions, the limits of detection for Hg, Cd and Pb in soils were 8.0 μg/kg, 17.8 μg/kg and 3.5 mg/kg, respectively, meeting the requirements for environmental quality standards for soils of China. Different types of CRM soils were analyzed, demonstrating good accuracy, stability and utility of this method. This technique could be a promising and powerful tool for on-site, rapid analysis of heavy metals in soil even other solid samples. Electromagnetic heating mode provides a good alternative for solid sampling to develop portable, miniaturized atomic spectrometers for solid sample analysis.
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Affiliation(s)
- Xiangyu Liu
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China
| | - Kai Yu
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China
| | - Hong Zhang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China
| | - Xiangnan Zhang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150090, PR China
| | - Hengnan Zhang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China
| | - Jing Zhang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China
| | - Jing Gao
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China
| | - Na Li
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, 510006, PR China.
| | - Jie Jiang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang, 150090, PR China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong, 264209, PR China.
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50
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Jiang N, Zhao Y, Shang K, Lu N, Li J, Wu Y. Degradation of toluene by pulse-modulated multistage DBD plasma: Key parameters optimization through response surface methodology (RSM) and degradation pathway analysis. J Hazard Mater 2020; 393:122365. [PMID: 32120211 DOI: 10.1016/j.jhazmat.2020.122365] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 01/17/2020] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
In the present work, a pulse-modulated high-frequency (HF) dielectric barrier discharge (DBD) plasma has been employed and utilized to evaluate the feasibility of toluene degradation in a multistage rod-type reactor at room temperature. Experimental result indicates that the energy consumption is significantly reduced and heating effect can be effectively suppressed when the DBD plasma is ignited in pulse-modulated mode instead of continuous mode. The response surface methodology (RSM) based on central composite design (CCD) model has been proposed to evaluate the contribution of key operating parameters including duty cycle and modulation frequency. The proposed model offers a good fit for actal data. The contribution of the modulation frequency is observed to be more dominant compared to the duty cycle for both the degradation efficiency and the energy yield. According to the results provided by the proposed model, the toluene degradation efficiency of 62.9 % and the energy yield of 0.90 g/kWh are obtained under the optimal conditions of 400 Hz modulation frequency and 56 % duty cycle. The effect of initial toluene concentration and gas flow rate have also been investigated. Increasing toluene initial concentration and gas flow rate are found to be unfavorable for the degradation of toluene, however, which are of benefit to the energy yield. A long-time experiment to assess the stability of pulse-modulated DBD has been successful performed. The possible pathways in plasma degradation of toluene is proposed based on the intermediates identification using GC-MS and FTIR.
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Affiliation(s)
- Nan Jiang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China; State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - Yonghe Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China; School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China
| | - Kefeng Shang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Na Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Jie Li
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Yan Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian, 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China
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