Article
Engineering, Environmental
Jingyu Ren, Jie Li, Lei Lv, Jian Wang
Summary: Ce-doped CoOOH was used as a catalyst in DBD plasma for degrading caffeic acid, showing significant influence of Ce doping amounts on catalytic performance and reaching maximum efficiency at a molar ratio of 1:9. The catalytic effect was mainly attributed to the transformation of O-3 and H2O2 to reactive species like .OH, with experiments and simulations showing increased oxygen vacancies and Lewis acid sites in CoOOH after Ce doping.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Chenbin Lin, Zonghao Liu, Yan Zhao, Chengye Song, Fanyue Meng, Bing Song, Gancheng Zuo, Qi Qi, Yuqiao Wang, Lei Yu, Min Song
Summary: In this study, dielectric barrier discharge (DBD) plasma was used to enhance the degradation of 2,4-dichlorophenol (2,4-DCP) in water. It was found that O2 atmosphere was the most efficient working condition for complete degradation of 2,4-DCP in 40 minutes. The main active species responsible for degradation were O3, .OH, .O2-, and 1O2. DBD/O2 process also showed high efficiency in degrading and mineralizing o-Nitrochlorobenzene (o-NCB) and chlorobenzene (CB). The study proposed three common degradation pathways and demonstrated the potential of DBD/O2 process in treating CACs contaminated soil.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Huihui Zhang, Shilin Song, Qingjie Xie, Yansheng Du, Yuyue Huang, Kun Hu, Chundu Wu, Qiangshun Wu, Huijuan Wang
Summary: This study investigated the efficient degradation of sulfamethoxazole (SMX) by coupling dielectric barrier discharge (DBD) plasma and MnO2-Fe3O4-cellulose acetate (MnO2-Fe3O4-CA) film catalyst. The successful preparation of the MnO2-Fe3O4-CA film was confirmed by SEM, XRD, FT-IR, and XPS. The optimal composition of MnO2-Fe3O4 and CA was determined, and the addition of 3% 3:1 MnO2-Fe3O4-CA films into the DBD system resulted in a 93.55% removal rate of SMX. Mechanism analysis revealed the involvement of & BULL;OH, & BULL;O2 , and 1O2 in SMX degradation. The MnO2-Fe3O4-CA catalyst promoted Fenton reaction and ozone decomposition, generating more reactive oxygen species responsible for the increased SMX degradation. The cyclic experiments demonstrated the repeatability and stability of the film. Four degradation routes of SMX were identified, and the toxicity was evaluated.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Jingyu Ren, Zhouzhou Yao, Qian Wei, Ruotong Wang, Long Wang, Yuan Liu, Zixi Ren, He Guo, Zhirui Niu, Jian Wang, Yanzhong Zhen
Summary: In this study, chloramphenicol antibiotic was successfully degraded by water falling film dielectric barrier discharge (WFFDBD) in combination with FeO catalyst. Experimental and theoretical simulation results demonstrated that the formation of (OH)-O-center dot played a major role in catalytic effect, and the presence of FeO and oxygen vacancies contributed to the enhancement of reaction efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Samane Hosseini, Mahdi Kadivar, Hajar Shekarchizadeh, Mohammad Saeed Abaee, Mohammad Ali Alsharif, Mehdi Karevan
Summary: In this study, the surface of PLA/EC blend film was modified using DBD plasma treatment to facilitate the spin-coating of CH and PEP. The suitable plasma treatment condition was determined to be 5 min at 20 kV. The PEP-coated film exhibited better antioxidant and antibacterial properties, making it a promising candidate for food packaging.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Electrical & Electronic
Kaiyue Wu, Jingnan Liu, Jiacun Wu, Mo Chen, Junxia Ran, Xuexia Pang, Pengying Jia, Xuechen Li, Chenhua Ren
Summary: This article reports a double-mode argon planar plume, which operates in the streamer mode and transits to the filamentary mode. Discharge characteristics and plasma parameters are compared for the two modes, showing that the streamer mode and the filamentary mode correspond to pulsed and humped discharges respectively. Fast photography reveals that the streamer-mode plume is composed of stochastically branching streamers, while the filamentary-mode plume results from a series of moving filaments similar to those in barrier discharge. The filamentary mode has lower excited electron temperature and vibrational temperature, whereas higher electron density and gas temperature, and it achieves better hydrophilicity of polyethylene terephthalate surface.
Article
Chemistry, Physical
Juchan Kim, Chaesung Lim, Dongmin Lee, Hayoung Jeong, Jeong Woo Han, Kyoung-Su Ha
Summary: Lanthanum-based perovskite catalysts combined with non-thermal plasma can enhance the performance of partial oxidation of methane. Surface oxygen species of the perovskite catalysts play a crucial role in the reaction. Sr-doped LaAlO3 catalysts show improved H2 selectivity and slightly higher CO selectivity due to enhanced oxygen transfer capability.
JOURNAL OF CATALYSIS
(2023)
Article
Environmental Sciences
Jingren Yang, Deqian Zeng, Muhammad Hassan, Zhongbao Ma, Lingqian Dong, Yu Xie, Yiliang He
Summary: This study successfully eliminated BPA using DBD non-thermal plasma, achieving a 96.8% removal of chemical oxygen demand and identifying key intermediates in BPA degradation. The results suggested that (OH)-O· was the main reactive oxygen species for BPA degradation.
Article
Physics, Applied
Abdulkadir Yayci, Tim Dirks, Friederike Kogelheide, Miguel Alcalde, Frank Hollmann, Peter Awakowicz, Julia E. Bandow
Summary: This study delves into plasma-driven biocatalysis using enzymes, finding that specific immobilization methods can effectively protect enzyme activity, while chemical scavengers and chaperone proteins did not prolong enzyme lifespan.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Green & Sustainable Science & Technology
Nan Jiang, Xiaoqi Kong, Xiaoling Lu, Bangfa Peng, Zhengyan Liu, Jie Li, Kefeng Shang, Na Lu, Yan Wu
Summary: This study focuses on the investigation of a nanosecond pulsed sliding dielectric barrier discharge (SLDBD) and its application in degrading a chlorinated VOC. The research reveals that the propagation of surface streamers is greatly influenced by the negative DC voltage applied, leading to an increase in the production of excited species and improved degradation efficiency.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Materials Science, Ceramics
Xinhao Zhao, Nianping Yan, Yueji Li, Zikui Shen, Rongxia Huang, Chen Xu, Xuetong Zhao, Xilin Wang, Ruobing Zhang, Zhidong Jia
Summary: In this study, a new defect engineering technology called dielectric barrier discharge (DBD) was used to increase the oxygen vacancy concentrations in different ceramic green billets. DBD treatment significantly increased the oxygen vacancy defect concentration and conductivity of ZnO samples. Additionally, the DBD treatment modified the defect concentration and conductivity of TiO2 and 3YSZ green billets, altering the flash sintering (FS) process.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Engineering, Chemical
Oleg Golubev, Anton Maximov
Summary: The problem of CO2 waste in the atmosphere is a major concern, and methods of CO2 utilization are being currently developed. In this study, a plasma-catalytic process is used to dissociate CO2. A series of catalysts containing MgO and CeO2 were synthesized, and their properties were characterized. It was found that the catalyst surface, composition, and phase content remained unchanged under dielectric barrier discharge conditions. The excellent catalytic activity of the MgCe-Al sample was attributed to the combination of weak basic sites and oxygen vacancies on the catalyst surface.
Article
Engineering, Environmental
Xiaoyu Hu, Baowei Wang
Summary: The degradation of pefloxacin solution using DBD plasma was studied in this paper, and factors affecting the degradation rate were identified. The role of O-3 and H2O2 in the degradation process was investigated, and the primary active species was determined to be center dot OH. Intermediate products generated during degradation were analyzed, and possible degradation mechanisms and pathways were proposed based on the results.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Food Science & Technology
A. Niveditha, R. Pandiselvam, V. Arun Prasath, Sushil Kumar Singh, Khalid Gul, Anjineyulu Kothakota
Summary: Unsafe foods and water bodies are major causes of disease outbreaks in India, with E. coli being the predominant pathogen. Cold plasma and ozone technologies show promise in effectively decontaminating E. coli in foods while minimizing quality and nutrient losses, potentially replacing conventional decontamination techniques in the food industry.
Article
Engineering, Environmental
Zhuowei Cheng, Miaomiao Qu, Dongzhi Chen, Jianmeng Chen, Jianming Yu, Shihan Zhang, Jiexu Ye, Jun Hu, Jiade Wang
Summary: This study investigated the production and mechanism of active substances in dielectric barrier discharge reactions in different reaction atmospheres. The interactions between different active substances were found to have synergistic or inhibitory effects. Experiments showed that the removal of chlorobenzene by plasma in air atmosphere was affected by the presence of various active substances.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)