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)
Article
Engineering, Environmental
Yinyin Zhang, Han Zhang, Ai Zhang, Paul Heroux, Zhuyu Sun, Yanan Liu
Summary: Dielectric barrier discharge (DBD)-biochar sequential batch experimental technology was used to degrade atrazine (ATZ) in soil. DBD treatment increased the hydrophilicity, particle size, and instability of soil particles, leading to the exposure of residual ATZ. Biochar introduction compensated for the shortcomings of sole DBD treatment and enhanced ATZ removal efficiency. Proposed ATZ degradation mechanisms included various reactions, such as dealkylation, dechloro-hydroxylation, and alkylic-oxidation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Hongyu Lu, Wei Gao, Chengxun Deng, Xiaowei Liu, Weiping Li, Zhimin Yu, Haitao Ding, Ling Zhang
Summary: Single degradation systems based on dielectric barrier discharge plasma (DBDP) or persulfate (PS) oxidation are not effective in degrading atrazine (ATZ) in river sediment. In this study, a DBDP/PS synergistic system was used, and a mathematical model was established to optimize the degradation process. The results showed that the degradation efficiency of ATZ in river sediment reached 96.5% after 10 minutes of treatment. The system also effectively mineralized ATZ into less toxic byproducts. Active species in the system were found to contribute to the degradation of ATZ, and the degradation pathway was elucidated. This study demonstrates that the DBDP/PS synergistic system is a highly efficient and environmentally friendly method for remediating ATZ pollution in river sediment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(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
Engineering, Environmental
Lixian Zhao, Yabing Sun, Rui Qiu, Hao Sun, Jingwei Feng
Summary: The degradation pathways and mechanism of rhodamine B using a novel liquid film dielectric barrier discharge plasma reactor were investigated. The results showed that the atmosphere of the discharge area and the input power significantly affected the removal of rhodamine B. Liquid chromatography mass spectrometry was used to identify the degradation intermediates of rhodamine B and propose possible degradation pathways.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Rongjie Yi, He Guo, Huijuan Wang, Daolin Du, Qi Zhang, Chengwu Yi
Summary: This study investigated the degradation of oxytetracycline in aqueous solution by humid O2 strong ionization dielectric barrier discharge and identified optimal parameters for efficiency. Increasing the input voltage and solution pH can improve OTC removal efficiency, while inhibitors and organic matter can reduce efficiency. Compared to dry O2 strong ionization dielectric DBD, the results showed better performance with humid O2 strong ionization discharge DBD.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Andere Clement Miruka, Ai Zhang, Qiancheng Wang, Dahai Zhu, Zheng Wang, Zhuyu Sun, Paul Heoux, Yanan Liu
Summary: The study successfully degraded glucocorticoids in water using a self-made reactor and found that the efficiency of the DBD/MB/PMS system was higher than traditional methods. The research also revealed that SO4-center dot and (OH)-O-center dot were key species in the degradation of glucocorticoids.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Jiushan Cheng, Yangyang Fan, Xueyun Pei, Di Tian, Zhongwei Liu, Lizhen Yang, Eric Feng, Hai-Feng Ji, Qiang Chen
Summary: In this study, SF-DBD plasma source was used to successfully degrade PFOA from water, achieving a degradation efficiency of up to 99% and a 63% reduction in total organic carbon concentration. This technique has great potential for application.
Article
Water Resources
Mohammed Al Bratty, Abdul Jabbar Al-Rajab, Zia Ur Rehman, Mukul Sharma, Hassan A. Alhazmi, Asim Najmi, Hisham M. A. Muzafar, Sadique A. Javed
Summary: The study successfully demonstrated an efficient method for removing caffeine from aqueous solution using a laboratory scale DBD plasma system, achieving removal efficiencies of 72.6% and 96.6% for initial concentrations of 100 and 1 μg/mL, respectively, at an initial pH of 7 with 60 W input power. Caffeine degradation was less effective in acidic solutions and minimal in alkaline solutions, with degradation enhanced by increasing the input power in the DBD system. The DBD system operated effectively without the use of catalysts, expensive gases, or organic solvents, achieving significant degradation of caffeine in a short treatment time (4 min).
APPLIED WATER SCIENCE
(2021)
Article
Food Science & Technology
Shiwen Cheng, Han Cai, Meng Yi, Liang Dong, Jingfeng Yang
Summary: This study investigated the effect of dielectric barrier discharge on sea cucumber polysaccharide and found that it can depolymerize polysaccharide into homogeneous and controllable-size oligosaccharide products with anti-inflammatory properties.
Article
Environmental Sciences
Xiaomei Yao, Yingbo Fang, Xiaochen Cui, Xian Cheng, Zixia Cheng
Summary: This study investigates the degradation of methylene blue (MB) using a coupled system of double dielectric barrier discharge (DDBD) and CoOOH catalyst. The results show that the addition of CoOOH significantly improves the degradation performance of MB, with higher removal rates and energy efficiency. Furthermore, the addition of CoOOH enhances the removal rates of total organic carbon (TOC) and chemical oxygen demand (COD) of MB.
Article
Engineering, Environmental
Ruoyu Deng, Dongxu Yang, Mengli Chen, Qiang He, Qingjuan He, Yi Chen
Summary: Nonthermal plasma has been extensively studied for its ability to remove emerging organic micro-pollutants, but its high energy consumption limits its economic feasibility. In this study, sulfadiazine degradation was achieved in an optimized dielectric barrier discharge (DBD)-Contact system, which showed higher energy efficiency compared to a conventional DBD system. The reactive species generated by discharge plasma played a crucial role in sulfadiazine removal, and the DBD-Contact/PMS system exhibited good applicability in various water samples. This study provides new insights for the practical application of DBD technology in water treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Huijuan Wang, Zhou Shen, Xin Yan, He Guo, Danni Mao, Chengwu Yi
Summary: This study utilized DBDP technology and the catalysis of nano WO3 to investigate the degradation of BPA in the DBDP/WO3 synergistic system. The results showed that WO3 had a good catalytic effect in the DBDP system, could degrade BPA, and speculated on the mechanism of BPA degradation.
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
Engineering, Environmental
Ying Wei, Guanglu Lu, Dongrun Xie, Tianyi Sun, Yu Liu, Ying Zhang, Jiutao An, Menghong Li, He Guo
Summary: A novel technology of coupling dielectric barrier discharge and ultraviolet was investigated to efficiently degrade enrofloxacin. The addition of H2O2 and K2S2O4 improved the degradation rate. The presence of NO3-, SO(4)(2-), Cl-, and CO32- affected the degradation differently. & BULL;OH played an important part in the degradation. DFT analysis revealed the degradation mechanisms of ENRO.
CHEMICAL ENGINEERING JOURNAL
(2022)
