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, Environmental
Zongyang Liu, Yalan Zhang, Shengyu Jiang, Shengyu Liu, Jing Cao, Yingwei Ai
Summary: This study investigates the synergistic catalytic degradation of toluene using Mn-Fe/rGO catalysts with DBD, showing high toluene conversion rate and selectivity towards O3 and NOx conversion. The results provide new insights into plasma catalytic oxidation of high-concentration organic pollutants.
JOURNAL OF ENVIRONMENTAL CHEMICAL 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
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
Environmental Sciences
Jingwei Feng, Peng Nian, Lu Peng, Aiyong Zhang, Yabing Sun
Summary: In this study, non-thermal plasma combined with zinc ferrite-reduced graphene oxide nanocomposites were used for the degradation of aqueous methylparaben. The combination showed approximately 25% higher efficiency in degrading MeP compared to NTP alone. Detailed analysis revealed the multi-catalytic mechanism and degradation pathways of MeP.
Article
Engineering, Chemical
M. Hatzisymeon, M. K. Daletou, G. Rassias, C. A. Aggelopoulos
Summary: An advantageous plasma-catalytic setup was developed for the degradation of trifluralin in soil. The addition of TiO2 and ZnO catalysts significantly increased the degradation efficiency, with TiO2 showing slightly better performance. The plasma-catalytic treatment also increased energy efficiency and reduced the inhibitory effect of soil moisture. The study supports the potential of plasma-catalytic soil remediation as a rapid, efficient, low energy-demanding, and environmentally friendly method.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Danni Mao, Xin Yan, Huijuan Wang, Zhou Shen, Chengwu Yi
Summary: In this study, rGO-WO3 nanocomposites were prepared and added into a DBDP system to investigate their catalytic effect on BPA degradation. The optimal catalytic effect was achieved at a dosage of 40 mg/L of rGO-WO3, with the highest degradation rate constant of BPA being 0.03129 min(-1). The results also showed higher TOC and COD removal rates, as well as confirmed the catalytic effect of rGO-WO3 through UV-Vis analysis.
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
Wenjiao Sang, Cheng Zhan, Shiwen Hao, Longjie Mei, Jiaqi Cui, Qian Zhang, Xi Jin, Cuihua Li
Summary: In this study, RGO-TiO2 composites were used in combination with dielectric barrier discharge plasma for phenol degradation. The presence of Cl- and SO42- inhibited the degradation of phenol, while NO3- had a lesser effect. The addition of CO32- significantly accelerated the degradation process, possibly facilitated by the generation of O3 and H2O2.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Kefeng Shang, Jingyu Ren, Qi Zhang, Na Lu, Nan Jiang, Jie Li
Summary: The study investigated a novel double-chamber dielectric barrier discharge (DBD) catalysis reactor, which effectively enhanced the degradation of benzene and inhibited the emission of gaseous byproducts by combining a gas phase packed-bed discharge chamber and a gas-liquid phase discharge chamber.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Bin Zhang, Tiantian Ping, Liwen Mu, Xiaohua Lu, Jiahua Zhu
Summary: We propose a method for the oxidative degradation of lignin using pulsed DBD plasma at ambient temperature and pressure, with water as the solvent and without catalysts. The discharge generates oxygen-active species that break the recalcitrant chemical bonds of lignin and promote the formation of aromatic monomers. Gas type, flow rate, pulse duty cycle and frequency, input power, and time were found to affect the degradation efficiency and energy yield. Under optimal conditions, the degradation efficiency of alkali lignin reached 72.50%, with an energy yield of 4.61 g/kW.h. This study provides a fast, green, and economical strategy for converting lignin into aromatic monomers.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Engineering, Environmental
Cao Fang, Changsheng Shao, Shenhao Wang, Yahui Wu, Chao Liu, Qing Huang
Summary: Antibiotics are widely used and their discharge into the environment poses a constant potential threat to the ecosystem. This study focused on the treatment of wastewater containing levofloxacin and sulfadiazine, two typical antibiotics, using atmospheric-pressure dielectric barrier discharge (DBD). The results showed that the total antibiotics removal efficiency could be improved compared to separate single antibiotic treatment. The role of plasma-induced reactive oxygen/nitrogen species (RONS) was examined, with hydroxyl radicals (OH) playing a major role in levofloxacin degradation and ozone and peroxynitrite also contributing to sulfadiazine degradation. The bio-toxicity evaluation demonstrated the safety of the DBD degradation products for the ecological environment.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
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
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
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)