Article
Engineering, Environmental
Junyi Xiang, Luwei Bai, Xi Lu, Mingshuai Luo, Qingyun Huang, Shengqin Zhang, Xuewei Lv
Summary: This study aims to enhance vanadium extraction from high chromium-bearing vanadium slag through mechanical activation. The results demonstrate that mechanical activation can decrease particle size, increase surface area, and improve the activity and leaching efficiency of vanadium.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Qi Liu, Xiaoxue Zhao, Xianghai Song, Xin Liu, Weiqiang Zhou, Huiqin Wang, Pengwei Huo
Summary: The global economy, environmental problems, and greenhouse effect have been a concern for countries worldwide. This study focuses on the development of hybrid photocatalytic nanostructures to reduce CO2 emissions and improve the efficiency of electron transfer. The introduction of ultrathin Pd nanosheets enhances the reaction and widens the absorption area of the composite material.
INORGANIC CHEMISTRY
(2022)
Article
Crystallography
Tao Zhang, Wang Zhou, Yuanyuan Li, Qian Ye, Xiaowen Yu, Zhao Chen
Summary: This paper investigates the effects of CaO on the phase evolution mechanism of vanadium slag in the processes of slagging, direct roasting, and (NH4)(2)CO3 leaching. The results show that with increasing CaO content, vanadium is concentrated in spinels, titanium is transformed into CaTiO3, and phosphorus is concentrated and transformed into different compounds. In the direct roasting process, some vanadium phases react with Ca2SiO4 to produce soluble calcium vanadate, while others decompose into insoluble vanadium oxides. Additionally, (NH4)(2)CO3 leaching solution can inhibit the leaching of certain compounds in the vanadium slag.
Article
Chemistry, Physical
Rongqiang Yin, Jianjun Chen, Liang Shan, Jianqiang Shi, Kun Yang, Hao Liu, Junhua Li
Summary: Selective catalytic reduction (SCR) over V2O5/TiO2-based catalysts is an efficient technology for removing nitrogen oxides from stationary sources in the presence of H2S and NOx. H2S was found to be six times more poisonous than SO2, with polymeric sulfate being the main contributor to H2S poisoning. The generation of sulfates was energetically more favorable under H2S, causing deposition and damage to V--O. Polymeric sulfate inhibited charge transfer and NH3 activation, resulting in significant SCR activity suppression. Unstable sulfur species were responsible for temporary deactivation during H2S poisoning. This work provides crucial insights for solving catalyst deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Jiawei Wen, Pengge Ning, Zhi Sun, Wenting Jia, Hailun Yang, Qingzhen Han, Jun Yang, Hongbin Cao
Summary: The essence of metal solvent extraction lies in the interaction between metal species and organic extractants. By quantitatively tuning metal species and establishing a three-dimensional model, the authors have successfully extracted critical metals and provided insights for industrial solvent extraction.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Xukun Zhang, Fancheng Meng, Zhaowu Zhu, Desheng Chen, Hongxin Zhao, Yahui Liu, Yulan Zhen, Tao Qi, Shili Zheng, Meng Wang, Lina Wang
Summary: A novel process for extracting high-purity vanadyl sulfate solution from the leach liquor of sodium-roasted vanadium slag was proposed and optimized in this study. The process involves selective reduction-precipitation of chromium and solvent extraction of vanadium, effectively removing chromium and recovering vanadium.
Article
Multidisciplinary Sciences
Jong Hyuk Jeon, Ana Belen Cueva Sola, Jin-Young Lee, Rajesh Kumar Jyothi
Summary: The study compared the soda roasting process of spent SCR catalyst with dissolved NaOH to the usual dry roasting with NaOH, and its impact on subsequent water leaching. By optimizing parameters such as roasting temperature, time, and leaching process, the research achieved a significant reduction in roasting temperature and leaching time, resulting in a high leaching efficiency of vanadium and tungsten while minimizing silicon impurities.
SCIENTIFIC REPORTS
(2021)
Article
Metallurgy & Metallurgical Engineering
Hong Liu, Yi-min Zhang, Tao Liu, Jing Huang, Li-ming Chen, You-wen Hu
Summary: A process for preparing vanadium electrolyte accompanied by the recovery of valuable elements from vanadium shale was proposed. Under the optimal extraction conditions, a vanadium extraction rate of 99.3% and a vanadium stripping rate of 99.8% were achieved. The study also analyzed the composition and electrochemical performance of the electrolyte, showing that chloride ions in the leaching solution promoted vanadium extraction.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Engineering, Chemical
Yibo Hu, Nannan Xue, Yimin Zhang, Pengcheng Hu
Summary: This research introduced the SpHR technology into the vanadium precipitation process, achieving a high efficiency of vanadium precipitation. Under optimal conditions, the vanadium precipitation efficiency reached 99.61%, and the purity of the precipitate stabilized at 99.11% after three cycles of SpHR. The SpHR process of vanadium precipitation is controlled by chemical reaction, and H-2 exhibits sufficient reducing activity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Physical
Haoyang Zhao, Pei Wang, Jinxu Li
Summary: Increasing vanadium content improves the resistance to hydrogen embrittlement in bolt steels, with vanadium precipitates acting as reversible hydrogen traps that inhibit hydrogen-dislocation interactions. Lower dislocation density and finer martensitic structure also contribute to hindering hydrogen-induced cracking.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Yutao Zhang, Ruzhen Zhao, Xiaohuan Zhang, Qifeng Wei, Xiulian Ren, Ziwen Ying
Summary: In this study, a novel and cleaner production process was developed to remove impurity anions by precipitation and purify vanadium by solvent extraction using an ionic liquid. The optimized precipitation process effectively removed most of the impurity anions. The vanadium extraction and stripping efficiency reached high levels, resulting in obtaining V2O5 product with a purity of over 99.8%. The extraction mechanism of vanadium (V) with the ionic liquid was investigated in-depth and the essence of the extraction process was explained at the molecular level.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Zhenghao Wang, Liang Chen, Zhifeng Qin, Hongyang Yang, Xiaodong Guo, Bin Liang, Dongmei Luo
Summary: A novel strategy of speedy acidification of static sodium vanadate (NaVO3) solution and vanadium slag leaching solution for vanadium hydrolysis was proposed in this study to achieve high-efficiency hydrolysis. The results showed that NaVO3 solution could be rapidly nucleated within 10 s and completely hydrolyzed in 30 min at a higher pH value of 2.4 and a lower temperature of 80°C, with a precipitation efficiency as high as 99%. Compared to the conventional hydrolysis method, the new method could shorten the reaction time, decrease acid dosage, and save energy.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Microbiology
Zhuqing Mao, Nicolai Mueller, Sabrina Borusak, David Schleheck, Bernhard Schink
Summary: Phosphite is a stable phosphorus compound that played a significant role in the phosphorus content of the prebiotic Earth's crust. Many bacteria use phosphite as a phosphorus source and convert it to phosphate for synthesizing cell constituents. Only two anaerobic bacteria have been found to use phosphite as an electron donor for their energy metabolism. The key enzyme involved in this metabolism is a phosphite dehydrogenase that phosphorylates AMP to ADP.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shu-Lin Meng, Chen Zhang, Chen Ye, Jia-Hao Li, Shuai Zhou, Lei Zhu, Xu-Bing Li, Chen-Ho Tung, Li-Zhu Wu
Summary: In this study, cobaloximes are demonstrated as a bioinspired molecular platform for ammonia synthesis through electrocatalytic reduction of NO2-. The cobaloximes achieved 98.5% faradaic efficiency under close-to-neutral conditions. Mechanistic studies showed that cobaloximes effectively bind with NO2- and nitrogenous intermediates and facilitate rapid electron and proton transfer. The cobaloxime catalyst, when integrated with multi-walled carbon nanotubes as working electrodes, exhibited advantageous ammonia yields and high efficiency. Furthermore, the cobaloxime-catalyzed NO2- to NH4+ transformation, when coupled with plasma-driven N-2 oxidation, enabled the conversion of ambient air into NH4Cl at a mmol-scale.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Chao Hu, Yuming Dong, Wei Zhang, Hongling Zhang, Peng Zhou, Hongbin Xu
Summary: This study proposes a simple, green and low-cost method to prepare mixed valent vanadium electrolyte for vanadium redox flow batteries (VRFB). By using clean hydrogen as the reducing agent and Pt/C as the catalyst, the impurity-free mixed valent vanadium electrolyte is obtained, exhibiting excellent battery performance. Additionally, a catalytic reactor is designed and used for continuous production of the electrolyte. Cost analysis shows that the proposed catalytic hydrogen reduction process can significantly reduce manufacturing costs.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Shenxu Bao, Yongpeng Luo, Yimin Zhang
Summary: The aim of this investigation was to prepare a geopolymeric precursor from vanadium tailing through thermal activation and modification. The research found that during thermal activation, the vanadium tailing was corroded by sodium hydroxide, forming a sodium silicate coating. When water was added, the sodium silicate coating dissolved and released silicon species, creating an alkaline solution environment. Metakaolin dissolved in the alkaline environment to generate aluminum species, which then underwent geopolymerization to produce a geopolymer with excellent mechanical performance. This investigation improves the feasibility of using geopolymer technology for large-scale and in-situ applications, and promotes the utilization of vanadium tailing and other silica-rich solid wastes.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Electrochemistry
Xueli Wan, Shenxu Bao, Yimin Zhang
Summary: The carbonization process of 2-methylimidazole zinc salt to obtain ZDPC porous carbon was explored. The ZDPC/AC composite electrode showed a high electrosorption capacity for V(V). The results indicate the huge potential application of ZDPC in the field of capacitive adsorption for metals.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Bo Chen, Shenxu Bao, Yimin Zhang, Liuyi Ren
Summary: In this study, a novel and environmentally friendly technique of using ultrasound to enhance the ammonium salt precipitation process of vanadium was proposed. The results showed that the ultrasound precipitation method can achieve similar vanadium precipitation rate and purity compared to the regular precipitation method, while significantly reducing the reaction time and ammonium salt consumption. The products obtained by ultrasound precipitation method also exhibited more uniform particle size distribution and regular crystal shape.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Wei Ding, Shenxu Bao, Yimin Zhang, Junhui Xiao
Summary: This study systematically investigated the effect and mechanism of ultrasound on the leaching of gallium and zinc from corundum flue dust (CFD). The results showed that ultrasound could significantly increase the leaching efficiencies of gallium and zinc. The enhancement of ultrasound was attributed to the breaking of particle agglomerates, improving sulfuric acid diffusion, and accelerating the reaction between sulfuric acid and amorphous silicate.
MINERALS ENGINEERING
(2022)
Article
Materials Science, Ceramics
Linhui Luo, Peng Du, Yun Lei, Yongqin Wang, Beibei Du, Can Li, Yuncui Wu, Shenxu Bao, Wenmao Tu, Bingsuo Zou
Summary: In this study, GQDs/W18O49/WO3 (WCW) were loaded on g-C3N4 with defects (CN1-x) using hydrothermal synthesis. The CN1-x@WCW composites exhibited improved photoelectric efficiency, interfacial electron transfer, and electron lifetime compared to WCW.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chi Ma, Shenxu Bao, Yimin Zhang, Yongpeng Luo, Yaqiong Gui, Yanzeng Ren
Summary: The recycling of sewage sludge and fly ash is important for solid waste disposal. In this study, non-sintered ceramsite was prepared using alkaline activators and room temperature curing. The composite activation by sodium hydroxide and calcium oxide showed better results than individual activation. The formed sodium silicate hydrate and hydrated calcium silicate gels helped in forming a denser structure. The ceramsite met the standard requirements with high compressive strength.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yizhong Yuan, Yimin Zhang
Summary: Under China's strict carbon emission policy, the total wet extraction technology without roasting will dominate the field of vanadium extraction. Microwave pretreatment and particle size classification can enhance the grindability and leaching efficiency of vanadium-bearing shale, while reducing energy consumption.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Polymer Science
Changcheng Yuan, Jinyu Sun, Xiaohui Tian, Yizhong Yuan
Summary: Researchers have developed a simple and eco-friendly method to prepare fully bio-based and high-performance rubber films using latex-assembly and in situ cross-linking. The films possess excellent mechanical properties comparable to sulfur vulcanized rubber films, and they also exhibit appropriate permeability to moisture and achievable reprocessing, making them suitable for wearable devices.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Construction & Building Technology
Muyang Huang, Shenxu Bao, Yimin Zhang, Yongpeng Luo, Xianqing Xu, Ilidio Deocleciano Salomao Dos Santos
Summary: In this study, cementitious materials (CM) were prepared using burnt coal cinder (BCC) as the raw material, and the compressive strength of BCC-based CM reached 45.53 MPa. The absorption of P was inhibited by adding sufficient exogenous Si. Microstructure analysis revealed a more homogeneous distribution of gel phases in the ternary system of Ca-Si-P, resulting in a more compact and stronger microstructure.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Energy & Fuels
Shenxu Bao, Chunfu Xin, Yimin Zhang, Bo Chen, Wei Ding, Yongpeng Luo
Summary: Water resources are essential for human survival and development, but water pollution and scarcity pose major challenges. Capacitive deionization (CDI) has emerged as a promising water treatment technology, offering advantages such as low energy consumption, high efficiency, low cost, and environmental friendliness. This paper provides a comprehensive overview of CDI's applications in water treatment, including heavy metal and organic contaminant removal, water softening, phosphate and nitrate removal, and water disinfection. It also discusses the latest research progress on energy recovery and consumption assessment in the CDI process, as well as the challenges and future opportunities for CDI technology.
Article
Materials Science, Multidisciplinary
Sheng Li, Yimin Zhang, Yizhong Yuan, Pengcheng Hu
Summary: Microwave heating was used to improve acid leaching in this study. The effects of various factors on vanadium recovery were investigated through analysis and simulation. A vanadium recovery of 80.66% was achieved using microwave heating. Compared to conventional leaching, microwave-assisted leaching increased vanadium recovery by 6.18% and reduced leaching time by 79.17%.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Polymer Science
Yifei Gao, Jinyu Sun, Xiaohui Tian, Yizhong Yuan
Summary: In this study, polyaniline (PANI) was successfully coated onto the surface of epoxidized natural rubber (ENR) nanospheres to form PANI@ENR composites with a core-shell structure. At a PANI content of 5 wt%, the composites exhibited excellent comprehensive properties due to the optimally conductive networks of PANI. The strain-sensing tests demonstrated that the PANI@ENR composites had two successive linear sensing ranges (gauge factor of 7.3 in 0-400% strain, gauge factor of 1.8 in 400-1000% strain) and excellent cycling stability (over 2500 cycles at 0-50% strain). Furthermore, PANI@ENR-based strain sensors were capable of real-time monitoring of the movements of human finger joints, elbow joints, and knee joints, indicating their wide range of potential applications in wearable flexible electronics.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Applied
Qianqian Wang, Haofeng Zhang, Yanling Xu, Shenxu Bao, Cheng Liu, Siyuan Yang
Summary: Native starches and their phosphates were used as depressants for the flotation of quartz from hematite. Starch phosphates exhibited stronger depressing abilities than native starches. The proposed adsorption model insights will significantly promote the development of starch-based depressants for iron ore flotation and other mineral processing applications.
CARBOHYDRATE POLYMERS
(2023)
Article
Geochemistry & Geophysics
Chenyu Fan, Liuyi Ren, Yimin Zhang, Shenxu Bao, Zhilu Yang
Summary: In this study, different doses of sodium hexametaphosphate (SHMP) were added as grinding aids in the process of muscovite grinding, and the effect of SHMP on the grinding efficiency of muscovite was investigated. The results demonstrated that the grinding efficiency increased significantly with the increase in SHMP dosage. Various test methods were used to analyze the mechanism of SHMP in improving the grinding efficiency of muscovite. It was found that SHMP physically adsorbed on the muscovite powder, resulting in the destruction of the ordered structure of muscovite crystals, surface roughening, and the appearance of cracks. This improved the pulp environment and dispersion of muscovite powder, leading to enhanced grinding efficiency.
Article
Geochemistry & Geophysics
Liuyi Ren, Ziwei Jiao, Yimin Zhang, Shenxu Bao
Summary: In this study, the crystal cells of muscovite were optimized using Materials Studio 7.0 software. Some properties of the (002) crystal plane and (131) crystal plane were calculated to analyze their influence on flotation behavior. XRD and flotation analysis revealed that the (002) crystal plane had higher surface energy and was more easily exposed compared to the (131) crystal plane. Simulation results suggested that exposing more (131) crystal planes during the grinding stage can improve flotation efficiency.
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)