Article
Chemistry, Physical
Yue Tang, Guohua Ye, Hao Zhang, Xuanxiong Kang, Siqin Zhu, Xueyin Liang
Summary: The solvent extraction of vanadium from stone coal vanadium ore leachate was achieved using D2EHPA. The interactions between D2EHPA and vanadium were investigated, showing that coordination bonds and cyclic chelate complexes were formed. Chemical analysis revealed that D2EHPA exhibited stronger coordination with VIV (VO2+) compared to FeII, minimizing iron extraction.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Sina Shakibania, Alireza Mahmoudi, Mohammad Mokmeli
Summary: A selective process for separating vanadium and iron from steelmaking slag is proposed in this study. The process involves leaching, cementation, and solvent extraction stages. The experimental results show that D2EHPA and Aliquat 336 are effective extractants for vanadium extraction with different oxidation states. The study also reveals the extraction mechanism of vanadium through both anion and cation exchange reactions.
MINERALS ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Jie Zhang, Kunpeng Liu, Baijun Yan
Summary: A new synergetic and cleaner method was proposed and verified to alleviate the difficulties of extracting vanadium from high-carbon stone coal and solve the associated pollution problems. The experimental results showed that the method effectively increased the gasification ratio and rate of carbon, and a high-grade vanadium concentrate was obtained through magnetic separation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Zidong Tan, Yong Zhen, Chang Wei, Xin Jin, Xingbin Li, Gang Fan, Xingguo Luo
Summary: In this study, germanium was selectively extracted using an organic phase containing YW100, D2EHPA, N235, and kerosene. The extraction process achieved a high extraction ratio and the addition of N235 improved the phase separation performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Metallurgy & Metallurgical Engineering
Shuai Yuan, Yong-hong Qin, Yong-peng Jin, Yan-jun LI
Summary: An innovative suspension roasting-leaching technology in the atmosphere has been proposed to improve vanadium extraction from refractory stone coal. The technology achieved a vanadium leaching rate of 47.14% at a roasting temperature of 800 degrees C, a roasting time of 20 min, and a gas flow rate of 400 mL/min, compared to a previous rate of 20%. The surface of the stone coal became rough and irregular during the suspension roasting process, increasing the specific surface area of the particles and destroying the lamellar structure of silicate minerals, resulting in the release of vanadium. Additionally, the vanadium in the stone coal was oxidized to V(V) or V(IV). The results indicate that the improved leaching rate is attributed to the release and transformation of vanadium during suspension roasting.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
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
Shuai Yuan, Mengyu He, Ruofeng Wang, Yongpeng Jin, Yanjun Li
Summary: An innovative multistage suspension roasting technology is proposed for vanadium leaching from stone coal. The results show that carbon removal of 53.13% is achieved in the first-stage roasting, accompanied by disruption of the vanadium-bearing mica lattice and production of dehydrogenated mica through the release of hydroxyl groups and vanadium. In the second-stage roasting, carbon is almost completely removed, and the mica structure is further destroyed and partially converted to feldspar. Under optimal conditions, the vanadium leaching rate increases from 20% using conventional technology to 51.42% using the presented technology.
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, Environmental
Zhenghao Wang, Zhifeng Qin, Liang Chen, Bin Liang, Yingming Zhu, Kejing Wu, Dongmei Luo
Summary: An environmentally friendly strategy for the direct recovery of low valence vanadium (LVV) from vanadium slag was proposed and investigated. The recovery of LVV was 68.38% in atmospheric leaching and increased to 98.34% in high-temperature self-pressure leaching conditions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Ziwen Ying, Yue Song, Keyu Zhu, Guixuan Wu, Yun Ju, Qifeng Wei, Xiulian Ren
Summary: A cleaner and sustainable method using amide as extractant was developed to recover vanadium and chromium from leaching solution. The co-extraction of V(V) and Cr(VI) in the chlorinated system achieved high extraction efficiencies, while the subsequent stripping process achieved high recovery efficiencies. The extracted vanadium and chromium could be selectively stripped, resulting in high purity products. The research also provided insights into the extraction mechanism and explored the reduction phenomenon of V(V) and Cr(VI).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Alok Kumar Nayak, Niharbala Devi, Kadambini Sarangi
Summary: This study investigated the extraction of Mo(VI) and V(V) from the simulated leach liquor of hydrodesulfurization spent catalyst using Cyanex 572 as the extractant. Different pH conditions affected the extraction rates of Mo(VI) and V(V). Adjusting the H2SO4 concentration and Cyanex 572 concentration could modulate the extraction efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Mining & Mineral Processing
Hui Li, Yuexin Han, Jianping Jin, Peng Gao, Zhenya Zhou
Summary: The purpose of this study is to use process mineralogy as a practical tool to investigate the causes of low leaching rates in the curing-leaching process of vanadium-bearing stone coal and propose solutions or improvements to optimize the leaching index. By analyzing the effects of particle size, mineral composition, and sulfuric acid curing on different stages of the curing-leaching process, it was found that thorough washing after sieving and optimizing the curing process are necessary for improving the leaching rate. The analysis and detection of key products are helpful for identifying problems and enhancing the curing-leaching circuit process.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yingbo Dong, Shijia Chong, Hai Lin
Summary: The recovery of vanadium from stone coal using bioleaching is a promising method. This study investigated the adsorption characteristics of Bacillus mucilaginosus on vanadium-bearing stone coal through bioleaching and biosorption experiments. The results showed that the pH value, bacterial concentration, and bacterial growth phase affected the biosorption of B. mucilaginosus on stone coal. The adsorption behavior was well described by the Freundlich model and the pseudo-second-order kinetic model.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Mining & Mineral Processing
Liuyi Ren, Zheyi Zhang, Weineng Zeng, Peipei Wang
Summary: This paper investigates the occurrence of vanadium in stone coal and proposes a potential technology for vanadium preconcentration. The mineralogical characterization of vanadium-bearing stone coal from Tongshan, Hubei, PR China was conducted using various analytical methods. The study finds that vanadium primarily exists as roscoelite in the stone coal, intergrown with other minerals. The results suggest that a roasting-gravity separation-classification process may be promising for pre-concentrating vanadium from stone coal.
JOURNAL OF MINING SCIENCE
(2022)
Article
Engineering, Chemical
Ziwen Ying, Manxing Huo, Guixuan Wu, Jie Li, Yun Ju, Qifeng Wei, Xiulian Ren
Summary: This study aimed to recover vanadium and chromium from the leaching solution of sodium roasting vanadium slag. EHEHPA was found to be the most suitable extractant for vanadium extraction, with a recovery rate of 99.91%. The study also investigated the effects of different parameters on the vanadium extraction process and the extraction mechanism.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
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
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
Engineering, Environmental
Ilidio Deocleciano Salomao Dos Santos, Shen Xu Bao, Baba Imoro Musah
Summary: In this study, a low-cost metakaolin-based geopolymer (MKG) was synthesized and applied to remove mercury from model wastewater. The results showed that MKG had good adsorption capacity and stability, and it was effective in removing mercury.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Construction & Building Technology
Yongpeng Luo, Shenxu Bao, Yimin Zhang
Summary: By using granite powder and waste marble to prepare glass-ceramics, the researchers were able to reduce the amount of solid waste generated during stone processing and obtain glass-ceramics that meet the requirements of building materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Ji Fang, Yingyong Ge, Zhijie Chen, Baolin Xing, Shenxu Bao, Qing Yong, Ruan Chi, Siyuan Yang, Bing-Jie Ni
Summary: A new reverse-direct flotation method was developed to purify high-silica phosphogypsum, effectively removing organic matters, fine slimes, and silica impurities. Through the closed-circuit flotation process, the whiteness and purity of the phosphogypsum concentrate were significantly improved, meeting the requirements of related standards for gypsum building materials.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Metallurgy & Metallurgical Engineering
Yu Liang, Shenxu Bao, Yimin Zhang, Bo Chen, Chen Yu
Summary: Imidazole-based ionic liquid was immobilized on polymer support and proven successful by various characterizations. The supported ionic liquid showed high adsorption capacity and excellent cyclic stability in the separation of vanadium (V) from a vanadium-containing solution.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2022)
Article
Engineering, Chemical
Guohao Chen, Liuyi Ren, Yimin Zhang, Shenxu Bao
Summary: This study aims to improve the recovery of fine muscovite by introducing nanobubbles (NBs), which can increase the flotation recovery by about 7% and reduce reagent dosage by 25% in the dodecylamine flotation system. NBs pretreatment reduces adsorption capacity and electrostatic repulsion, promotes particle agglomeration, accelerates the formation of three-phase contact line, and enhances the flotation efficiency of fine muscovite.
MINERALS ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Zheyi Zhang, Liuyi Ren, Yimin Zhang, Shenxu Bao
Summary: This paper studied the application of benzohydroxamic acid and sodium silicofluoride in the flotation of rutile and garnet. The results showed that benzohydroxamic acid had good collecting performance for both rutile and garnet, while sodium silicofluoride inhibited garnet. These reagents had certain effects on the chemical environment of rutile and garnet.
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
Jiong Chen, Yuncui Wu, Yun Lei, Peng Du, Can Li, Beibei Du, Yongqin Wang, Linhui Luo, Shenxu Bao, Bingsuo Zou
Summary: ZnxCd1-xSe and ZnxCd1-xSe/GQDs nanocomposites were synthesized using a hydrothermal method. The performance of ZnxCd1-xSe could be adjusted by changing the Zn/Cd ratio and introducing GQDs. The introduction of GQDs significantly improved the photoelectric performance of the semiconductor.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
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)
