Article
Chemistry, Multidisciplinary
Wei Du, Yue Gong, Yunfei Xu, Xinxu Zhang, Lei Zhang, Songbo Wang, Jun Xiang, Na Tang
Summary: The research found that dimerization cannot occur in ethanol and acetonitrile solutions of flufenamic acid (FFA), while form III directly nucleates from conformer III. The formation of stacked dimers through pi center dot center dot center dot pi interactions is verified as a key step in molecular preassembly during nucleation.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Marion Merle, Jeremy Soulie, Capucine Sassoye, Pierre Roblin, Christian Rey, Christian Bonhomme, Christele Combes
Summary: This article investigates the influence of pyrophosphate as an additive on amorphous calcium carbonate (ACC) and characterizes the resulting compounds comprehensively. The experimental results show that the amount and size of calcite crystallites decrease while the amorphous phase increases with increasing pyrophosphate content, eventually resulting in fully amorphous materials. Based on various analyses, an experimental model for pyrophosphate-stabilized ACC is proposed, providing insights into the underlying mechanisms of PyACC evolution.
Article
Chemistry, Multidisciplinary
Liulei Ma, Qixuan Zheng, Daniel K. Unruh, Kristin M. Hutchins
Summary: Salification of trimethoprim with enantiopure d- or l-lactic acid resulted in salts with significantly improved solubility, up to five times. Both salts exhibited polymorphism, and we demonstrated the fully reversible interconversion (cycling) between different drug polymorphs using mechanochemistry and slurry methods. Our findings revealed the necessity of solvent contact and mechanical force for drug polymorph interconversion, offering strategies for cycling between solid material forms.
CHEMICAL COMMUNICATIONS
(2023)
Article
Metallurgy & Metallurgical Engineering
L. A. Pasechnik, V. M. Skachkov, A. Yu Chufarov, A. Yu Suntsov, S. P. Yatsenko
Summary: Storage of red mud, a byproduct of bauxite processing, can lead to environmental issues due to its high alkalinity and particle dispersity. Scandium, the most valuable component of red mud, is poorly commercialized because of extraction costs, however, new efficient extraction technologies promise to reduce costs significantly. By sulfatising scandium concentrate extracted from red mud, silica can be separated from water-soluble sulfates, while crystallization of scandium and ammonium sulfates offers a selective separation method with high solubility in water.
Article
Chemistry, Physical
Jin Qin, Mingyang Ma, Pan Tan, Danqing Yi, Bin Wang
Summary: In this study, the effect of Sc content on the phase transformation of the 2519 alloy during solidification was investigated. It was found that the grain size of the 0.3-0.4Sc alloy was significantly reduced, and the formation of different types of W phases was observed. The results provide insights into the refinement of the alloy and the mechanisms of phase transformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Geochemistry & Geophysics
Jiaxin Wang, A. E. Williams-Jones, A. Timofeev, Jiajun Liu, Shunda Yuan
Summary: This study investigated the solubility and speciation of scandium in fluoride-bearing aqueous solutions. The results showed that ScF2+ and ScF3o were the dominant species, and scandium fluoride complexes were more stable than scandium hydroxide complexes and Sc3+ in acidic aqueous fluids. Modeling based on experimental data indicated that fluoride-bearing aqueous fluids could dissolve sufficient scandium to form a hydrothermal ore deposit. This study provides essential thermodynamic data for understanding the mobilization and concentration of scandium in fluoride-bearing hydrothermal systems.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Chemistry, Physical
B. S. Liu, H. X. Li, Y. P. Ren, H. B. Xie, H. C. Pan, M. Jiang, G. W. Qin
Summary: Investigation of phase relationships in the Mg-rich corner of the Mg-Zn-Gd ternary system at 400-475 degrees C reveals changes in equilibrium states, coexistence phenomena, and peritectic eutectic transformations. The compositions of the Z, I, F, and W phases and the solubility of Gd in the alpha-Mg solid solution are significantly affected by the addition of Zn when the phases are in equilibrium.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Medicine, Research & Experimental
Maxime D. Charpentier, Raghunath Venkatramanan, Celine Rougeot, Tom Leyssens, Karen Johnston, Joop H. ter Horst
Summary: Chiral molecules pose challenges for the pharmaceutical industry as they exhibit different effects in chiral systems. The separation of chiral molecules is complex but can be achieved by creating an asymmetry in the thermodynamic system. This study developed a new chiral quantification method that can be applied to complex multicomponent chiral systems.
MOLECULAR PHARMACEUTICS
(2023)
Article
Chemistry, Multidisciplinary
Hannah McTague, Ake C. Rasmuson
Summary: The nucleation kinetics of the theophylline/glutaric acid cocrystal system in chloroform was investigated through small-scale induction time experiments. The presence of theophylline in the mixed solution increased the solubility of beta-glutaric acid and facilitated its nucleation. Compared to nucleation from a pure solution, nucleation of beta-glutaric acid from the mixed solution required a significantly higher driving force due to a higher interfacial energy.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Engineering, Environmental
Hawzhin Amanollahi, Gholamreza Moussavi, Somayeh Ostovar, Stefanos Giannakis
Summary: This paper discusses a versatile approach to the crystallization of ammonium carnallite through a highly efficient process of ammonium removal from an aqueous solution on MgO(111) surface. In addition to effectively removing ammonium and recovering it as ammonium carnallite, this approach also allows for the recovery of magnesium as carnallite crystals. The study shows that MgO nanoparticles have high adsorption potential due to their high index surfaces of (111), and the active sites on the MgO(111) surface play a crucial role in ammonium adsorption. Various analyses confirm the synthesis of single-crystal carnallite, and TGA tests demonstrate the decomposition process of ammonium carnallite and the formation of MgO. The results reveal a high recovery rate of ammonium using MgO nanoparticles in the adsorption/crystallization process.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Jinqiu Fu, Fan Wang, Yuzhong Shi, Chiyi Wang, Jingjing Zhao, Yihang Hou, Wei Zhuang, Hanjie Ying, Pengpeng Yang, Keke Zhang
Summary: This study compared the thermodynamic properties of two crystalline forms of glutathione and explored the transformation process between them. The solubility of glutathione increased with increasing mole fraction of water and temperature. Based on the calculations of solubility and mixing thermodynamic properties, Form & beta; was determined to be the stable form, and a solvent-mediated transformation from Form & alpha; to Form & beta; was observed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Liming Zhang, Leiting Shen, Qiusheng Zhou, Tiangui Qi, Zhihong Peng, Guihua Liu, Xiaobin Li
Summary: A novel method for preparing ammonium paratungstate (APT) from ammonium metatungstate (AMT) solutions by adding ammonia was developed and investigated systemically. The experimental results showed that high crystallization efficiency and suitable crystalline morphology can be achieved under specific conditions. This method exhibits advantages over evaporative crystallization including less chemical consumption, minor amounts of discharged wastewater, low production costs, and environmental friendliness.
Article
Polymer Science
Shan Wang, Chun-Yan Tang, Jin Jia, Xiang-Jun Zha, Jun-Hong Liu, Xing Zhao, Kai Ke, Yu Wang, Wei Yang
Summary: We report a method to fabricate high-performance piezoelectric polymer fiber mats by collecting electrospun PVDF fibers using low-temperature electrolytes. The use of liquid electrolytes enables the formation of piezoelectric PVDF crystals with zigzag conformation and the immobilization of aligned dipoles at low temperature. Compared with conventional PVDF fibers, these fiber mats can generate a significantly higher open-circuit voltage and instantaneous output power density, making them suitable for self-powered flexible electronics.
Article
Agronomy
Niyi S. Omidire, Kristofor R. Brye, Leah English, Jennie Popp, Laszlo Kekedy-Nagy, Lauren Greenlee, Trenton L. Roberts, Edward E. Gbur
Summary: This field study suggests that wastewater-recovered struvite materials have the potential to be a sustainable source of phosphorus for corn production in P-deficient silt-loam soil.
Article
Engineering, Chemical
Xin Li, Na Wang, Chang Wang, Yingjie Ma, Xin Huang, Ting Wang, Hongxun Hao
Summary: The study focused on the mechanism and control strategy of solution-mediated polymorphic transformation (SMPT) using 5-nitrofurazone as a model compound. Different forms of 5-nitrofurazone were found to transform in various ways, and the SMPT process was explored using quantum chemical calculation. A regulation strategy for obtaining specific forms of 5-nitrofurazone was proposed based on the findings.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Editorial Material
Materials Science, Multidisciplinary
Hong Peng, Kerstin Forsberg
Article
Engineering, Chemical
Hilal Seda Demirel, Michael Svard, Duygu Uysal, Ozkan Murat Dogan, Bekir Zuhtu Uysal, Kerstin Forsberg
Summary: Lithium-ion batteries are crucial for the electrification of vehicles worldwide, and by combining different metals, cathode materials with varying properties can be obtained. Antisolvent crystallization has been explored as an alternative method for producing high-grade nickel sulphate hexahydrate from lateritic nickel ores in Turkey.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yiqian Ma, Michael Svard, Xiong Xiao, Suchithra Ashoka Sahadevan, James Gardner, Richard T. Olsson, Kerstin Forsberg
Summary: This study investigates the recovery of NiSO4 and CoSO4 hydrates from metal sulfate solutions using eutectic freeze crystallization (EFC). Result shows promising potential of EFC as an alternative method for recovering NiSO4 and CoSO4 hydrates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Wen Xuan, Alexandre Chagnes, Xiong Xiao, Richard T. Olsson, Kerstin Forsberg
Summary: This paper addresses the recovery of metals from NMC111 cathodic materials through leaching followed by antisolvent precipitation, successfully achieving lithium separation and efficient recovery of other metals.
Article
Biochemical Research Methods
Meher G. Sanku, Kerstin Forsberg, Michael Svard
Summary: This study investigated the flexible and reversible preparation of columns for high-performance solid phase extraction chromatography using physisorption of organophosphorus acid extractants. Two extractants were evaluated, and the developed procedure is applicable to other extractants. The liquid-liquid solubility of the extractants in ethanol-water solutions was determined, and the adsorbed extractant was quantified using desorption and elution with ethanol. The impregnation of columns with varying concentration feed solutions and the influence of a subsequent water wash step were systematically evaluated. Equilibrium adsorption isotherms were determined, showing higher adsorption of HEHEHP compared to HDEHP for equal feed compositions. The resulting columns were verified for their ability to separate rare earth elements using nitric acid elution.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Engineering, Environmental
Chunyan Ma, Michael Svard, Kerstin Forsberg
Summary: A sustainable deep eutectic solvent (DES) based on choline chloride and L-(+)-tartaric acid has been systematically studied for leaching LIB cathode material, and antisolvent crystallization has been applied for efficient metal recovery. This work presents a green, effective, and closed-loop strategy for recycling LIB cathode materials using a sustainable DES.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Chemical
Mahmood Alemrajabi, Jonas Ricknell, Sakarias Samak, Raquel Rodriguez Varela, Joaquin Martinez, Fredrik Hedman, Kerstin Forsberg, Ake C. Rasmuson
Summary: This study investigates the use of supported liquid membrane extraction for the recovery and separation of rare-earth elements (REEs). The experiments compare different configurations and conditions to examine the performance of the liquid membrane. The results show that the membrane has higher selectivity towards heavy REEs and different configurations exhibit different transport rates and selectivity. The HFRLM and EPT configurations demonstrate more stable performance and provide feasible options for processing REE liquors.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Edward Michael Peters, Michael Svaerd, Kerstin Forsberg
Summary: The recovery of scandium from waste streams has become a research focus due to the scarcity of scandium-containing ores. Hydrometallurgical techniques have been successfully used to recover scandium salts from these waste streams. The solubility of different ammonium metal fluorides, including scandium, zirconium, iron, aluminum, and titanium, has been studied separately and in a mixed system of all five solid phases. The solubility of these metal fluorides varies, and changes in NH4F concentration and ionic strength can affect their solubility.
Article
Chemistry, Multidisciplinary
Sebastian Hedwig, Bengi Yagmurlu, Edward Michael Peters, Victor Misev, Dirk Hengevoss, Carsten Dittrich, Kerstin Forsberg, Edwin C. Constable, Markus Lenz
Summary: This study developed a tandem nanofiltration-solvent extraction process for scandium recovery from titania acid waste, which was then augmented by antisolvent crystallization. The results showed that the process could recover approximately 13g of scandium (with a purity of 95%) from 1m³ of European acid waste containing 81mg/L of scandium. The production costs were lower than market prices, indicating the competitive potential of this process.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Harikrishnan Parathodiel, Elsayed Mousa, Hesham Ahmed, Mohamed Elsadek, Kerstin Forsberg, Charlotte Andersson
Summary: This study explores the feasibility of using organic binders to produce magnetite iron ore pellets, and compares the effects of different types and dosages of binders and moisture content on the characteristics and properties of the pellets. Organic binders show advantages in certain aspects, but have slightly lower performance in terms of firing compared to traditional binders. Cold-bonded pellets demonstrate a higher reduction rate.
Article
Chemistry, Multidisciplinary
Suchithra Ashoka Sahadevan, Xiong Xiao, Yiqian Ma, Kerstin Forsberg, Richard T. Olsson, James M. Gardner
Summary: A novel sulfur-oleylamine copolymer synthesized through the inverse vulcanization method is reported for the selective recovery of Cu2+ from a complex mixture of transition metals. The copolymer exhibits high selectivity towards Cu2+, with adsorption efficiency of >98% in acidic conditions. This work presents a promising material for the cost-effective and selective recovery of Cu ions from battery waste and industrial effluents.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Environmental
Ahmed F. Abdel-Magied, Radwa M. Ashour, Le Fu, Moataz Dowaidar, Wei Xia, Kerstin Forsberg, Hani Nasser Abdelhamid
Summary: The study synthesized two magnetic metal-organic frameworks and investigated their adsorption capacities for Cd(II) and Pb(II). The adsorption efficiency is strongly dependent on the pH of the solution, and the process follows a pseudo-second-order model and fits the Langmuir isotherm model.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
B. W. Hoogendoorn, M. Parra, A. J. Capezza, Y. Li, K. Forsberg, X. Xiao, R. T. Olsson
Summary: Cellulose nanofibers (CNFs) have been found to be effective in recycling zinc ion batteries by converting electrodeposits into easily detachable dendritic deposits. CNFs can strongly interact with metal ions, restricting their mobility and controlling the morphology of zinc deposition.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Edward Michael Peters, Michael Svard, Kerstin Forsberg
Summary: This study focuses on the recovery of scandium from waste streams through antisolvent crystallization using ethanol. The research found that reducing the ethanol concentration and controlling the rate of antisolvent addition can increase crystal sizes, although broader crystal size distributions were obtained. Morphological changes were observed when a one-pot addition of 60% or 70% v/v ethanol was used, but not observed when dilute antisolvents were added at a controlled low rate.
Proceedings Paper
Metallurgy & Metallurgical Engineering
Armida Torreggiani, Alberto Zanelli, Alessandra Degli Esposti, Eleonora Polo, Paolo Dambruoso, Renata Lapinska-Viola, Kerstin Forsberg, Emilia Benvenuti
Summary: The European project RM@Schools aims to increase young people's understanding of the importance of raw materials in modern society through various educational approaches. By fostering students' interest in science and technology, circular economy, and raw material-related topics, the project guides them to become Young RM Ambassadors and develop 21st century learning skills such as creativity, critical thinking, responsibility awareness, and teamwork. Through a strategic partnership among research, education, and business sectors, RM@Schools creates learning pathways that lead students to communicate their ideas and create products outside the classroom.
RARE METAL TECHNOLOGY 2021
(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)
