Article
Metallurgy & Metallurgical Engineering
Qing Shu, Chun-fa Liao, Wen-qiang Zou, Bao-quan Xu, Yu-hui Tan
Summary: The study found that spirulina powder can efficiently recover ytterbium(III) from wastewater solution. The adsorption process follows the Langmuir model, with an adsorption capacity of 72.46 mg/g, and the adsorption rate is controlled by chemical adsorption.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Chemistry, Applied
Wenjuan Cao, Kun Huang, Xiaoqin Wang, Huizhou Liu
Summary: The study conducted kinetic separation of rare earth ions La(III), Gd(III), Ho(III) and Lu(III) using liquid-column elution. The extraction kinetics of these ions by HEHEHP diluted in heptane were investigated. Experimental results suggest that the extraction rate is diffusion-controlled.
JOURNAL OF RARE EARTHS
(2021)
Article
Materials Science, Multidisciplinary
Jingui He, Yong Li, Wenju Tao, Guozhen Dong
Summary: The reduction stripping kinetics of Ce4+ by HEH/EHP were studied using a constant interfacial area cell with laminar flow. The effects of various factors on the stripping rate were investigated, and the control mode and steps of the process were determined. The kinetic equation of stripping and the apparent activation energy were derived, and the mechanism of the process was discussed.
Article
Chemistry, Inorganic & Nuclear
Goretti Castro, Gaoji Wang, Tanja Gambino, David Esteban-Gomez, Laura Valencia, Goran Angelovski, Carlos Platas-Iglesias, Paulo Perez-Lourido
Summary: The coordination properties of macrocyclic lanthanide complexes were investigated, revealing different coordination numbers for large and small Ln(3+) ions. The Tb3+ complex displayed D-2 symmetry and a highly rhombic magnetic susceptibility tensor in aqueous solution. The Pr3+ and Tb3+ complexes showed significant paraCEST effects in solution, as demonstrated by Z-spectra recorded at different temperatures and studies on tube phantoms at 22 degrees C.
INORGANIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Na Sui, Shukai Miao, Kaihui Cui, Fancheng Meng, Kun Huang
Summary: A new strategy was developed to enhance the separation of praseodymium (Pr) and neodymium (Nd) through interfacial push and pull complexation induced by a kinetic effect. The specific addition order of diethylenetriaminepentaacetic acid (DTPA) was found to have a significant influence on the separation behaviors of Pr/Nd. Molecular dynamics simulations showed that this interfacial complexation effect led to differences in molecule arrangements and diffusion mass transfer rates, thereby enhancing the separation of Pr/Nd. This research provides an efficient strategy for the purification of metals that are difficult to separate.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Igor Lomovskiy, Aleksey Kiryanov, Tatiana Skripkina
Summary: Research on extraction kinetics is an important factor in technological processes. This paper analyzes the influence of reverse sorption on the release of substances from the matrix. By evaluating the sorption capacity and using appropriate temperature and kinetic models, the optimal parameters of the chemical process can be determined.
Article
Chemistry, Multidisciplinary
Diana M. Arvelo, Manuel R. Uhlig, Jeffrey Comer, Ricardo Garcia
Summary: This study investigated the evolution of the graphite-water interface using 3D AFM and found the presence of short-lived hydration layers followed by stable molecular layers. Molecular dynamics calculations supported the experimental observations.
Article
Materials Science, Ceramics
Sheng-Jiang Huang, Le-Zhong Li, Xing Zhang, Xiao-Hui Wu, Jian Tang, Mu Lan, Wen-Ning Ren, Xin Chang
Summary: This paper explores the use of ytterbium nitrate to enhance the dielectric and magnetic properties of NiZnCo ferrite ceramics. The study shows that the addition of ytterbium ions increases the lattice constant, porosity, theoretical X-ray density, and bulk density of the ferrite, while decreasing the dielectric constant and losses. It also improves the DC resistance and reduces the eddy current loss. Furthermore, the addition of ytterbium ions lowers the initial permeability and saturation magnetization, but increases the magnetic quality factor, and shifts the cut-off frequency to a higher range.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Thomas Walter, Mohammad Zareghomsheh, Golta Khatibi, Vladimir N. Popok, Peter K. Kristensen, Ievgen Boturchuk, Sabine Schwarz
Summary: Wide bandgap semiconductors like group III-nitrides and SiC are important for developing smaller, more reliable, and efficient power electronics. This study focused on investigating the adhesion properties of GaN/AlN layers grown on Si substrates, specifically looking at the impact of AlN buffer layers on delamination response. Methods like cross-sectional nanoindentation and four-point bending were used to determine interfacial adhesion strength and analytical models were applied to calculate interfacial fracture energy. Detailed electron microscopy investigations were conducted to analyze microstructural details of interfaces pre and post delamination.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Qingqing Wen, Thayalan Rajeshkumar, Laurent Maron, Xuebing Leng, Yaofeng Chen
Summary: The first rare-earth metal complex bearing both hydrido- and imido-ligands, a hydrido- and imido-bridged dinuclear ytterbium(III) complex, was successfully synthesized via an unprecedented redox reaction. DFT calculation revealed that the N-2 release from azido compound in the presence of ytterbium(II) is kinetically facile due to cooperative effects. The reactivity investigation of the complex demonstrated redox, addition, and sigma-bond metathesis reactivities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Ceramics
Sanat Chandra Maiti, Quan Li, Fei Peng, Rajendra Bordia
Summary: The effect of temperature and heating rate on the densification of ytterbia, with and without titania doping, was investigated in this study. It was found that titania doping enhances the densification behavior of ytterbia up to a certain level, and improves the crystal structure. The increased densification rate is attributed to the formation of cation vacancy and lattice distortion, while titania doping increases the activation energy for densification.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Dane M. Sterbentz, Philip C. Myint, Jean-Pierre Delplanque, Yue Hao, Justin L. Brown, Brian S. Stoltzfus, Jonathan L. Belof
Summary: This article presents a model for the high-pressure conditions of the solid-liquid interfacial free energy by considering the enthalpies of interactions between pairs of atoms or molecules and the contribution of interface roughness. The model is applicable to diverse materials and has been validated with models for water and gallium. The application of this model in simulations of dynamic compression experiments shows good agreement with observed kinetics.
Article
Chemistry, Physical
Akihisa Miyagawa, Yuka Kusano, Ryogo Nakagawa, Shigenori Nagatomo, Yuichi Sano, Kiyoharu Nakatani
Summary: In this study, the mechanism of Eu(III) extraction using a tributyl phosphate (TBP) microdroplet was investigated using fluorescence microspectroscopy. The interfacial reaction between TBP and an NaNO3 aqueous solution was found to be the rate-determining step, and the involvement of nitrate ions and TBP molecules in the extraction mechanism was quantitatively revealed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Organic
Simon Wheeler, Colum Breen, Yong Li, Sarah H. Hewitt, Erin Robertson, Edwin A. Yates, Igor L. Barsukov, David G. Fernig, Stephen J. Butler
Summary: Sulfotransferases are a class of enzymes that are poorly understood due to the lack of convenient screening tools. A europium(iii)-based probe has been developed for assessing sulfotransferase activity, allowing for the first direct real-time assay of heparan sulfate sulfotransferase. The probe shows selective response towards PAP and can be used for simple inhibitor screening.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Analytical
Bo Liang, Xiang -Yu Xiao, Zong-Yin Song, Yong-Yu Li, Xin Cai, Rui-Ze Xia, Shi-Hua Chen, Meng Yang, Pei-Hua Li, Chu-Hong Lin, Xing-Jiu Huang
Summary: The mutual interference in the sensing detection of heavy metal ions is serious and complex. A promising approach of partial peak area analysis was proposed to study the mutual interference, and its applicability was verified on Cu2+/As(III) interference. This work provides a meaningful guidance for accurate detection of heavy metal ions in water environment.
ANALYTICA CHIMICA ACTA
(2023)
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)