Article
Chemistry, Physical
Syane A. Satyawirawan, Robert W. Cattrall, Spas D. Kolev, Ines G. S. Almeida
Summary: This study investigated the solvent extraction of Co(II) from aqueous solutions using the ionic liquids [P66614][C272] and [P66614][SCN]. The results showed that the cation of the ionic liquids participated in the formation of ion-pairs in the organic phase, maintaining electroneutrality. The Co(II) coordination sphere geometry was tetrahedral, and the stoichiometric mole ratios between the ionic liquids and Co(II) were determined. The extraction of Co(II) was enhanced when the aqueous phase contained an anion with high lipophilicity.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Yu Deng, Yigang Ding, Zhong Huang, Ying Yu, Jun He, Yi Zhang
Summary: Two novel carboxylic acid based ionic liquids were synthesized and studied for the extraction of yttrium (Y(III)) and mixed rare earth elements (REEs). One IL showed higher extraction efficiency for Y(III) while the other demonstrated better selective separation behavior for mixed REEs, avoiding saponification procedures and resulting wastewater.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiayu Liang, Qingle Zeng
Summary: In this study, three novel morpholine carboxylic acid ionic liquids were designed and synthesized for the extraction of Sm(III). The effects of different factors on the extraction performance were tested, and [(CH2)7COOHmor][NTf2] was found to have the optimal extraction capacity. The extraction efficiency of Sm increased with the increase of pH, reaching >99.9% when the pH was 1.8. The loaded Sm(III) in organic phase could be easily stripped with HNO3, and the ionic liquid remained stable after 5 cycles. Under the optimized extraction conditions, Sm2O3 with 83.9% yield was obtained through large-scale recovery applications of the simulated waste liquid.
Article
Chemistry, Inorganic & Nuclear
Yiwei Huang, Xiaomin Li, Fei Wu, Suliang Yang, Fangfei Dong, Xupeng Zhi, Xinlong Chen, Guoxin Tian, Yinglin Shen
Summary: In this study, a new Tc separation material with high selectivity and good extraction performance in highly acidic solutions was developed by constructing a tailor-made binding site.
INORGANIC CHEMISTRY
(2022)
Article
Engineering, Chemical
Kun Wang, Guoquan Zhang, Linye Li, Yuzhang Li, Xiangxin Liao, Pu Cheng, Mingzhi Luo
Summary: With the rapid development of the electronics industry, the consumption of lithium is increasing, and the need for efficient and sustainable extraction methods from solutions is necessary. This study presents an effective strategy using an imidazole-based ionic liquid to extract lithium from aqueous solutions, achieving high extraction rates and perfect separation from nickel. Analysis of the extraction process provides insights into possible extraction mechanisms. Additionally, the study demonstrates the preparation of battery-grade lithium carbonate from the solution, further highlighting the significance of this research.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Xiaohua Jing, Zhumei Sun, Dandan Zhao, Xiaoning Tang, Wenjing Lv, Yunfeng Shi
Summary: In this study, novel ionic liquids were synthesized and their single-stage extraction performance and multi-stage cross flow extraction performance for metal ion separation were investigated. Among them, [C4H9NH3][Cyanex 272] showed good selective extraction and separation, and can be used for the recovery of Mn2+, Co2+, and Ni2+ from spent ternary lithium batteries.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Geochemistry & Geophysics
Felipe Olea, Guillermo Duran, Georgina Diaz, Eduardo Villarroel, Claudio Araya-Lopez, Rene Cabezas, Gaston Merlet, Julio Romero, Esteban Quijada-Maldonado
Summary: In this study, the theoretical design of ionic liquids (ILs) for predicting selective extraction of lithium from brines has been conducted. Theoretical results were validated using experimental extraction percentages. Based on the model, an IL was proposed to improve selectivity for lithium extraction over sodium.
Article
Chemistry, Applied
Yi Zhang, Weidong Guo, Donghao Liu, Jie Xu
Summary: The novel ionic liquids synthesized in this study show excellent extractability and selectivity for Nd(III) and Sc(III), as well as outstanding separation properties between rare-earth and first row transition-metal ions. The extraction mechanism indicates that the rare-earth complex extracted in the ionic liquid phase is structurally similar to those obtained with neutral extractants, providing a new approach for the future recycling of rare-earth metals.
JOURNAL OF RARE EARTHS
(2021)
Article
Green & Sustainable Science & Technology
Wenjing Ma, Shanshan Dai, Xiaojiang Li, Hongsheng Lu
Summary: This study presents a sustainable method for separating oil from oily waste using CO2-switchable ionic liquids, which simplifies the process, reduces costs, and improves recovery rates.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biotechnology & Applied Microbiology
Fiona Mary Antony, Kailas L. Wasewar
Summary: In this study, the equilibrium extraction efficiency of PCA using two imidazolium ILs was investigated. The results showed significantly higher distribution coefficients and extraction efficiencies compared to traditional extractants, providing valuable information for the development of an extraction purification system for PCA separation and recovery.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Fei Cao, Wei Wang, De-zhou Wei, Wen-gang Liu
Summary: Functionalized ionic liquids were employed as extractants for the separation of tungsten and molybdenum from a sulfate solution for the first time. The [A336][Cyanex272] system showed selective extraction of tungsten over molybdenum at an initial pH value of 5.5 and achieved high separation factors. Stripping experiments demonstrated efficient recovery of tungsten and molybdenum using a sodium hydroxide solution. The results suggest the feasibility and effectiveness of using [A336][Cyanex272] for the separation of tungsten and molybdenum.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Chemistry, Physical
Fushan Ci, Tao Zhang, Lianzheng Zhang
Summary: This study successfully synthesized and characterized non-aromatic ring carboxylic acid ionic liquids (CNILs) with high extraction performance for indole. The study found that multifunctional sites and non-covalent interactions in the CNILs were the primary factors driving the indole extraction. Additionally, the recovered CNILs showed excellent reusability. These findings are of great significance for the development of appropriate and sustainable ionic liquid separation agents and the chemical industry's efforts in developing indole separation technologies.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Junyuan Hua, Jintao He, Hongchang Pei, Xiaohua Ma, S. Ranil Wickramasinghe, Jianxin Li
Summary: The worldwide demand for lithium is growing rapidly. Extracting lithium from saltlake brines with low concentration and high Mg/Li ratio remains challenging. In this study, a supported ionic liquid membrane contactor was developed for high-efficiency lithium recovery. The contactor showed excellent Li+ mass transfer performance, providing an effective solution for selective separation of Mg/Li and utilization of lithium resources in salt lake water.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Edgar Suarez Garcia, Carlota F. Miranda, M. Teresa Cesario, Rene H. Wijffels, Corjan van den Berg, Michel H. M. Eppink
Summary: A novel extraction and fractionation concept using Ionic Liquids (ILs) was proposed to extract and recover proteins and carbohydrates from macroalgae. The process involved IL-assisted mechanical shear for initial extraction and two-phase partitioning or ultrafiltration for fractionation. The selective extraction of proteins and the preservation of their native structure were demonstrated. The potential application of this approach in the biorefinery of macroalgae was highlighted.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Chemical
Jinglu Han, Guolong Wu, Yanling Li, Songsong Li, Wuping Liao
Summary: In order to overcome the drawbacks of the commonly used naphthenic acid (NA) system for yttrium (Y) separation, a novel extractant, 2-(bis((2-ethylhexyl)oxy)phosphoryl)-2-hydroxy-acetic acid (HPOAc, HL), was designed and synthesized by combining the functional groups of commercial organophosphorus extractants, carboxylic acids, and alcohol phase modifiers. HPOAc showed higher extraction ability for REEs(III) and better performance in the separation of Ln(III) and Y(III) compared to NA and CA-12. A cascade extraction process using HPOAc as the extractant was developed, achieving a Y product with a purity of 99.31 wt% through 20 stages of extraction and 4 stages of scrubbing.
SEPARATION AND PURIFICATION TECHNOLOGY
(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)