Article
Chemistry, Multidisciplinary
Biaohua Chen, Jinyi Li, Gangqiang Yu, Ruinian Xu, Chengna Dai
Summary: The pi-electron donor-based deep eutectic solvents (DESs) are a promising green and sustainable toluene absorbent with excellent absorption performance and lower environmental impacts during production and usage.
Article
Engineering, Chemical
Ke Li, Kai Zong, Ziyue Zhou, Dongshun Deng
Summary: This study conducted new lithium deep eutectic solvents (DESs) by pairing simple lithium salt with various hydrogen bond donors, with LiCl/EG (1:3) DES showing exceptional performance in NH3 capture. The results provide useful insights for designing metallic DESs for NH3 separation applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Energy & Fuels
Zhongqi Ren, Xiaojia Wu, Hui Yu, Fan Zhang, Shichao Tian, Zhiyong Zhou
Summary: The selective extraction of toluene from toluene/n-heptane mixtures using deep eutectic solvents (DESs) was investigated. The optimal extraction agent was found to be EmimCl:1,3-dimethylurea (2:1). The feasibility of using DESs for toluene separation was confirmed, and the effects of various factors on toluene selectivity were determined. The obtained liquid-liquid equilibrium data were fitted to a non-random two-liquid model.
Review
Biochemistry & Molecular Biology
Iwona Cichowska-Kopczynska, Bartosz Nowosielski, Dorota Warminska
Summary: Nowadays, researchers are striving to find a solution to the problem of global warming, with a focus on reducing carbon dioxide emissions. The use of alkanolamines for carbon dioxide capture is problematic due to its corrosive nature, volatility, and high energy demand. Deep eutectic solvents (DESs) have emerged as a potential alternative, capable of physically and chemically absorbing carbon dioxide. Different strategies, such as the addition of water or co-solvents, have been proposed to enhance CO2 absorption using DESs. This review presents an overview of DESs, their impact on CO2 absorption, and practical considerations for their use in CO2 separation.
Article
Engineering, Chemical
Dongwook Lee, Won Yong Choi, Kyumin Jang, Jinwon Park, Yunsung Yoo
Summary: In this study, deep eutectic solvents (DESs) functionalized to absorb SO2 at low concentrations were developed as alternatives for flue gas desulfurization (FGD). The prepared DESs showed enhanced thermal stability and multi-site absorption capacity, resulting in remarkable SO2 absorption performance. The absorption mechanism was confirmed through H-1 nuclear magnetic resonance and Fourier Transform Infrared spectroscopy. This study is expected to significantly contribute to alternative technology research on SO2 separation due to the exceptional performance of the proposed absorbents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Pingping Shao, Ruoya Wang, Tianxiang Zhao, Chun Zhu
Summary: This study reports an efficient technique for capturing ammonia using protic amino-2-propanol hydrochloride-based deep eutectic solvents, which exhibit remarkable NH3 uptake and good recyclability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Guangzhi Xu, Mingzhen Shi, Ping Zhang, Zhuoheng Tu, Xingbang Hu, Xiaomin Zhang, Youting Wu
Summary: This study developed a new deep eutectic solvent (DES) for the absorption separation of ethylene and ethane. Tunable ethylene/ethane selectivities were achieved by altering the composition ratio of the DESs. The findings in this study provide utility guidance for designing absorbents targeting ethylene/ethane separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dongshun Deng, Xiaoxia Deng, Xiuzhi Duan, Lei Gong
Summary: Deep eutectic solvents (DES) are considered as the second generation ionic liquids with potential applications in gas capture and separation, due to their negligible vapor pressure and abundant formation variation. In this study, DESs with low viscosity were constructed using protic guanidine isothiocyanate and acetamide. The gas solubility was enhanced with increasing molar ratio, pressure, and decreasing temperature, while the solubilities of NH3 and CO2 were correlated by Henry's law. The DESs showed efficient NH3 absorption and selective separation performance.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Yi Pan, Yu Liu, Xiaomin Zhang, Mingzhen Shi, Zhuoheng Tu, Xingbang Hu, Youting Wu
Summary: This study proposes a new strategy to design deep eutectic solvents (DESs) with multiple-active-sites for efficient absorption of hydrogen chloride (HCl) and high HCl capacity. These DESs show promise for industrial application in HCl separation and storage.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Mingli Mu, Xinfeng Zhang, Gangqiang Yu, Ruinian Xu, Ning Liu, Ning Wang, Biaohua Chen, Chengna Dai
Summary: The efficient treatment of dichloromethane (DCM) is important for environmental protection and human health. This study proposes and investigates the strategy of capturing DCM using deep eutectic solvents (DESs) with different hydrogen bond acceptors (HBAs) and hydrogen bond donors (HBDs). The results show that tetrabutylphosphonium chloride: levulinic acid ([P-4444][Cl]-LEV) has the highest DCM absorption capacity among all DESs studied, and the interaction energy between DES and DCM plays a crucial role in the saturated absorption capacity of DCM.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Ning-Ning Cheng, Zi-Liang Li, Hong-Chao Lan, Wen-Long Xu, Wen-Jing Jiang, Kuan Huang, Hai-Long Peng
Summary: Developing new NH3 separation technology is important for environmental protection in ammonia synthesis. Ethylamine chloride (EaCl) can form deep eutectic solvents (DESs) with resorcinol (Res) and phloroglucinol (Phl), which show high NH3 absorption performance and selective absorption towards N-2 and H-2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yanning Cao, Jiayin Zhang, Yongde Ma, Wenquan Wu, Kuan Huang, Lilong Jiang
Summary: Developing high-efficiency NH3 separation technology is crucial for advancing the NH3 synthesis process. The newly designed deep eutectic solvents show excellent performance in the NH3 separation, with the mechanism of efficient NH3 absorption being the strong interaction between weak-acidic groups of the solvents and NH3.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Review
Chemistry, Analytical
Vasil Andruch, Radoslav Halko, Jozef Tucek, Justyna Plotka-Wasylka
Summary: Atomic absorption spectrometry (AAS) is a widely used technique for metal quantification due to its practicality, easy use, and low cost. Sample pretreatment is commonly employed to improve the metrological characteristics of AAS, particularly the sensitivity and the detection limit. Deep eutectic solvents (DES) are being introduced into the analytical practice as new solvents in consideration of the principles of Green Analytical Chemistry. This article focuses on the potential of DES for the separation of metals and metalloids followed by AAS quantification, with an emphasis on their use in various liquid-liquid microextraction procedures.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Pedro Villarim, Eric Genty, Jaouad Zemmouri, Sophie Fourmentin
Summary: This study evaluates and compares the efficiency of hydrophobic deep eutectic solvents (DESs) and conventional absorbents for the absorption of volatile organic compounds (VOCs) in biogas. The results show the superior performance of DESs in VOC absorption, and also highlight the impact of temperature on the absorption efficiency of conventional absorbents.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Lu Zheng, Xinyue Zhang, Qiuke Li, Yongde Ma, Zhenping Cai, Yanning Cao, Kuan Huang, Lilong Jiang
Summary: A novel kind of non-chloride deep eutectic solvents (DESs) were constructed from dihydroxybenzoic acids (DHBAs) and ethylene glycol (EG) for NH3 separation. The DHBA + EG DESs exhibited impressive NH3 absorption capacities under reduced pressures, reaching 5.64 and 11.69 mol/kg at 0.1 and 1 bar respectively at 298.2 K. After five absorption-desorption cycles, the DHBA + EG DESs preserved excellent NH3 absorption performance.
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)