Article
Chemistry, Applied
Di Sha, Run Zheng, Baolong Wang, Jiuduo Xu, Kai Shi, Xu Yang, Xiangling Ji
Summary: The study focuses on emulsion separation using PVA-PVF composite sponges, highlighting the importance of controlling pore size and wettability. The experimental results show that these composite sponges can efficiently separate various oil-in-water emulsions, with tunable pore structures contributing to high separation efficiency.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Engineering, Chemical
Longzhu Zheng, Hongqiang Li, Xuejun Lai, Wei Huang, Zengyue Lin, Xingrong Zeng
Summary: This study presents a facile method to fabricate a superwettable Janus membrane through asymmetric chemical modification on the surface of nanomaterials, achieving efficient emulsion separation and heavy metal removal, with great potential for wide applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Environmental
Zhangdi Li, Fengxian Qiu, Xuejie Yue, Qiong Tian, Dongya Yang, Tao Zhang
Summary: This study fabricated a cellulose membrane with strong mechanical performance, superoleophobicity, and anti-fouling properties through self-crosslinking method, showing great potential for oil-water separation and application in harsh conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Composites
Jiuyun Cui, Atian Xie, Yin Liu, Changguo Xue, Jianming Pan
Summary: This study introduces a new multi-functional imprinted composite membrane for selective tetracycline and oil-in-water emulsion separation, with superhydrophilicity and underwater superoleophobicity. The membrane shows high separation efficiency and excellent antifouling performance, indicating its potential for wastewater treatment processes containing organic and oil pollutants.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Shuaiyan Ji, Wei Li, Ningning Lv, Xiaoting Chen
Summary: A hybrid hydrogel, prepared by synthesizing a crosslinked network copolymer P(MA-AMPS) and introducing polyvinyl alcohol (PVA) and nano-SiO2, exhibited superhydrophilicity/underwater superoleophobicity when sprayed onto a stainless steel mesh (SSM). The membrane achieved a permeation flux of over 352.94 L…•m � 2 •h-1 and a separation efficiency of over 99.5% for oil-water emulsions under gravity. It also demonstrated excellent anti-fouling performance and stability in complex physicochemical environments due to the combination of stable semi-interpenetrating networks and nanoparticles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Sneha Bhagyaraj, Patrik Sobolciak, Mohammad A. Al-Ghouti, Igor Krupa
Summary: This study successfully synthesized polymer-clay nanocomposite nanofibers using electrospinning technique, and investigated the influence of clay content on their properties, confirming their effective use for oil/water emulsion separation.
Review
Nanoscience & Nanotechnology
Jincui Gu, Lingtong Ji, Peng Xiao, Chang Zhang, Jian Li, Luke Yan, Tao Chen
Summary: This paper reviews the progress of superhydrophilic carbon-based separation membranes in recent years and introduces four construction strategies of the membranes. The design strategies and their disadvantages are comprehensively discussed, and the challenges and prospects of superhydrophilic carbon-based membranes for oily wastewater purification are summarized to encourage more research in this field.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Subin Oh, Junsik Bang, Hyoung-Joon Jin, Hyo Won Kwak
Summary: Currently, the majority of oil-water separation membranes are made of fluorine-based polymers with low surface energy. However, these materials are non-biodegradable and require a large amount of organic and toxic solvents in the manufacturing process. Therefore, there is increasing interest in developing a new eco-friendly oil-water separation membrane that does not cause secondary pollution and exhibits selective wettability characteristics.
ADVANCED FIBER MATERIALS
(2023)
Article
Chemistry, Physical
Jian Xu, Atian Xie, Haotian Sun, Chengcai Li, Changguo Xue, Jiuyun Cui, Jianming Pan
Summary: In this study, a polyvinylidene difluoride composite membrane (PVDF@TA-Fe membrane) with superhydrophilicity was prepared through the repeated spraying of tannic acid (TA) and Fe3+. The TA-Fe(III)-complex network formed on the membrane significantly increased its hydrophilicity, and the membrane showed superhydrophilicity/underwater superoleophobicity. The PVDF@TA-Fe membrane exhibited high separation efficiencies (above 99%) and high fluxes (1189.1-2310.0 L m-2 h-1 bar -1) when used for oil/water emulsion separation. The membrane also demonstrated good antifouling performance and maintained excellent oil/water separation performance after more than 10 cycles. This study is of great importance for the large-scale preparation of superhydrophilic membranes and treatment of oily wastewater.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Fan Huang, Qiang Li, Gengsheng Ji, Jie Tu, Na Ding, Qianqian Qu, Guanhui Liu
Summary: The study demonstrates a cost-effective and efficient method for separating oil/water mixtures using a superhydrophobic PVDF and MCC composite membrane. This membrane shows high separation efficiency for different immiscible oil/water mixtures, with the capability of multiple reuse.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Applied
Jiuyun Cui, Yibo Zhang, Yusong Pan, Jianjun Li, Atian Xie, Changguo Xue, Jianming Pan
Summary: A new anti-pollution PVDF-imprinted composite membrane was synthesized, which can effectively separate antibiotics in oily wastewater and has good anti-fouling performance.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Rachel L. McLaren, Rosenildo C. da Costa, Christian J. Laycock, David J. Morgan, Michael E. A. Warwick, Gareth R. Owen
Summary: A new oleophobic composite material was developed in this study, using plasma-exfoliated multi-layered graphitic (MLG) material as scaffolding to prepare free-standing MLG composite films. The composite consisted of a polyelectrolyte/fluorosurfactant complex derived from polydiallyldimethylammonium chloride (PDDA) and sodium perfluorooctanoate (PFO).
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Nishith A. Chudasama, Veerababu Polisetti, Tapan Kumar Maity, A. V. R. Reddy, Kamalesh Prasad
Summary: The modified agarose composite membrane shows great potential in efficiently separating oil/water emulsions and proteins, making it suitable for industrial applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Multidisciplinary
Qi Zhong, Qing Sun, Bin Xiang, Peng Mu, Jian Li
Summary: Membrane technology greatly enhances the rapid collection of clean water from oily wastewater. A polyethylene glycol (PEG) grafted polyvinylidene fluoride (PVDF) membrane (PPG membrane) with underwater superoleophobic properties was prepared through an environmentally friendly and energy-saving surface grafting method. The PPG membrane exhibited excellent oil-water separation performance, with a separation efficiency of up to 99.6% and a permeation flux of 1130 L m(-2) h(-1). It also showed remarkable mechanical and chemical stabilities, making it suitable for real-world applications in treating oily wastewater.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Chemical
Yang Yang, Qiaoyun Lai, Sakil Mahmud, Jiangyan Lu, Gaosheng Zhang, Zehui Huang, Qihang Wu, Qingyi Zeng, Yongshi Huang, Huifang Lei, Zhu Xiong
Summary: A dense rutile nano-titanium dioxide coating was successfully constructed on nonwoven fabric membrane surfaces using a bio-inspired sol-gel method. The coated membrane exhibited improved water affinity, dynamic water super-wetting, water penetration, and underwater oil repellency. The mineralized nano-TiO2 enhanced the hydration layer and prevented fouling by proteins and emulsified oil droplets. The coated membrane also showed high stability and self-cleaning abilities, making it suitable for crude oil/water emulsion remediation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
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)