Article
Chemistry, Multidisciplinary
Xueyuan Liu, Huiqing Wu, Peiyi Wu
Summary: This study developed a hierarchical membrane using isocyanate as a multifunctional additive. The membrane showed superior water permeance, protein retention, and antifouling ability, thanks to the combination of phase separation and chemical reaction for membrane optimization.
Article
Multidisciplinary Sciences
Nadeem Baig, Zeeshan Arshad, Shaikh A. Ali
Summary: The modified PVDF membrane can efficiently separate oil and water from nano-emulsions, making it a promising solution for various applications.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Chemical
Ngoc Lieu Le, Phuoc H. H. Duong, Bruno A. Pulido, Suzana P. Nunes
Summary: The new zwitterionic triamine monomer significantly improves water permeance of thin-film composite membranes without affecting dye rejection, while also enhancing fouling resistance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Tauqir A. Sherazi, Shumaila Azam, Sajid Hussain Shah, Shabab Hussain, Syed Ali Raza Naqvi, Shenghai Li
Summary: In this study, fouling resistant zwitterionic analog ultrafiltration composite membranes were successfully fabricated with high water flux and rejection rate, exhibiting minimal irreversible fouling and relatively high flux recovery ratio, making them potential candidates for antifouling membranes. Additionally, the developed method provides a facile route for preparing membranes with zwitterionic features and excellent antifouling properties.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Juanjuan Wen, Chao Yang, Xianfu Chen, Minghui Qiu, Yiqun Fan
Summary: This study prepared tight ZrO2 ultrafiltration membranes with narrow pore size distributions using a nanocrystalline precursor, effectively reducing pollution and controlling permeance by adjusting the sintering temperature. Results showed high BSA molecule retention and stable permeance, indicating potential for protein separation applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Haozhen Dou, Mi Xu, Leixin Yang, Baoyu Wang, Aiping Yu, Luhong Zhang, Zhongwei Chen, Zhongyi Jiang
Summary: Zwitterionic deep eutectic solvent membranes (ZDESMs) are novel membranes used for ethylene/ethane separation. These membranes possess structural nano-heterogeneity with discrete zwitterionic nanodomains and interconnected carrier channels, providing flexibility in regulating carrier distribution and enhancing carrier activity and stability. ZDESMs exhibit high ethylene permeability, ethylene/ethane selectivity, and long-term stability, outperforming most state-of-the-art separation membranes. This research expands the membrane family and offers valuable guidance for developing advanced membranes in energy-intensive gas separations.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Polymer Science
Gansheng Liu, Ran Tao, Mengyang Hu, Xiaowei Liu, Christine Matindi, Sania Kadanyo, Rui Chen, Liuyong Mao, Kuanjun Fang, Jianxin Li
Summary: By constructing a zwitterionic copolymer layer, membrane potential can be controlled to enhance the selective separation of dyes/salts. Under optimized membrane fabrication conditions, the membrane exhibits high rejection rates and separation performance.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Zhihao Jin, Yajing Shen, Xianfu Chen, Minghui Qiu, Yiqun Fan
Summary: The introduction of Ce effectively inhibited the phase transformation of TiO2 and prevented cracks, resulting in excellent performance and anti-fouling properties for the Ce-doped TiO2 membrane in protein separation.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Wancen Xie, Alberto Tiraferri, Xuanyu Ji, Chen Chen, Yuhua Bai, John C. Crittenden, Baicang Liu
Summary: The study utilized a green solvent and environmentally friendly reaction method to fabricate PVC UF membranes with excellent fouling resistance, achieving good membrane performance in a short grafting time, providing a new approach to reduce environmental impacts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Samuel J. Lounder, Ayse Asatekin
Summary: Research shows that water filtration membranes with cross-linked zwitterionic copolymer membranes exhibit high ion selectivity, controlling salt partitioning and diffusivity for efficient salt separation. These membranes also achieve high fluoride retention and high chloride passage in saline mixtures.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Environmental Sciences
Thanigaivelan Arumugham, Mariam Ouda, Rambabu Krishnamoorthy, Abdul Hai, Nirmala Gnanasundaram, Shadi W. Hasan, Fawzi Banat
Summary: Bimetallic oxide nanoparticles, particularly Fe2O3-Mn2O3, were synthesized and used as nanomodifiers for PES ultrafiltration membranes, significantly enhancing water contact angle, surface roughness, porosity, and pure water flux for the membrane containing 0.25 wt% nanoparticles. The modified PES membranes exhibited improved antifouling ability and higher flux recovery ratios in protein-based filtration tests.
ENVIRONMENTAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Samuel J. Lounder, Ayse Asatekin
Summary: There is an urgent need for new polymer chemistries to develop nanofiltration membranes with improved fouling and chlorine resistance. This study introduces charged zwitterionic amphiphilic copolymers (CZACs), which self-assemble to form membranes with anionic nanopores. These CZAC membranes exhibit enhanced salt rejection and exceptional fouling resistance, addressing key performance limitations of current nanofiltration membranes.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Henrik Siegel, Alessio J. Sprockel, Matthew S. Schwenger, Jesse M. Steenhoff, Iske Achterhuis, Wiebe M. de Vos, Martin F. Haase
Summary: Ultrafiltration membranes are crucial for producing freshwater in a water-scarce world. A recent method called solvent transfer induced phase separation (STrIPS) has been used to create porous membranes. This study investigates the dynamics of hollow fiber structure evolution during STrIPS and demonstrates the separation performance of the resulting membrane in ultrafiltration.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jincheng Din, Huiqing Wu, Peiyi Wu
Summary: A facile strategy using one-step water-induced phase separation was proposed for the preparation of composite membranes with polyelectrolytes. By altering the concentration, molecular weight, and type of polyelectrolytes, ultrafiltration membranes with hierarchical structures were obtained, exhibiting high water flux and rejection properties.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Muhamad Zulhilmi Zailani, Ahmad Fauzi Ismail, Pei Sean Goh, Siti Hamimah Sheikh Abdul Kadir, Mohd Hafiz Dzarfan Othman, Hasrinah Hasbullah, Mohd Sohaimi Abdullah, Be Cheer Ng, Fatmawati Kamal, Ruslinda Mustafar
Summary: In this study, immobilizing chitosan nanoparticles on polysulfone membranes improved transport properties and uremic toxins removal capabilities. Spinning conditions were found to play a critical role in dictating the properties of the nanocomposite hollow fiber membrane.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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)