Article
Engineering, Chemical
Liufu Zhang, Ruolin Zhang, Miaozhou Ji, Yang Lu, Yuzhang Zhu, Jian Jin
Summary: The PDIP process for preparing PA nanofiltration membranes shows superior rejection rates and uniform pore size compared to traditional methods, indicating a potential shift in the manufacturing mode for PA thin film composite membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Hongyan Yu, Li Xu, Yunpeng Luo, Mengyao Guo, Xuefeng Yan, Xiaohui Jiang, Liangmin Yu
Summary: A novel thin film composite (TFC) nanofiltration (NF) membrane was prepared by introducing the capsaicin derivative AMTHBA into polyamide (PA) layer through bidirectional interfacial polymerization. The optimized NF membrane exhibited ultrahigh permeance and steady efficiency for rejection of Na2SO4, and also exhibited excellent antifouling performance, showing broad application prospects in the field of water treatment.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Ping Hu, Bingbing Yuan, Q. Jason Niu, Kuo Chen, Zewen Xu, Bizhuo Tian, Xiaozhuan Zhang
Summary: In this study, a novel dual-functional acyl chloride monomer was designed and used as an organic phase additive to regulate the surface charge and pore structure of polyamide nanofiltration membranes. The results showed that the optimized membrane exhibited significantly improved rejections of Ca2+/Mg2+ and selectivity for mono-/divalent cations, as well as a preferable permeate flux. This membrane has great potential for water softening and lithium recovery from brine.
Article
Chemistry, Physical
Chi Jiang, Zhenyu Liu, Lin Jiang, Zhaohui Fei, Yingfei Hou
Summary: Defect-free ultrathin polyamide nanofilms with superior separation performance can be prepared by interfacial polymerization at free oil-water interface. The introduction of specific monomers and a new assembly design enhance the mechanical strength and selectivity of the membranes.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Le Shi, Sihua Liu, Wei-Song Hung, Wenxiong Shi, Xiaolong Lu, Chunrui Wu
Summary: To improve the selectivity of nanofiltration membranes for multi/monovalent anions, a strategy to moderately amplify the pore size while maintaining chargeability of the membranes was proposed. Four diamine monomers with increased reaction site distance were studied and the effect on the structure and performance of the membranes was investigated. The results showed that membranes prepared with moderately increased reaction site distance displayed larger pore size, improving the separation ability of SO42-/Cl-.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Pengfei Li, Hongling Lan, Kuo Chen, Xiupeng Ma, Bingxin Wei, Ming Wang, Peng Li, Yingfei Hou, Q. Jason Niu
Summary: The novel positively charged aliphatic polyamide NF membrane (PEI-BTC) developed in this study shows superior physicochemical properties, higher rejection rate for MgCl2, and excellent heavy metal removal efficiency, indicating its potential for industrial applications in water softening and heavy metal removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Titik Istirokhatun, Yuqing Lin, Ken Kinooka, Qin Shen, Pengfei Zhang, Yuandong Jia, Atsushi Matsuoka, Kazuo Kumagai, Tomohisa Yoshioka, Hideto Matsuyama
Summary: In this study, a novel class of nanofiltration membranes was developed to efficiently remove harmful micropollutants while preserving valuable nutrients. Chemical functionalization of the membranes improved their physicochemical properties and structures, allowing for better performance in wastewater treatment.
Article
Materials Science, Multidisciplinary
Kayode Hassan Lasisi, Kaisong Zhang
Summary: A polyamine-based TFC NF membrane was synthesized by retarding the IP process with pyromellitic acid. The PMA-adjusted membrane exhibited high water permeability, good hydrophilicity, pressure resistance, long-term filtration stability, and impressive fouling resistance. This study provides a more feasible way of designing polyamine-based NF membranes for water reuse and nitric acid-generating wastewater treatment.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Chemical
Zhiqiang Wang, Yawei Gao, Jinsong Zhang, Zanguo Peng, Xiao-mao Wang, Shuming Liu, Xia Huang
Summary: Surface modification via secondary interfacial polymerization is a promising technology for enhancing nanofiltration membrane performance. The introduction of sulfonic groups into the active layer of the membranes using sulfuryl chloride improves the membrane's surface charge density, pore size distribution, hydrophilicity, and rejection selectivity. The SC-modified membranes show potential for advanced treatment of drinking water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zahra Nadizadeh, Hossein Mahdavi
Summary: In this research, a method was developed to stabilize RAFT initiators on the surface of polyamide NF membranes, followed by successful grafting of a zwitterionic polymer pMEDSAH to reduce irreversible protein adsorption. The prepared grafting membranes showed promising potential for practical applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Jingguo She, Haifu Gao, Ziping Song, Le Shi, Sihua Liu, Jiahui Li, Xiaolong Lu, Chunrui Wu
Summary: This paper reports a nanofiltration membrane (NFM) with improved uniformity and dually charged separation layer, formed on a properly modified poly(vinyl chloride) (PVC) substrate by N-methylglucamine (NMG) molecules. The effect of NMG grafting on the structure and performance of PVC UF membranes and NFMs was studied. The results showed that the appropriate grafting of NMG molecules significantly improved the hydrophilicity of PVC UF membrane and enabled the formation of uniform and defect-free dually charged polyamide separation layer.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Titik Istirokhatun, Yuqing Lin, Qin Shen, Kecheng Guan, Shengyao Wang, Hideto Matsuyama
Summary: In this study, Ag-based compound nanorods were synthesized and incorporated into a PA active layer through interfacial polymerization. The membrane achieved a molecular sieving architecture and tunable surface function by controlling the release of zero dimensional Ag nanoparticles via the decomposition of pH-responsive compounds. The resulting membrane exhibited a wrinkled surface microstructure, loose internal architecture, and superior antifouling/antibiofouling properties.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Daowei Xia, Mengxiao Zhang, Congcong Tong, Zhanghui Wang, Hongzhi Liu, Liping Zhu
Summary: The developed TFN membrane in this study, incorporating zwitterionic nanocellulose, demonstrated superior permselectivity and antifouling properties, showing increased water permeance and enhanced divalent salt rejection. It exhibited highly efficient antibiotic desalination and improved antifouling capability and cleaning recovery ability, with promising potentials in separation fields.
Article
Engineering, Chemical
Yingying Liu, Xinyu Dong, Ming Wang, Shujie Guo, Haifeng Zhang, Zhi Wang
Summary: Nanofiltration (NF) membrane technology is a critical method for resolving fresh water resources shortage and water pollution. The modified 1-MI NF membrane has excellent water permeance and mono/multivalent salts selectivity, making it suitable for the separation of monovalent/divalent anionic salts.
Article
Engineering, Chemical
Abdul Waheed, Salman Abduljawad, Umair Baig
Summary: A new PA@PS/PET TFC-NF membrane was successfully prepared by crosslinking a multifunctional amine and cyanuric chloride on a self-fabricated PS/PET membrane support. The membrane exhibited remarkable solvent flux and solute rejection in various solvents, and demonstrated good stability under the applied operating conditions.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(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)