Article
Engineering, Chemical
Huayan Fu, Ruiwen Luo, Panpan Liu, Shuning Yu, Qinglei Xing, Peng Bai, Xianghai Guo, Jiafei Lyu
Summary: To improve the selectivity and permeability of alcohol dehydration, hydrophilic zirconium-based NU-906 nanoparticles were incorporated into chitosan to fabricate NU-906/CS mixed matrix membranes. The hybrid membranes showed excellent water affinity and structural stability, leading to enhanced water selectivity and permeability. The optimized membrane with 5.0 wt% NU-906 achieved a high flux of 1086 g/(m(2).h) and an excellent separation factor of 2651 for 90 wt% ethanol dehydration at 76 degrees C. This research expands the range of MOFs available for the fabrication of mixed matrix membranes and provides new options for organic solvent pervaporation dehydration.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Adisti Permatasari Putri Hartoyo, Eti Artiningsih Octaviani, Firda Aulya Syamani, Indria Wahyu Mulsanti, Achmad Solikhin
Summary: Indonesia is committed to restoring degraded peatlands by using paddy plants and paludiculture systems. This study found that chitosan nanocomposites can be used as growth regulators for peatland paddy varieties, promoting their growth and accelerating peatland restoration in tropical areas.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Ilka I. Rose, Michael Kather, Hannah Roth, Hannah Duenkelberg, Lukas Rein, Sascha N. Klimosch, Manfred Schmolz, Matthias Wessling
Summary: This study presents a facile method using chitosan for heparinization of membranes. The resulting membranes show significant charge differences and increased pure water permeance. They also exhibit strong antifouling properties and excellent hemocompatibility.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Decai Yang, Wei Kang, Xueyang Fang, Fei Gao, Chi Cheng, Zongbin Zhao, Shi Chen, Yongming Bao, Chuang Xue
Summary: In this study, a vertically aligned carbon nanotube (CNT) arrays/polydimethylsiloxane (PDMS) membrane with large and expandable area was successfully prepared by a modular splicing method. The addition of CNT arrays with openings at both ends significantly improved the pervaporation performance of the PDMS membrane for ethanol recovery. Furthermore, the expandable area enabled the CNT arrays/PDMS membrane to couple with fed-batch fermentation, increasing the ethanol yield and productivity.
Article
Chemistry, Multidisciplinary
Jin Wang, Na Jiang, Lele Wang, Di Wang, Xiaoshen Chen, Danxi Huang, Lei Wang
Summary: By incorporating 4-aminobenzo-15-crown-5-ether molecules as specific ion binding sites, we have developed two-dimensional Ti3C2Tx ion nanochannels, which have significant influence on ion transport and improved ion recognition.
Article
Chemistry, Physical
Hilda Zahra, Daisuke Sawada, Shogo Kumagai, Yu Ogawa, Leena-Sisko Johansson, Yanling Ge, Chamseddine Guizani, Toshiaki Yoshioka, Michael Hummel
Summary: The study confirms the catalytic role of chitosan in altering the cellulose pyrolysis pathway at moderate temperatures, enhancing dehydration reaction and reducing the formation of specific products, ultimately leading to a higher char yield.
Article
Chemistry, Applied
Yanhui Kong, Wenjing Zhang, Tian He, Xue Yang, Wanghua Bi, Jiwei Li, Wenzhe Yang, Weichao Chen
Summary: In this study, a bilayered asymmetric nanofibrous membrane was prepared, with a hydrophilic chitosan/chitosan oligosaccharide (COS) nanofibrous membrane as the bottom layer and a hydrophobic polycaprolactone (PCL) nanofibrous membrane as the top layer. Results showed that incorporating COS improved the wettability of the CS membrane and increased the antibacterial effects against Escherichia coli and Staphylococcus aureus. The PCL layer prevented water and bacteria adhesion. This wettable membrane has the potential to serve as a new antibacterial dressing for wound healing.
CARBOHYDRATE POLYMERS
(2023)
Article
Engineering, Chemical
Pawel Grzybek, Lukasz Jakubski, Przemyslaw Borys, Slawomir Kolodziej, Czeslaw Slusarczyk, Roman Turczyn, Gabriela Dudek
Summary: Asymmetric chitosan membranes were used to improve the process of ethanol dehydration, and a strong correlation was found between membrane structure, pore size and separation effectiveness. An interesting phenomenon of membrane structure changing during the pervaporation process was observed, leading to a nonlinear time dependence of transport and separation parameters. The best performance for PV separation was achieved by a membrane prepared from a casting solution containing 0.1 ml of absolute ethanol.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Polymer Science
Sixuan Wei, Rujie Peng, Shilong Bian, Wei Han, Biao Xiao, Xianghong Peng
Summary: This study reports a simple method for synthesizing chitosan tartaric sodium (CS-TA-Na) nanostructures and achieving morphology control by adjusting the solvent evaporation temperature. The acquired CS-TA-Na nanostructures exhibited nanorod and nanosheet shapes in aqueous solution, with features of carboxyl and amino functional groups.
Review
Food Science & Technology
Bixiang Wang, Yue Li, Yingchi Lv, Xuan Jiao, Zhitong Wang, Yang He, Liankui Wen
Summary: The quality of dehydrated vegetables is influenced by their ability to restore water during the rehydration process. It is unclear whether this mechanism occurs at the cell-wall or cell-membrane level. This paper reviews the factors affecting the dehydration-rehydration mechanism, focusing on the analysis of the cell wall and cell membrane composition and structure. It also summarizes the detection and analytical techniques that can be used to explore the mechanism at these levels. Understanding the dehydration-rehydration mechanism of vegetables would contribute to the development and improvement of processing methods and inspire new applications.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2023)
Article
Engineering, Chemical
Shun Aoyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: The effects of plasma treatment time on the gas permeation and pervaporation dehydration properties of organosilica membranes were investigated. The study found that increasing plasma modification time resulted in a decrease in pore size, leading to an increased He/N2 permeance ratio. The H2O/EtOH permeance ratio also increased from about 20 to over 1000 as the plasma modification time increased due to changes in pore structure and water adsorption properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Ahmed A. Alshahrani, Mohammed Alsuhybani, Mohammad S. Algamdi, Dewihi Alquppani, Ibrahim Mashhour, Mutairah Shaker Alshammari, Ibrahim Hotan Alsohaimi, Thamer S. Alraddadi
Summary: The study showed that Chitosan and Chitosan-palm membranes have high water permeability and salt rejection rates for nanofiltration applications, and can withstand high pressures, making them suitable for water treatment applications.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2021)
Article
Biodiversity Conservation
Gabriel S. Hofmann, Manoel F. Cardoso, Ruy J. V. Alves, Eliseu J. Weber, Alexandre A. Barbosa, Peter M. de Toledo, Francisco B. Pontual, Leandro de O. Salles, Heinrich Hasenack, Jose L. P. Cordeiro, Francisco E. Aquino, Luiz F. B. de Oliveira
Summary: The study revealed that the Brazilian Cerrado has experienced significant warming trends over the past few decades, with relative humidity decreasing by approximately 15%, potentially leading to a reduction in nocturnal dewfall and impacting the survival of many plants and animals. These climate changes could have a high impact on biodiversity and potentially cause ecosystems to collapse.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Katsiaryna Burts, Tatiana Plisko, Mariia Dmitrenko, Andrey Zolotarev, Anna Kuzminova, Alexandr Bildyukevich, Sergey Ermakov, Anastasia Penkova
Summary: This study developed novel thin film nanocomposite (TFN) membranes based on biopolymer chitosan succinate (ChS) modified with the metal organic framework iron 1,3,5-benzenetricarboxylate (Fe-BTC) to enhance pervaporation dehydration. The TFN membranes showed improved permeation flux compared to the reference TFC ChS membrane. The best transport properties were observed in TFN membranes with 40 wt.% Fe-BTC prepared by dynamic technique and TFN membranes with 5 wt.% Fe-BTC developed by physical adsorption.
Article
Biochemistry & Molecular Biology
Tanzeel Sarwar, Zulfiqar Ali Raza, Muhammad Anwaar Nazeer, Amina Khan
Summary: Membrane technology, specifically gelatin-incorporated porous chitosan membranes, has been developed using the sol-gel approach for potential water desalination applications. The prepared membranes have been characterized and shown promising performance in water purification systems.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(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)