keyword
https://read.qxmd.com/read/38526323/application-of-membrane-separation-technology-in-the-purification-of-pharmaceutical-components
#1
REVIEW
Yun Bi, Jingyi Dong, Yujia Zhou, Manyue Zhang, Xingying Chen, Yuyan Zhang
Traditional Chineae medicine (TCM) is often composed of a variety of natural medicines. Its composition is complex, and many of its components can not be analyzed and identified. The first step in the rational application of TCM is to successfully separate the effective components which is also a great inspiration for the development of new drugs. Among the many separation technologies of TCM, the traditional heating concentration separation technology has high energy consumption and low efficiency. As a new separation technology, membrane separation technology has the characteristics of simple operation, high efficiency, environment-friendly and so on...
March 25, 2024: Preparative Biochemistry & Biotechnology
https://read.qxmd.com/read/38517323/design-of-mixed-matrix-mof-membranes-with-asymmetric-filler-density-and-intrinsic-mof-polymer-compatibility-for-enhanced-molecular-sieving
#2
JOURNAL ARTICLE
Rifan Hardian, Jiangtao Jia, Alejandro Diaz-Marquez, Supriyo Naskar, Dong Fan, Osama Shekhah, Guillaume Maurin, Mohamed Eddaoudi, Gyorgy Szekely
The separation of high-value-added chemicals from organic solvents is of prime importance for many industries but it is associated with a large energy consumption penalty. Suitably, membrane-based nanofiltration offers potential for a more energy-efficient separation than the conventional energy-intensive thermal processes. Conceivably, mixed-matrix membranes (MMMs), encompassing metal-organic frameworks (MOFs) as fillers, are poised to promote selective separation via molecular sieving, synergistically combining polymers flexibility and fine-tuned porosity of MOFs...
March 22, 2024: Advanced Materials
https://read.qxmd.com/read/38509082/extreme-li-mg-selectivity-via-precise-ion-size-differentiation-of-polyamide-membrane
#3
JOURNAL ARTICLE
Quan Peng, Ruoyu Wang, Zilin Zhao, Shihong Lin, Ying Liu, Dianyu Dong, Zheng Wang, Yiman He, Yuzhang Zhu, Jian Jin, Lei Jiang
Achieving high selectivity of Li+ and Mg2+ is of paramount importance for effective lithium extraction from brines, and nanofiltration (NF) membrane plays a critical role in this process. The key to achieving high selectivity lies in the on-demand design of NF membrane pores in accordance with the size difference between Li+ and Mg2+ ions, but this poses a huge challenge for traditional NF membranes and difficult to be realized. In this work, we report the fabrication of polyamide (PA) NF membranes with ultra-high Li+ /Mg2+ selectivity by modifying the interfacial polymerization (IP) process between piperazine (PIP) and trimesoyl chloride (TMC) with an oil-soluble surfactant that forms a monolayer at oil/water interface, referred to as OSARIP...
March 20, 2024: Nature Communications
https://read.qxmd.com/read/38498471/understanding-rejection-mechanisms-of-trace-organic-contaminants-by-polyamide-membranes-via-data-knowledge-codriven-machine-learning
#4
JOURNAL ARTICLE
Hejia Wang, Jin Zeng, Ruobin Dai, Zhiwei Wang
Data-driven machine learning (ML) provides a promising approach to understanding and predicting the rejection of trace organic contaminants (TrOCs) by polyamide (PA). However, various confounding variables, coupled with data scarcity, restrict the direct application of data-driven ML. In this study, we developed a data-knowledge codriven ML model via domain-knowledge embedding and explored its application in comprehending TrOC rejection by PA membranes. Domain-knowledge embedding enhanced both the predictive performance and the interpretability of the ML model...
March 18, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38497007/simulation-of-nanofiltration-mass-transfer-for-magnesium-and-lithium-separation-in-salt-lakes
#5
JOURNAL ARTICLE
Yueyu Liu, Tingting Li, Qing Guo, Lili Gao, Shaohua Yin, Shiwei Li
A mass transfer model to predict the transport processes of magnesium and lithium ions through porous media in salt lakes has been proposed, which is a combination of the extended Nernst-Planck equation and Donnan effect, accounting for ion diffusion, electromigration, and convection within membrane pores. First, the morphological structure, thickness, surface roughness, and hydrophilicity of the membrane were characterized as fixed parameters, indicating that the surface of the nanofiltration membrane is smooth with low roughness and strong hydrophilicity, resulting in a lower desalination rate but higher water flux...
March 12, 2024: ACS Omega
https://read.qxmd.com/read/38492592/a-novel-zif-l-pei-thin-film-nanocomposite-membrane-for-removing-perfluoroalkyl-substances-pfass-from-water-enhanced-retention-and-high-flux
#6
JOURNAL ARTICLE
Yujie Bi, Xiangmin Meng, Zhijun Tan, Qianqian Geng, Jixing Peng, Qiaozhi Yong, Xiaojie Sun, Mengmeng Guo, Xinping Wang
Membrane separation technology is widely recognized as an effective method for removing perfluoroalkyl substances (PFASs) in water treatment. ZIF-L, a metal-organic framework (MOF) family characterized by its mat-like cavities and leaf-like morphology, has garnered considerable interest and has been extensively employed in fabricating thin-film nanocomposite (TFN) membranes. In this study, a robust, high-performance TFN membrane to remove PFASs in a nanofiltration (NF) process was created through an interfacial polymerization approach on the surface of polysulfone (PSF), incorporating ZIF-L within the selective layer...
March 14, 2024: Science of the Total Environment
https://read.qxmd.com/read/38480727/double-charge-flips-of-polyamide-membrane-by-ionic-liquid-decoupled-bulk-and-interfacial-diffusion-for-on-demand-nanofiltration
#7
JOURNAL ARTICLE
Bian-Bian Guo, Chang Liu, Cheng-Ye Zhu, Jia-Hui Xin, Chao Zhang, Hao-Cheng Yang, Zhi-Kang Xu
Fine design of surface charge properties of polyamide membranes is crucial for selective ionic and molecular sieving. Traditional membranes face limitations due to their inherent negative charge and limited charge modification range. Herein, we report a facile ionic liquid-decoupled bulk/interfacial diffusion strategy to elaborate the double charge flips of polyamide membranes, enabling on-demand transformation from inherently negative to highly positive and near-neutral charges. The key to these flips lies in the meticulous utilization of ionic liquid that decouples intertwined bulk/interfacial diffusion, enhancing interfacial while inhibiting bulk diffusion...
March 13, 2024: Nature Communications
https://read.qxmd.com/read/38460849/from-environmental-issue-to-purification-aid-novel-positively-charged-functionalized-algal-biochar-as-robust-modifier-of-composite-nanofiltration-membranes
#8
JOURNAL ARTICLE
Amin Maleki, Ali Bozorg
Robust membrane modifiers were achieved for the first time by functionalizing the algal biochar of unique porous structure. The biochar was prepared through the pyrolysis of Cladophora glomerata, the most widespread freshwater macroalga, functionalized by diethylenetriamine and dendrimer poly(amidoamine), and employed to fabricate positively charged composite nanofiltration membranes. The presence of hydrophilic functionalizers of positive charge on the membrane was verified through Fourier transform infrared and energy dispersive X-ray analyses and atomic force microscopy and zeta potential measurements were performed to determine surface roughness and confirm positive charge of the modified membranes...
March 7, 2024: Chemosphere
https://read.qxmd.com/read/38451543/polyamide-membranes-with-tunable-surface-charge-induced-by-dipole-dipole-interaction-for-selective-ion-separation
#9
JOURNAL ARTICLE
Song Zhao, Zhenyi Zhao, Xinzhu Zhang, Zhiyuan Zha, Tiezheng Tong, Rong Wang, Zhi Wang
Nanofiltration (NF) has the potential to achieve precise ion-ion separation at the subnanometer scale, which is necessary for resource recovery and a circular water economy. Fabricating NF membranes for selective ion separation is highly desirable but represents a substantial technical challenge. Dipole-dipole interaction is a mechanism of intermolecular attractions between polar molecules with a dipole moment due to uneven charge distribution, but such an interaction has not been leveraged to tune membrane structure and selectivity...
March 7, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38447145/amphiphilic-interlayer-regulated-interfacial-polymerization-for-constructing-polyamide-nanofiltration-membranes-with-high-perm-selectivity-of-mono-divalent-salts
#10
JOURNAL ARTICLE
Xin Zhang, Xu Zhang, Lushen Xu, Guoliang Zhang, Qin Meng
High-quality thin-film composite (TFC) membranes with high selectivity and permeability have great significance owing to their practical applications, specifically for the accurate differentiation of monovalent and divalent ions. However, the trade-off effect between selectivity and permeability is still a big challenge due to the difficult structure adjustment of the selective layer. Herein, polydopamine (PDA) functionalized with a hydrophobic long alkane chain was first explored as a functional amphiphilic interlayer to synthesize high-quality TFC membranes via a confined interfacial polymerization (IP) reaction...
March 6, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38428235/feasibility-of-replacing-proton-exchange-membranes-with-pressure-driven-membranes-in-membrane-electrochemical-reactors-for-high-salinity-organic-wastewater-treatment
#11
JOURNAL ARTICLE
Zhongsen Yan, Xiaolei Chen, Haiqing Chang, Heliang Pang, Gongduan Fan, Kaiqin Xu, Heng Liang, Fangshu Qu
Membrane electrochemical reactor (MER) shows superiority to electrochemical oxidation (EO) in high salinity organic wastewater (HSOW) treatment, but requirement of proton exchange membranes (PEM) increases investment and maintenance cost. In this work, the feasibility of using low-cost pressure-driven membranes as the separation membrane in MER system was systematically investigated. Commonly used pressure-driven membranes, including loose membranes such as microfiltration (MF) and ultrafiltration (UF), as well as dense membranes like nanofiltration (NF) and reverse osmosis (RO), were employed in the study...
February 19, 2024: Water Research
https://read.qxmd.com/read/38423608/surface-modification-of-nanofiltration-membrane-using-polyoxometalates-for-improved-separation-and-antifouling-performance
#12
JOURNAL ARTICLE
Qi Lu, Haodong Yang, Zhe Chen, Lei Yao
In this study, polyoxometalates (POMs) as a core-modifying material was used to fabricate the nanofiltration (NF) membrane on the polyvinylidene fluoride (PVDF) microfiltration membrane substrate via a novel interfacial polymerization (IP) method. The formation mechanism of the POMs-modified composite membrane was proposed. The separation and antifouling properties were further investigated. After cross-linking with POMs through the new IP reaction, the modified composite membrane showed improved hydrophilicity, water flux, and salt rejection...
February 2024: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://read.qxmd.com/read/38422736/polyphenol-mediated-defect-patching-of-graphene-oxide-membranes-for-sulfonamide-contaminants-removal-and-fouling-control
#13
JOURNAL ARTICLE
Daliang Xu, Yumeng Xie, Xinyao Jin, Junfeng Zheng, Qieyuan Gao, Pengrui Jin, Xuewu Zhu, Zifeng Zhang, Xin Li, Guibai Li, Heng Liang, Bart Van der Bruggen
Graphene oxide (GO)-based laminar membranes are promising candidates for next-generation nanofiltration membranes because of their theoretically frictionless nanochannels. However, nonuniform stacking during the filtration process and the inherent swelling of GO nanosheets generate horizontal and vertical defects, leading to a low selectivity and susceptibility to pore blockage. Herein, both types of defects are simultaneously patching by utilizing tannic acid and FeⅢ . Tannic acid first partially reduced the upper GO framework, and then coordinated with FeⅢ to form a metal-polyphenol network covering horizontal defects...
February 24, 2024: Journal of Hazardous Materials
https://read.qxmd.com/read/38408819/ultrathin-organic-solvent-nanofiltration-membrane-with-polydopamine-hkust-1-interlayer-for-organic-solvent-separation
#14
JOURNAL ARTICLE
Haike Li, Xindong Li, Guozai Ouyang, Lijinhong Huang, Lang Li, Wenhao Li, Wanfu Huang, Duokun Li
Polydopamine (PDA) and metal-organic skeleton HKUST-1 were co-deposited on the base membrane of hexamethylenediamine (HDA)-crosslinked polyetherimide (PEI) ultrafiltration membrane as the interlayer, and high-throughput organic solvent nanofiltration membrane (OSN) was prepared by interfacial polymerization and solvent activation reaction. The polyamide (PA) layer surface roughness from 28.4 nm in PA/PEI to 78.3 nm in PA/PDA-HKUST-10.6 /PEI membrane, reduced the thickness of the separation layer from 79 to 14 nm, and significantly improved the hydrophilic, thermal and mechanical properties...
July 2024: Journal of Environmental Sciences (China)
https://read.qxmd.com/read/38408434/surface-modification-of-nanopores-in-an-anodic-aluminum-oxide-membrane-through-dopamine-assisted-codeposition-with-a-zwitterionic-polymer
#15
JOURNAL ARTICLE
Chien-Wei Chu, Chia-Hsuan Tsai
Surface modification through dopamine-assisted codeposition with functional zwitterionic polymers can provide a simple and one-step functionalization under ambient conditions with robust and stable dopamine-surface interactions to improve the hydrophilicity of nanoporous membranes, thereby expanding their applicability to nanofiltration, ion transport, and blood purification. However, a significant knowledge gap remains in our comprehension of the mechanisms underlying the formation and deposition of dopamine/polymer aggregated coatings within nanoscale confinement...
February 26, 2024: Langmuir: the ACS Journal of Surfaces and Colloids
https://read.qxmd.com/read/38401635/microbial-strategies-for-copper-pollution-remediation-mechanistic-insights-and-recent-advances
#16
REVIEW
Abdulrab Ahmed M Alkhanjaf, Sonu Sharma, Monu Sharma, Raman Kumar, Naresh Kumar Arora, Brajesh Kumar, Ahmad Umar, Sotirios Baskoutas, Tapan Mukherjee
Environmental contamination is aninsistent concern affecting human health and the ecosystem. Wastewater, containing heavy metals from industrial activities, significantly contributes to escalating water pollution. These metals can bioaccumulate in food chains, posing health risks even at low concentrations. Copper (Cu), an essential micronutrient, becomes toxic at high levels. Activities like mining and fungicide use have led to Copper contamination in soil, water, and sediment beyond safe levels. Copper widely used in industries, demands restraint of heavy metal ion release into wastewater for ecosystem ultrafiltration, membrane filtration, nanofiltration, and reverse osmosis, combat heavy metal pollution, with emphasis on copper...
February 22, 2024: Environmental Pollution
https://read.qxmd.com/read/38393198/simultaneously-recovery-of-thorium-and-tungsten-through-hybrid-electrolysis-nanofiltration-processes
#17
JOURNAL ARTICLE
Geani Teodor Man, Paul Constantin Albu, Aurelia Cristina Nechifor, Alexandra Raluca Grosu, Diana Ionela Popescu Stegarus, Vlad-Alexandru Grosu, Virgil Emanuel Marinescu, Gheorghe Nechifor
The recovery and recycling of metals that generate toxic ions in the environment is of particular importance, especially when these are tungsten and, in particular, thorium. The radioactive element thorium has unexpectedly accessible domestic applications (filaments of light bulbs and electronic tubes, welding electrodes, and working alloys containing aluminum and magnesium), which lead to its appearance in electrical and electronic waste from municipal waste management platforms. The current paper proposes the simultaneous recovery of waste containing tungsten and thorium from welding electrodes...
January 26, 2024: Toxics
https://read.qxmd.com/read/38392665/a-new-approach-for-bioremediation-of-olive-mill-wastewaters-combination-of-straw-filtration-and-nanofiltration
#18
JOURNAL ARTICLE
Francesco Chidichimo, Maria Rita Basile, Carmela Conidi, Giovanni De Filpo, Rosanna Morelli, Alfredo Cassano
A combination of straw filtration and nanofiltration was investigated for the first time as a sustainable approach aimed at valorizing olive mill wastewaters (OMWs) within a circular economy strategy. Ground straw filters with different granulometry (120, 250 and 500 μm) were tested in the first step to clarify the raw wastewater. The 500 μm filter offered the best performance due to a lower exposed surface of the filtering fibers and a shorter filtering time, allowing us to reduce about 70% of the chemical oxygen demand (COD) of the raw wastewater...
January 31, 2024: Membranes
https://read.qxmd.com/read/38392661/ultra-stable-inorganic-mesoporous-membranes-for-water-purification
#19
JOURNAL ARTICLE
Ralph A Bauer, Minghui Qiu, Melissa C Schillo-Armstrong, Matthew T Snider, Zi Yang, Yi Zhou, Hendrik Verweij
Thin, supported inorganic mesoporous membranes are used for the removal of salts, small molecules (PFAS, dyes, and polyanions) and particulate species (oil droplets) from aqueous sources with high flux and selectivity. Nanofiltration membranes can reject simple salts with 80-100% selectivity through a space charge mechanism. Rejection by size selectivity can be near 100% since the membranes can have a very narrow size distribution. Mesoporous membranes have received particular interest due to their (potential) stability under operational conditions and during defouling operations...
January 27, 2024: Membranes
https://read.qxmd.com/read/38392655/membrane-separation-of-chicken-byproduct-hydrolysate-for-up-concentration-of-bioactive-peptides
#20
JOURNAL ARTICLE
Janka Dibdiakova, Josipa Matic, Sileshi Gizachew Wubshet, Wolfgang Uhl, Lelum Duminda Manamperuma, Bjørn Rusten, Eilen Arctander Vik
Membrane processes, such as microfiltration, ultrafiltration, and nanofiltration, are increasingly used for various applications in both upstream and downstream processing. Membrane-based processes play a critical role in the field of separation/purification of biotechnological products, including protein production/purification. The possibility of using membranes to separate peptides from a chicken byproduct hydrolysate and the effect of the performed downstream processing on the DPP-IV dipeptidyl peptidase IV (DPP-IV) inhibitory activity of mechanical deboning chicken residue (MDCR) has been investigated...
January 23, 2024: Membranes
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