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Tuning the primary selective nanochannels of MOF thin-film nanocomposite nanofiltration membranes for

《环境科学与工程前沿（英文）》 2022年 第16卷 第4期 doi: 10.1007/s11783-021-1474-7

摘要：

• PA layer properties tune the primary nanochannels in MIL-101(Cr) TFN NF membranes.

关键词： Porous metal organic framework     Thin-film nanocomposite membrane     Primary selective nanochannels     Nanofiltration     Endocrine disrupting compounds    

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Control strategies for disinfection byproducts by ion exchange resin, nanofiltration and their sequential

《环境科学与工程前沿（英文）》 2023年 第17卷 第10期 doi: 10.1007/s11783-023-1725-x

摘要：

● Effects of AER adsorption and NF on DBP precursors, DBPs, and TOX were examined.

关键词： Disinfection byproducts     Control     Anion exchange resin     Nanofiltration     Cytotoxicity    

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Nanofiltration for drinking water treatment: a review

《化学科学与工程前沿（英文）》 2022年 第16卷 第5期   页码 681-698 doi: 10.1007/s11705-021-2103-5

摘要： In recent decades, nanofiltration (NF) is considered as a promising separation technique to produce drinking water from different types of water source. In this paper, we comprehensively reviewed the progress of NF-based drinking water treatment, through summarizing the development of materials/fabrication and applications of NF membranes in various scenarios including surface water treatment, groundwater treatment, water reuse, brackish water treatment, and point of use applications. We not only summarized the removal of target major pollutants (e.g., hardness, pathogen, and natural organic matter), but also paid attention to the removal of micropollutants of major concern (e.g., disinfection byproducts, per- and polyfluoroalkyl substances, and arsenic). We highlighted that, for different applications, fit-for-purpose design is needed to improve the separation capability for target compounds of NF membranes in addition to their removal of salts. Outlook and perspectives on membrane fouling control, chlorine resistance, integrity, and selectivity are also discussed to provide potential insights for future development of high-efficiency NF membranes for stable and reliable drinking water treatment.

关键词： nanofiltration     drinking water     disinfection byproducts     micropollutants     selectivity    

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Tailoring the microstructure and properties of PES/SPSf loose nanofiltration membranes using SPES as

《化学科学与工程前沿（英文）》 2023年 第17卷 第10期   页码 1555-1567 doi: 10.1007/s11705-023-2338-4

摘要： Herein, polyethersulfone (PES) and sulfonated polysulfone (SPSf) blend membranes were prepared with addition of sulfonated polyethersulfone (SPES) as a hydrophilic polymer and adipic acid as a porogen via non-solvent induced phase separation method for effective fractionation of dyes based on the influence of steric hindrance and charge effect. Raman spectroscopy and molecular dynamic simulation modeling confirmed that hydrogen bonds between PES, SPSf, SPES, and adipic acid were crucial to membrane formation and spatial arrangement. Further addition of hydrophilic SPES resulted in a membrane with reduced pore size and molecular weight cut-off as well as amplified negative charge and pure water permeance. During separation, the blend membranes exhibited higher rejection rates for nine types of small molecular weight (269.3–800 Da) dyes than for neutral polyethylene glycol molecules (200–1000 Da). This was attributed to the size effect and the synergistic effect between steric hindrance and charge repulsion. Notably, the synergistic impact decreased with dye molecular weight, while greater membrane negative charge enhanced small molecular dye rejection. Ideal operational stability and anti-fouling performance were best observed in M2 (PES/SPSf/SPES, 3.1 wt %). Summarily, this study demonstrates that SPES with –SO3‒ functional groups can be applied to control the microstructure and separation of membranes.

关键词： adipic acid     loose nanofiltration membrane     dye/salt selective separation     steric hindrance     charge effect    

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Role of water chemistry on estrone removal by nanofiltration with the presence of hydrophobic acids

Xue JIN,Jiangyong HU

《环境科学与工程前沿（英文）》 2015年 第9卷 第1期   页码 164-170 doi: 10.1007/s11783-014-0747-9

摘要： Hydrophobic acid organic matter (HpoA) extracted from treated effluent has been known to improve the rejection of steroid hormone estrone by reverse osmosis (RO) and nanofiltration (NF) membranes. In this study, the effects of solution chemistry (solution pH and ionic strength) on the estrone rejection by NF membrane with the presence of HpoA were systematically investigated. Crossflow nanofiltration experiments show that the presence of HpoA significantly improved estrone rejection at all pH and ionic strength levels investigated. It is consistently shown that the “enhancement effect” of HpoA on estrone rejection at neutral and alkaline pH is attributed to the binding of estrone by HpoA macromolecules via hydrogen bonding between phenolic functional groups in feed solutions, which leads to an increase in molecular weight and appearance of negative charge. The membrane exhibited the best performance in terms of estrone rejection at pH 10.4 (compared to pH 4 and pH 7) as a result of strengthening the electrostatic repulsion between estrone and membrane with the presence of HpoA. At neutral pH level, the ability of HpoA macromolecules to promote estrone rejection became stronger with increasing ionic strength due to their more extended conformation, which created more chances for the association between estrone and HpoA. The important conclusion of this study is that increasing solution pH and salinity can greatly intensify the “enhancement effect” of HpoA. These results can be important for NF application in direct/indirect potable water reuse.

关键词： indirect potable water reuse     steroid hormone     nanofiltration(NF)     rejection     water chemistry     hydrophobic acids    

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Ionic strength directed self-assembled polyelectrolyte single-bilayer membrane for low-pressure nanofiltration

《化学科学与工程前沿（英文）》 2022年 第16卷 第5期   页码 699-708 doi: 10.1007/s11705-021-2093-3

摘要： Layer-by-layer assembly is a versatile technique for fabricating nanofiltration membranes, where multiple layers of polyelectrolytes are usually required to achieve reasonable separation performance. In this work, an ionic strength directed self-assembly procedure is described for the preparation of nanofiltration membranes consisting of only a single bilayer of poly(diallyldimethylammoniumchloride) and poly(sodium-4-styrenesulfoate). The influence of background ionic strength as well as membrane substrate properties on the formation of single-bilayer membranes are systematically evaluated. Such a simplified polyelectrolyte deposition procedure results in membranes having outstanding separation performance with permeating flux of 14.2 ± 1.5 L∙m–2∙h–1∙bar–1 and Na2SO4 rejection of 97.1% ± 0.8% under a low applied pressure of 1 bar. These results surpass the ones for conventional multilayered polyelectrolyte membranes. This work encompasses an investigation of ionic strength induced coiling of the polyelectrolyte chains and emphasizes the interplay between-polyelectrolyte chain configuration and substrate pore profile. It thus introduces a new concept on the control of membrane fabrication process toward high performance nanofiltration.

关键词： layer-by-layer self-assembly     single bilayer     nanofiltration membrane     desalination    

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Influence of pore size and membrane surface properties on arsenic removal by nanofiltration membranes

Nathalie Tanne, Rui Xu, Mingyue Zhou, Pan Zhang, Xiaomao Wang, Xianghua Wen

《环境科学与工程前沿（英文）》 2019年 第13卷 第2期 doi: 10.1007/s11783-019-1105-8

摘要：

Four NF membranes were compared regarding arsenate rejection and their properties.

Rejection of arsenate had no relationship with membrane pore size.

A more negative surface charge was favorable for arsenate rejection at neutral pH.

A severe membrane fouling could lead to a great reduction of arsenic rejection.

关键词： Arsenate     Nanofiltration     Drinking water     Membrane property     Membrane fouling    

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Modeling of the separation performance of nanofiltration membranes and its role in the applications ofnanofiltration technology in product separation processes

SHANG Weijuan, WANG Daxin, WANG Xiaolin

《化学科学与工程前沿（英文）》 2007年 第1卷 第2期   页码 208-215 doi: 10.1007/s11705-007-0038-0

摘要： Although there is a voluminous literature on the determination of structural parameters (the pore radius, the ratio of membrane porosity to membrane thickness) of a nanofiltration (NF) membrane and its separation performance (such as the rejection and the permeation flux) by the simplified Teorell-Meyer-Sievers (TMS) model, little of this research comments on other theories and the consequences of linking modeling evaluation to technological application. Theories used to predict the separation performance of an NF membrane usually include: the non-equilibrium thermodynamic model, the pore model, the space charge model, the TMS model, the electrostatic and steric-hindrance model, and the semiempirical model. In the article, we briefly trace the origins or the general ideas of the above-mentioned theories. From there, recent researches on the characterization of membrane structural parameters and electrical properties (such as the surface charge density ) are reviewed. We then turn to research on the separation performance of an NF membrane for single-component solutions of inorganic electrolytes, neutral organic solutions, and a mixture solution of electrolytes or that of an electrolyte and neutral organic solute. Afterwards, we outline the applications of NF technology in the processes of product separation and conclude with a discussion on the role of models in such applications.

关键词： above-mentioned     TMS     characterization     electrostatic     semiempirical    

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Using loose nanofiltration membrane for lake water treatment: A pilot study

《环境科学与工程前沿（英文）》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1362-6

摘要：

• A pilot study was conducted for drinking water treatment using loose NF membranes.

关键词： Nanofiltration     Drinking water     Membrane fouling     Aluminum carryover     Chemical cleaning    

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Nanofiltration for separation and purification of saccharides from biomass

Xianhui Li, Sheng Tan, Jianquan Luo, Manuel Pinelo

《化学科学与工程前沿（英文）》 2021年 第15卷 第4期   页码 837-853 doi: 10.1007/s11705-020-2020-z

摘要： Saccharide production is critical to the development of biotechnology in the field of food and biofuel. The extraction of saccharide from biomass-based hydrolysate mixtures has become a trend due to low cost and abundant biomass reserves. Compared to conventional methods of fractionation and recovery of saccharides, nanofiltration (NF) has received considerable attention in recent decades because of its high selectivity and low energy consumption and environmental impact. In this review the advantages and challenges of NF based technology in the separation of saccharides are critically evaluated. Hybrid membrane processes, i.e., combining NF with ultrafiltration, can complement each other to provide an efficient approach for removal of unwanted solutes to obtain higher purity saccharides. However, use of NF membrane separation technology is limited due to irreversible membrane fouling that results in high capital and operating costs. Future development of NF membrane technology should therefore focus on improving material stability, antifouling ability and saccharide targeting selectivity, as well as on engineering aspects such as process optimisation and membrane module design.

关键词： saccharides     nanofiltration membrane     hybrid membrane process     biomas    

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Charge and separation characteristics of nanofiltration membrane embracing dissociated functional groups

Zhun MA,Meng WANG,Xueli GAO,Congjie GAO

《环境科学与工程前沿（英文）》 2014年 第8卷 第5期   页码 650-658 doi: 10.1007/s11783-013-0605-1

摘要： The current work focused on the investigation of charge and separation characteristics of nanofiltration (NF) membrane embracing dissociated functional groups under different electrolyte solutions. The electro-kinetic method was carried out to assess the membrane volume charge density ( ) with different salt concentrations ranging from 0.1 to 10 mol·m and different electrolyte species, such as type 1–1, type 2–1 and type 3–1. The Donnan steric pore model-dielectric exclusion (DSPM-DE) model was employed to evaluate the separation characteristics of the NF membrane for wide range of electrolyte concentration (from 25.7 to 598.9 mol·m ). The results indicated that the dissociation of the hydrophilic functional groups and the specific adsorption contributed to charge formation on membrane surface. The former played a dominant role in type 1–1 and type 2–1 electrolytes at dilute aqueous solutions (0.1–0.5 mol·m ). However, for type 3–1 electrolyte, specific adsorption should contribute to the charge effect to a large extent. Moreover, the correlation between the volume charge density and feed concentration was in accordance with Freundlich isotherm. Furthermore, it was found that the separation characteristic of NF membrane could be evaluated well by DSPM-DE model coupling with electro-kinetic method in a whole concentration range.

关键词： Sulfonated polyethersulfone nanofiltration membrane     charge characteristics     electro-kinetic method     volume charge density     separation behavior    

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Novel polyethyleneimine/TMC-based nanofiltration membrane prepared on a polydopamine coated substrate

Zhe Yang, Xiaoyu Huang, Jianqiang Wang, Chuyang Y. Tang

《化学科学与工程前沿（英文）》 2018年 第12卷 第2期   页码 273-282 doi: 10.1007/s11705-017-1695-2

摘要： Most commercial NF membranes are negatively charged at the pH range of a typical feed solution. In order to enhance the removal of cations (such as Mg or Ca ), we utilized polyethyleneimine (PEI) and trimesoyl chloride (TMC) to perform interfacial polymerization reaction on a polydopamine coated hydrolyzed polyacrylonitrile substrate to obtain a positively charged nanofiltration membrane. Effects of polydopamine coating time, PEI concentration, TMC reaction time and concentration on the membrane physicochemical properties and separation performance were systematically investigated using scanning electron microscopy, streaming potential and water contact angle measurements. The optimal NF membrane showed high rejection for divalent ions (93.6±2.6% for MgSO , 92.4±1.3% for MgCl , and 90.4±2.1% for Na SO ), accompanied with NaCl rejection of 27.8±2.5% with a permeation flux of 17.2±2.8 L·m ·h at an applied pressure of 8 bar (salt concentrations were all 1000 mg·L ). The synthesized membranes showed promising potentials for the applications of water softening.

关键词： nanofiltration     polyethyleneimine     trimesoyl chloride     polydopamine     positively charged rejection layer    

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ion-responsive copolymer into polysulfone support membrane on the performance of thin-film composite nanofiltration

Meibo He, Zhuang Liu, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

《化学科学与工程前沿（英文）》 2019年 第13卷 第2期   页码 400-414 doi: 10.1007/s11705-018-1757-0

摘要： Thin-film composite (TFC) nanofiltration (NF) membranes were fabricated via the interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricarbonyl trichloride on polysulfone (PSf) support membranes blended with K -responsive poly( -isopropylacryamide-co-acryloylamidobenzo-15-crown-5) (P(NIPAM-co-AAB C )). Membranes were characterized by attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscope, scanning electron microscope, contact angle, and filtration tests. The results showed that: (1) Under K -free conditions, the blended P(NIPAM-co-AAB C )/PSf supports had porous and hydrophilic surfaces, thereby producing NF membranes with smooth surfaces and low MgSO rejections; (2) With K in the PIP solution, the surface roughness and water permeability of the resultant NF membrane were increased due to the K -induced transition of low-content P(NIPAM-co-AAB C ) from hydrophilic to hydrophobic; (3) After a curing treatment at 95 °C, the improved NF membrane achieved an even higher pure water permeability of 10.97 L·m ·h ·bar under 200 psi. Overall, this study provides a novel method to improve the performance of NF membranes and helps understand the influence of supports on TFC membranes.

关键词： nanofiltration     interfacial polymerization     support membrane     potassium ion-responsive     thin-film composite    

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Flow synthesis of a novel zirconium-based UiO-66 nanofiltration membrane and its performance in the removal

Feichao Wu, Yanling Wang, Xiongfu Zhang

《化学科学与工程前沿（英文）》 2020年 第14卷 第4期   页码 651-660 doi: 10.1007/s11705-019-1819-y

摘要： In this work, a thin zirconium-based UiO-66 membrane was successfully prepared on an alumina hollow fiber tube by flow synthesis, and was used in an attempt to remove -nitrophenol from water through a nanofiltration process. Two main factors, including flow rate and synthesis time, were investigated to optimize the conditions for membrane growth. Under optimal synthesis conditions, a thin UiO-66 membrane of approximately 2 µm in thickness was fabricated at a flow rate of 4 mL·h for 30 h. The -nitrophenol rejection rate for the as-prepared UiO-66 membrane applied in the removal of -nitrophenol from water was only 78.1% due to the existence of membrane defects caused by coordinative defects during membrane formation. Post-synthetic modification of the UiO-66 membrane was carried out using organic linkers with the same flow approach to further improve the nanofiltration performance. The result showed that the -nitrophenol rejection for the post-modified membrane was greatly improved and reached over 95%. Moreover, the post-modified UiO-66 membrane exhibited remarkable long-term operational stability, which is vital for practical application.

关键词： UiO-66 membrane     flow synthesis     nanofiltration     p-nitrophenol removal    

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Preparation and performance of novel thermal stable composite nanofiltration membrane

WU Chunrui, ZHANG Shouhai, YANG Fajie, YAN Chun, JIAN Xigao

《化学科学与工程前沿（英文）》 2008年 第2卷 第4期   页码 402-406 doi: 10.1007/s11705-008-0063-7

摘要： The novel thermal stable composite nanofiltration membranes were prepared through the interfacial polymerization of piperazine and trimesoyl chloride on the poly (phthalazinone ether) ultrafiltration substrate. The effects of polymerization and testing conditions on membrane performance were studied. The surface morphologies of the substrate and the composite membranes were observed by means of scanning electron microscopy (SEM) and atomic force microscopy (AFM). The separation properties of membranes for dyes and salts were tested. The composite membranes show good thermal stability. The rejection for NaSO was kept over 96%, while the flux reached 400 L·m·h when it was tested at 1.0 MPa and 80°C. When tested at 1.0 MPa and 60°C, the rejection of the composite membrane for dyes was kept at high level, and the flux reached 180–210 Lm·h, while the rejection for NaCl was lower than 20%.

关键词： electron microscopy     rejection     composite membrane     interfacial polymerization     thermal stability    

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标题 作者 时间 类型 操作

Tuning the primary selective nanochannels of MOF thin-film nanocomposite nanofiltration membranes for

期刊论文

Control strategies for disinfection byproducts by ion exchange resin, nanofiltration and their sequential

期刊论文

Nanofiltration for drinking water treatment: a review

期刊论文

Tailoring the microstructure and properties of PES/SPSf loose nanofiltration membranes using SPES as

期刊论文

Role of water chemistry on estrone removal by nanofiltration with the presence of hydrophobic acids

Xue JIN,Jiangyong HU

期刊论文

Ionic strength directed self-assembled polyelectrolyte single-bilayer membrane for low-pressure nanofiltration

期刊论文

Influence of pore size and membrane surface properties on arsenic removal by nanofiltration membranes

Nathalie Tanne, Rui Xu, Mingyue Zhou, Pan Zhang, Xiaomao Wang, Xianghua Wen

期刊论文

Modeling of the separation performance of nanofiltration membranes and its role in the applications ofnanofiltration technology in product separation processes

SHANG Weijuan, WANG Daxin, WANG Xiaolin

期刊论文

Using loose nanofiltration membrane for lake water treatment: A pilot study

期刊论文

Nanofiltration for separation and purification of saccharides from biomass

Xianhui Li, Sheng Tan, Jianquan Luo, Manuel Pinelo

期刊论文

Charge and separation characteristics of nanofiltration membrane embracing dissociated functional groups

Zhun MA,Meng WANG,Xueli GAO,Congjie GAO

期刊论文

Novel polyethyleneimine/TMC-based nanofiltration membrane prepared on a polydopamine coated substrate

Zhe Yang, Xiaoyu Huang, Jianqiang Wang, Chuyang Y. Tang

期刊论文

ion-responsive copolymer into polysulfone support membrane on the performance of thin-film composite nanofiltration

Meibo He, Zhuang Liu, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

期刊论文

Flow synthesis of a novel zirconium-based UiO-66 nanofiltration membrane and its performance in the removal

Feichao Wu, Yanling Wang, Xiongfu Zhang

期刊论文

Preparation and performance of novel thermal stable composite nanofiltration membrane

WU Chunrui, ZHANG Shouhai, YANG Fajie, YAN Chun, JIAN Xigao

期刊论文