DESALINATION
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2025
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IF 9.8
Zezhen Zhang,Zekun Zhou,Shuman Feng,Lili Wu,Shanjun Gao
Membrane-based separation technologies often face a trade-off between selectivity and permeability, which represents a significant technical challenge in current research. In this study, vacuum-assisted surface deposition technology was utilized to co -deposit piperazine (PIP) and MXene onto a polyvinylidene fluoride (PVDF) microfiltration membrane. This was followed by interfacial polymerization, initiated by trimesoyl chloride (TMC), to form a polyamide (PA) network, resulting in the fabrication of a conductive thin-film nanocomposite membrane (CTFN-2). The results showed that the CTFN-2 membrane had a uniform PIP-TMC/MXene coating with a distinctive wrinkled structure on its surface, contributing to its high permeate flux and solute rejection. The membrane's separation performance was evaluated using a custom-built low-pressure cross-flow conductive membrane setup. The CTFN-2 membrane selectively rejected various ionic dyes under both positive and negative voltages, with an increased rejection rate for inorganic salts as the voltage rose. Notably, after being stored in deionized water for 180 days, the CTFN-2 membrane maintained stable dye separation performance. This research offers a novel approach for developing efficient and controllable separation membrane materials.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 89
·56204-56210
·
IF 3.108
Runlin Han,Xufeng Ma,Yongli Xie,Da Teng,Shouhai Zhang
MXene, a new 2D transition metal carbide-based material, possesses excellent electrical conductivity and hydrophilicity. In this study, Ti3C2Tx (where T represents a functional group (O, OH, and/or F)) was produced by etching and ultrasonicating Ti3AlC2. Then, it was used to prepare the MXene composite membrane via a simple filtration method performed at 0.2 MPa on a polyethersulfone (PES) ultrafiltration membrane. The MXene composite membrane shows excellent flux (115 L m−2 h−1) and favorable rejection to Congo red dye (92.3% at 0.1 MPa). The membrane demonstrated rejection to inorganic salts below 23% with flux above 432 L m−2 h−1 at 0.1 MPa. Due to its loose lamellar structure, the composite membrane is able to demonstrate efficient permselectivity in the separation of dyes from salts. Furthermore, the composite membrane shows excellent hydrophilicity and flux because of the lamellar hydrophilic MXene.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xinyi Wang,Zezhen Zhang,Weishan Deng,Haolan Xiao,Liming Xia,Lili Wu
Carbon nanotube (CNT) is a promising raw material for membrane fabrication due to its good electrical conductivity, great specific surface area, and special piping structure. In this report, tannin (TA), CNT, and D-aspartic acid (DAS) were co -deposited on the surface of polyethersulfone (PES) ultrafiltration membrane to construct an electrically responsive coating. The membrane can maintain the high electrical conductivity while avoiding the membrane defects due to the accumulation of CNTs and the different lengths of chain segments in the process of CNT co-blending to form the membrane. The results show that the average pore size of the membrane is reduced from 19.55 nm to 8.165 nm, and the retention capacity is greatly improved, showing good separation efficiency (99.5 %) and hydrophilicity (water contact angle of 13°). Through adsorption and electric field deflection, CNT endows the membrane with the ability to selectively separate dyestuffs with different electrically charged properties. Long-term stability tests show that the modified membrane still maintains a high level of pure water flux and conductivity after seven days of operation. This paper is of exploratory significance in the field of electrically responsive smart membranes for dye separation. The membrane developed in this study exhibits unique selective separation performance and can dynamically adjust its separation efficiency by externally controlling the electric field strength. This demonstrates its excellent intelligence, making it highly promising for applications in electrically responsive intelligent separation membranes. Additionally, it offers a novel approach for treating dye-containing wastewater using electrically charged functional membranes.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qieyuan Gao,Dennis Bouwen,Shushan Yuan,Xiahui Gui,Yaowen Xing,Junfeng Zheng,Hongbin Ling,Qingjuan Zhu,Yue Wang,Stef Depuydt,Junwei Li,Alexander Volodine,Pengrui Jin,Bart Van der Bruggen
In today's energy crisis and shortage of resources, resource recycling on the premise of saving energy is a crucial topic. Large volumes of wastewater containing dye/salt mixtures in the textile industry are generated. In the process of treating textile wastewater, a membrane with better solute transport properties can be used to selectively remove solutes at constant energy input to save energy. Moreover, due to the challenging environment of typical textile wastewater, the membrane also needs to have a certain robustness. In this study, β-cyclodextrin and mussel-inspired polydopamine were combined using host-guest chemistry and then cross-linked by glutaraldehyde to form a robust loose separation layer. The results show that the membranes obtained by this process have a dye rejection greater than 99% and a salt rejection of about 16%. With the high degree of crosslinking at the surface, the membrane was found to exhibit excellent robustness in corrosive media at different pH values. Due to the high degree of cross-linking of the surface, the modified membrane also has good anti-fouling and anti-bacterial properties. Filtration using different concentrations of dye/salt mixed solutions demonstrated the stability of the membrane for filtration in highly concentrated salt solutions. In addition, a long-term stability test proved that the membrane operates stably for more than 60 h, maintaining its selectivity. This membrane with excellent robustness can provide technical guidance and theoretical support for the large-scale application of loose nanofiltration membranes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Qingqing Guo,Xin Wu,Yanhong Ji,Yufan Hao,Shuyu Liao,Zhenyu Cui,Jianxin Li,Mohammad Younas,Benqiao He
Nanofiltration (NF) membranes with adjustable permeability and selectivity are highly desired for the separation of small molecules. A novel pH-responsive NF membrane was synthesized via interfacial polymerization with a mixture of piperazine (PIP) and chitosan (CS) as the aqueous phase and trimesoyl chloride (TMC) in n-hexane as the organic phase. The effects of pH on the physicochemical structure and performance of the PIP-CS/TMC NF membrane obtained were studied in detail. The results showed that the surface physicochemical structure and performance of the membrane could be changed by adjusting the pH of feed solution. Specifically, the surface roughness, hydrophilicity and pore size of the NF membrane were increased at high pH values. The pure water flux through the NF membrane remained stable in the pH range 2–8 but increased exponentially from 248.2 to 643.8 L m −2 ·h −1 as the pH was increased from 8 to 12. Furthermore, the PIP-CS/TMC NF membrane demonstrated more than 99.0% rejection for Congo red, methyl blue, coomassie brilliant blue G250 in the pH range 2–12, while low rejection was observed for methyl orange and inorganic salts (Na 2 SO 4 , MgCl 2 ) at pH 12. The NF membrane exhibited excellent separation performance of the mixtures of anionic dye/salt or dye/dye with different molecular weights at pH 12. The reversibility of pH response with a high responsive coefficient of the NF membrane was also proved. This work provides a new route for NF membrane in the separation of some dye/salt and mixed dyes systems.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wei Li,Linghao Wang,Menghao Lin,Li Chen,Xinjuan Zeng,Lichun Dong,Cailong Zhou
Mixed matrix membranes (MMMs) have emerged as a promising solution for the treatment of dye wastewater. A key challenge in advancing MMMs is how to effectively integrate two nanofillers with distinct advantages to mitigate the limitations of single-nanofiller systems. In this study, we present a binary nanofiller strategy, utilizing metal–organic frameworks (MOFs) and covalent organic frameworks (COFs), to fabricate polyvinylidene fluoride (PVDF) based MMMs. By systematically adjusting the mass ratio of ZIF-8 MOF and TFB-BD(Me) 2 COF, the separation efficiency of membranes for dyes with different charges, capitalizing on the molecular sieving properties of MOFs and the superior compatibility of COFs was evaluated. The optimized membrane demonstrated a rejection of 91.66% for Congo red (CR), along with a water permeance of 641.9 L m −2 h −1 bar −1 . This work represents a novel attempt in the design of binary-nanofiller MMMs, offering new insights into the synergistic effects of hybrid nanofillers in membrane technology.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yun-Hao Xia,Ying-Ying Gui,Jia-Hua Zhou,Gui-E Chen,Zhen-Liang Xu
Poly (vinylidene fluoride) (PVDF) membranes are often corroded, leading to structural defects in the treatment of alkaline textile wastewater, greatly reducing separation efficiency. Herein, PVDF membranes were surface-modified through coating and self-assembly methods. Novel adhesives (ad-LNPs) were prepared by heat-releasing endo -crosslinked 2,2-Bis (4-glycidyloxyphenyl) propane (BADE) in lignin (LNP). ad-LNPs coatings provided stable adhesion properties to the PVDF membrane surface and exhibited pH-switchable surface charge with excellent alkali resistance. Subsequently, benzene amine monomers and water-soluble 2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS) are introduced to form a polymer network (AMPS-PANI) layer through self-assembly. The results showed that the membrane permeability and selectivity reached the optimal equilibrium point when the aniline monomers self-polymerization time was 40 min (temperature: 5–10 °C). High dye retention (MB:99.8 %, RhB:99.5 %, CR:98 %, MO:96.2 %) at high purity water flux (172 L·m −2 ·h −1 ). Meanwhile, clever utilization of AMPS swelling behavior imparts the modified membrane with physical self-healing properties, as evidenced by scanning electron microscope (SEM) images showing the filling effect of the repaired membrane. Additionally, the construction of a hydrophilic interface increases the contamination resistance (FRR) of the modified membrane to 97 %. In conclusion, the prepared membrane (M4) not only effectively separates dyes/salts but also exhibits excellent alkali resistance and physical self-healing functionality, demonstrating significant potential for practical treatment of alkaline textile wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yiling He,Siming Yan,Yi He,Jing Yu,Shuangshuang Li,Xianmin Gong,Gou Rui
Graphene oxide (GO) membranes have been extensively studied for the separation and purification of dye wastewater. Improving the stability, permeability and self-cleaning ability of these materials is urgently needed for the purification of complex dye wastewater. In this study, we developed a simple and effective method to insert ternary β-iron hydroxide (β-FeOOH) between GO nanosheets and modify the membrane surface with dopamine hydrochloride (PDA) to solve this problem. The pure water flux of the composite membrane was 9 times higher than that of the pure GO membrane (92.82 L m −2 h −1 ), and the rejection of dye molecules larger than 400 Da was consistently greater than 99 %. The PDA/GO-β-FeOOH 2 composite membrane was operated for 50 h (with xenon lamp irradiation to clean the membrane surface) with a flux of 34.98 L m −2 h −1 and a rejection rate consistently higher than 98.5 %.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Siyu Zhou,Xiaoquan Feng,Junyong Zhu,Qiangqiang Song,Guang Yang,Yatao Zhang,Bart Van der Bruggen
Although membrane separations have evinced an enormous potential in the treatment of dye wastewater, the ubiquitous membrane fouling leads to a dramatic decline of separation efficacy and life span, impeding the progress of membrane-based applications. The copper-triazolate MOFs (CuTz-1) exhibit robust thermal and chemical stability with a unique feature of degrading organic molecules under the visible light, rendering them highly promising for construction of self-cleaning membrane. This study presents the utilization of photocatalytic MOFs (CuTz-1) for construction of the CuTz-1/graphene oxide (CuTz-1/GO) composite membranes via filtration-assisted assembly followed by chemical crosslinking. The presence of CuTz-1 among the GO nanosheets promotes an enhancement of the GO interlayer distance, thereby promoting a higher water flux without compromising the dye rejections. The best-performing CuTz-1/GO membranes exhibits the high water permeance of 40.2 L m −2 h −1 bar −1 and superior dye rejections (Congo red: 99.4%, direct red: 98.2%, methyl blue: 94.9%), low salt rejections (e.g., NaCl: 0.3% and Na 2 SO 4 : 19.6%), as well as long-term nanofiltration stability. Furthermore, after visible light irradiation, the treated membrane was nearly recovered to have the original separation efficacy due to effective photocatalytic removal of the attached dyes from the membrane surface. The CuTz-1/GO membrane also exhibits an ultra-high bacteriostasis rate of 100%, probably to be ascribed to the combined antimicrobial effect of CuTz-1 and GO. This work is expected to give a useful guideline for developing loose nanofiltration membranes with favorable photocatalytic and antimicrobial properties, offering an appropriate solution of using self-cleaning membranes for the treatment of dye wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yuhang Li,Bingbing Chen,Huiyan Gao,Qiuyue Hu,Xing Gao,Yuanlin Fu,Aoxiang Zhang,Tieqiang Wang,Jun Zhou,Yu Fu
The effective separation of dyes and desalination represents a critical challenge in treating high-salinity dye wastewater. Herein, we propose an ultra-thin bifunctional gel membrane fabricated via a gas-liquid interface-assisted soft spray technique. This method enables precise control over membrane thickness while preserving a nano-porous architecture, which synergistically enhances both permeability and selectivity. By incorporating graphene oxide (GO), the membrane exhibits exceptional photothermal properties, enabling efficient solar-driven evaporation of separated salt solutions. The proposed two-stage treatment strategy sequentially achieves dye/salt separation and desalination, ultimately yielding potable water. During filtration, the membrane demonstrates a high separation flux of 37.3 L·m −2 ·h −1 (0.1 MPa) with >99 % dye rejection, while maintaining low salt retention (<8 %), highlighting its potential for dye recovery from hypersaline wastewater. In the subsequent desalination phase, the gel-based evaporator achieves an evaporation rate of 1.76 kg·m −2 ·h −1 under one-sun irradiation (1 kW·m −2 ), coupled with excellent salt resistance. Notably, the membrane exhibits outstanding antibacterial performance and anti-fouling properties, maintaining stable operation over 50 cycles. This stepwise approach not only enables resource recovery but also enhances the sustainability of wastewater management through simultaneous dye reclamation and freshwater production.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Bowen Zhou,Juan Luo,Ruitao Li,Rongrong He,Tao He
Oxidation resistant nanofiltration (NF) membranes have been pursued for wide applications. Mostly researched NF membranes were based on interfacial polymerization (IP) technology, which is not stable in oxidative chemicals. In this paper, a novel layer-by-layer (LBL) self-assembled NF membrane prepared by coating poly(vinylbenzyltrimethylammonium chloride)/poly(styrene sulfonic) (PVBTMAC/PSS) on a polyethersulfone (PES) substrate was presented with exceptionally high permeance and oxidation resistance. The optimized NF membrane of [PVBTMAC/PSS] 8.5 demonstrated a pure water permeance (PWP) of 47.6 L/(m 2 ·h·bar) and nearly 100% rejection for various dyes. The PVBTMAC/PSS membrane showed distinct rejection to asymmetric salts (MgCl 2 , Na 2 SO 4 ) following Donnan exclusion. Excellent chlorine resistance was found after 150,000 ppm·h sodium hypochlorite treatment for both [PVBTMAC/PSS] 8.5 and [PVBTMAC/PSS] 9 , demonstrated by the stable rejection to MgSO 4 and prussian blue (PB) dye with reduced pore size. Declined rejection to MgCl 2 and increased rejection to Na 2 SO 4 was explained by oxidation of the highly active α-H on the aromatic ring side group of PVBTMAC to -COO − and Donnan exclusion effect. The integrity of LBL NF membranes was caused by additional π-π stacking between the polyelectrolytes. Both membranes demonstrated good long-term operational stability for dye separation with great potential for real applications.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Jingyu Du,Yu Xue,Yuhuan Xu,Xiao Zhan,Daohai Zhang
We have successfully developed a PVDF/EAA [poly(vinylidene fluoride)/poly(ethylene acrylic acid)]-piperazine (PIP) composite nanofiltration membrane for dye isolation. In this paper, we conduct interfacial polymerization (IP) on PVDF/EAA composite membranes to generate a separation layer that aims at enhancement of the permeation flux of nanofiltration membranes. Subsequently, Fourier transform infrared spectroscopy (FTIR), contact angle, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) were used to characterize the performance of the prepared samples. In addition, under the different concentrations of the PIP aqueous layer, an intensive study was resorted to gauge the effects of homotrimethylene tricarbonyl chloride (TMC) concentration and reaction time on the characteristics of nanofiltration membranes. Under the optimized situation, the pure water flux could reach 76.84 L/(m2 h) and the retention of bovine serum albumin (BSA), Congo red, and methylene blue could reach 96.34%, 97.93%, and 96.83%, respectively. Substantially, the nanofiltration membrane has good potential to be applied in dye wastewater treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）