npj Clean Water
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2024
·Vol. 7
·期 1
·1-10
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IF 10.4
Zhang Hongjie,Geng Wenjing,Cai Yifei,Huo Jiaqi,Zang Yipeng,Chen Cheng
Eliminating antibiotics from wastewater remains a critical challenge. This work introduces durable, high-performance adsorptive membranes formed by polymerizing tannic acid (TA) and Fe 3+ ions on commercial substrates, known as TA-Fe, to enhance antibiotic removal. Using a filtration process, the TA-Fe modified membrane (MCM) demonstrated excellent ciprofloxacin hydrochloride removal efficiency, permeance, and reusability. The MCM achieved high removal capability for antibiotics, with a permeance of 3815 L m −2 h −1 bar −1 and 96.7% removal efficiency within 1.3 min—115 times faster than traditional methods. Furthermore, the MCM sustained an impressive adsorptive capacity of 99.4% even after 10 consecutive cycles. This work profoundly progresses the domain of adsorptive membrane technology, offering a promising avenue for the sustainable adsorption and separation of antibiotics from contaminated wastewater.
研究领域:
环境科学
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材料科学
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水处理工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Ying Zhang,Feng Han,Dong Zou
The gas permeance and particle removal efficiency of silicon carbide (SiC) membranes are the most important performance indicators for high-temperature gas filtration. The rational design of SiC membrane microstructure has a positive impact on the improvement of performance indicators. This work prepared SiC membranes modified by in situ grown mullite whiskers, optimized their preparation conditions and investigated their performance improvement. The membrane suspension composition and sintering temperature were optimized using Taguchi’s method and gas permeance as the target. The thickness of the membrane was regulated by adjusting the spraying cycles and solid content in membrane suspension. Results showed that best membrane performance was obtained when the content of sintering aids, MoO 3, and AlF 3 ·3H 2 O were 8, 12, and 12 wt%, respectively; the solid concentration in membrane suspension was 30 wt%; the number of spraying cycles was 2, and the temperature was 1350 °C. The resulting membrane obtained a pore size of 5.8 µm and the Darcy's permeability coefficient k was 8.58 × 10 −12 m 2 . It also had good interfacial adhesion and thermal shock and corrosion resistances. The membrane achieved a PM 2.5 removal rate of more than 99.9 % at room temperature and high temperatures (100 °C–400 °C) with a low pressure drop below 1.4 kPa. Overall, the SiC ceramic membranes are prospective candidates for dust-laden gas filtration at high temperatures.
研究领域:
材料科学
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环境工程
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Yongjiang Shan,Mingliang He,Fei Zhang,Yingdong Yang,Yifei Wang,Tian Gui,Yuqin Li,Zhipeng Wang,Xiangshu Chen
The deployment of green hydrogen energy plays a pivotal role in propelling sustainable development and achieving carbon neutrality. Separating H2 and CH4 is a crucial step in industrial hydrogen purification. Metal–organic framework (MOF) membranes offer vast prospects for applications in gas separation. Breaking the “trade-off” between permeance and selectivity has consistently remained a primary challenge in the realm of separation membranes. In this work, highly permeable H2 separation ZIF-8 membranes were fabricated on a vertical graphene (VG)-modified α-Al2O3 support (VG@α-Al2O3), and the VG layer can afford active sites for synthesizing ZIF-8 membranes and provide more gas transport path to reduce the mass transfer resistance. With the aid of O2 plasma in improving the hydrophilicity of the VG layer, nano-ZIF-8 crystals can be synthesized on the VG to act as seeds (ZIF-8@VG@α-Al2O3) for membrane synthesis, and green synthesis membranes were realized in aqueous solution. At 90 °C for 12 h, about 900 nm-thick membrane layers were synthesized, with a high H2 permeance of 1.8 × 10–6 mol·m–2·s–1·Pa–1 and H2/CH4 separation factor of 9.6. After the synthesis period was increased to 24 h, the denser ZIF-8 membrane resulted in a higher H2/CH4 selectivity (17.2). In contrast to the MOF membranes described in previous studies, satisfactory hydrogen permeance of ZIF-8 membranes can be achieved while maintaining high selectivity.
研究领域:
材料科学
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膜分离技术
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纳米材料
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能源化学
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
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IF 10.53
Rui Zhao,Shubo Hao,Zheyuan Guo,Li Cao,Baoyin Li,Yutao Liu,Yanxiong Ren,Bart Van der Bruggen,Hong Wu,Zhongyi Jiang
Two-dimensional (2D) membranes with interlayer nanochannels hold great promise for CO 2 capture. However, the permeance is often limited by the high transmembrane resistance primarily caused by the tortuous interlayer diffusion pathway. Here, a facile method for preparing 2D porous vermiculite (PVMT) membranes is presented to boost CO 2 transport by increasing the number of additional through-plane channels. The pristine vermiculite (VMT) nanosheets were treated with acid etching to generate nanopores by dissolving metal cations thereon. The resulting porous nanosheets were co-assembled with polyethyleneimine (PEI) molecules by vacuum-assisted self-assembly to fabricate PVMT-PEI membranes. The PEI molecules regulate the channel size to elevate the diffusion of CO 2 and their amino groups afford affinity toward CO 2 to increase its dissolution, thus intensifying the facilitated transport mechanism. The optimized PVMT-PEI membrane shows high performance with CO 2 permeance of 568 GPU and CO 2 /CH 4 selectivity of 27.6, which is 165% and 94% higher than pristine VMT membrane. In addition, the PVMT-PEI membranes exhibit good long-term operation stability.
研究领域:
材料科学
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环境科学
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2025
·Vol. 92
·期 7
·1050-1062
·
IF 2.6
Yang Ruochen,Zhang Xue,Li Fuzhi,Zhao Xuan
View large Download slide View large Download slide Close modal The effects of two post-treatments with CaCl 2 and NaOH on nanofiltration (NF) membranes were investigated according to the physicochemical properties and antifouling performance. The membrane post-treated with NaOH (NF-OH − ) exhibited enhanced hydrophilicity and greater negative surface charge, accompanied by collapsed nodular structures. Compared with the pristine NF membrane, NF-OH − demonstrated a 50% increase in permeance, but showed compromised separation performance, with SO 4 2 − rejection of 97.3% and Cl − / SO 4 2 − separation factor of 46. In contrast, the CaCl 2 -treated membrane (NF-Ca 2+ ) displayed improved hydrophilicity with reduced negative charge and denser nodular morphology. While NF-Ca 2+ achieved 25% higher permeance than the pristine membrane, it maintained comparable SO 4 2 − rejection and Cl − / SO 4 2 − separation factor. Fouling experiments using biological treatment effluent of leachate revealed that NF-OH − showed greater fouling propensity and lower cleanability than the other two membranes. This is likely due to the stronger negative charge and smoother surface morphology of the NF-OH − membrane, which promoted foulant adhesion while limiting surface turbulence. Conversely, the NF-Ca 2+ membrane demonstrated superior antifouling characteristics and higher permeance recovery, attributable to its reduced negative surface charge and denser nodular morphology. These findings underscore the critical influence of surface charge and nanostructure on the filtration and antifouling behavior of NF membrane. Permeance of nanofiltration (NF) membranes increased by 26–50% after post-treatments. Surface nodulars increased on NF-Ca 2+ , but collapsed on NF-OH − . NF-Ca 2+ became less negatively charged, while NF-OH − became more negatively charged. NF-OH − was more prone to fouling and harder to recover during fouling tests. Surface charge and morphology changes significantly impact membrane performance.
研究领域:
膜科学
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水处理技术
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分离过程
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Jianhang Qiu,Heguo Han,Zheng Liu,Linjian Sang,Jian Han,Lei Dai,Yuxuan Sun,Shenghai Li,Suobo Zhang
Polyurethane-polyester nanofiltration membranes were prepared by interfacial polymerization. • The NF membrane shows over 98.5% rejection of MgCl 2 at pH 7 and membrane water permeability can reach 15 L m −2 h −1 ·bar −1 . • The membranes exhibit excellent acid stability in 20 wt% sulfuric acid solution. • DFT calculations confirm superior stability of urethane and ester groups over amide. Developing acid-resistant nanofiltration (NF) membranes that combine high permeability with long-term stability remains a critical challenge in hydrometallurgical wastewater treatment. Herein, we report a novel molecular design strategy involving Mannich reactions and quaternization to develop quaternary ammonium functionalized monomers. These monomers exhibit excellent water solubility, which exhibit exceptional aqueous solubility under alkali-free conditions. These monomers were then reacted with 3,5-diisocyanatobenzoyl chloride (DBC) via interfacial polymerization to fabricate a polyurethane-polyester composite nanofiltration membrane. The optimized membrane achieved a MgCl 2 rejection of over 98.5% and a water permeance of 15 L m −2 h −1 ·bar −1 under neutral conditions, achieving an effective balance between permeability and selectivity. Acid durability tests demonstrated that the membrane retained > 93% of its MgCl 2 rejection after 100 days of immersion in 20 wt% H 2 SO 4 . Furthermore, continuous operation in simulated industrial acidic wastewater (1 wt% H 2 SO 4 containing Fe 3+ , Cu 2+ ) for 500 h revealed no significant rejection decline, confirming its stability under complex conditions. Density functional theory (DFT) calculations were performed to provide a molecular-level mechanistic understanding of the exceptional acid stability exhibited by the polyurethane–polyester NF membranes. The proposed composite membrane design strategy, which combines hydrophilic functional groups with acid-resistant aromatic networks, provides a novel solution for efficient treatment of wet-process metallurgical wastewater. Download: Download high-res image (332KB) Download: Download full-size image
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Siheng Zhao,Xiaoqi Ma,Shengchao Zhao,Kuo Chen,Jianquan Peng,Ping Hu,Bingbing Yuan,Q. Jason Niu
An acid-triggered dynamic interlayer regulates interfacial polymerization. • A Schiff base interlayer serves as a controllable m -phenylenediamine reservoir. • Generated hydrochloric acid triggers imine hydrolysis and monomer release. • A wrinkled polyamide layer with abundant internal nanovoids is formed. • The membrane shows 2.6-fold higher permeance with 99.2% NaCl rejection. Reverse osmosis (RO) membranes are widely used in seawater desalination, brackish water desalination, and water reuse. However, their performance remains constrained by the intrinsic permeance-selectivity trade-off of conventional polyamide membranes. Herein, we present an acid-triggered dynamic interlayer strategy for regulating interfacial polymerization to fabricate RO membranes with high water permeance. A sacrificial Schiff-base interlayer was constructed by sequential deposition of 2,4,6-triformylphloroglucinol (Tp) on a polysulfone substrate, followed by reaction with m -phenylenediamine (MPD), thereby forming a dynamic imine network that served as an MPD reservoir. Upon contact with 1,3,5-benzenetricarbonyl trichloride, interfacial polymerization was initiated, during which HCl generated in situ catalyzed the hydrolysis of imine bonds and triggered localized release of MPD. This dynamic process perturbs the reaction-diffusion balance and promotes the formation of a highly crumpled polyamide layer with enlarged internal nanovoids, accompanied by an increase in surface roughness from 43.1 to 70.7 nm. As a result, the optimized membrane achieves a water permeance of 4.1 L m −2 h −1 bar −1 , representing a 2.6-fold increase over the pristine membrane, while maintaining a high NaCl rejection of 99.2%. Simulated acid-etching and triethylamine inhibition experiments further verify the critical role of the acid-triggered process in membrane structural evolution. Moreover, replacing Tp with 1,3,5-benzenetricarboxaldehyde produces similar morphological changes and performance enhancement, highlighting the generality of this strategy. This work establishes an effective approach for modulating polyamide growth through dynamic interlayer engineering and offers a promising route toward high-performance RO membranes for efficient water treatment. Download: Download high-res image (359KB) Download: Download full-size image
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Rouwen Shen,Yu Li,Sufen Jiang,Aimei Zhu,Qinglin Liu,Qiugen Zhang
Constructing polyamide (PA) separation layers from rigid, three-dimensionally twisted aromatic diamine monomers is a promising route toward high-permeance organic solvent nanofiltration (OSN) membranes. However, the poor water solubility of such monomers limits their application in conventional aqueous interfacial polymerization (IP). Herein, water/DMF cosolvent assisted interfacial polymerization strategy was adopted to address this bottleneck. The poorly water-soluble 2,2-bis(4-aminophenyl) hexafluoropropane (BAHFP) monomer can solve in water/DMF co-solvent and get controlled monomer diffusion and IP kinetics to form an ultra-thin, defect-free polyamide active layer. The introduction of DMF enhances the solubility of BAHFP with three-dimensional twisted configuration. A minor quantity of 50 wt% N , N -dimethylformamide (DMF) was introduced into the water as a cosolvent, facilitating the formation of a continuous polyamide (PA) layer with a thickness of 85.7 ± 3.5 nm on the surface of the composite membrane. Additionally, the membrane prepared at the optimal DMF concentration of 60% exhibited the continuous and complete PA film and a methanol permeability of 28.3 ± 0.4 L m −2 h −1 bar −1 and 98.7 ± 0.3% rejection of RB for 30 h. The smoother top surface significantly improves the membrane's anti-fouling properties. This work offers an effective way for the fabrication of high permeance BAHFP-PA membrane through IP process.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Changsheng Guo,Yanli Zhao,Zhaoyi Zhang,Zhichen Liang,Hui Yu,Yao Qian,Qi Zuo,Pengbi Liu,Mengchen Zhang,Zhiwei Xu,Xianhua Zeng
Traditional loose nanofiltration (LNF) membranes show great advantages in dyeing wastewater treatment, however, their applications are limited by the “trade-off” effect. β-Cyclodextrins (β-CD) demonstrate excellent hydrophilicity and hydraulic conductivity owing to the existence of the hydrophilic ends and hydrophobic inner lumen. This study reports an LNF membrane with outstanding permeance and dye rejection capabilities achieved through the immobilization of β-CD within the pores of the substrate membrane via the thermal shrinkage of sulfonated polysulfone and the electrostatic synergy of polydopamine. The introduction of β-CD and PDA changed the surface potential, hydrophilicity, and pore structure of the membrane. Furthermore, it displays specific recognition with dyes, thereby further enhancing both permeance and rejection rates. As anticipated, both permeance and dye rejection (Methylene Blue) increased to remarkable levels, reaching up to 225 L·m −2 ·h −1 ·bar −1 and 97.8 %, respectively. These values far exceeded those achieved by conventional polymeric NF membranes or hybrid NF membranes. Besides, the permance and dye rejection didn't change much with the increase of the dye feed concentration, salt concentrations or under different pH conditions. Furthermore, both permeance and rejection rates remained stable during the cyclic filtration tests, with stability further enhanced in deionized water at 40 °C. These findings highlight the potential of strategies aimed at modifying membrane pore transport channels for applications in dye separation, particularly in treating printing and dyeing wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chunyu Jiang,Xinliang Zhang,Lvbin Cao,Guangming Ma,Xueting Zhao,Jiefeng Pan
Polyamide membranes prepared through interfacial polymerization (IP) hold substantial promise for nanofiltration applications. Nevertheless, the problems of uneven accumulation of aqueous monomers at the interface and uncontrollable rapid reaction rates usually lead to the non-uniform distribution of pore sizes and a relatively large thickness of the polyamide separation layer, thereby limiting the comprehensive separation performance of nanofiltration membranes. Modification of the diffusion–reaction process during IP can effectively regulate the structure and performance of the polyamide separation layer. In this work, we put forward a novel nanocolloidal-confined IP method for preparing polyamide membranes by incorporating piperazine (PIP)-based nanocolloidals to regulate the diffusion and distribution of aqueous-phase amine monomers. Firstly, the PIP-based nanocolloidals are pre-synthesized via the reversible reaction between PIP and 2,4,6-Triformylphloroglucinol (TP). Subsequently, these nanocolloidals are accumulated on the polyacrylonitrile (PAN) membrane to facilitate the subsequent interfacial polymerization with trimesoyl chloride (TMC). During this process, TP functions as a PIP coupling agent, ensuring the uniform distribution and enrichment of PIP at the interface. Moreover, it also serves as a PIP sustained-release agent (through the reversible decomposition of oligomers) to control the diffusion–reaction rate of the interfacial polymerization. The nanofiltration membrane thus prepared exhibits a polyamide separation layer that is characterized by fewer defects, a loose structure, and an ultrathin nature. It achieves a high permeance of 34.13 L m −2 h −1 bar −1 (nearly four times the increase compared to conventional membranes) and a high sulfate rejection rate of approximately 98.6 %. Additionally, due to the stable pore structure of the polyamide separation layer, the nanofiltration membrane demonstrates durable separation performance. The membrane was applied to 30 h continuous nanofiltration at an operating pressure of 4 bar, while the rejection rate only experienced a slight decline yielding a high level above 95 %. This work offers a promising solution for the development of high-performance membranes customized for wastewater desalination, fulfilling a crucial requirement in the field of seawater desalination.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
Small
·
2024
·
IF 13
Xue Hu,Zhiying Li,Jianbo Li,Chuanlong Jin,Junjiang Bao,Xiaopeng Zhang,Xiaobin Jiang,Ning Zhang,Gaohong He
Membrane technology exhibits low cost and high efficiency in gas separation. Zeolite-imidazole framework-67 (ZIF-67) membrane shows a theoretically superior performance in H 2 /CO 2 separation, owing to its effective size-sieving pores between H 2 and CO 2 . However, the gas molecules are permeate through a series of consecutive crystal cells of common ZIF-67 polycrystalline membranes, resulting in high transport resistance to the gas permselective transport. To this end, this work employs a contra-diffusion synthesis to construct a honeycomb ZIF-67 (h-ZIF67) crystalline membrane for low-resistance H 2 /CO 2 permselective transport. The controlled growth of h-ZIF67 following the van der Drift theory produces the honeycomb polycrystal with hierarchical channels for low-resistance gas permeation. The prepared membrane with micron-scale thickness still achieves a H 2 permeance as high as 1.6 × 10 −7 mol m −2 s −1 Pa −1 and a H 2 /CO 2 selectivity of 17, which can be maintained after a long-term operation for the H 2 /CO 2 mixture separation.
研究领域:
材料科学
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化学工程
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气体分离技术
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DOI
PubMed
高影响因子
Membranes
·
2018
·Vol. 8
·期 4
·89
·
IF 0
Qin Liu,Xing Wu,Kaisong Zhang
To improve the filtration performance and properties of organic solvent nanofiltration (OSN) membranes, we firstly introduce nanoporous silica (SiO2) particles into the polyamide (PA) active layer of polysulfone (PSf) membrane via an interfacial polymerization process. Results from the study revealed that introduction of SiO2influenced the properties of PSf/PA-SiO2composite membranes by changing the surface roughness and hydrophilicity. Moreover, results also indicated that nanoporous SiO2modified membranes showed an improved performance of alcohols solvent permeance. The PSf/PA-SiO2composite membrane modified by 0.025 wt % of SiO2reached a permeance of 3.29 L m−2h−1bar−1for methanol and 0.42 L m−2h−1bar−1for ethanol, which were 20.0% and 13.5% higher than the control PSf membrane (permeance of 2.74 L m−2h−1bar−1for methanol and 0.37 L m−2h−1bar−1for ethanol). Conclusively, we demonstrated that the increase of membrane hydrophilicity and roughness were major factors contributing to the improved alcohols solvent permeance of the membranes.Keywords:silica;polysulfone;composite membrane;polyamide
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
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