SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yucheng Liu,Qian Xu,Fuping Li,Fan Yu,Zijian Yu,Kaibo Hu,Hao Chen,Xuewei Li,Chonggang Wang,Dong Han Seo,Ming Xie,Sotto Arcadio,Jiuyang Lin,Youming Yang,Yinhua Wan
Rare earth elements (REEs) are commonly categorized into light (LREEs), medium (MREEs), and heavy (HREEs) groups. Separation between LREEs and MREEs or MREEs is relatively straightforward. However, isolating LREEs themselves is particularly challenging because of their similar ionic radii and identical charges. Traditional separation processes are hindered by drawbacks including low recovery rates for dilute REEs, poor selectivity, complex protocols, and environmental pollution. Consequently, developing a cleaner and more efficient method for LREEs separation is imperative. In this study, we employed a single-module hollow fiber supported liquid membrane (HFSLM) system with 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (P507) as an extractant to concurrently extract and strip La 3+ and Nd 3+ from the mixed LREEs containing solutions. We also investigated the impact of flow rate, stripping solution acidity, feed solution pH, P507 concentration, Nd 3+ concentration of feed solution, and the volume ratio between the feed and stripping solutions influence the extraction and stripping of LREEs, as well as the molar fractions of La 3+ and Nd 3+ in the solutions. Under optimal condition, the molar fraction of La 3+ was 99.0% in the feed solution, whereas the molar fraction of Nd 3+ reached 91.6% in the stripping solution. Furthermore, the experimental results demonstrated a consistent preference of P507-HFSLM system for extracting Nd 3+ over La 3+ , and the underlying mechanism was thoroughly investigated. In summary, this study offers comprehensive insights and technical approaches for selective separation and purification of LREEs.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2022
·
IF 8.634
Zhuoheng Tu,Ping Zhang,Mingzhen Shi,Xiaomin Zhang,Youting Wu,Xingbang Hu
Efficient recovery of CO and H 2 from offgas streams is environmentally and economically meaningful from the view point of the wide use of syngas (CO/H 2 ) in the chemical industry. This work reports selective and simultaneous separation of CO and H 2 from N 2 using protic chlorocuprate ionic liquids (PCILs)-based membranes. The chemical structures of the prepared PCILs were characterized using FTIR , NMR and ESI-MS, and the thermal stability, melting points, viscosity and density of PCILs were determined. The morphology and elemental distribution of PCIL-based membranes were characterized by SEM and EDS. Facilitated transport of CO is observed in these membranes, and the CO permeability is up to 178.3 barrers (0.1 bar, 40 °C) in [TEAH][CuCl 2 ], with a CO/N 2 selectivity of 26.2. H 2 permeability and H 2 /N 2 selectivity are also found to reach 198.2 barrers (0.5 bar, 40 °C) and 29.1, respectively. The permeability of CO and the selectivity of CO/N 2 can be further optimized to 405.9 barrers and 69.9 by altering the Cu(I) content, respectively. In addition, the selectivity of CO/H 2 can be tuned drastically via varying the Cu(I) content (from 0.77 to 12.0) and the operating temperature (from 2.14 to 0.42), which may be applied to the composition adjustment of syngas. In a word, this work offers a new strategy for designing IL-based membranes that used for CO and H 2 capture.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Fangge Chen,Yanhong Li,Aisheng Huang
Because of the increase of industrial wastewater containing insoluble oil and oil discharged accidents, oil/water separation has turned out an exceedingly crucial and urgent issue in environmental protection. Therefore, it is terribly significant to develop a simple and effective technology for oil/water separation. Membrane separation has been well known as a promising method to remove oils from water due to its energy-efficiency and cost-effectiveness. In the present work, we report the synthesis of a hydrophobic zeolite FAU named F-FAU through a simple and effective post-synthetic modification. Firstly, a thin zeolite FAU layer is grown on the 3-aminopropyltriethoxysilane (APTES) modified stainless steel net (SSN) to form SSN supported FAU (SSN@FAU) coating. And then, a hydrophobic SSN@F-FAU coating is prepared through post modification of SSN@FAU coating with perfluorooctyltriethoxysilane (POTS). After POTS modification, the water contact angle (CA) of the SSN@FAU coating increases from 15° to 132° for SSN@F-FAU coating, while both morphology and structure of the SSN@FAU coating keep unchangeable. Attributing to the high hydrophobicity of the F-FAU coating, the SSN@F-FAU coating shows a wonderful oil/water separation performance, with oil/water separation efficiency of above 98.8 % and oil flux of up 50,000 L m −2 h -1 . After 50 cycles successive separation of hexane/water mixture, the separation efficiency of the SSN@F-FAU coating keeps constant (over 99.1 %), showing potential application for oil/water separation in industries. Further, hydrophobic SSN@F-LTA coating can be consistently prepared through post modification of SSN@LTA coating with POTS, and also shows a high oil/water separation performance, with oil/water separation efficiency above 99.0 % and oil flux over 40,000 L m −2 h -1 , confirming the universality of the preparation strategy.
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
ACS Nano
·
2022
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IF 18.027
Youyu Jia,Feng Shi,Hongying Li,Zhikun Yan,Jiwei Xu,Jiale Gao,Xiaoli Wu,Yifan Li,Jingtao Wang,Bing Zhang
Two-dimensional (2D) lamellar membranes, with highly ordered nanochannels between the adjacent layers, have revealed potential application prospects in various fields. To separate gases with similar kinetic diameters, intercalation of a functional liquid, especially an ionic liquid (IL), into 2D lamellar membranes is proved to be an efficient method due to the capacity of imparting solubility-based separation and sealing undesired defects. Stable immobilization of a high content of liquid is challenging but extremely required to achieve and maintain high separation performance. Herein, we describe the intercalation of a typical IL, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), into the ionized nanochannels of sulfonated MXene lamellar membranes, where the sulfonate groups are anchored onto MXene nanosheets through a facile method based on metal-catechol chelating chemistry. Thanks to the intrinsic benefits of MXene as building blocks and the decorated sulfonate groups, the optimal membrane possesses adequate interlayer spacing (∼1.8 nm) and high IL uptake (∼47 wt %) and therefore presents a CO2 permeance of 519 GPU and a CO2/N2 selectivity of 210, outperforming the previously reported liquid-immobilized lamellar membranes. Moreover, the IL loss rate of the membrane within 7 days at elevated pressure (5 bar) is measured to be significantly decreased (from 43.2 to 9.0 wt %) after growing sulfonate groups on the nanochannel walls, demonstrating the excellent IL storage stability.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Junyang Zhang,Haijian Tong,Wenkai Pei,Wenhua Liu,Fengyan Shi,Yan Li,Yuning Huo
A synergistic system of integrated photocatalysis-adsorption-membrane separation in a rotating reactor was designed. The composite membrane was prepared via filtration process under vacuum, and it was composed of graphene oxide (GO) acted as the separation membrane, activated carbon (AC) as the adsorbent and Ag@BiOBr as the photocatalyst, respectively. In this Ag@BiOBr/AC/GO membrane system, rotation of the membrane could avoid the light-shielding effect from organic color pollutants to achieve the complete removal of pollutants. More importantly, the synergistic effect among photocatalysis , adsorption and membrane separation in rotating reactor was significant for the efficient removal of rhodamine B (RhB). In the Ag@BiOBr/AC/GO composite membrane, GO membrane layer could reject the organic molecular by the assistance of AC layer with efficient adsorption capacity, and Ag@BiOBr at outer layer could photodegrade the organics under visible light irradiation. The photocatalysis process could solve the problem of membrane fouling and adsorption could assist GO membrane for stopping the permeation of pollutants. Meanwhile, GO membrane was not only beneficial for catalyst recovery, but also could concentrate the pollutants via the membrane separation to accelerate the photocatalytic degradation . At the same time, both the photocatalysis degradation and membrane separation could promote the adsorption ability of AC. This synergistic system showed the significant potential for the practical application in the future.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Food Science & Nutrition
·
2024
·Vol. 12
·期 12
·10933-10945
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IF 3.5
Wen-Tao Chen,Jing Sun,Ying-Yang Zhang,Ying Xu,Ping Zou,Jian-Gang Hu,Lei Zhou
This comprehensive study focused on evaluating and selecting seven distinct commercial membranes to develop BTESE/PA membranes. This method effectively facilitated the extraction of cynaroside from the complex composition of peony seed meal. We subsequently conducted a thorough investigation into its biological properties. These findings establish a robust foundation for future research and the development of related products. The peak concentration achieved by peony seed meal filtration (PSMF) was 234.84 ± 1.17 μg/mL. Among the commercial membranes evaluated, the PA membrane exhibited superior separation capabilities, leading to its selection for BTESE loading. Compared with BTESE treated with HCl and NH 3 , the HCl variant, once incorporated into the BTESE/PA membrane, enhanced cynaroside separation, achieving an impressive 90.23% recovery rate. A comprehensive investigation of the biological effects of cynaroside revealed its crucial antioxidant role, especially in SOD binding. Additionally, cynaroside has the potential to induce apoptosis in K562 cells through interactions with BCL-2 and CDK-2 enzymes. Pharmacophore screening revealed the affinity of cynaroside for the PDE5A, TNKS2, and DAPK1 proteins, suggesting that it has diverse potential applications.
研究领域:
植物化学
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药理学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2019
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IF 10.159
Xiaoxiao Wang,Lizhu Chen,Zhaogang Teng,Zhi-Fei Wang
Mesoporous thin films have been attracting considerable attention due to their potential application in membrane separation technology. However, how to prepare robust mesoporous silica films on a large scale using simple method still remains a great challenge. In this paper, for the first time, we report a facile and novel approach to fabricate layered mesoporous silica thin membrane using mesoporous organosilica nanosheets (mOSiO2 NSs) as the building block, which are prepared by combining template growth and selective etching. Transmission electron microscopy characterization displays that the resulting mOSiO2 NSs possess a large aspect ratio, a controllable thickness (16–27 nm), and a uniform tunable pore size (4–24 nm) by adjusting the reaction conditions. Owing to the large lateral dimension of the nanosheets, the as-prepared mOSiO2 NSs can be easily stacked into a highly packed and oriented membrane via the vacuum filtration. The results show that the nanofilter device based on such mOSiO2 NSs can successfully separate ovalbumin/cytochrome c (OVA/cyt c) or Ag/Au nanoparticles with different sizes, which provides a new strategy for nanosize separation.
研究领域:
材料科学
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生物学
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化学工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
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IF 8.1
Qiong Yang,Jianjian Wei,Yili Chen,Zhourui Xu,Dehua Ma,Min Zheng,Jiansheng Li
The application of nano-catalysts in improving the ozonation removal efficiency for refractory organic compounds has been extensively investigated. However, cost-effective nano-catalysts separation remains a challenge. In this study, membrane separation processes were employed to separate nano-MgO catalysts from an ozonation system. A continuous nano-catalytic ozonation membrane separation (nCOMS) coupling system was successfully constructed for treating quinoline. The results showed that long hydraulic retention time (HRT) and high nano-MgO dosage could improve the quinolone removal efficiency but shorten operation cycles. At the optimal operation conditions of HRT = 4 h and nano-MgO dosage = 0.2 g/L, the nCOMS system achieved a stable quinoline removal efficiency of 85.2% for 240 min running with a transmembrane pressure lower than 10 kPa. The quinoline removal efficiency contribution for ozonation, catalysis and membrane separation was 57.1%, 24.9% and 18.0%, respectively. Compared to ozonation membrane separation system, the fouling rate index of the nCOMS system increased by 60% under optimal conditions, but the irreversible fouling was reduced to 28%. In addition, the nCOMS system exhibited reduced adverse effects of coexisting natural organic matter (NOM) on quinoline removal and membrane fouling . In conclusion, the nCOMS system demonstrated higher quinoline removal efficiency, lower irreversible fouling, and reduced adverse effect of coexisting NOM, thereby signifying its potential for practical applications in advanced treatment of industrial wastewater.
研究领域:
环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xingyu Zhang,Lin Chen,Longjie Jiang,Liang Zhu,Chuqing Cao,Wei Zhang,Linting Zhao,Jiaqi Xu,Han Liu
In the advent of the new energy era, the global demand for lithium is increasing rapidly. The recovery of Li + and Co 2+ from the leachate of high-quality spent lithium-ion batteries (LIBs) offers significant economic and environmental benefits. This study proposes a TFC-ON-MOF membrane prepared through a combination of in situ growth and interfacial polymerization (IP) for the recovery of Co 2+ and Li + from battery leachate. Operated in an electrodialysis (ED) system, the experimental results demonstrated that the optimum Li + membrane flux was observed to reach 1.02 μmol cm −2 min −1 at 7.5 mA cm −2 , with the selectivity remaining at 19.84, which exemplifies well-separation and permeation performance. Following several operational cycles, the separation performance remained stable, and the membrane exhibited enhanced fouling resistance relative to commercial monovalent selective cation exchange membranes (CSO). The composite membrane features sub-nanometer windows and nanometer-sized cavities, enabling selective permeation of Li + while simultaneously sequestering Co 2+ . The inclusion of auxiliary permeation groups (PSS) also enhances overall permeation performance and selectivity. The findings contribute to the design of composite metal–organic frameworks and provide a novel approach for the selective separation of heavy metal ions from spent lithium batteries, thereby promoting the efficient recycling of valuable metal resources.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
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IF 5.778
Chao Wu,Xiaoping Wang,Tongren Zhu,Pan Li,Shengji Xia
With the increasing demand of high water-quality, membrane filtration technologies are playing further important roles in water treatment owing to their small footprints, reduced use of chemicals and stable performances. However, the inherent permeability-selectivity trade-off is still a significant obstacle restricting the broad applications of membrane separation. Hydrophilic modification via doping nanoparticles into membranes is considered an effective solution to improve the permeability while maintaining selectivity . However, agglomeration of nanoparticles often results in inhomogeneity of the modified membranes. In this study, hybrid membranes with separated covalent organic framework (COF) particles that were uniformly embedded in the membrane surface pores were firstly fabricated via acetic-acid-catalyzed in situ synthesis . Owing to the ample hydrophilic chemical groups and tunable molecular transport channels in COFs, the modified membranes yielded almost twice higher water flux (about 200 L m −2 ·h −1 ·bar) than the pristine membranes with simultaneously enhanced rejection of water pollutants (i.e., dyes). In addition, the pure organic structure of COF improves the polymer-filler interaction of the mixed film, thereby reducing the risk of leakage . Therefore, the hybrid membranes also exhibited relatively high stability in long-term operations and different pH conditions, which makes them promising candidates in future membrane applications.
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
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Ruonan Zhang,Yanchao Xu,Liguo Shen,Renjie Li,Hongjun Lin
Efficient separation of oil-in-water emulsion remains a decisive step for success of oily wastewater treatment . To achieve this goal, a novel strategy regarding combining membrane separation with in situ electrocoagulation based on sacrificial anodes and cathodic hydrogen evolution via conductive metalized fabric membrane was proposed. As a key component of this novel coupling system, nickel functionalized fabric membrane with high hydrophilicity and electrical conductivity (electrical resistance of ∼2 Ω cm −1 ) was successfully prepared via a low-cost and facile route, including steps of PVA (polyvinyl alcohol)/Ni coating and autocatalytic electroless Ni plating. The optimized conductive membranes exhibited high permeate flux (19.3 × 10 5 L m −2 h −1 ·bar −1 ), separation efficiencies (99.5%), and separation stability to separate oil/water mixtures during the gravity-driven filtration process. To achieve the ideal performance to separate oil-in-water emulsion, a coupled electrocoagulation-membrane separation system was constructed with Ni@PVA membrane and Al mesh as the cathode and anode, respectively. It was shown that the coupled electrocoagulation-membrane separation system could achieve 99.4% rejection with high flux of 12.0 × 10 3 L m −2 h −1 ·bar −1 for oil/water emulsion separation, under the current density of 8 mA cm −2 and 20 min electrolysis time. This study revealed that the proposed electrocoagulation-membrane separation system based on Ni@PVA membrane is a promising technique in oil/water separation.
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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shuo Li,Wenyu Wu,Huaxin Ma,Zhao Zhang,Yu Gu,Jingjie Zhang,Ruijun Zhang
Graphene oxide (GO)-based membranes have attracted extensive attention in water purification but still face great challenge due to their poor service life. To overcome this issue, weakly oxidized graphene nanosheets have been chemically exfoliated from natural graphite via a newly-developed strategy for preparing layer-tunable graphene. When an 80 μm-thick graphene membrane is assembled from the graphene nanosheets with an average layer number of 3, it exhibits a high rejection rate of 99.9 % for Rhodamine B and a water flux of up to 3452.6 L m −2 h −1 bar −1 . This should be ascribed to the unique hierarchically nanochannel structure within the membrane. This finding may provide a new insight into the design and fabrication of the thick membrane having excellent sieving performance. Furthermore, the rejection rate of RB can be maintained at 99.9 % even after 24 cycles of filtrations, demonstrating a superior service performance for the membrane.
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）