SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Junlei Zheng,Lin Nie,Yukui Tong,Miaomiao Tian
Ribavirin (RBV) in food and environmental samples presents significant risks to human health, necessitating the development of methods capable of its simultaneous detection and adsorption. This study describes the preparation of a multi-functional molecularly imprinted material (Nylon@Eu-MOF@MIPs), achieved through in-situ growth of Eu-MOF with fluorescence properties on a nylon membrane, designed for the concurrent adsorption and detection of RBV. The material demonstrates high adsorption capacity for RBV (41.36 mg g −1 ), a pronounced imprinting effect (imprinting factor of 3.06), and substantial sensitivity (detection limit of 0.01 μM). Furthermore, following ten adsorption–desorption cycles, Nylon@Eu-MOF@MIPs retain effective adsorption capacity, with a minimal loss of 5.8 %. Additionally, a filtration-enhanced adsorption and detection mode is proposed, achieving a 1.63-fold increase in adsorption capacity compared to the traditional soaking method. The integrated platform developed in this study facilitates efficient adsorption and visual detection of RBV. This research not only advances membrane separation materials but also establishes foundational conditions for creating integrated systems for simultaneous adsorption and visual detection.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yun Wang,Dan Wang,Qixuan Mu,Yanke Zhai,Jun Hai,Yibing Ji,Ruijun Li
Laccase is utilized as green catalyst in the environmental catalysis. Nevertheless, the drawbacks such as poor stability and difficulty in recycling have seriously restricted its application. Here, we simulated the binding pocket and catalytic active site of nature laccase, and designed a laccase-mimicking nanozyme (named as GA-Cu and the average diameter was 600 nm) with high activity and stability by using Cu 2+ as the active center, 2-aminoimidazole as well as glutathione (GSH) as the ligand. Compared with natural laccase, the GA-Cu nanozymes showed excellent stability and reusability under extreme conditions. Furthermore, to overcome the problems of difficult recycling and easy secondary contamination, we innovatively proposed to load GA-Cu nanozymes onto nylon membranes (GA-Cu@CS/GA-Cu/nylon membranes) by vacuum-assisted filtration using chitosan (CS) as a binder to degrade tetracycline hydrochloride (TC) by filtration. Encouragingly, 50 mg/L of TC was almost completely removed by filtration once at 0.15 MPa pressure. The results have showed that the GA-Cu@CS/GA-Cu/nylon membrane removed TC mainly through degradation, and more than 80 % of TC was degraded through desorption experiments. Finally, some degradation products were identified by LC-MS and three possible degradation pathways were proposed. These findings demonstrate the potential of GA-Cu@CS/GA-Cu/nylon membrane for environmental remediation, and will be a general and important strategy for the design of membrane filters based on the excellent performance of nanozyme.
研究领域:
环境科学
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生物催化
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材料科学
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产品关联
DOI
高影响因子
SPECTROSCOPY LETTERS
·
2017
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IF 0.794
Heyue Wei,Hui Li,Ping Liu,Xin Tao,Changchun Fan,Long Li,Ruoqiu Zhang,Yiping Du
A simple, rapid, sensitive, and selective method was proposed to detect phosgene by solid-phase extraction coupled with ultraviolent diffuse reflectance spectroscopy. First, phosgene reacts with aniline solution to produce N,N′-diphenylcarbamide, then nylon membrane was selected as solid-phase material to enrich N,N′-diphenylcarbamide and separate it from mixture solution. At last, nylon membrane-concentrated N,N′-diphenylcarbamide was measured directly to collect ultraviolent diffuse reflectance spectrum without any elution. Some parameters such as membrane pore, vacuum degree, and volume of sample were optimized. Under the optimal conditions, the relationship between the mass x of phosgene and absorbance y at 257 nm was described in a linear equation of y = 0.0141x + 0.0025 with a squared correlation coefficient of 0.9920, the limit of detection of phosgene was estimated as low as 0.2466 µg. The developed method was evaluated by applying to detect phosgene content in real samples and comparing with aniline in ultraviolet spectrophotometric method, which is adopted by the standard method of China. The relative errors of two methods were between −7.03% and 3.60%, and the relative standard deviations were from 6.55% to 9.31%, which are comparable to the standard method and verified the feasibility of the current method. These results demonstrated that the proposed method could be applied to the detection of phosgene with good accuracy and precision.
研究领域:
分析化学
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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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2022
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IF 5.518
Feng Shijie,Zhao Jiefeng,Gao Yunling,Yun Junxian
A superhydrophilic/underwater superoleophobic CaCO 3 @PDA@nylon nanocomposite membrane was prepared by a simple dip-coating method using a nylon 66 membrane in dopamine and nano CaCO 3 particle aqueous solutions. The prepared CaCO 3 @PDA@nylon membrane was characterized by SEM, EDS , FTIR, and XPS . The underwater oil contact angle reached 159.7°. The modified membrane showed highly efficient oil-in-water emulsion separation performance for various viscous oils or organic solvents over a wide range from 126.8 to 6029.6 nm. Furthermore, the CaCO 3 @PDA@nylon membrane also demonstrated high permeation flux and good regeneration ability. Even with continuous reuse of 15 cycles, the flux was still high, e.g., 517.3 L m −2 h −1 for chloroform-in-water emulsions with an average particle size of 126.8 nm. The modified membrane's possible oil-in-water emulsion separation mechanism was obtained by combining fluorescence-assisted dripping, continuous filtration, and emulsion contact angle experiments. This work might provide a simple and environmentally friendly membrane modification method for general separation studies of high oil concentration oil-in-water emulsions. The simple preparation process and efficient and fast separation ability highlight its great potential in large-scale production and oily wastewater treatment .
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
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 11
·1640-1649
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IF 4.776
M. Kamran Khan,Jianquan Luo,Zhaoshuai Wang,Rashid Khan,Xiangrong Chen,Yinhua Wan
Alginate dialdehyde (ADA), a biocompatible polymer, was used as an intermediate layer on a nylon membrane to readily fabricate cation exchange (CEX), metal-affinity (Me-affinity), histidine-affinity (His-affinity) and peptide-affinity (Pep-affinity) membrane adsorbers without any organic solvent usage. All the membrane adsorbers exhibited a high selectivity in the fractionation of a IgG (immunoglobulin)/HSA (human serum albumin) mixture. Along with a high purity of 100%, a high IgG binding capacity of 30, 24, 21 and 28 mg mL−1 (membrane volume) was achieved by the CEX, Me-affinity, His-affinity and Pep-affinity membrane adsorbers in flow-through mode respectively, which is superior to those of the reported membrane adsorbers. Furthermore, the CEX and Pep-affinity adsorbers were tested for the separation of IgG from human plasma solution. The carboxylic groups along with the peptides on the Pep-affinity adsorber captured IgG synergistically with a higher recovery and purity (99% and 98.6%). This synergetic adsorber showed a qmax and dynamic binding capacity (DBC) of 138.4 and 38.7 mg mL−1 respectively for IgG binding which was somewhat higher than that of the reported protein A agarose (having qmax and DBC of 84 and 24.4 mg g−1 respectively). The present work indicated that the ADA layer not only activated the membrane surface to attach various adsorptive ligands under mild conditions, but also reduced non-specific adsorption. Due to the versatile linking function and green reaction conditions, the ADA coating on the nylon membrane is promising for the preparation of diverse membrane adsorbers.
研究领域:
生物工程
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材料科学
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分离技术
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
FENG Shijie,ZHAO Jiefeng,ZHANG Pengyu,GAO Yunling,Yun Junxian
Environmentally friendly separation materials are essential for separating emulsified oil-water mixtures. The nylon membrane has been facilely converted into highly hydrophilic and underwater superoleophobic via a simple one-step co-deposition of polydopamine and chitosan-tripolyphosphate (CS-TPP) nanoparticles , wherein the CS-TPP particles were prepared by the ion gel method. The modified membrane exhibited excellent antifouling performance with the underwater oil contact Angle (UOCA) at 179.6°. The prepared environmental CS-TPP@PDA@nylon membrane was characterized by SEM, EDS, FTIR, and XPS. The membrane could separate various oil-in-water emulsions in a wide range of average particle sizes (50.9–1832.0 nm). In addition, the CS-TPP@PDA@nylon membrane demonstrated high permeation flux (221.0–1770.5 L m −2 h −1 ) and good regeneration ability. The flux could still maintain more than 89% even after fifteen cycles. The degradable modification materials and simple preparation process would highlight the potential of modified membranes in large-scale production and green oily wastewater treatment .
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
Advanced Materials Interfaces
·
2018
·Vol. 5
·期 21
·1801179
·
IF 4.834
Xiangyu Li,Qingdong Zhang,Weifeng Zhang,Ruixiang Qu,Yen Wei,Lin Feng
Water contaminated with various oils has become one of the most pervasive environmental issues. Developing an efficient and durable separation membrane is of significance but challenging due to the critical limitations of nonuniversality and discontinuity for oil/water separation. Herein, a material is presented by combining the porous nylon membrane with self-assembled thiol molecules, exhibiting tunable wettability property upon the pH variation. Such a smart membrane shows high hydrophobicity in nonbasic environment while transition into superhydrophilicity under basic condition, demonstrating a robust and controllable separation performance for various oil/water mixtures and surfactant-stabilized emulsions along with excellent recyclability of the long-term separation. This facile and general strategy suggests encouraging the development of the next generation of energy-saving water treatment systems, applying to intelligent separation and on-demand oil-spills cleanup.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Jiawen Cheng,Jiping Ma,Shuang Li,Qiaoning Wang,Min Lv,Jinhua Li,Xiaoyan Wang,Hongdan Wang,Lingxin Chen
Hexabromocyclododecanes (HBCDs) have given their adverse effects on environment and human health, and highly sensitive analysis of HBCDs in water is urgent. In this study, a new method for the determination of trace HBCDs in water was established by covalent organic framework (COF) based nylon membrane extraction (ME) coupled with ultrahigh-performance liquid chromatography−tandem mass spectrometry (UHPLC−MS/MS). The COF had been self-assembled onto the nylon membrane in a gentle strategy to fabricate COF nylon membrane. Several important ME parameters including the dosage of COF, pH, eluent condition and salinity were systematically investigated. The limits of detection and quantification were 0.011–0.014 and 0.038–0.047 ng/L for three HBCDs, respectively. The linear ranges were from 0.04 to 20 ng/L, and the relative standard deviations were 5.7–17.8 % (intra-day) and 5.2–14.1 % (inter-day). In addition, density functional theory (DFT) calculations on adsorption energy proved that the introduction of halogen bond (XB) made a key contribution to high extraction efficiency and excellent selectivity of COF nylon membrane for HBCDs. The 500 mL of samples, including tap water and reservoir water, could be extracted only in 23 min. The established method presented highly sensitive for ultra-trace analysis of HBCDs in environmental water.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Water Supply
·
2021
·Vol. 22
·期 1
·126-136
·
IF 1.033
Hu Jun,Yang Zuoguo
Unlike previous utilization of ultrafiltration membranes as supporters of graphene oxide (GO) composite membranes, this study first adopts microporous nylon membranes as substrates. The cationic polyelectrolyte/GO composite membranes are prepared by the layer-by-layer self-assembly method via electrostatic attraction. The introduction of polycations between nanochannels in the GO membranes effectively suppresses the swelling and improves the stability of the membranes. It is found that the polyelectrolytes' charge density and the surface potential of the composite membranes jointly determine the membranes' properties. The experimental results show that the novel GO membranes can obtain high flux and considerable desalination performance under low operating pressure. Typically, the salt rejection rate reaches 66.8% for 1.0 g/L MgSO 4 , and the flux is 39.8 L·m −2 ·h −1 ·bar −1 . Benefitting from the GO composite membranes keeping similar retention for both high and low concentration salt solutions, the ideal desalination performance could be obtained through multi-stage processes on the premise of ensuring high flux, which is more suitable for industry. Cationic polyelectrolyte/graphene oxide composite membranes were firstly prepared by layer-by-layer self-assembly via electrostatic attraction on the nylon microfiltration membranes. High flux and considerable desalination performance were obtained under low operating pressure. Charge density of polyelectrolytes and surface potential of GO composite membranes jointly determine membranes’ properties.
研究领域:
材料科学
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膜技术
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海水淡化
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纳米技术
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高分子科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Libin Wan,Huoliang Gao,Haidong Gao,Ge Yan,Fayun Wang,Yong Wang,Mantang Chen
A novel dummy molecularly imprinted polymer (MIP) was prepared for highly specific recognition of vardenafil. Sildenafil was used as the template, and Fe-based metal-organic gel was in situ formed and acted as structural modulator and porogenic agent. The obtained MIP was demonstrated to have stronger binding affinity and higher binding capacity towards vardenafil than non-imprinted polymer (NIP). Adsorption processes of vardenafil on MIP and NIP were fitted well by Freundlich isotherm model. Combined with LC-MS analysis, a miniaturized solid phase extraction (SPE) method using MIP as the adsorbent and using a syringe connected with a nylon membrane filter as the adsorbent container was developed. Under the optimal extraction parameters, trace vardenafil has been extracted by the developed method from the spiked water sample with satisfied recovery of 104%, and the intra- and inter-day relative standard deviations (RSDs) were below 7.3%. The linear range was 10–1000 ng mL −1 (R 2 = 0.9996), and the limit of detection (LOD, S/N = 3) and limit of quantification (LOQ, S/N = 10) were 1.8 and 6.0 μg L −1 , respectively. Finally, the proposed MIP-SPE-LC/MS method was applied to discover vardenafil from health care products (HCPs) using standard addition method. The repeatability for both HCPs was below 6.3% (RSD values). Analysis results implied that the developed MIP-SPE-LC/MS method is green, convenient and useful to monitor the illegal additives in HCPs.
研究领域:
分析化学
·
药学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Shudi Li,Wanyu Lu,Qijin Tang,Qian Xiao,Yixin Kang,Lingye Hu,Yong Huang,Chao Peng,Hao Yang
Oily wastewater as one of water pollutions has always been a hot issue in the field of chemical engineering and environment protection, and it is still challenge to separate oil water mixture effectively with low energy consumption. Polymer membranes with superhydrophilic and underwater superoleophobic properties are perfect substances for oil–water separation owning to their high separation efficiency, oil anti-adhesion and energy saving. However, these membranes are easily contaminated by microorganisms, leading to biofilms on the surfaces, and reducing their separation flux and efficiency. In order to solve the problems, sodium alginate/chitosan-Ag composite were successfully coated on commercial nylon membranes by self-assembly method, and the effects of the Ag on separation performance and biological activity of the membranes were investigated in detail. Under the optimized condition, the membrane can effectively separate oil-in-water emulsions containing anionic, cationic or non-ionic surfactants, with a maximum separation efficiency of 99.73%. More importantly, the inhibition ratios of the membrane could reach 95.42% and 98.05% against E. coli and S. aureus , respectively, and thus inhibits the formation of S. aureus biofilm, and maintain a high relative flux after being contaminated by S. aureus . The simple preparation process and incredible emulsion separation performance with antibacterial activity of composite membranes will provide great prospects for potential industrial applications.
研究领域:
化学工程
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环境保护
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材料科学
·
膜技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Zhe Dong,Jian Tan,Manuel Pinelo,Hao Zhang,Yinhua Wan,Jianquan Luo
A mussel-inspired coating based on catecholamine chemistry can serve as a versatile platform for covalent enzyme immobilization. However, its application was limited by the weak salt/acid/alkali tolerance. To tackle this issue, three silane coupling agents were screened to construct a coating layer on a nylon membrane with tannic acid (TA) for enzyme immobilization. It was found that TA/3-aminopropyltriethoxysilane (APTES), and TA/3-(2-aminoethylamino) propyltriethoxysilane (AEAPTES) coatings had higher enzyme loading and activity than TA/3-glycidyloxypropyltrimethoxysilane (KH-560), because TA/APTES and TA/AEAPTES coatings formed more nanoparticles and thus provided more active sites for enzyme attachment (taking glucose oxidase as an example). Then, the pH tolerance of the immobilized enzyme was greatly enhanced by reinforcing the interfacial interactions of membrane–coating and coating–enzyme, which was realized by membrane pretreatment, ternary additive, and metal ions chelation posttreatment. The optimized TA/AEAPTES/tetraethoxysilane (TEOS)-Fe3+ coating showed excellent pH stability and reusability, and the immobilized enzyme retained 82%, 83%, and 79% of its initial activity even after 7 h of incubation in buffer solutions at pH 3, 7, and 11, respectively. Such a coating layer was also evaluated for zearalenone hydrolase (ZHD) immobilization, and the immobilized ZHD exhibited boosted activity and robust reusability in the degradation of zearalenone (ZEN, a refractory and hypertoxic mycotoxin). This work not only offered a green and practical strategy for enzyme immobilization but also provided fundamental data in the design of a mussel-inspired coating layer toward versatile applications.
研究领域:
材料科学
·
生物技术
·
环境科学
·
化学工程
✓ 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）