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Purifying chylous plasma by precluding triglyceride via carboxylated polyethersulfone microfiltration membrane

Chinese Journal of Chemical Engineering 2022年第9期35卷 130-139页

作者： Yang Liu Qiu Han Guiliang Li Haibo Lin Fu Liu Gang Deng Dingfeng Lv Weijie Sun Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315000China University of Chinese Academy of Sciences Beijing 100049China The Ningbo Central Blood Station Ningbo 315099China Department of Blood Transfusion Ningbo First HospitalNingbo 315010China

Precluding the excessive lipoproteins from plasma rapidly and effectively is highly needed for biomedical detection and reducing plasma product scrap in blood donation stations.The current centrifugation procedure is high-cost and time-consuming.Herein,we fabricated an anionic microfiltration polyethersulfone(PES)membrane modified by interface swelling and implanting of acrylic acid(AA)for screening out large particle lipoprotein chylomicron(CM)and adsorbing cationic very low-density lipoproteins(VLDL).To improve the separation efficiency,a two-stage filtration through carboxylated polyethersulfone microfiltration membranes with the mean pore size of 0.45 and 0.22μm respectively were conducted.Attenuated total reflection Fourier transform infrared technique(ATR-FTIR),water contact angle(WCA),Zeta potential and scanning electron microscope(SEM)were employed to characterize the modified membrane.To test the effectiveness of this membrane,plasma flux and concentration variation of plasma components were examined to study the purification effectiveness.Furthermore,the hemocompatibility of modified membranes was tested to confirm its practicability on bloodcontacting materials.The carboxylated polyethersulfone microfiltration membrane shows its promising potential application to purify chylous plasma.

关键词： Chylous plasma Chylomicrons Very low-density lipoproteins Carboxylated polyethersulfone microfiltration membrane

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Polyaniline-poly(vinylidene fluoride) blend microfiltration membrane and its spontaneous gold recovery application

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Science China Chemistry 2018年第1期61卷 118-126页

作者： Gang Liu Tangliu Yan Yuanzhao Wu Xiaohui Yi Bin Chen Run-Wei Li CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China Zhejiang Province Key Laboratory of Magnetic Materials and Applied Technology Ningbo Institute of Materials Technology and Engineering. Chinese Academy of Sciences Ningbo 315201 China University of Chinese Academy of Sciences Beijing 100049 China

Structural regular polyaniline was synthesized via a modified-chemical oxidative polymerization reaction. Highly hydrophilic polyaniline(PANi) and polyaniline-poly(vinylidene fluoride) blend(PANi-PVDF) membranes were prepared by solution casting and phase inversion techniques. Both of the mechanical and filtration properties of the membranes depend on the polymer composition and doping level of the blends. The elasticity of the membrane is greatly improved upon introducing poly(vinylidene fluoride) into the blend. The water permeability of the blend membranes is further enhanced when the membranes are doped with hydrochloric acid. The PANi-PVDF blend membranes are capable of recovering metallic gold from the acid/halide leaching streams spontaneous and sustainably, and are promising candidates for wastewater treatments in electronic industries.

关键词： polyaniline poly(vinylidene fluoride) polymer blend microfiltration membrane gold recovery

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A new microfiltration membrane with three-dimensional reticular architecture for Nano-pollutants removal from wastewater

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Progress in Natural Science:Materials International 2021年第3期31卷 414-419页

作者： Wanyuan Gui Jingru Liu Xiping Song Hui Zhang Junpin Lin Benli Luan National Center for Materials Service Safety State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Department of Chemistry Western University Qian Xuesen Laboratory of Space Technology China Academy of Space Technology

This research provides a new insight into designing next-generation filtration materials for Nano-pollutants removal from wastewater, and potentially for gas/solid or liquid/solid separation in corrosive environment.Considering the high corrosion and oxidation resistance, Ti–40 Al–10 Nb–10 Cr porous alloy was prepared by powder metallurgy and used as a mechanical support with a pore size of around 10 μm. Subsequently, metallic Zn nanoparticles was coated on the Ti–40 Al–10 Nb–10 Cr porous framework by means of chemical vapor deposition,obtaining a novel microfiltration membrane with three-dimensional reticular architecture. Furthermore, the influence of Zn coating on surface morphology, pore feature, and filtration capability of Ti–40 Al–10 Nb–10 Cr porous alloy was investigated. It is of note that the as-prepared microfiltration membrane exhibits an excellent Nanopollutants filtration efficiency of greater than 99.989% from wastewater. Most importantly, such a threedimensional reticular architecture provides excellent structural stability, allowing the reutilization of the microfiltration membrane for at least 200 filtration cycles of wastewater treatment.

关键词： Porous materials microfiltration membrane Separation and purification Intermetallic materials Water purification

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Roles of membrane and organic fouling layers on the removal of endocrine disrupting chemicals in microfiltration

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Journal of Environmental Sciences 2018年第10期30卷 176-184页

作者： Wenchao Xue Kang Xiao Peng Liang Xia Huang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Department of Environmental Engineering Faculty of Engineering Chulalongkorn University College of Resources and Environment University of Chinese Academy of Sciences

To understand the adsorption behavior of endocrine disrupting chemicals（EDCs） is important for enhancing the treatment performance and preventing potential secondary pollution caused by EDCs desorption in a microfiltration system. The dynamic adsorption of four representative EDCs, namely estriol（E3）, 17β-estradiol（E2）, 17α-ethynylestradiol（EE2）, and 4-nonylphenol（4-NP） in a microfiltration system was investigated using the Thomas＇ model.The product of the equilibrium constant and the total adsorption capacity of the membrane,Ka, for E3, E2, EE2, and 4-NP were 4.91, 9.78, 15.6, and 826, respectively, strongly correlating with the compound octanol–water partition coefficient（KOW）. Adsorption appeared to be enhanced when organic fouling formed on the surface of membrane, indicating the role of an additional adsorption column for EDCs acted by a fouling layer in microfiltration. Results of a comparison between the Ka values for clean membrane and fouled membrane illustrated that the significant contribution made by fouling layers may be attributed to the foulant layer＇s hydrophobicity（in the case of calcium humate layer） and thickness（in the case of calcium alginate layer）. This study provided a novel perspective to quantitatively analyze the dynamic adsorption behavior of trace pollutants in membrane process.

关键词： Endocrine disrupting chemicals microfiltration membrane Dynamic adsorption Thomas＇ model Organic membrane fouling

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Modification of AI2O3 microfiltration membrane by Nano-ZnO Coating

Modification of AI2O3 Microfiltration Membrane by Nano-ZnO C...

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The 3～〔rd〕International Conference on High-Performance Ceramics(CICC-3)（2）

作者： Jianer Zhou, Jianqing Wu, Yongqing Wang, Weihui Jiang, Guanghua Ma and Ruibei Cao Department of Inorganic Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China Department of Inorganic Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333001, China

In this paper, the α-AlO microfiltration membrane modified by nano-ZnO coating was obtained using zinc nitrate and urea as raw materials via homogeneous precipitation method. The effects of reaction temperature and coating times on the modification of the membrane were emphatically studied. The test results show that the flux of modified membrane is raised by 43% when the nano-ZnO particles (5-10 nm) are smoothly and densely coated on the surface of the membrane. The mechanism of the modification was studied by means of TEM, FTIR, XPS, Zeta electric potential analyzer, etc.

关键词： Homogeneous precipitation method Zinc oxide Modified coating microfiltration membrane

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Fulvic acid degradation using nanoparticle TiO_2 in a submerged membrane photocatalysis reactor

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Journal of Environmental Sciences 2005年第6期17卷 942-945页

作者： FU Jian-feng JI Min AN Ding-nian School of Environmental Science and Engineering Tianjin University Tianjin 300072 China

The degradation of fulvic acid（FA） by nanoparticle TiO2 in a submerged membrane photocatalysis（SMPC） reactor was studied. In this reactor, photocatalytic oxidation and membrane separation co-occured. The continuous air supplier provided O2 for the photocatalytical reaction and mixed the solution through an airflow controller. The particle TiO2 could automatically settle due to gravity without particle agglomeration so it could be easily separated by microfiltration（MF） membrane. It was efficient to maintain high flux of membranes. The effects of operational parameters on the photocatalytic oxidation rate of FA were investigated. Results indicated that photocatalyst at 0.5 g/L and airflow at 0.06 m^3/h were the optimum condition for the removal of fulvic acid, the removal efficiency was higher in acid media than that in alkaline media. The effects of different filtration duration on permeate flux rate of MF with P25 powder and with nanoparticle TiO2 were compared. Experimental results indicated that the permeate flux rate of MF was improved and the membrane fouling phenomenon was reduced with the addition of nanoparticle TiO2 catalyst compared with conventional P25 powder. Therefore, this submerged membrane photocatalysis reactor can faciliate potential application of photocatalytic oxidation process in drinking water treatment.

关键词： fulvic acid microfiltration membrane nanoparticle TiO2 photocatalytic oxidation reactor

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Flow-Induced Clogging in microfiltration membranes: Numerical Modeling and Parametric Study

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Journal of Water Resource and Protection 2023年第12期15卷 692-705页

作者： Abdullah Rajah Al Qahtani Department of Mechanical Skills in Jubail Technical Institute Royal Commission of Jubail and Yanbu Jubail Saudi Arabia

microfiltration membrane technology has been widely used in various industries for solid-liquid separation. However, pore clogging remains a persistent challenge. This study employs (CFD) and discrete element method (DEM) models to enhance our understanding of microfiltration membrane clogging. The models were validated by comparing them to experimental data, demonstrating reasonable consistency. Subsequently, a parametric study was conducted on a cross-flow model, exploring the influence of key parameters on clogging. Findings show that clogging is a complex phenomenon affected by various factors. The mean inlet velocity and transmembrane flux were found to directly impact clogging, while the confinement ratio and cosine of the membrane pore entrance angle had an inverse relationship with it. Two clog types were identified: internal (inside the pore) and external (arching at the pore entrance), with the confinement ratio determining the type. This study introduced a dimensionless number as a quantitative clogging indicator based on transmembrane flux, Reynolds number, filtration time, entrance angle cosine, and confinement ratio. While this hypothesis held true in simulations, future studies should explore variations in clogging indicators, and improved modeling of clogging characteristics. Calibration between numerical and physical times and consideration of particle volume fraction will enhance understanding.

关键词： microfiltration membrane Parametric Study Computational Fluid Dynamic (CFD) Discrete Element Method (DEM) CFD-DEM Modeling membrane Clogging Pore Geometry Numerical Modeling Cake Layer Clogging Indicator

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