1
|
Leach M, Cox C, Wickramasinghe SR, Chwatko M, Bhattacharyya D. Role of Microfiltration Membrane Morphology on Nanoparticle Purification to Enhance Downstream Purification of Viral Vectors. ACS APPLIED BIO MATERIALS 2024; 7:3932-3941. [PMID: 38822810 DOI: 10.1021/acsabm.4c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
In the rapidly advancing realms of gene therapy and biotechnology, the efficient purification of viral vectors is pivotal for ensuring the safety and efficacy of gene therapies. This study focuses on optimizing membrane selection for viral vector purification by evaluating key properties, including porosity, thickness, pore structure, and hydrophilicity. Notably, we employed adeno-associated virus (AAV)-sized nanoparticles (20 nm), 200 nm particles, and bovine serum albumin (BSA) to model viral vector harvesting. Experimental data from constant pressure normal flow filtration (NFF) at 1 and 2 bar using four commercial flat sheet membranes revealed distinct fouling behaviors. Symmetric membranes predominantly showed internal and external pore blockage, while asymmetric membranes formed a cake layer on the surface. Hydrophilicity exhibited a positive correlation with recovery, demonstrating an enhanced recovery with increased hydrophilicity. Membranes with higher porosity and interpore connectivity showcased superior throughput, reduced operating time, and increased recovery. Asymmetric polyether sulfone (PES) membranes emerged as the optimal choice, achieving ∼100% recovery of AAV-sized particles, an ∼44% reduction in model cell debris (200 nm particles), an ∼35% decrease in BSA, and the fastest operating time of all membranes tested. This systematic investigation into fouling behaviors and membrane properties not only informs optimal conditions for viral vector recovery but also lays the groundwork for advancing membrane-based strategies in bioprocessing.
Collapse
Affiliation(s)
- Mara Leach
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Catherine Cox
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | | | - Malgorzata Chwatko
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| |
Collapse
|
2
|
Vieira Firmino M, Trémier A, Couvert A, Szymczyk A. New insights into biochar ammoniacal nitrogen adsorption and its correlation to aerobic degradation ammonia emissions. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 178:257-266. [PMID: 38417311 DOI: 10.1016/j.wasman.2024.02.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/11/2024] [Accepted: 02/19/2024] [Indexed: 03/01/2024]
Abstract
One of the technical barriers to the wider use of biochar in the composting practices is the lack of accurate quantification linking biochar properties to application outcomes. To address this issue, this paper investigates the use of ammonia nitrogen adsorption capacity by biochar as a predictor of ammonia emission during composting in the presence of biochar. With this in mind, this work investigated the use of ammonia nitrogen adsorption capacity of biochar when mixed with solid digestate, and the reduction in ammonia emissions resulting from the addition of biochar during aerobic degradation of solid digestate. A biochar synthesized at 900 °C, another synthesized at 450 °C, and two derivatives of the latter biochar, one chemically modified with nitric acid and the other with potassium hydroxide, were tested. This study concluded that the chemical characteristics of the biochar, including pH and oxygen/carbon atomic ratio, had a greater influence on the adsorption of ammonia nitrogen than physical attributes such as specific surface area. In this regard, nitric acid modification had superior performance compared to hydroxide potassium modification to increase biochar chemical attributes and reduce ammonia emissions when applied to aerobic degradation. Finally, a significant linear correlation (p-value < 0.05, r2 = 0.79) was found between biochar ammonia nitrogen adsorption capacity and ammonia emissions along composting, showing the potential of this variable as a predictive parameter. This study provides insights for future explorations aiming to develop predictive tests for biochar performance.
Collapse
Affiliation(s)
| | | | - Annabelle Couvert
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France.
| | - Anthony Szymczyk
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR, 6226 Rennes, France.
| |
Collapse
|
3
|
Cherpin C, Lister D, Dacquait F, Liu L, Weerakul S. Magnetite (Fe3O4) and nickel ferrite (NiFe2O4) zeta potential measurements at high temperature: Part I—Design, materials and preliminary characterization of an apparatus implementing the streaming potential method. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
4
|
Tahar AB, Szymczyk A, Tingry S, Vadgama P, Zelsmanne M, Tsujumura S, Cinquin P, Martin D, Zebda A. One-year stability of glucose dehydrogenase confined in a 3D carbon nanotube electrode with coated poly-methylene green: Application as bioanode for a glucose biofuel cell. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.04.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
5
|
Kumar A, Kleinen J, Venzmer J, Gambaryan-Roisman T. Effect of Geometry on Electrokinetic Characterization of Solid Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7556-7568. [PMID: 28655274 DOI: 10.1021/acs.langmuir.7b00344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An analytical approach is presented to describe pressure-driven streaming current (Istr) and streaming potential (Ustr) generation in geometrically complex samples, for which the classical Helmholtz-Smoluchowski (H-S) equation is known to be inaccurate. The new approach is valid under the same prerequisite conditions that are used for the development of the H-S equation, that is, the electrical double layers (EDLs) are sufficiently thin and surface conductivity and electroviscous effects are negligible. The analytical methodology is developed using linear velocity profiles to describe liquid flow inside of EDLs and using simplifying approximations to describe macroscopic flow. At first, a general expression is obtained to describe the Istr generated in different cross sections of an arbitrarily shaped sample. Thereafter, assuming that the generated Ustr varies only along the pressure-gradient direction, an expression describing the variation of generated Ustr along the sample length is obtained. These expressions describing Istr and Ustr generation constitute the theoretical foundation of this work, which is first applied to a set of three nonuniform cross-sectional capillaries and thereafter to a square array of cylindrical fibers (model porous media) for both parallel and transverse fiber orientation cases. Although analytical solutions cannot be obtained for real porous substrates because of their random structure, the new theory provides useful insights into the effect of important factors such as fiber orientation, sample porosity, and sample dimensions. The solutions obtained for the model porous media are used to device strategies for more accurate zeta potential determination of porous fiber plugs. The new approach could be thus useful in resolving the long-standing problem of sample geometry dependence of zeta potential measurements.
Collapse
Affiliation(s)
- Abhijeet Kumar
- Institute for Technical Thermodynamics and Center of Smart Interfaces, TU Darmstadt , 64287 Darmstadt, Germany
- Research Interfacial Technology, Evonik Nutrition & Care GmbH , 45127 Essen, Germany
| | - Jochen Kleinen
- Institute for Technical Thermodynamics and Center of Smart Interfaces, TU Darmstadt , 64287 Darmstadt, Germany
| | - Joachim Venzmer
- Institute for Technical Thermodynamics and Center of Smart Interfaces, TU Darmstadt , 64287 Darmstadt, Germany
| | - Tatiana Gambaryan-Roisman
- Institute for Technical Thermodynamics and Center of Smart Interfaces, TU Darmstadt , 64287 Darmstadt, Germany
| |
Collapse
|
6
|
Filippov AN, Khanukaeva DY, Vasin SI, Sobolev VD, Starov VM. Liquid flow inside a cylindrical capillary with walls covered with a porous layer (Gel). COLLOID JOURNAL 2013. [DOI: 10.1134/s1061933x13020051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
|
8
|
Lanteri Y, Fievet P, Magnenet C, Déon S, Szymczyk A. Electrokinetic characterisation of particle deposits from streaming potential coupled with permeate flux measurements during dead-end filtration. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
9
|
An analysis of current transients during electrophoretic deposition (EPD) from colloidal TiO2 suspensions. J Colloid Interface Sci 2010; 347:102-11. [DOI: 10.1016/j.jcis.2010.03.034] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2010] [Revised: 02/18/2010] [Accepted: 03/15/2010] [Indexed: 11/23/2022]
|
10
|
Vilensky AI, Berezkin VV, Sobolev VD, Sabbatovsky KG, Kochnev YK, Vlasov SV, Mchedlishvili BV. Electrokinetic study of etching latent tracks of accelerated heavy ions in poly(ethylene terephthalate) and polyimide. COLLOID JOURNAL 2009. [DOI: 10.1134/s1061933x09040061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
Leroy P, Revil A, Kemna A, Cosenza P, Ghorbani A. Complex conductivity of water-saturated packs of glass beads. J Colloid Interface Sci 2008; 321:103-17. [DOI: 10.1016/j.jcis.2007.12.031] [Citation(s) in RCA: 239] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 12/20/2007] [Accepted: 12/22/2007] [Indexed: 10/22/2022]
|
12
|
Crespy A, Revil A, Linde N, Byrdina S, Jardani A, Bolève A, Henry P. Detection and localization of hydromechanical disturbances in a sandbox using the self-potential method. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jb005042] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
13
|
Chiu T, James A. Electrokinetic characterisation techniques on asymmetric microfiltration membranes. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.12.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
14
|
Alkafeef SF, Alajmi AF. The electrical conductivity and surface conduction of consolidated rock cores. J Colloid Interface Sci 2007; 309:253-61. [PMID: 17346731 DOI: 10.1016/j.jcis.2007.02.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2006] [Revised: 02/01/2007] [Accepted: 02/03/2007] [Indexed: 10/23/2022]
Abstract
A fully computerized high-pressure and high-temperature core holder device is simultaneously used to determine the electrical conductivity, zeta potential, and surface conductivity of consolidated rock cores in aqueous and nonaqueous systems. The total electrical conductivity of rock cores was determined by coupling streaming current and potential measurements. This shows that neglecting the surface conductivity Ksigma is crucial to converting the streaming potential into zeta potentials. It is observed that plots of the core total conductivity as a function of the electrolyte conductivity KL exhibit two behaviors. At low ionic strength, the core conductivity clearly depends on the contribution of surface conductivity behind the slip plane, whereas at higher ionic strength, the magnitude of the surface conductivity becomes negligible. The electrical conductivity of rock cores was found to be in good agreement with the O'Brien theory and the Briggs method. The contribution of the stagnant layer to the surface conductivity in nonaqueous systems has been shown to be significant. This shows that the stagnant layer displays significantly different behavior in different nonaqueous systems, depending on the core porosity and the double-layer overlap. The results indicate that the application of electrokinetics in petroleum reservoirs can provide important insights into reservoir fluid flow characterization.
Collapse
Affiliation(s)
- Saad F Alkafeef
- Petrophysics and Surface Chemistry Research Laboratory, Petroleum Engineering Department, College of Technological Studies, P.O. Box 32, Hadyia 52851, Kuwait.
| | | |
Collapse
|
15
|
Alkafeef SF, Alajmi AF. Streaming potentials and conductivities of reservoir rock cores in aqueous and non-aqueous liquids. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2006.04.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
16
|
Lu F, How TY, Kwok DY. An improved method for determining zeta potential and pore conductivity of porous materials. J Colloid Interface Sci 2006; 299:972-6. [PMID: 16631186 DOI: 10.1016/j.jcis.2006.03.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2005] [Revised: 03/08/2006] [Accepted: 03/09/2006] [Indexed: 11/18/2022]
Abstract
An improved method based on streaming potential and streaming current was proposed to determine zeta potential and surface conductance of porous material simultaneously. In the electrokinetic generation mode, a resistor is connected to the generator and by measuring the voltage drop across resistors with different resistance, a true streaming current can be determined. The zeta potential and surface conductivity can be obtained simultaneously from their relation to streaming potential and streaming current. The electrode and ion concentration polarization effects during the measurement were also discussed. The resistance from channel ends to electrodes, which has typically been ignored in the literature, was shown to have a significant influence on the calculated zeta potential and surface conductance. Ignorance of this resistance would lead to underestimation of both zeta potential and surface conductance values.
Collapse
Affiliation(s)
- Fuzhi Lu
- Nanoscale Technology and Engineering Laboratory, Department of Mechanical Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | | | | |
Collapse
|
17
|
Skartsila K, Spanos N. Physicochemical characterization of variously packed porous plugs of hydroxyapatite: streaming potential coupled with conductivity measurements. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:1903-10. [PMID: 16460126 DOI: 10.1021/la0524622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A homemade instrument was used for the measurement of the streaming potential, conductivity, and permeability of plugs packed in different densities with hydroxyapatite (HAP) particles at 25 degrees C and pH = 7.0 +/- 0.2. KCl solutions with ionic strength values in the range of 0.3-300 mM, equilibrated with HAP for 3 days, were forced to flow through the plugs. It was found that the particle volume fraction of the plug obtained from conductivity measurements was slightly higher than that obtained by weighing the solid. This suggested that, in addition to the volume of the solid itself, the volume of liquid trapped in the cavities of the particles does not contribute to the conductivity of the plug. The pH change recorded in the solution passed through the plug was attributed to the protonation/deprotonation of the HAP surface groups. Denser packing of the HAP crystallites resulted to higher surface conductivities. It was suggested that this trend was due to the easier interparticle ion transport in close-packed plugs. Considering zeta-potential, the values computed by neglecting surface conductivity were significantly underestimated, especially at low ionic strength values and at dense packing. More realistic values for the HAP zeta-potential were obtained taking into account the surface conductivity. These values were practically independent of the material packing during the plug preparation. Finally, the total surface conductivity was found to be limited behind the slipping plane of the electric double layer developed at the interface of HAP in contact with electrolyte solution.
Collapse
Affiliation(s)
- Kyriaki Skartsila
- School of Science and Technology, Hellenic Open University, 262 23 Patras, Greece
| | | |
Collapse
|
18
|
Saveyn H, Pauwels G, Timmerman R, Van der Meeren P. Effect of polyelectrolyte conditioning on the enhanced dewatering of activated sludge by application of an electric field during the expression phase. WATER RESEARCH 2005; 39:3012-20. [PMID: 15993464 DOI: 10.1016/j.watres.2005.05.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2004] [Revised: 01/13/2005] [Accepted: 05/01/2005] [Indexed: 05/03/2023]
Abstract
Activated sludge is known to be poorly dewaterable due to its high surface charge density and the extreme solids compressibility, even after polyelectrolyte conditioning. The application of an electric field during pressure dewatering (PDW) of sludge can enhance the dewaterability by the electroosmosis effect. A comparative study was conducted to investigate the additional effect of an electric field, applied during the expression phase, on the dewatering course of polyelectrolyte conditioned sludge, compared to mere PDW. It was found that the application of an electric field markedly improved the dewatering kinetics for all sludge samples, regardless of the conditioning treatment. Although the conditioning polyelectrolyte characteristics and dose had a major effect on the PDW of sludge, the conditioning history did not have a significant effect on the electroosmotic water transport efficiency during the sludge expression phase. By means of on-line streaming potential measurements and fractionated filtrate electrophoretic mobility measurements, it could be demonstrated that even at high polyelectrolyte doses, leading to positively charged sludge flocs, negative surface charges were still present inside the sludge matrix. During the expression of the sludge cake, when liquid is forced to move through the floc inside pores, these negative surface charges hampered PDW, but enhanced electroosmotic dewatering. Electroosmosis is therefore an appropriate technique to remove the water fraction that is associated with these negative surface charges.
Collapse
Affiliation(s)
- Hans Saveyn
- Faculty of Agricultural and Applied Biological Sciences, Particle and Interfacial Technology Group, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | | | | | | |
Collapse
|
19
|
Fa K, Paruchuri VK, Brown SC, Moudgil BM, Miller JD. The significance of electrokinetic characterization for interpreting interfacial phenomena at planar, macroscopic interfaces. Phys Chem Chem Phys 2005; 7:678-84. [DOI: 10.1039/b417902a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|