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Léniz-Pizarro F, Vogler RJ, Sandman P, Harris N, Ormsbee LE, Liu C, Bhattacharyya D. Dual-Functional Nanofiltration and Adsorptive Membranes for PFAS and Organics Separation from Water. ACS ES&T WATER 2022; 2:863-872. [PMID: 35822195 PMCID: PMC9273029 DOI: 10.1021/acsestwater.2c00043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Challenges associated with water separation technologies for per- and polyfluoroalkyl substances (PFASs) require efficient and sustainable processes supported by a proper understanding of the separation mechanisms. The solute rejections by nanofiltration (NF) at pH values near the membrane isoelectric point were compared to the size- and mass-transfer-dependent modeled rejection rates of these compounds in an ionized state. We find that the low pK a value of perfluorooctanoic acid (PFOA) relates to enhanced solute exclusions by minimizing the presence and partitioning of the protonated organic compound into the membrane domain. The effects of Donnan exclusion are moderate, and co-ion transport also contributes to the PFAS rejection rates. An additional support barrier with thermo-responsive (quantified by water permeance variation) adsorption/desorption properties allows for enhanced separations of PFAS. This was possible by successfully synthesizing an NF layer on top of a poly-N-isopropylacrylamide (PNIPAm) pore-functionalized microfiltration support structure. The support layer adsorbs organics (178 mg PFOA adsorbed/m2 membrane at an equilibrium concentration of 70 mg/L), and the simultaneous exclusion from the NF layer allows separations of PFOA and the smaller sized heptafluorobutyric acid from solutions containing 70 μg/L of these compounds at a high water flux of 100 L/m2-h at 7 bar.
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Affiliation(s)
- Francisco Léniz-Pizarro
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Ronald J Vogler
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Phillip Sandman
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Natalie Harris
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Lindell E Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Chunqing Liu
- Membranes R&D Group, Honeywell UOP, Des Plaines, Illinois 60016, United States
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
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2
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Romero-Guzmán D, Gallardo-Moreno AM, González-Martín ML. 3D-PLA-experimental set up to display the electrical background of the so-called geometric factor of electrokinetic cells. Phys Chem Chem Phys 2021; 23:14477-14485. [PMID: 34184006 DOI: 10.1039/d1cp01172c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The so-called geometric factor defined in electrokinetic cells, L/S (L being the length and S the cross-section of the channel), is relevant for providing the surface interaction electrical potential (zeta potential, ζ) of large surfaces, such as those used in the design of biomedical devices or water purification systems. Conversely, recent studies demonstrate that this factor is also employed to determine geometrical parameters, such as porosity in membrane-like systems. This factor, which has been attributed exclusively a geometrical character, can also be obtained from the electrical conductivity and resistance of the electrokinetic channel. In this work, we assess whether these two ways of obtaining the L/S factor are equivalent and how possible deviations can affect the value of the zeta potential. For this purpose, we work with channels of different geometries obtained by 3D printing using PLA (polylactic acid) as a polymer employed in biomedical applications. The discrepancies between the L/S factor obtained by electrical and purely geometrical measurements increase as the geometrical L/S factor becomes larger, reaching differences close to 80%. The results show that the so-called geometrical L/S factor also has an important electrical contribution and would be better denoted as electrogeometric factor. The differences found between the L/S factors are also propagated to the calculation of ζ but an optimum conductivity zone (from about 10 to 40 mS m-1) can be defined to obtain the zeta potential by selecting any of the L/S factors obtained from electrokinetic measurements. The results of this work should be taken into account in those investigations that use the L/S factor to obtain the geometry-porosity of permeable materials.
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Affiliation(s)
- Daniel Romero-Guzmán
- University Institute of Biosanitary Research of Extremadura (iNube), Ave. Elvas s/n, Badajoz, Spain. and Department of Applied Physics, University of Extremadura, Spain and Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Amparo M Gallardo-Moreno
- University Institute of Biosanitary Research of Extremadura (iNube), Ave. Elvas s/n, Badajoz, Spain. and Department of Applied Physics, University of Extremadura, Spain and Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - M Luisa González-Martín
- University Institute of Biosanitary Research of Extremadura (iNube), Ave. Elvas s/n, Badajoz, Spain. and Department of Applied Physics, University of Extremadura, Spain and Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
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3
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Léniz-Pizarro F, Liu C, Colburn A, Escobar IC, Bhattacharyya D. Positively charged nanofiltration membrane synthesis, transport models, and lanthanides separation. J Memb Sci 2021; 620:118973. [PMID: 35002049 PMCID: PMC8740894 DOI: 10.1016/j.memsci.2020.118973] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The design and understanding of rejection mechanisms for both positively and negatively charged nanofiltration (NF) membranes are needed for the development of highly selective separation of multivalent ions. In this study, positively charged nanofiltration membranes were created via an addition of commercially available polyallylamine hydrochloride (PAH) by conventional interfacial polymerization technique. Demonstration of real increase in surface zeta potential, along with other characterization methods, confirmed the addition of weak basic functional groups from PAH. Both positively and negatively charged NF membranes were tested for evaluating their potential as a technology for the recovery or separation of lanthanide cations (neodymium and lanthanum chloride as model salts) from aqueous sources. Particularly, the NF membranes with added PAH performed high and stable lanthanides retentions, with values around 99.3% in mixtures with high ionic strength (100 mM, equivalent to ~6,000 ppm), 99.3% rejection at 85% water recovery (and high Na+/La3+ selectivity, with 0% Na+ rejection starting at 65% recovery), and both constant lanthanum rejection and permeate flux at even pH 2.7. Donnan steric pore model with dielectric exclusion elucidated the transport mechanism of lanthanides and sodium, proving the potential of high selective separation at low permeate fluxes using positively charged NF membranes.
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Affiliation(s)
- Francisco Léniz-Pizarro
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Chunqing Liu
- Membranes R&D Group, Honeywell UOP, 50 E. Algonquin Road, Des Plaines, IL 60016, USA
| | - Andrew Colburn
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Isabel C. Escobar
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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4
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Worou CN, Kang J, Shen J, Yan P, Wang W, Gong Y, Chen Z. Runge-Kutta Numerical Method Followed by Richardson's Extrapolation for Efficient Ion Rejection Reassessment of a Novel Defect-Free Synthesized Nanofiltration Membrane. MEMBRANES 2021; 11:membranes11020130. [PMID: 33672826 PMCID: PMC7918593 DOI: 10.3390/membranes11020130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 01/28/2021] [Accepted: 02/08/2021] [Indexed: 12/31/2022]
Abstract
A defect-free, loose, and strong layer consisting of zirconium (Zr) nanoparticles (NPs) has been successfully established on a polyacrylonitrile (PAN) ultrafiltration substrate by an in-situ formation process. The resulting organic–inorganic nanofiltration (NF) membrane, NF-PANZr, has been accurately characterized not only with regard to its properties but also its structure by the atomic force microscopy, field emission scanning electron microscopy, and energy dispersive spectroscopy. A sophisticated computing model consisting of the Runge–Kutta method followed by Richardson extrapolation was applied in this investigation to solve the extended Nernst–Planck equations, which govern the solute particles’ transport across the active layer of NF-PANZr. A smart, adaptive step-size routine is chosen for this simple and robust method, also known as RK4 (fourth-order Runge–Kutta). The NF-PANZr membrane was less performant toward monovalent ions, and its rejection rate for multivalent ions reached 99.3%. The water flux of the NF-PANZr membrane was as high as 58 L · m−2 · h−1. Richardson’s extrapolation was then used to get a better approximation of Cl− and Mg2+ rejection, the relative errors were, respectively, 0.09% and 0.01% for Cl− and Mg2+. While waiting for the rise and expansion of machine learning in the prediction of rejection performance, we strongly recommend the development of better NF models and further validation of existing ones.
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5
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Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.04.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Rouquié C, Liu S, Rabiller-Baudry M, Riaublanc A, Frappart M, Couallier E, Szymczyk A. Electrokinetic leakage as a tool to probe internal fouling in MF and UF membranes. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117707] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Korzhova E, Déon S, Koubaa Z, Fievet P, Lopatin D, Baranov O. Modification of commercial UF membranes by electrospray deposition of polymers for tailoring physicochemical properties and enhancing filtration performances. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117805] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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8
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Zhang Z, Rahman MM, Abetz C, Höhme AL, Sperling E, Abetz V. Chemically Tailored Multifunctional Asymmetric Isoporous Triblock Terpolymer Membranes for Selective Transport. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907014. [PMID: 31945230 DOI: 10.1002/adma.201907014] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/06/2019] [Indexed: 06/10/2023]
Abstract
Membrane-based separation of organic molecules with 1-2 nm lateral dimensions is a demanding but rather underdeveloped technology. The major challenge is to fabricate membranes having distinct nanochannels with desired functionality. Here, a bottom-up strategy to produce such a membrane using a tailor-made triblock terpolymer featuring miscible end blocks with two different functional groups is demonstrated. A scalable multifunctional integral asymmetric isoporous membrane is fabricated by the solvent evaporation-induced self-assembly of the block copolymer combined with nonsolvent-induced phase separation. The membrane nanopores are readily functionalized using positively and negatively charged moieties by two straightforward gas-solid reactions. The pores of the post-functionalized membranes act as target-specific functional soft nanochannels due to swelling of the polyelectrolyte blocks in a hydrated state. The membranes show unprecedented separation selectivity of small molecules based on size and/or charge which demonstrates the potential of the proposed strategy to prepare next-generation nanofiltration membranes.
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Affiliation(s)
- Zhenzhen Zhang
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Md Mushfequr Rahman
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Clarissa Abetz
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Anke-Lisa Höhme
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Evgeni Sperling
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Volker Abetz
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
- Institute of Physical Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany
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9
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Understanding the impact of poly(allylamine) plasma grafting on the filtration performances of a commercial polymeric membrane. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.11.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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Affiliation(s)
- Asima Naz
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
- Department of Chemistry, Mirpur University of Science & Technology (MUST), Mirpur, Azad Jammu & Kashmir, Pakistan
| | - Rabia Sattar
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
- Department of Chemistry, The University of Lahore, Sargodha, Pakistan
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
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11
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Electrokinetic Characterization of Natural Stones Coated with Nanocomposites for the Protection of Cultural Heritage. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8091694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Protective coatings, in recent years also from nanocomposite formulations, are commonly applied onto architectural stone and stone artefacts, mainly to prevent absorption of condensed water and dissolved atmospheric pollutants into the porous stone structure. While standard protocols to assess a coating’s performance are available, understanding the response of the coating-stone system is a complex task, due to the interplay of various factors determining the overall behaviour. Characterization techniques allowing one to correlate the extent and nature of surface modification upon treatment with the most relevant physical properties (i.e., water absorption and surface wettability) are thus of great interest. Electrokinetic analysis based on streaming current measurements, thanks to its sensitivity towards even minor changes in the surface chemical composition, may fulfil such requirement. Indeed, by involving the interaction with a testing aqueous electrolyte solution, this technique allows one to probe not only the outer surface, but also the outermost layer of the pore network, which plays a crucial role in the interaction of the stone with condensed atmospheric water. In this work, a correlation was found between the extent of surface modification, as determined by streaming current measurements, surface wettability and capillary water absorption, for three lithotypes with different mineralogical and microstructural properties treated with two nanocomposite formulations (one water based and one in alcoholic solvent) containing organosilica precursors and titania nanoparticles.
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12
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Electrokinetic investigation of deposition of cationic fabric softener vesicles on anionic porous cotton fabrics. J Colloid Interface Sci 2018; 514:132-145. [DOI: 10.1016/j.jcis.2017.11.062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/17/2017] [Accepted: 11/20/2017] [Indexed: 01/19/2023]
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13
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Déon S, Deher J, Lam B, Crini N, Crini G, Fievet P. Remediation of Solutions Containing Oxyanions of Selenium by Ultrafiltration: Study of Rejection Performances with and without Chitosan Addition. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02615] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sébastien Déon
- Institut
UTINAM (UMR CNRS 6213), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
| | - Julien Deher
- Institut
UTINAM (UMR CNRS 6213), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
- Laboratoire
Chrono-Environnement (UMR CNRS 6249), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
| | - Boukary Lam
- Institut
UTINAM (UMR CNRS 6213), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
| | - Nadia Crini
- Laboratoire
Chrono-Environnement (UMR CNRS 6249), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
| | - Gregorio Crini
- Laboratoire
Chrono-Environnement (UMR CNRS 6249), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
| | - Patrick Fievet
- Institut
UTINAM (UMR CNRS 6213), Université de Bourgogne Franche-Comté, 16 route de Gray, Besançon, 25030 CEDEX, France
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14
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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.
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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
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15
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Thomas TE, Aani SA, Oatley-Radcliffe DL, Williams PM, Hilal N. Laser Doppler Electrophoresis and electro-osmotic flow mapping: A novel methodology for the determination of membrane surface zeta potential. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.10.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Espanol M, Mestres G, Luxbacher T, Dory JB, Ginebra MP. Impact of Porosity and Electrolyte Composition on the Surface Charge of Hydroxyapatite Biomaterials. ACS APPLIED MATERIALS & INTERFACES 2016; 8:908-917. [PMID: 26684866 DOI: 10.1021/acsami.5b10404] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The success or failure of a material when implanted in the body is greatly determined by the surface properties of the material and the host tissue reactions. The very first event that takes place after implantation is the interaction of soluble ions, molecules and proteins from the biological environment with the material surface leading to the formation of an adsorbed protein layer that will later influence cell attachment. In this context, the particular topography and surface charge of a material become critical as they influence the nature of the proteins that will adsorb. However, very limited information is available on the surface charge of porous substrates. Only until very recently was the determination of the zeta potential on porous membranes accurately determined. The goal of this work was to implement the previous findings for the determination of the zeta potential of a series of porous hydroxyapatite (HA) substrates and to assess how porosity affects the measurements. In addition, studies using various electrolytes were also performed to prove how the specific affinity of certain ions for HA can further impact surface charge. The results showed that all materials exhibited very similar external surface charge (approximately -23 mV), consistent with their almost identical topographies. However, the presence of interconnected pores underneath the sample surface resulted in an additional internal zeta potential that varied with the porosity content. Measurements with different electrolytes confirmed the selectivity of divalent ions for HA underlying the importance of testing biomaterials using relevant electrolytes.
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Affiliation(s)
- Montserrat Espanol
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC) , Avinguda Diagonal 647, 08028 Barcelona, Spain
- Centre for Research in Nanoengineering, Technical University of Catalonia (CRNE-UPC) , Pascual i Vila 15, 08028 Barcelona, Spain
| | - Gemma Mestres
- Department of Engineering Sciences, Uppsala University , 751 21 Uppsala, Sweden
| | | | - Jean-Baptiste Dory
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC) , Avinguda Diagonal 647, 08028 Barcelona, Spain
| | - Maria-Pau Ginebra
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC) , Avinguda Diagonal 647, 08028 Barcelona, Spain
- Centre for Research in Nanoengineering, Technical University of Catalonia (CRNE-UPC) , Pascual i Vila 15, 08028 Barcelona, Spain
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17
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Efligenir A, Fievet P, Déon S, Sauvade P. Tangential electrokinetic characterization of hollow fiber membranes: Effects of external solution on cell electric conductance and streaming current. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Coday BD, Luxbacher T, Childress AE, Almaraz N, Xu P, Cath TY. Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.12.047] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Zhao L, Peng X, Yang S, Zhang Y, Wu J, Wei X, Li F, Pu Q. Facile real-time evaluation of the stability of surface charge under regular shear stress by pulsed streaming potential measurement. RSC Adv 2015. [DOI: 10.1039/c5ra12501d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The applicability of the pulsed streaming potential measurement for real-time evaluation of stability of assembled layers based on the relative zeta potential change rate SR was demonstrated.
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Affiliation(s)
- Lei Zhao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Xianglu Peng
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Shenghong Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Yuan Zhang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Jing Wu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Xuan Wei
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Fengyun Li
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Qiaosheng Pu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
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20
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Hanafi Y, Szymczyk A, Rabiller-Baudry M, Baddari K. Degradation of poly(ether sulfone)/polyvinylpyrrolidone membranes by sodium hypochlorite: insight from advanced electrokinetic characterizations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:13419-13426. [PMID: 25365117 DOI: 10.1021/es5027882] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Poly(ether sulfone) (PES)/polyvinylpyrrolidone (PVP) membranes are widely used in various industrial fields such as drinking water production and in the dairy industry. However, the use of oxidants to sanitize the processing equipment is known to impair the integrity and lifespan of polymer membranes. In this work we showed how thorough electrokinetic measurements can provide essential information regarding the mechanism of degradation of PES/PVP membranes by sodium hypochlorite. Tangential streaming current measurements were performed with ultrafiltration and nanofiltration PES/PVP membranes for various aging times. The electrokinetic characterization of membranes was complemented by FTIR-ATR spectroscopy. Results confirmed that sodium hypochlorite induces the degradation of both PES and PVP. This latter is easily oxidized by sodium hypochlorite, which leads to an increase in the negative charge density of the membrane due to the formation of carboxylic acid groups. The PVP was also found to be partly released from the membrane with aging time. Thanks to the advanced electrokinetic characterization implemented in this work it was possible for the first time to demonstrate that two different mechanisms are involved in the degradation of PES. Phenol groups were first formed as a result of the oxidation of PES aromatic rings by substitution of hydrogen by hydroxyl radicals. For more severe aging conditions, this membrane degradation mechanism was followed by the formation of sulfonic acid functions, thus indicating a second degradation process through scission of PES chains.
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Affiliation(s)
- Yamina Hanafi
- Université de Rennes 1 , Institut des Sciences Chimiques de Rennes (UMR CNRS 6226), 263 Avenue du Général Leclerc, CS 74205, 35042 Rennes, France
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Idil Mouhoumed E, Szymczyk A, Schäfer A, Paugam L, La Y. Physico-chemical characterization of polyamide NF/RO membranes: Insight from streaming current measurements. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.03.025] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Electrokinetics in undeveloped flows. J Colloid Interface Sci 2013; 410:195-201. [DOI: 10.1016/j.jcis.2013.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 08/07/2013] [Accepted: 08/08/2013] [Indexed: 11/24/2022]
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