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  4. Effect of divalent versus monovalent cations on the MS2 retention capacity of amino-functionalized ceramic filters
 
Zitierlink DOI
10.26092/elib/2488
Verlagslink DOI
10.1039/c8cp01607k

Effect of divalent versus monovalent cations on the MS2 retention capacity of amino-functionalized ceramic filters

Veröffentlichungsdatum
2018-04-10
Autoren
Bartels, Julia  
Hildebrand, Nils Alexander  
Nawrocki, Marcin  
Kroll, Stephen  
Maas, Michael  
Colombi Ciacchi, Lucio  
Rezwan, Kurosch  
Zusammenfassung
Ceramic capillary membranes conditioned for virus filtration via functionalization with n-(3-trimethoxysilylpropyl)diethylenetriamine (TPDA) are analyzed with respect to their virus retention capacity when using feed solutions based on monovalent and divalent salts (NaCl, MgCl2). The log reduction value (LRV) by operating in dead-end mode using the model bacteriophage MS2 with a diameter of 25 nm and an IEP of 3.9 is as high as 9.6 when using feeds containing MgCl2. In contrast, a lesser LRV of 6.4 is observed for feed solutions based on NaCl. The TPDA functionalized surface is simulated at the atomistic scale using explicit-solvent molecular dynamics in the presence of either Na+ or Mg2+ ions. Computational prediction of the binding free energy reveals that the Mg2+ ions remain preferentially adsorbed at the surface, whereas Na+ ions form a weakly bound dissolved ionic layer. The charge shielding between surface and amino groups by the adsorbed Mg2+ ions leads to an upright orientation of the TPDA molecules as opposed to a more tilted orientation in the presence of Na+ ions. The resulting better accessibility of the TPDA molecules is very likely responsible for the enhanced virus retention capacity using a feed solution with Mg2+ ions.
Schlagwörter
Mimenima
Verlag
Royal Society of Chemistry
Institution
Universität Bremen  
Fachbereich
Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04)  
Institute
Zentrum für Umweltforschung und nachhaltige Technologien (UFT)  
MAPEX Center for Materials and Processes  
Faserinstitut Bremen e.V. (FIBRE)  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Physical chemistry chemical physics : PCCP  
Band
20
Heft
16
Startseite
11215
Endseite
11223
Seitenzahl
9
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Lizenz
Alle Rechte vorbehalten
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

J. Bartels, N. Hildebrand, M. Nawrocki, S. Kroll, M. Maas, L. Colombi Ciacchi, K. Rezwan, Effect of divalent versus monovalent cations_2018_accepted version.pdf

Size

2.9 MB

Format

Adobe PDF

Checksum

(MD5):daa22f878f65af5fb0bee60f91676136

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