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Membranes 2018, 8(4), 90; https://doi.org/10.3390/membranes8040090

Significance of Brownian Motion for Nanoparticle and Virus Capture in Nanocellulose-Based Filter Paper

Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, Box 534 SE-75121 Uppsala, Sweden
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Received: 9 August 2018 / Revised: 13 September 2018 / Accepted: 25 September 2018 / Published: 5 October 2018
(This article belongs to the Section Membrane Transport Phenomena)
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Abstract

Pressure-dependent breakthrough of nanobioparticles in filtration was observed and it was related to depend on both convective forces due to flow and diffusion as a result of Brownian motion. The aim of this work was to investigate the significance of Brownian motion on nanoparticle and virus capture in a nanocellulose-based virus removal filter paper through theoretical modeling and filtration experiments. Local flow velocities in the pores of the filter paper were modeled through two different approaches (i.e., with the Hagen–Poiseuille equation) and by evaluating the superficial linear flow velocity through the filter. Simulations by solving the Langevin equation for 5 nm gold particles and 28 nm ΦX174 bacteriophages showed that hydrodynamic constraint is favored for larger particles. Filtration of gold nanoparticles showed no difference in retention for the investigated fluxes, as predicted by the modeling of local flow velocities. Filtration of ΦX174 bacteriophages exhibited a higher retention at higher filtration pressure, which was predicted to some extent by the Hagen–Poiseuille equation but not by evaluation of the superficial linear velocity. In all, the hydrodynamic theory was shown able to explain some of the observations during filtration. View Full-Text
Keywords: virus removal filtration; Péclet number; nanocellulose; hydrodynamic constraint; convective capture; diffusion virus removal filtration; Péclet number; nanocellulose; hydrodynamic constraint; convective capture; diffusion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Gustafsson, O.; Gustafsson, S.; Manukyan, L.; Mihranyan, A. Significance of Brownian Motion for Nanoparticle and Virus Capture in Nanocellulose-Based Filter Paper. Membranes 2018, 8, 90.

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