Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102402
Title: Closed-loop magnetic separation of nanoparticles on a packed bed of spheres
Authors: Magnet, C.
Akouala, M.
Kuzhir, P.
Bossis, G.
Zubarev, A.
Wereley, N. M.
Issue Date: 2015
Publisher: American Institute of Physics Inc.
Citation: Closed-loop magnetic separation of nanoparticles on a packed bed of spheres / C. Magnet, M. Akouala, P. Kuzhir, et al. — DOI 10.1063/1.4913938 // Journal of Applied Physics. — 2015. — Vol. 117. — Iss. 17. — 17C719.
Abstract: In this work, we consider magnetic separation of iron oxide nanoparticles when a nanoparticle suspension (diluted ferrofluid) passes through a closed-loop filter composed of a packed bed of micro-beads magnetized by an externally applied magnetic field. We show that the capture of nanoparticles of a size as small as 60 nm is easily achieved at low-to-moderate magnetic fields (16-32 kA/m) thanks to relatively strong magnetic interactions between them. The key parameter governing the capture process is the Mason number - the ratio of hydrodynamic-to-magnetic forces exerted to nanoparticles. The filter efficiency, Λ, defined through the ratio of the inlet-to-outlet concentration shows a power-law dependency on Mason number, Λ∞Ma-0.83, in the range of 102<Ma<104. The proposed theoretical model allows a correct prediction of the Mason number dependency of the filter efficiency. The obtained results could be of potential interest for water purification systems based on chemical adsorption of micro-pollutants on magnetic nanoparticles, followed by magnetic separation of the nanoparticles. © 2015 AIP Publishing LLC.
Keywords: MAGNETIC FIELDS
MAGNETIC SEPARATION
MAGNETISM
NANOMAGNETICS
PACKED BEDS
SEPARATION
WATER POLLUTION
APPLIED MAGNETIC FIELDS
IRON OXIDE NANOPARTICLE
MAGNETIC INTERACTIONS
MAGNETIC NANO-PARTICLES
NANOPARTICLE SUSPENSION
OUTLET CONCENTRATION
PACKED BED OF SPHERES
WATER PURIFICATION SYSTEMS
NANOPARTICLES
URI: http://hdl.handle.net/10995/102402
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84924243710
PURE ID: 363095
ea3c5ce9-3c2a-45b2-8579-89fdc9b4be93
ISSN: 218979
DOI: 10.1063/1.4913938
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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