Closed-loop magnetic separation of nanoparticles on a packed bed of spheres / Magnet Cecilia,Akouala Mesferdon,Kuzhir Pavel,Bossis Georges,Zubarev Andrey,Wereley Norman M. // JOURNAL OF APPLIED PHYSICS. - 2015. - V. 117, l. 17.

ISSN/EISSN:

0021-8979 / 1089-7550

Type:

Article

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, K, defined through the ratio of the inlet-to-outlet concentration shows a power-law dependency on Mason number, Lambda proportional to Ma(-0.83), in the range of 10(2) < Ma < 10(4). 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. (C) 2015 AIP Publishing LLC.

Author keywords:

FLOW; FILTRATION; PARTICLES

DOI:

10.1063/1.4913938

Web of Science ID:

ISI:000354984100286

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAY 7
Publisher	AMER INST PHYSICS
Address	1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Language	English
Article-Number	17C719
EISSN	1089-7550
Keywords-Plus	FLOW; FILTRATION; PARTICLES
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
Author-Email	kuzhir@unice.fr
ORCID-Numbers	Wereley, Norman M./0000-0002-9932-6988 Kuzhir, Pavel/0000-0001-7089-6197
Funding-Acknowledgement	CNRS/Ural Federal University {[}PICS 6102]
Funding-Text	This work has been supported by the Project PICS 6102 CNRS/Ural Federal University.
Number-of-Cited-References	12
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	20
Journal-ISO	J. Appl. Phys.
Doc-Delivery-Number	CI7YW