Application of HTS bulk magnet system to the magnetic separation techniques for water purification

Tetsuo Oka, H. Kanayama, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, T. Terasawa, Y. Itoh, R. Yabuno

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We have investigated the application of the HTS bulk magnets to the magnetic separation techniques for the waste water drained from the university laboratories. The study has been conducted in comparison with the electromagnets, and the cryo-cooled superconducting solenoid magnet. A superconducting bulk magnet has the highest value of the trapped magnetic fields at the centre of the sample surface, showing a sharp gradient of the magnetic field on the surface. Magnetic force acting on magnetic particles in magnetic fields is given by the product of a magnetization of particles and a gradient of magnetic field. The HTS bulk is superior to a solenoid magnet which has a poor gradient in magnetic fields in a bore. The separation ratios of ferrite precipitates in the waste slurry were estimated by means of the high gradient magnetic separation method which requires iron filters in the water channel and open gradient magnetic separation without any filters. The magnetic separation using HTS bulk magnet is substantially effective for the practical water purification.

Original languageEnglish
Pages (from-to)2128-2132
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume468
Issue number15-20
DOIs
Publication statusPublished - 2008 Sep 15
Externally publishedYes

Fingerprint

Magnetic separation
water treatment
Purification
Magnets
magnets
Magnetic fields
gradients
Water
Solenoids
solenoids
magnetic fields
trapped magnetic fields
filters
waste water
Aquaporins
Electromagnets
electromagnets
Ferrite
Precipitates
ferrites

Keywords

  • Bulk superconductor
  • Magnetic field generator
  • Magnetic separation
  • Trapped field magnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Application of HTS bulk magnet system to the magnetic separation techniques for water purification. / Oka, Tetsuo; Kanayama, H.; Fukui, S.; Ogawa, J.; Sato, T.; Ooizumi, M.; Terasawa, T.; Itoh, Y.; Yabuno, R.

In: Physica C: Superconductivity and its Applications, Vol. 468, No. 15-20, 15.09.2008, p. 2128-2132.

Research output: Contribution to journalArticle

Oka, T, Kanayama, H, Fukui, S, Ogawa, J, Sato, T, Ooizumi, M, Terasawa, T, Itoh, Y & Yabuno, R 2008, 'Application of HTS bulk magnet system to the magnetic separation techniques for water purification', Physica C: Superconductivity and its Applications, vol. 468, no. 15-20, pp. 2128-2132. https://doi.org/10.1016/j.physc.2008.05.234
Oka, Tetsuo ; Kanayama, H. ; Fukui, S. ; Ogawa, J. ; Sato, T. ; Ooizumi, M. ; Terasawa, T. ; Itoh, Y. ; Yabuno, R. / Application of HTS bulk magnet system to the magnetic separation techniques for water purification. In: Physica C: Superconductivity and its Applications. 2008 ; Vol. 468, No. 15-20. pp. 2128-2132.
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