Elucidation of the scale prevention effect by alternating magnetic treatment

Senshin Umeki, T. Kato, H. Shimabukuro, N. Yoshikawa, Shoji Taniguchi, Kazuyuki Tohji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Process industry remains skeptical of the effect of scale prevention in a water pipe by magnetic treatment despite its long history. In this study, mechanism of scale prevention by "alternating" magnetic treatment was investigated. Using suspensions of non-magnetic colloid particles (TiO 2 or CaCO3) dispersed in an electrolytic solution, we investigated zeta potential changes of the particles by imposition of alternating magnetic field with a specific frequency. Consequently, we found that the specific frequency treatment (several kHz) changes the zeta potential of particles drastically with an inversion of sign. This phenomenon obviously depends on the frequency. It is considered to be due to the specific adsorption of anions, that were easily adsorbed, in the solution onto the particles interface. From the experimental results, we concluded the mechanism of scale prevention by the treatment as follows: Normally, a surface of inner wall of a water pipe has negative charge and surface of scale particles in water has positive charge. So the particles are attracted by the water pipe and are attached to it. After the treatment, surface potential of the particles shifts to negative side, then repulsive force is formed between the particles and the wall.

Original languageEnglish
Title of host publicationWATER DYANMICS
Subtitle of host publication4th International Workshop on Water Dynamics
Pages170-174
Number of pages5
DOIs
Publication statusPublished - 2007 May 11
Event4th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2006 Nov 72006 Nov 8

Publication series

NameAIP Conference Proceedings
Volume898
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other4th International Workshop on Water Dynamics
CountryJapan
CitySendai
Period06/11/706/11/8

Keywords

  • Interface potential
  • Magnetic treatment
  • Scale
  • Water
  • Zeta potential

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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