Removal system of arsenic from geothermal water by high gradient magnetic separation-HGMS reciprocal filter

Hidehiko Okada, Yasuo Kudo, Hiroshi Nakazawa, Akihiko Chiba, Kazunari Mitsuhashi, Takeshi Ohara, Hitoshi Wada

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

We have developed a High Gradient Magnetic Separation (HGMS) system to remove arsenic from geothermal water and to supply hot water for public use by using a superconducting magnet. We attained the reduction of arsenic concentration to 0.015 mg/L that is less than the standard for discharge of 0.1 mg/L and slightly larger than the environmental standard of 0.01 mg/L in Japan. The system consists of a pretreatment process that adds extra magnetization to arsenic by chemical reaction, and a reciprocal HGMS filter using a superconducting magnet that extracts magnetized arsenic from the geothermal water. We present the experimental results of the removal system.

Original languageEnglish
Pages (from-to)1576-1579
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume14
Issue number2
DOIs
Publication statusPublished - 2004 Jun
Externally publishedYes

Keywords

  • Arsenic
  • Geothermal water
  • High gradient magnetic separation
  • Superconducting magnet

ASJC Scopus subject areas

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

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