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

Author

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

Author_Institution

Ind. Promotion Center, Adv. Sci. & Technol. Inst. of Iwate, Morioka, Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1576

Lastpage

1579

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.

Keywords

arsenic; chemical reactions; magnetic separation; magnetisation; superconducting magnets; water; water pollution; water supply; water treatment; Japan; arsenic concentration; arsenic removal system; chemical reaction; environmental standard; geothermal water; high gradient magnetic separation; hot water supply; magnetization; magnetized arsenic; pretreatment process; reciprocal filter; superconducting magnet; Chemical processes; Geothermal power generation; Iron; Magnetic materials; Magnetic separation; Magnetization; Superconducting filters; Superconducting magnets; Water heating; Water storage; Arsenic; geothermal water; high gradient magnetic separation; superconducting magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830718

Filename

1325102