Title :
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
fDate :
6/1/2004 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830718
