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

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 m...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2004-06, Vol.14 (2), p.1576-1579
Main Authors: Okada, H., Kudo, Y., Nakazawa, H., Chiba, A., Mitsuhashi, K., Ohara, T., Wada, H.
Format: Article
Language:English
Subjects:
Applied sciences
Arsenic
Chemical engineering
Chemical processes
Chemical reactions
Crystallization, leaching, miscellaneous separations
Exact sciences and technology
Geothermal
Geothermal power generation
Hot water
Iron
Magnetic materials
Magnetic separation
Magnetization
Superconducting filters
Superconducting magnets
Superconductivity
Water heating
Water storage
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Summary: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.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2004.830718