Study on magnetic separation technique for contaminated water purification of nuclear power plants including radio active stainless steel fine particles

• Project/Area Number: 26630377
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Metal making/Resorce production engineering
• Research Institution: Niigata University
• Principal Investigator: Oka Tetsuo 新潟大学, 自然科学系, 教授 (40432091)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 超伝導材料・素子 / 磁性 / 水質汚濁・土壌汚染防止・浄化 / 廃棄物処理 / 反応・分離工学 / 環境負荷低減 / 磁気分離 / 高温超電導 / 浄水 / 冷凍機 / 極低温 / 磁化率 / 磁気力

Outline of Final Research Achievements

I had to develop radioactive pollution water or clean water technology to environmental water around. I aimed at a high purge of cleanliness of steel of the thin pollution water disposed in quantities. Aggregate coagulant is used for conventional water purification, but there is a fault that the radioactive materials increase by an additive in its quantity, and the magnetic separations for which an additive isn't used are effective. There are no environmental standards on stainless steel and no problems with existence in the water, but radiation chrome included in stainless steel will be a problem. Stainless steel is usually non-magnetic, and is not easily collected by usual permanent magnets, but the particles in which the distortion is once introduced, it becomes weak magnetic substance. An adhesion separation can be effective according to intense magnetic field. A particle has to estimate according to the state of various magnetizing conditions.

Research Products

• [Journal Article] Magnetic separation technique using high temperature superconducting bulk magnets and application to plating liquid waste treatment (2014)
  • Author(s): T. Oka, H. Fukazawa, N. Yoshizawa, Y. Takayanagi, J. Ogawa, S. Fukui, T. Sato, M. Ooizumi, M. Tsujimura, K. Yokoyama,
  • Journal Title: J. Jpn. Soc. Powder Powder Metallurgy Volume: 61
  • Peer Reviewed
• [Presentation] HTSバルク磁石を用いた硫酸ニッケル結晶のOGMS (2015)
  • Author(s): 高柳優也，町田祥平，一重佳奈，小川純，佐藤孝雄，大泉学，岡徹雄，横山和哉，辻村盛夫，
  • Organizer: 平成27年電気学会全国大会
  • Place of Presentation: 都市大学
  • Year and Date: 2015-03-25
• [Presentation] Recovering Nickel Element from The Plating Waste by Magnetic Separation Technique and High Temperature Superconducting Bulk Magnets (2014)
  • Author(s): T. Oka, Y. Takayanagi, S. Machida. K. Ichiju, J. Ogawa, S. Fukui, T. Sato, M. Ooizumi, M. Tsujimura, K. Yokoyama
  • Organizer: 5th International Forum on Magnetic Force Control
  • Place of Presentation: BEIJING
  • Year and Date: 2014-10-30 – 2014-10-31
• [Remarks] 無電解ニッケルめっき廃液からのニッケルの回収
  • URL: http://www.istec.or.jp/