| Budget Amount *help |
¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Outline of Final Research Achievements |
Soil contamination by lead (Pb) is a prevalent environmental issue worldwide. During TEM-EDS analysis of Dixie clay artificially contaminated with Pb(II), we observed that Pb(II) was preferentially adsorbed and precipitated on the surface of TiO2. The objective of this study was to deepen the understanding of the mechanism and importance of this phenomenon, with the final objective of developing a novel remediation technologies using magnetic separation.
Our experimental results indicated that the precipitate preferentially formed on the surface of anatase was Pb(II) hydroxide or Pb(II) oxide. Additionally, sequential extraction analysis using the procedures we developed in this study showed that at least 32% and 42% of Pb(II) was sorbed onto anatase in the Dixie clay contaminated with a Pb content of 736 mg Pb/kg and 1,958 mg Pb/kg, respectively. Our experimental results also indicated that anatase in the kaolinte was coated by iron oxide resulting in increased magnetism.
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