Adsorption behaviors of cesium and selenium on biogenic iron oxyhydroxides

2016 Fiscal Year Final Research Report

• Project/Area Number: 15H06903
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: KIKUCHI Sakiko 国立研究開発法人海洋研究開発機構, 次世代海洋資源調査技術研究開発プロジェクトチーム, ポストドクトラル研究員 (50758852)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Keywords: ferrihydrite / biogenic ferrihydrite

Outline of Final Research Achievements

This study compared cesium and selenium adsorptions between biogenic iron oxyhydroxides (BIOS) and synthetic ferrihydrite. Compared to synthetic ferrihydrite, BIOS showed enhanced adsorption for positively-charged cesium whereas decreased adsorption for negatively-charged selenium. This different adsorption of cesium and selenium on BIOS from synthetic ferrihydrite can roughly be explained by the electrostatic effect. On the other hand, adsorption of selenate on BIOS was more strongly inhibited compared to that of selenite, which can be explained by the different mode of attachment on the surface of BIOS.

Free Research Field

生物地球化学