Exploring a new fixation mechanism of radioactive Cs by biogenic Mn oxide

2015 Fiscal Year Final Research Report

• Project/Area Number: 26820410
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: YU QIANQIAN 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 先端基礎研究センター, 研究員 (90712018)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: Cs decontamination / biomaterial / Mn oxide / XAFS

Outline of Final Research Achievements

Mn oxide is known to be a scavenger for metallic ions in nature. By using radioactive Cs as an isotope tracer, this work investigated the sorption and desorption behavior of Cs on Mn oxides with different structures over a wide range of concentrations. Multiple sorption sites were observed on both layer and tunnel type Mn oxides. Trace amount of competitive ions located at the surface of biogenic birnessite affected Cs sorption at low concentrations. Sorption sites with high Cs affinity were observed on tunnel type Mn oxide, which implied their possible role on the fixation of Cs in environment.

Free Research Field

原子力学