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

• 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
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: Cs decontamination / biomaterial / Mn oxide / XAFS / *Cs decontamination

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.

Research Products

• [Journal Article] Fungus-promoted transformation of lanthanides during the biooxidation of divalent manganese. (2016)
  • Author(s): Yu, Q., Ohnuki, T., Tanaka, K., Kozai, N., Yamasaki, S., Sakamoto, F. and Tani, Y.
  • Journal Title: Geochim. Cosmochim. Acta Volume: 174 Pages: 1-12
  • DOI: 10.1016/j.gca.2015.11.004
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Microwave-assisted synthesis of nanocrystalline lithium-ion sieve from biogenic manganese oxide: Effect of crystalline phase and morphology on the lithium adsorption capacity (2016)
  • Author(s): Qianqian Yu, Keiko Sasaki
  • Journal Title: Hydrometallurgy Volume: 未定 Pages: 118-124
  • DOI: 10.1016/j.hydromet.2015.10.002
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Sorption of trivalent cerium by a mixture of microbial cells and manganese oxides: Effect of microbial cells on the oxidation of trivalent cerium. (2015)
  • Author(s): Ohnuki, T., Jiang, M., Sakamoto, F., Kozai, N., Yamasaki, S., Yu, Q., Tanaka, K., Utsunomiya, S., Xia, X., Yang, K., He, J.
  • Journal Title: Geochim. Cosmochim. Acta Volume: 163 Pages: 1-13
  • DOI: 10.1016/j.gca.2015.04.043
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] In situ X-ray diffraction investigation of the evolution of a nanocrystalline lithium-ion sieve from biogenic manganese oxide. (2014)
  • Author(s): Yu, Q.; Sasaki, K.,
  • Journal Title: Hydrometallurgy Volume: 150 Pages: 253-258
  • DOI: 10.1016/j.hydromet.2014.07.002
  • Peer Reviewed
• [Presentation] The role of microorganisms in activation of manganese oxidants for enhanced oxidative removal of Co(II) (2016)
  • Author(s): Qianqian Yu
  • Organizer: 28th ASRC workshop
  • Place of Presentation: Japan Atomic Energy Agency (Tokai-mura, Ibaraki)
  • Year and Date: 2016-02-25
  • Int'l Joint Research
• [Presentation] Microbe activity promoted transformation of lanthanide and actinide (2015)
  • Author(s): Qianqian Yu
  • Organizer: 第3回日中大学間核燃料サイクル学術討論会
  • Place of Presentation: Tokyo Institute of Technology (Meguro-ku, Tokyo)
  • Year and Date: 2015-12-01
  • Int'l Joint Research
• [Presentation] Effect of Live Acremonium strictum KR21-2 Fungus on the Mobility of REEs During the Bio-Oxidation of Mn(II) (2015)
  • Author(s): Qianqian Yu
  • Organizer: 249th ACS National Meeting
  • Place of Presentation: Denver, CO, U.S.A.
  • Year and Date: 2015-03-21 – 2015-03-26
• [Presentation] Fungus activity promoted transformation of REEs during bio-oxidation of Mn(II) (2015)
  • Author(s): Qianqian Yu
  • Organizer: 15th ASRC workshop
  • Place of Presentation: Nantes, France
  • Year and Date: 2015-01-11 – 2015-01-12
• [Presentation] Adaptive interactions between Live Acremonium strictum KR21-2 Fungus and REEs during Mn(II) bio-oxidation (2014)
  • Author(s): Qianqian Yu
  • Organizer: 日本地球化学学会
  • Place of Presentation: 富山大学
  • Year and Date: 2014-09-16 – 2014-09-18
• [Book] Synthesis of a biotemplated lithium ion-sieve derived from fungally formed birnessite, Chapter in "Advances in the Environmental Biogeochemistry of Manganese Oxides" (2015)
  • Author(s): Sasaki, K.; Yu, Q.,
  • Total Pages: 16
  • Publisher: ACS Books