[1A10-15] Environmental Remediation

[1A13] Novel restoration materials for clean-up of radionuclides in the environment

(1)Accumulation of Sr during formation of biogenic Ca-carbonate

*Toshihiko Ohnuki¹, Naofumi Kozai², Mitsuo Yamashita³, Takumi Horiike³, Yua Dotsuta³, Satoshi Utsunomiya⁴ (1. TITECH, 2. JAEA, 3. SIT, 4. Kyushu U.)

Keywords:Bioremediation, Sr, Biogenic minerals, Environmental contamination

We have studied the elimination of ⁹⁰Sr from sea water into biogenic calcite. Sr of 1 mM decreased up to 1/10 within 1 days. Electron microscopy and XAFS analyses elucidated the accumulation of Sr in the structure of Ca-carbonate.