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Bio-mineralization of rare earth elements

微生物による希土類元素の鉱物化

大貫 敏彦; Jiang, M.*; 宇都宮 聡*; 田中 万也*  

Onuki, Toshihiko; Jiang, M.*; Utsunomiya, Satoshi*; Tanaka, Kazuya*

土壌細菌の細胞表面においてSmがリン酸塩として沈殿することを見いだした。電子顕微鏡観察からSm-モナザイト様の鉱物であることがわかった。Smは細胞の官能基に吸着し、細胞内から供給されたリン酸と反応して鉱物化することを明らかにした。

We found that Sm(III) phosphate minerals were formed on the cells surface of gram negative bacterium after exposure of Sm(III) solution with the resting cells. TEM-SAED analysis showed that Sm-monazite was developed directly from the surface of cells. Sm(III) ions were first adsorbed by the functional groups of cells surface, followed by the chemical states change by the reaction with phosphate ions released from inside the yeast cells.

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