Establishment of Technology for Microbial Accumulation of Rare Earth Elements.

稀土元素微生物积累技术的建立。

• 批准号: 04660111
• 负责人: KAWAI Keiichi
• 金额: $ 1.28万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04660111/
• 关键词: Rare Earths Accumulating Bacteria; Yttrium; Oligotrophic Bacteria; Rare Earths; Ytterbium; Yttrium Accumulating Bacteria; Ytterbium Accumulating Bacteria; 有用微量元素; 貧栄養細菌; オリゴトローフ; 希土類元素; Comamonas acidovorans; Variovorax paradoxus; 希土類元素集積菌

We established the screening system for rare earth elements accumulating bacteria. Oligotrophic bacteria which are able to grow on al/100 diluted nutrient agar were isolated. Each isolant was cultured in yttrium (Y,5 ppm) containing diluted nutrient broth. We obtained 7 strains (A-G) which could decrease Y below 2.5ppm.Strains B and D were identified as Comamonas acidovorans, and strain F was Variovorax paradoxus. The spectra of rare earth element accumulation were diferent each other among these isolants. There are two patterns on the mode of rare earth element accumulation. The one is the bacteria which accumulate from La to Nd, and the other is the bacteria which accumulate Tb, Dy, Ho and Er in addition of the above elements.Next, we screened Yb accumulating bacteria, which was used as a representative of heavy rare earths. We obtained 5 strains, in which 3 strains were actinomycetes. Strain 3-1 accumulated Yb specifically.These isolants are applicable to accumulation, separation and purification of rare earth elements.

建立了稀土富集菌的筛选体系。分离出能在al/100稀释营养琼脂上生长的寡营养细菌。将每种分离物在含有钇（Y，5 ppm）的稀释营养肉汤中培养。通过筛选，获得了7株（A-G）菌株，其中B和D菌株经鉴定为食酸丛毛单胞菌，F菌株为奇异食菌。稀土元素的富集光谱在这些孤立体中各不相同。稀土元素的富集方式有两种模式。一种是从La到Nd富集的细菌，另一种是除上述元素外还富集Tb、Dy、Ho和Er的细菌。共获得5株放线菌，其中3株为放线菌。菌株3-1对Yb有富集作用，这些分离菌株适用于稀土元素的富集、分离和提纯。

项目成果

Keiichi Kawai et al.: "Selective accumulation of rare earth elements by bacteria." Rare Earths. 26. (1995)

Keiichi Kawai 等人：“细菌选择性积累稀土元素。”

河合啓一: "微生物による希土類元素の選択的集積" 希土類. 26(発表予定). (1995)

Keiichi Kawai：“微生物对稀土元素的选择性积累”《稀土》26（待发表）。

Keiichi Kawai: "Selective Accumulation of Rare Earth.Elements by Oligotrophic Bacteria" The Third International Conference on Rare Earths Development & Applications. (1995)

河井敬一：“寡营养细菌对稀土元素的选择性积累”第三届国际稀土开发大会

Manjiro Kamijo et al.: "Screening of rare earth elements accumulating microorganisms." Nippon Nogeikagaku Kaishi. 68 (3). 608 (1994)

Manjiro Kamijo 等人：“筛选积累稀土元素的微生物。”

Keiichi Kawai: "Are there microorganisms which can accumulate rare earth elements?" Seibutsu-kougaku Kaishi. 73 (1). 45 (1995)

河合敬一：“有没有可以积累稀土元素的微生物？”