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细菌对稀土元素的金属活动,这些细菌是由于煤矿开采而从酸性矿井排水中分离出来的

Stephanie Skeba¹, Morgan Snyder¹, Chris Maltman¹

¹Department of Biology, Slippery Rock University, Slippery Rock, PA 16057, USA.

|November 25, 2023

概括

一些细菌可以通过分泌的蛋白质称为金属孔收集稀土元素. 这项研究确定了八种具有这种能力的细菌分离物,为从受污染的地点恢复元素提供了潜力.

科学领域:

微生物学微生物学
环境科学环境科学
生物化学生物化学

背景情况:

微生物与金属的相互作用至关重要,已知细菌 siderophores 结合铁.
不太了解的是"金属"在隔离其他金属离子中的作用.
细菌收集各种金属的能力,特别是稀土元素,仍然在很大程度上未被探索.

研究的目的:

为了研究细菌金属孔对稀土元素的活性.
为了识别能够隔离稀土元素的细菌分离物.
描述细菌金属结合稀土元素的特异性.

主要方法:

使用Chromeazurol S测定检测 siderophore 和金属活动.
从煤矿排水受影响的地点选的细菌分离物.
对各种稀土元素的量化金属孔结合强度.

主要成果:

鉴定了八种细菌分离物,主要是*Pseudomonas*,表现出 siderophore 和 metallophore 活动.
对稀土元素表现出显著的金属孔活性,独立于离子半径或已知的*大肠杆菌*EC50值.
确立了稀土元素的特定约束性层次:Pr > Sc > Eu > Tm > Tb > Er > Yb > Ce > Lu > Sm > Ho > La > Nd > Dy > Gd > Y. 这就是为什么.

结论:

这是第一个报告细菌金属孔活性对稀土元素的研究.
细菌具有将各种稀土元素隔离起来的能力.
细菌金属孔为提取和回收关键稀土元素提供了一个新的途径.

关键词:

酸性矿井排水矿井排水煤炭开采煤炭开采煤炭开采金矿的金属化物稀土元素稀土元素稀土元素在 siderophore 的位置上.

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