Rare-Earth Separation Using Bacteria
Rare-Earth Separation Using Bacteria
复制标题
DOI：
10.1021/acs.estlett.6b00064
复制
发表时间：
2016-04-01
影响因子：
10.9
通讯作者：
Clarke, David R.
中科院分区：
文献类型：
--
作者：
Bonificio, William D.;Clarke, David R.
稀土元素对于许多绿色能源技术至关重要，但由于它们的化学相似性而难以相互分离。我们展示了一种基于玫瑰杆菌属细菌吸附镧系元素的替代生物方法。 AzwK-3b，固定在分析过滤器上，随后根据 pH 值进行解吸。洗脱解吸数据表明，单个镧系元素的碱性对于决定其解吸行为很重要。研究发现，通过细菌的预质子化，只需两次即可将每种稀土元素浓度相等的溶液浓缩至三种最重稀土元素（Tm、Lu 和 Yb）的近 50%。这超越了现有的工业实践。研究结果表明，有机会利用细菌表面化学的多样性，以环境友好的方式分离和回收技术上重要的稀土金属。
The rare-earth elements are critical to many green energy technologies but are difficult to separate from one another because of their chemical similarity. We demonstrate an alternative, biogenic method based on the adsorption of lanthanide to the bacterium Roseobacter sp. AzwK-3b, immobilized on an assay filter, followed by subsequent desorption as a function of pH. The elution desorption data suggest that the basicity of the individual lanthanides is important in determining their desorption behavior. It is found that via preprotonation of the bacteria it is possible to concentrate a solution of equal concentrations of each lanthanide to nearly 50% of the three heaviest lanthanides (Tm, Lu, and Yb) in just two passes. This surpasses existing industrial practice. The findings suggest that there is an opportunity to harness the diversity of bacterial surface chemistry to separate and recover technologically important rare-earth metals in an environmentally benign manner.