Home |  News |  Conferences |  Commodities |  Publications |  Business Directory |  Resources |  Help
Go to the MEI Online homepage

Search Site:

MEI Online: Biotechnology: Latest News: June 29th 2016


Click for more info on Biomining '21


:: Bacteria to Separate Rare Earths Cleanly


In Rare-Earth Separation Using Bacteria, William D. Bonificio and David R. Clarke of the Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, 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 behaviour. 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.




Select the list(s) you'd like to join below, enter your email address, choose a content format and click "Join."
[more info]

MEI Online Update
MEI Online Job Vacancies


© 1998-2017, Minerals Engineering International

Email: amanda@min-eng.com