Bacteria could be the key to a safer, greener way of processing rare-earth metals

The word “bacteria” doesn’t exactly evoke positive images, but scientists at Cornell University recently discovered a novel way to replicate and use a bacterium from Oneida Lake in New York state. It’s called Shewanella oneidensis, and it has a special affinity for the rare-earth elements — such as so-called lanthanides, metals that are important for clean, renewable energy technology. The bacteria can be used to process rare-earth metals through a method called biosorption, which is considered safer and less taxing on the environment than current means of extraction. Marketplace’s Lily Jamali discussed the findings with Buz Barstow, a professor of biological and environmental engineering at Cornell and a lead researcher on the project.