A U.S. research initiative is developing new, nature-inspired methods for producing and recovering rare earth elements.
Rare earth elements are essential raw materials for many key technologies. Yet as global demand continues to rise, supply remains constrained because production is heavily concentrated in China. To reduce dependence on imports, researchers around the world are developing new extraction methods inspired by natural biological processes, including approaches based on proteins produced by microorganisms.
These proteins can selectively bind and release metal ions such as neodymium. The mechanism originates in microbial metabolism: certain microbes naturally produce specialized proteins that help them capture and utilize specific elements from their environment. Scientists believe this represents a largely untapped resource for recovering critical minerals more efficiently and sustainably.
This is precisely the focus of a joint project between the National Laboratory of the Rockies and the Pacific Northwest National Laboratory. The initiative is being supported with $2 million in funding from the U.S. Department of Energy.
The first phase of the project involves developing a machine-learning-based tool capable of identifying regions across the United States where microorganisms suitable for rare earth extraction may exist. The system will analyze geological, genetic, and environmental datasets, including soil chemistry and precipitation patterns. The identified microorganisms and their associated proteins will then be cataloged in a comprehensive atlas.
In a second step, the researchers plan to translate this knowledge into practical industrial applications. The identified proteins will be integrated into so-called bioseparation systems designed to efficiently extract rare earth elements from domestic waste streams such as electronic scrap and mining residues. The long-term objective is to establish a more sustainable and strategically independent supply chain for these critical materials.
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