The novel strains of cyanobacteria exhibit a fast and efficient 'biosorption' of rare earth elements, making recycling possible. Rare earth elements (REEs) are a set of 17 metallic elements that possess similar chemical properties. They earned their name due to their scarce occurrence in the Earth'
In the study, 12 cyanobacterial strains were examined for their ability to biosorb rare earth elements, as a sustainable alternative for bioremediation and metal recovery.
The novel strains of cyanobacteria exhibit a fast and efficient “biosorption” of rare earth elements, making recycling possible. Rare earth elements are a set of 17 metallic elements that possess similar chemical properties. They earned their name due to their scarce occurrence in the Earth’s crust, typically present in concentrations ranging from 0.5 to 67 parts per million. These elements play a crucial role in modern technology, including products such as LEDs, smartphones, electric motors, wind turbines, hard drives, cameras, magnets, and energy-efficient light bulbs.
Due to their scarcity and high demand, REEs can be quite costly. For instance, a kilogram of neodymium oxide currently has a price of around €200 , while terbium oxide is even more expensive at approximately €3,800 for the same amount. Currently, China holds a dominant position in the mining of REEs, with near-monopolistic control over the industry.
“Here we optimized the conditions of REE uptake by the cyanobacterial biomass, and characterized the most important chemical mechanisms for binding them. These cyanobacteria could be used in future eco-friendly processes for simultaneous REE recovery and treatment of industrial wastewater,” said Dr. Thomas Brück, a professor at the Technical University of Munich and the study’s last author.
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