Edinburgh team uses bacteria to recycle rare metals from batteries

Scientists at the University of Edinburgh are pioneering a novel approach to tackle climate change by utilizing bacteria to extract rare metals from old batteries and electronic waste. This initiative is crucial as these metals, including lithium, cobalt, and manganese, are essential for the production of green technologies such as electric cars, solar panels, and wind turbines. Professor Louise Horsfall emphasizes the growing dependence on these metals as society shifts away from petrochemicals towards electricity-based solutions for heating and transportation. The research highlights the importance of developing a circular economy to prevent the depletion of finite metal resources. By reusing and recycling these materials, the team aims to mitigate the environmental impact of waste and promote sustainability. The bacteria used in this process are naturally occurring and have the unique ability to synthesize metal nanoparticles, which they do as a detoxification mechanism. The team has successfully extracted various metals from electronic waste, starting with manganese, followed by nickel and lithium, and later cobalt and nickel using different bacterial strains. This innovative method not only addresses the issue of waste but also opens up possibilities for reintroducing these metals into the manufacturing process for new green technology devices. Looking ahead, the next phase of the research will involve demonstrating that the extracted metals can be effectively utilized in the production of new batteries and devices. This step is vital for establishing a sustainable model for recycling and ensuring compliance with upcoming legislation that mandates the use of recycled metals in green technology manufacturing.