Lithium Ion Batteries Linked to Increasing PFAS Pollution, Study Finds

A new study by Texas Tech University has raised concerns about the environmental impact of lithium-ion batteries, highlighting their role in the rising Pollution levels of per- and poly-fluoroalkyl substances (PFAS) in both air and water. This research, led by Associate Professor Jennifer Guelfo, was recently published in the journal Nature Communications.

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The focus of the study was on a specific subclass of PFAS known as bis-perfluoroalkyl sulfonimides (bis-FASIs), which are used in the production of lithium-ion batteries. These compounds are not only persistent in the environment but also exhibit ecotoxicity on par with well-known pollutants like perfluorooctanoic acid (PFOA). Lithium-ion batteries, crucial for powering electric vehicles and various electronic devices, are expected to see a significant rise in demand over the next decade.

The team conducted extensive environmental sampling around battery manufacturing sites in Minnesota, Kentucky, Belgium, and France. Their findings indicated alarmingly high levels of bis-FASIs in air, water, soil, and even snow. Notably, emissions from these sites were found capable of long-range transport, potentially impacting regions far from the source of pollution.

Additionally, studies at several U.S. municipal landfills revealed that the disposal of products containing lithium-ion batteries is another pathway through which these pollutants enter the environment. Ecotoxicity tests showed that exposure to bis-FASI levels similar to those found near manufacturing sites adversely affected the behavior and metabolic processes of aquatic organisms.

Despite the persistence of bis-FASIs, the study also brought some positive news regarding their treatability. Techniques like granular activated carbon and ion exchange, currently used to mitigate other PFAS types in drinking water, were effective against bis-FASIs as well. This discovery comes at a crucial time as treatment facilities prepare to meet the Environmental Protection Agency’s stringent new standards for PFAS levels.

This research underscores a critical challenge facing the clean energy sector: advancing technologies like electric vehicles is vital for reducing carbon emissions, but it must not come at the cost of increasing hazardous pollution. The study advocates for a balanced approach, promoting the collaboration of scientists, engineers, sociologists, and policymakers to ensure that the adoption of new energy technologies minimizes environmental risks.

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