A recent study by researchers at Duke University’s Nicholas School of the Environment examined the water quality impacts of a historic lithium mine in North Carolina, specifically near Kings Mountain. The study, conducted by a team led by Avner Vengosh, distinguished professor of environmental quality, highlights the presence of elevated levels of lithium, rubidium and cesium in water associated with the mine site. Published in Science of the Total Environment, the findings provide important insights into how abandoned lithium mines may impact local water resources.
Contaminants and findings from the study
Investigation It was found that concentrations of common contaminants such as arsenic, lead, copper And nickel remained below standards set by the US Environmental Protection Agency (EPA). However, significant levels of lithium and less commonly found metals such as rubidium and cesium were identified in groundwater and nearby surface waters. These elements, while federally unregulated, were noted in concentrations unusual for natural water sources in the area.
one in statement Gordon Williams, lead author of the study and a PhD student at Duke University, told SciTechDaily that the findings raise questions about the potential health and environmental impacts of these metals. Laboratory tests simulating natural conditions also showed that mine waste materials did not contribute to harmful acidic runoff, a phenomenon often associated with mining operations such as coal extraction.
Future Lithium Exploration and Implications
The study highlights that while the impacts of legacy mining have been documented, the environmental impacts of active lithium extraction and processing have not been addressed. Vengosh reportedly said that processing methods, which include chemical treatments to extract lithium, could pose new challenges to water quality in the area if mining operations resume.
According to the report, efforts are now underway to expand the research to include assessment of drinking water quality in lithium-rich areas in North Carolina. By analyzing private wells and surface water, the researchers aim to provide more clarity on the long-term impacts of lithium mining on local water systems.