The plan on using Direct Lithium Extraction Technology:  DLE

https://www.mining.com/how-cornish-lithium-plans-to-produce-lithium-with-a-net-zero-footprint/?utm_source=Daily_Digest&utm_medium=email&utm_campaign=MNG-DIGESTS&utm_content=how-cornish-lithium-plans-to-produce-lithium-with-a-netzero-footprint

Following the announcement of the UK government’s plans to invest in Geothermal Engineering and Cornish Lithium’s deep geothermal project in Cornwall, Jeremy Wrathall, CEO of the junior mining company, provided details on their plans to establish an optimal method of lithium extraction at the site.

“We will be collaborating with Geothermal Engineering to take water from their deep geothermal well and trial it through the pilot plant,” Wrathall told MINING.COM. “The pilot plant aims to extract lithium using Direct Lithium Extraction (DLE) technology which essentially sieves the lithium out of the water – leaving behind the water as it was before – but without the lithium content. This is then reinjected into the ground via boreholes.”

DLE is further explained in the link below from an article back in 2019:

https://finfeed.com/features/explainer-overview-direct-lithium-extraction-dle-geothermal-brines/