Environmental and sustainbility aspects of Direct Lithium Extraction

Environmental performance has become a central factor in lithium‑project development as water availability, land use, and long‑term ecosystem impacts are increasingly scrutinized by regulators, communities, and investors. Conventional lithium recovery from brines — particularly through evaporation‑pond systems — can place significant pressure on natural resources due to large surface areas, extended residence times, and high water losses.

Direct Lithium Extraction (DLE) has been developed as an alternative approach that supports more sustainable lithium recovery by reducing water consumption, minimizing land occupation, and enabling closed‑loop brine management. These characteristics make DLE an important technology for aligning lithium production with modern environmental and social expectations.

Water management and reduced consumption

• Elimination of evaporation losses

Traditional evaporation‑based lithium extraction relies on natural water evaporation to concentrate lithium salts, resulting in the permanent loss of large water volumes. DLE systems avoid this step entirely by extracting lithium directly from the liquid phase. As a result, total water consumption is significantly reduced, particularly in arid regions where brine extraction often competes with limited freshwater resources.

• Closed‑loop water use

Many DLE configurations allow treated brine to be reinjected into the reservoir following lithium removal. This approach supports circular water management, maintaining the hydraulic balance of the brine system and reducing surface discharge volumes. Closed‑loop operation also limits long‑term depletion of underground brine resources.

Reduced land footprint

• Compact facilities

Evaporation ponds may cover several square kilometers depending on production capacity. In contrast, DLE installations consist of modular process units concentrated within a much smaller industrial footprint. Compact layouts reduce disturbance to surrounding landscapes and simplify site remediation at the end of project life.

Illustration of membrane pressure vessels for water purification

• Applicability to industrial sites

Because DLE does not require large surface ponds, it can be integrated into existing industrial facilities such as geothermal plants or oil and gas operations. This reuse of established infrastructure further limits land transformation and environmental impact.

Brine reinjection and environmental stability

Reinjecting treated brine after lithium extraction helps preserve the original chemical and volumetric characteristics of subsurface reservoirs. This minimizes changes to groundwater flow patterns and reduces long‑term risks associated with large‑scale brine removal.

By avoiding extensive open‑air brine handling, DLE reduces the formation of salt residues and limits exposure of hypersaline fluids to surrounding soil and ecosystems. This contributes to improved environmental stability in sensitive regions.

Chemical and energy efficiency

• Improved selectivity

DLE technologies selectively target lithium, reducing the need for intensive downstream purification and excessive reagent consumption. Improved selectivity lowers the overall chemical footprint of lithium production.

• Energy integration opportunities

When applied to geothermal brines, DLE can be combined with existing heat and power systems. This integration supports energy efficiency and reduces the carbon intensity of lithium recovery by leveraging renewable energy sources already available on site.

Alignment with ESG and regulatory frameworks