Combining ADR and lanmodulin for Dy separation from E-waste

two line graphs show Testing the LanM separation process with REO generated from end-of-life electric vehicle motors. Dissolved (HCl; pH 1) REO solution was adjusted to pH 3 and applied to LanM column until ~70% capacity was achieved (immediately prior to breakthrough). The column was subjected to a series of pH elution steps and the Nd, Pr, and Dy concentrations were determined using ICP-MS. The relative REE composition for each desorption step is indicated as % of total metal. — Testing the LanM separation process with REO generated from end-of-life electric vehicle motors. Dissolved (HCl; pH 1) REO solution was adjusted to pH 3 and applied to LanM column until ~70% capacity was achieved (immediately prior to breakthrough). The column was subjected to a series of pH elution steps and the Nd, Pr, and Dy concentrations were determined using ICP-MS. The relative REE composition for each desorption step is indicated as % of total metal.

CMI researchers from Ames National Laboratory and Lawrence Livermore National Laboratory conducted the research for this highlight.

Innovation
Lanmodulin (LanM) enables single-stage Dy upgrade from mixed rare earth oxides (REO).

Achievement
Upgraded Dy content from mixed REO prepared from Nissan Leaf and Chevy Volt motors using Acid-free Dissolution Recycling (ADR) process (FA 3.3.13). In a single adsorption/desorption cycle, Dy content upgraded from 13% to 66% with Nissan sample and 25% to 91% with Chevy sample.

Significance and Impact

Demonstrated potential to link ADR and bio-based separation processes, meaning that a larger fraction of REE production flow sheet can use environmentally friendly approaches.
Anticipate that a second column step could further upgrade Dy content to 99+% purity.

Hub Target Addressed
Sustainable method for REE recycling from end-of-life consumer products.