Fig. 2: Solubility vs. temperature trends for dissolved species and initial leachate metal concentrations.

a Molal solubility limits vs. temperature for DME81 (at sufficient pressure to condense a liquid DME phase) and metal sulfates contained in the two studied permanent magnet leachates in the temperature range from 10–50 °C73,74,75. ICP-OES measurement of metal concentrations in the b Sm-Co magnet leachate and c Nd-Fe-B mixed magnet leachate. Source data are provided as a Source Data file.