Fig. 2 | Scientific Reports

Fig. 2

From: Iron, aluminum, and thorium impurity removal from a rare earth element pregnant leach solution using magnesium carbonate

Fig. 2

Thermodynamic modeling of the system using OLI software. (a) Solubility of Nd2(CO3)3 in water as a function of temperature in the range of 25–90 °C. (b) Solubility of Nd2(CO3)3 in water as a function of pH in the range of 2.5–7 at 25 °C. (c) Solubility of Al(OH)3, Fe(OH)3, and Th(OH)4 in water as a function of temperature in the range of 25–90 °C. (d) Solubility of mixed Al(OH)3, Fe(OH)3, and Th(OH)4 in water as a function of pH in the range of 1–7 at 25 °C. The HCl and MgCO3 were used as the pH adjusters.

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