Application of Magnesium Sulfate in In-Situ Leaching of Rare Earth Elements: Mechanisms, Performance and Environmental Implications
Ion-adsorption clay deposits are among the most important sources of heavy rare-earth elements (REEs), particularly in southern China, where extraction is commonly performed by in situ leaching (ISL) using ammonium salts. Although ammonium sulfate and related lixiviants achieve high extraction efficiencies via ion-exchange mechanisms, their large-scale use has raised significant environmental concerns, including ammonium contamination, […]
