Читать книгу Application of Nanotechnology in Mining Processes - Группа авторов - Страница 20

Acid mine drainage is a complex effluent characterized by low pH with multiple leached ions depending on their geological formation. The key to recovering these metal ions from waste is based on the fundamental understanding and characterization of the solution chemistry for any given mining site. The use of PAMAM-COOH@MNPs for REEs recovery is very critical as it will stop further production of sludge and adsorb multiple metal ions on their surfaces within the acidic medium. Figure 1.4 is a general representation of the procedure to recover REEs from AMD. However, this design will consider AMD with a high concentration while noting the presence of sulfate ions as the main anion load present in the solution. All the chemical species present in the AMD are mostly available in their oxidized state. The design consists of different stages called reactors, which will be described accordingly with supportive chemical equations to quantify each stage.

Figure 1.4 Systematic representation of the proposed processes for the recovery of REEs and water from ARD heavily laden with metals.