2014/05/05 by Joel Z. Bandstra, Ying Li, Bandstra, Joel +3
Engineering · Environmental Science · #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Metal Extraction and Bioleaching #Mine drainage and remediation techniques #Tailings Management and Properties
paper · pdf · doi:10.48550/arxiv.1405.1338
openalex publication_date 2014/05/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Acid mine drainage (AMD) is the outflow of acidic water from metal mines or coal mines. When exposed to air and water, metal sulfides from the deposits of the mines are oxidized and produce acid, metal ions and sulfate, which lower the pH value of the water. An open limestone channel (OLC) is a passive and low cost way to neutralize AMD. The dissolution of calcium into the water increases the pH value of the solution. A differential equation model is numerically solved to predict the variation of concentration of each species in the OLC solution. The diffusion of Calcium due to iron precipitates is modeled by a linear equation. The results give the variation of pH value and the concentration of Calcium.