Acid Lakes

Acid lakes are often the result of pyrite wheathering during mining activities. Acid mine water is characterized by low pH values ( -2 to 4) and elevated sulfate and iron concentrations. As consequence of the low pH values mine water may as well dissolve other elements such as Cd, Pb, As and  others. Interesting techniques we work on:

  • In-lake liming with calcite to control pH (calite ≠ calcite, inhibitors, strategies against re-acidification)
  • Lowering sulfate beyond gypsum equilibrium
  • Numerical modeling of thermodynamics and kinetics of water-gas-solid reaction (Phreeqc)
  • Monitoring lake drifts and water quality
  • Modeling drift and reactive transport in lakes (e.g. ELCOM-CAEDYM)