Acid mine drainage is a global problem with significant environmental impacts. Groundwater flows through open mine shafts running past rocks containing minerals, salts and metals. These materials leach into the flowing water, this changes the colour, pH and pollutes the water to a hazardous level. Acid Mine Drainage water is generally stored in large lagoons near the mines it derives from, this water is treated conventionally using the mineral lime. Lime corrects the pH and precipitates the metals and salts from the water, however the sludge containing these precipitated materials is harmful and costly to dispose of.