Mining effluents can be caused by:
• Wash waters.
• Flow Process acids.
• Water leaching, flotation and concentration.
• Effluents from refining and gas scrubbers.
A mine generates large amounts of highly concentrated wastewater due to contact between water and various types of minerals. The origin of these effluents can be found in the distinct processes undertaken in mining, in addition to drainage from rainfall.
Meanwhile, rain that infiltrates the tailings of the mine can also cause oxidation, hydrolysis, washing, etc. producing a highly contaminated wastewater.