Origin and source control technologies of acid mine drainage

The treatment of acid mine drainage (AMD) is difficult in environmental remediation process, due to its big yield, long formation time and dispersed place of production. This paper introduced sources and harms of AMD and summarized source control technologies, such as covering, fungicide, surface passivation and neutralizing treatment by separating metal sulphides from air, inhibiting microbial activity and reducing the activity of iron. However, these technologies had some disadvantages, such as easy oxidation of covering material, fungicide efficiency affected by environment extremely, pre oxidation and limited species of passivation agent, low efficiency of mixed neutralizing agent. The future treatment of AMD will be focusing on developing new bactericide, passivation agent to carry out scientific treatment by combining technologies of source control, monitoring of water quality and quantity and end treatment.