Abstract:
Acid mine drain is an important environmental problem faced by mining industry.At present, a large amount of research work on acid mine draine is focused on minimizing the impact of acid mine water on environment, and relatively little on analysis and investigation of rich and valuable resources recycling of acid mine draine.In addition, how to efficiently recycle valuable resources from acid mine draine is still a huge challenge.Therefore, this paper comprehensively and systematically summarizes the potential recyclable resources and technical applications of acid mine draine by reviewing the latest research results of acid mine draine resources and related technologies in various countries around the world.Potential recyclable resources of acid mine draine mainly include recycled water, sulfuric acid, metals and rare earth elements.The recycling of valuable resources can not only reduce its impact on environment and ecological security, but also provide a continuous supply for chemicals and energy, realize economic value to offset some of the governance costs.In addition, the recycling technologies of potentially valuable substances of acid mine draine mainly include adsorption method, biological adsorption method, membrane technology method and combined process.The combined process is the most ideal recycling technology, which can not only efficiently treat acid mine draine, but also realize the reuse of water and the recycling of valuable resources.On this basis, this review regards resource recycling and reuse as the sustainable governance goal of acid mine water, and finally highlights the problems and directions worthy of exploration of acid mine water in terms of resource utilization.