Ecological ditch for treating ion type rare earth mine in-situ mineral leaching lixiviums

Abstract

The invention provides an ecological ditch for treating ion type rare earth mine in-situ mineral leaching lixiviums. The ecological ditch comprises a multi-level ecological infiltration dam, a multi-level water fall dam and a plant ditch. The multi-level water fall dam is arranged at the downstream position of the multi-level ecological infiltration dam. The pH value of river water is increased through filter materials in an ecological infiltration dam body of the ecological ditch, a good habitat condition is provided for aquatic plants, the surfaces of the filter materials are covered with anecological pad, aquatic plants are cultured on the ecological pad, waste water is purified, and the content of ammonia nitrogen is reduced. The multi-level water fall dam is arranged behind the infiltration dam, after pebbles are evenly embedded in the surface of the water fall dam and aeration oxygenation is conducted, water enters the plant ditch, plant absorption and microbial decomposition are conducted so that the ecological environment in water can be further purified and repaired, the pH value of the waste water can be effectively increased through the ecological ditch, the water bodyoxygen content is increased, ammonia nitrogen is degraded and adsorbed, water and soil losses can be reduced, sediments can be intercepted, the staying time of the water body in the ditch can be prolonged due to existence of the plants, and the ammonia nitrogen is further removed and decomposed.

Description

technical field [0001] The invention relates to the field of water quality purification and ecological restoration of in-situ leaching liquid from ionic rare earth mines, and in particular to an ecological ditch for treating in-situ leaching liquid from ionic rare earth mines. Background technique [0002] At present, there are three types of mining and dressing industries for ion-type rare earth ores: pool leaching, heap leaching and in-situ leaching. Although the in-situ leaching process of ion-type rare earth ore is currently the most environmentally friendly mining mode of ion-type rare earth, the environmental problems caused by it are still relatively serious. Soaking the mountain with ammonium sulfate solution for a long time will damage the surface vegetation through lateral seepage and capillary action. The ammonium sulfate remaining in the mountain will pollute the soil, surface water and groundwater in the mining area and surrounding environment through leaching a...

AI Technical Summary

Problems solved by technology

Although the in-situ leaching process of ion-type rare earth ore is currently the most environmentally friendly mining mode of ion-type rare earth, the environmental problems caused by it are still relatively serious. Soaking the mountain with ammonium sulfate solution for a long time will damage the surface vegetation through lateral seepage and capillary action. The ammonium sulfate remaining in the mountain will pollute the soil, surface water and groundwater in the mining area and surrounding environment through leaching and infiltration

Among them, the leaching liquid enters the environment in the form of surface water excretion, resulting in acidic surface water and high ammonia nitrogen content, destroying the living environment of microorganisms, organisms, and plants in the water, and greatly reducing biodiversity

[0003] At present, ecological ditches are mostly aimed at ammonia-nitrogen-polluted water bodies with pH values ​​in the range of 6-9, and are mostly used for non-point source pollution control in farmland ecosystems. However, ionic rare earth mine wastewater has the characteristics of high ammonia nitrogen concentration and acidity, and traditional ecological ditches do not. Consider the treatment of water body pH, its impact on aquatic organisms and its ammonia nitrogen treatment effect

Images