Method for treating ionic rare-earth in-situ leaching waste land in red soil region

Abstract

The invention relates to a method for treating ionic rare-earth in-situ leaching waste land in a red soil region; the method comprises the steps of (1) performing land consolidation on a slope of the rare-earth in-situ leaching waste land to eliminate the slope in order for building steps or terraces; (2) building drainage measures at the slope of the rare-earth in-situ leaching waste land; (3) building ridges at the edge of the rare-earth in-situ leaching waste land; (4) performing soil improvement on the rare-earth in-situ leaching waste land; (5) broadcasting grass seeds to the slope, steps or terraces of the rare-earth in-situ leaching waste land; (6) planting shrubs at the slope bottom and steps or terraces of the rare-earth in-situ leaching waste land, and planting trees in a leaching tank. The method achieves water and soil maintaining and can also improve ecological environment; the method is simple, has low cost, is simple to perform, has sustainable restoration effect; the method is suitable for popularization and application in the treatment of ionic rare-earth ore waste lands in southern red soil eroded regions.

Description

technical field [0001] The invention relates to a method for treating the waste land of ionic rare earth leaching in situ in the red soil area. Background technique [0002] Ion-adsorption rare earth ore is a unique new type of rare earth deposit in my country, which is mainly distributed in the red soil erosion areas in Jiangxi, Guangdong, Hunan, Guangxi, Fujian and other southern regions of China. At present, these rare earth resources are mostly distributed in areas with serious soil erosion, with the characteristics of shallow ore body coverage and loose ore. Ionic rare earth mines mostly adopt the pool leaching process for rare earth production, that is, the excavated clay is transported to the pool for leaching, resulting in a large amount of leaching waste. Rare earth mines have been excavated, transported, and flooded, destroying the original soil structure, which can easily cause serious water and soil erosion and deterioration of the ecological environment. There...

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Problems solved by technology

However, due to the destruction of the soil structure and the loss of soil nutrients in the rare earth in-situ leaching abandoned land, there are also problems such as low acidity and heavy metal pollution, so the choice of vegetation restoration mode in the treatment process is very important, otherwise the treatment effect cannot be achieved

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