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Remediation method of ionic type rare earth tailings soil

An ionic rare earth and restoration method technology, which is applied in the field of ionic rare earth tailings mine soil restoration, can solve problems such as low vegetation coverage, soil erosion, soil desertification, etc., achieves degradation of residual ammonia nitrogen content, and promotes absorption and degradation of heavy metals. effect of concentration

Pending Publication Date: 2021-10-29
天津市滨海新区环境创新研究院
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Problems solved by technology

Nowadays, the abandoned ionic rare earth mines have a large area and low vegetation coverage, serious water and soil erosion, serious soil desertification and acidification, and major pollutants such as heavy metals and ammonia nitrogen exceed the standard, which seriously threatens the lives and health of residents in surrounding areas. Ecological restoration is even more urgent

Method used

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Embodiment Construction

[0014] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the best embodiments. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.

[0015] The present invention comprises the steps:

[0016] a. Collect biocrust samples of the soil to be remediated. Specifically, the sampling area of ​​the biological crust sample is determined by the transect method, the surface of the sampling area is wetted with distilled water, and the biological crust sample is collected. Wetting the soil with distilled water ensures that the integrity of the sample is maintained during collection and transport.

[0017] b. Separating and purifying the biological crust sample and culturing it to obtain nitrogen-fixing...

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Abstract

The invention relates to a remediation method of ionic type rare earth tailings soil. The method comprises the following steps: collecting a biological crust sample of soil to be repaired; separating and purifying the biological crust sample, and culturing to obtain nitrogen-fixing cyanobacteria; carrying out propagation culture on nitrogen-fixing cyanobacteria to obtain cyanobacteria crust algae liquid; carrying out propagation culture on the AM fungus inoculant; and treating to-be-restored soil through the cyanobacteria crust algae liquid and the AM fungus fungicide subjected to propagation culture, and sowing pioneer plants. The biological soil crust, AM fungi and pioneer plants are combined to improve the soil in the ionic rare earth waste tailing area, enhance the water binding capacity of the soil, reduce the concentration of heavy metals and ammonia nitrogen in the soil and improve the fertilizer retention capacity of the soil.

Description

technical field [0001] The invention relates to the technical field of ecological restoration, in particular to an ion-type rare earth tailings soil restoration method. Background technique [0002] Ionic rare earth ore is an important strategic resource of the country. It is widely used in national defense, medical and high-tech fields. It has undergone three processes: pool leaching, heap leaching and in-situ leaching. Elements became the main method of mining. Vegetation destruction, soil desertification, increased desertification area, and soil erosion are the direct manifestations of the damage to the soil ecological structure and function in the abandoned mine tailings area. The changes in the composition and diversity of the microbial community are the microscopic manifestations of human activities. Mining activities affect the physical and chemical properties of the mining area and surrounding soil and water bodies to varying degrees, such as heavy metals such as ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 师艳丽张依章闫祯乔丽丽陈振宇平令文
Owner 天津市滨海新区环境创新研究院
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