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Ionic type rare earth abandoned mining area soil remediation method

A technology of ion-type rare earth and restoration method, which is applied in the field of soil restoration in abandoned mining areas of ion-type rare earth, can solve problems such as water and soil loss, and achieve the effects of easy construction, good vegetation ecological restoration effect, huge application prospects and market demand

Active Publication Date: 2021-06-11
JIANGXI ACAD OF ECO-ENVIRONMENTAL SCI & PLANNING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned rare earth mine restoration technology only uses microorganisms and plants, and does not consider the soil restoration technology of waste rare earth tailings sand matrix, which needs to solve the problems of water and soil loss, soil property restoration and Cd removal at the same time. There are few technical studies on regional governance

Method used

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  • Ionic type rare earth abandoned mining area soil remediation method
  • Ionic type rare earth abandoned mining area soil remediation method
  • Ionic type rare earth abandoned mining area soil remediation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Location: An abandoned rare earth tailings area (24°53′33.40"N, 115°40′34.76"E) in Shangjia Village, Xunwu County, Ganzhou City, Jiangxi Province. The altitude is 302m. The experimental site has a greenhouse with an area of ​​about 256m 2 . The rare earth soil with low heavy metal cadmium pollution was selected as the experimental area. The heavy metal Cd content in the experimental site was 0.04mg / kg, which was lower than the background value of soil environment in Ganzhou City, which was 0.09mg / kg. Without polluting the local soil, Pot experiments were used when exogenous Cd was added.

[0040] Soil properties: The basic physical and chemical indicators of tailings are: total phosphorus 100.0mg / kg, total nitrogen 170.0mg / kg, nitrate nitrogen 7.12mg / kg, ammonium nitrogen 18.4mg / kg, organic matter 2.61g / kg, pH value 4.38, Lanthanum 608.0 mg / kg, Yttrium 114.0 mg / kg and Europium 16.8 mg / kg. Put the sterilized tailings sand and soil into the experimental pot (a plastic p...

Embodiment 2

[0073] Before planting, sterilize the abandoned rare earth tailings test soil, sprinkle a certain amount of sterilant (hydrogen peroxide, the same as above), then record the original root length of ramie, use CdCl 2 Configure mother liquor, add in the flowerpot that fills 2kg rare-earth tailings sand by gradient 0,0.2,0.6,1mg / kg (operation method is identical with embodiment 1), do three parallels at each concentration, plant after balancing one week, After balance, the Cd content in the soil was about 7.72mg / kg. Ramie seedlings were planted in the same manner as in Example 1, and it took 6 months from planting ramie seedlings to ramie growth, and then taking samples back to the laboratory for relevant testing. During the planting period, it is watered every morning and evening, and the water is taken from the running water at the foot of the local mountain. After 6 months, the ramie growth condition was good, and the root system had a good soil-fixing effect, and the flower ...

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Abstract

The invention provides an ionic type rare earth abandoned mining area soil Cd pollution remediation method, and relates to the technical field of soil remediation. According to the ionic type rare earth abandoned mining area soil Cd pollution remediation method, the ionic type rare earth abandoned mining area soil is remedied through combination of abandoned rare earth tailing pioneer plants and indigenous fungi, and the ionic type rare earth abandoned mining area soil Cd pollution remediation method has the advantages that the plant remediation success rate is high, the effect is good, the technical process is simple and convenient, construction is easy, and the Cd content and the water and soil loss rate of the soil can be obviously reduced; and compared with similar methods, the ionic type rare earth abandoned mining area soil Cd pollution remediation method is low in cost, attractive, safe and easy to popularize and apply, and has huge application prospects and market requirements. According to the embodiment of the ionic type rare earth abandoned mining area soil Cd pollution remediation method, bacterial liquid of trichoderma and / or penicillium oxalicum is inoculated in the ionic rare earth abandoned mining area in the southern rainy region, the herbaceous or shrub plant seeds are dibbled, so that Cd in soil is obviously absorbed, the biomass of plants is improved, the ecological restoration effect of vegetation is good, and the ionic type rare earth abandoned mining area soil Cd pollution remediation method is suitable for rapid treatment of Cd pollution in rare earth tailing wasteland in the southern rainy region.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a soil remediation method in an ionic rare earth abandoned mine area. Background technique [0002] Ionic rare earths are national strategic resources, non-renewable, and are widely used in national defense construction and high-tech fields. Gannan, Jiangxi Province is rich in ionic rare earth resources, and is known as the "rare earth kingdom" in China. Ganzhou City, Jiangxi Province has 30% of the country's ionic rare earths, and is currently attracting attention at home and abroad. Mining of rare earths in southern Jiangxi began in the 1970s and 1980s, and roughly experienced three mining processes: pool leaching, heap leaching, and in-situ leaching. Rare earth mining has created a series of ecological and environmental problems such as vegetation and land resource destruction, water and soil pollution, etc. while creating high returns. Especially since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02B09C1/08
CPCA01B79/02B09C1/08Y02P10/20
Inventor 张萌王启沛冯兵姚娜师艳丽李铭书吴俊伟刘足根吴少林
Owner JIANGXI ACAD OF ECO-ENVIRONMENTAL SCI & PLANNING
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