Method for recovering vegetation of acidic waste storage yard of non-ferrous metal mine

A technology of acidic waste and non-ferrous metals, which is applied in the fields of machinery, application, agriculture, etc. to improve the soil, which can solve the health risks of residents and other problems, achieve the effect of convenient construction, no secondary pollution, and increase the content of organic matter

Active Publication Date: 2014-05-21
光大环境修复(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the natural environment, these fine particles often migrate under the action of wind, water, etc., which pose risks to the surrounding environment and the health of residents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Select an area of ​​1 mu in the waste storage pool of Daye Copper Mine in Hubei. After peeling off 10cm of waste on the surface, mix it with 400 kg of slag and 300 kg of quicklime, stir well and then backfill. After 3 weeks of maintenance, spread a layer of 6cm thick dredged sediment from the nearby reservoir, and spread a layer of 1cm thick quicklime. After 4 weeks of curing, sow a large number of seeds of Cyprinus haizhou obtained in situ. After three months, the survival rate of the seeds of the Haizhou fennel seed was 70.3%, and the vegetation recovery rate of the plot was 87.9%.

Embodiment 2

[0026] In the waste storage pool of Taolin lead-zinc mine in Hunan Province, an area of ​​1 mu was selected. After stripping 15cm of waste on the surface, it was mixed with 450 kg of slag and 330 kg of quicklime, and then backfilled after stirring evenly. After curing for 3 weeks, spread a layer of dewatered sludge from a nearby municipal sewage treatment plant with a thickness of 4 cm, and spread a layer of quicklime with a thickness of 1.5 cm. After 4 weeks of curing, seeds of vetiver harvested in situ were widely sown. After three months, the survival rate of vetiver seeds was 73.4%, and the vegetation recovery rate of the plot was 92.1%.

Embodiment 3

[0028] Select an area of ​​1 mu in the waste storage pool of Xiangtan Manganese Mine in Hunan Province. After peeling off 20cm of waste on the surface, mix it with 500 kg of slag and 350 kg of quicklime, and stir it evenly before backfilling. After curing for 3 weeks, spread a layer of dewatered sludge from a nearby municipal sewage treatment plant with a thickness of 6 cm, and spread a layer of quicklime with a thickness of 2 cm. After 4 weeks of curing, sow a large number of locally harvested pokeweed seeds. After three months, the survival rate of pokeweed seeds was 68.45%, and the vegetation recovery rate of the plot was 86.7%.

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PUM

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Abstract

The invention is aimed at the phenomena that an acidic waste storage yard of a non-ferrous metal mine is bare and barren due to the fact that pollutants are high in content and high in acidity. The following measures are taken to recover the vegetation of the area: (1) waste on the surface, calcium oxide and slag are mixed evenly and are maintained for 2-3 weeks; (2) a layer of sludge from a sewage processing factory or bottom mud generated in the dredging process of rivers, lakes and reservoirs is laid, then a layer of the calcium oxide is laid, and maintenance lasts for 4-5 weeks; (3) natural pioneer dominant plant species of the specific mine area are adopted, and then a natural recovery method is adopted to achieve the purpose of recovering the vegetation of the mine area. The method for recovering the vegetation of the acidic waste storage yard of the non-ferrous metal mine has the advantages of being easy and convenient to operate, low in cost and recyclable in waste.

Description

technical field [0001] The invention belongs to the field of ecological restoration in environmental restoration, and specifically relates to a method for restoring vegetation in mine waste dumping areas by using sludge or bottom mud, adding quicklime and slag, and using pioneer dominant plants in mining areas. Background technique [0002] Mining has been one of the important activities of social and economic development since ancient times. It not only provides a variety of valuable raw materials for economic construction, such as non-ferrous metals, minerals, etc., but also occupies an important position in my country's existing energy system. source of coal. However, mining also brings us a huge amount of solid and liquid waste, collectively referred to as "mine waste". These mine wastes have become the largest pollution stream today due to their large quantity and heavy pollution. They are often barren due to high levels of heavy metals and high acidity (especially in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B77/00
Inventor 胡波周芬李海建谢炳坤
Owner 光大环境修复(江苏)有限公司
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