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Plant restoration method for tailings pond

A technology of phytoremediation and restoration methods, applied in the restoration of polluted soil, etc., can solve problems such as poor ecological stability, achieve the effects of reducing inhibition, improving growth ability, and wide application range

Pending Publication Date: 2019-05-31
广州草木蕃环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is limited to two kinds of plants, the ecological stability is poor, and it needs long-term post-maintenance and treatment. Therefore, using the micro-ecological plant configuration to establish a relatively stable micro-ecological restoration method is an important issue that needs to be considered

Method used

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  • Plant restoration method for tailings pond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Implementation object: An in-use tailings pond with a width of 10m and a length of 33m.

[0089] Repair method:

[0090] (1) Reserve 3m at the remote water end of the soil area of ​​the tailings pond in use as a buffer zone;

[0091] (2) Intercropping typhas, knotgrass, and centipedegrass in the soil area of ​​the tailings in use according to the ratio of 5:3:3, and spreading 8.8kg of moss within the planting area;

[0092] (3) The cattails were squared to the Mingshui area at a distance of 0.5m, and 0.8L of Eriocheir sinensis and Anabaena culture solution was spread in the planting area;

[0093] (4) Backfill the pit with tailings and harvested grass.

[0094] Half a year after the implementation of the case, the amount of stagnant sediment at the inlet of the front of the reservoir increased, and the amount of tailings recovered increased by three times. The concentration of each heavy metal also has different degrees of reduction, the specific data (unit: mg / kg) are as follows...

Embodiment 2

[0097] Implementation object: an abandoned tailings pond, covering an area of ​​2400m 2 , The tailings have been air-dried and there is no clear water.

[0098] Repair method:

[0099] (1) Level the soil area;

[0100] (2) Intercropping typha, knotgrass, and centipede grass in a soil area at a ratio of 5:3:3, and sowing 96kg of silver moss within the planting area;

[0101] (3) Harvest typhas, knotweed, and centipede grass, and make harmless treatments.

[0102] The comparison data of the case before and after six months of implementation are as follows:

[0103]

[0104] It can be seen from Examples 1 and 2 that the repair method of the present invention has a good absorption and transport effect on various heavy metal ions in the tailing pond.

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Abstract

The invention discloses a plant restoration method for a tailings ponds. The plant restoration method includes: 1), planting cattail, commelina and ciliate desert-grass to the tailings ponds by adopting an interplanting manner; 2), sowing moss in areas without clear water within the planting area; 3), planting duckweed in planting area with clear water; 4), harvesting cattail, commelina and ciliate desert-grass with harmless treatment. With the method, the content of heavy metal in the tailings ponds can be effectively reduced, the service life of the tailings ponds is prolonged, and the vegetation coverage of retired tailings ponds can be improved.

Description

Technical field [0001] The invention relates to the field of soil pollution treatment and restoration, in particular to a phytoremediation method for a tailing pond. Background technique [0002] The tailings are the "waste residue" after the valuable concentrate is selected by the beneficiation plant. It is a mixture of slag and water with extremely high water content. The tailings sand contains acid, lead, zinc, arsenic, nickel, cadmium, mercury and other heavy metals, as well as uranium and other radioactive materials. The discharge of tailings wastewater will pollute the downstream water body and the soil in the irrigation area. At present, environmental protection measures for tailings ponds are mainly dynamic monitoring of in-use ponds, environmental supervision of decommissioned ponds and comprehensive utilization of tailings removal. However, these methods are relatively passive and fail to effectively reduce the pollution of tailings. The sand removal process may cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
Inventor 历军赵伟强丁晓龙俞龙生徐华丽
Owner 广州草木蕃环境科技有限公司
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