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Method for repairing contaminated soil by intercropping heavy metal hyperaccumulation herbaceous plants and woody flowers

A technology for polluted soil and heavy metals, applied in the restoration of polluted soil and other directions, can solve the problems of few phytoremediation technologies, the phytoremediation technology is in the research stage, and the plants are long, so as to achieve rapid removal of heavy metal pollution, prevention of soil erosion and natural growth. fast reproduction effect

Inactive Publication Date: 2019-12-17
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, since the selection of plants in the phytoremediation technology of polluted soil is a relatively long process, it is like looking for a needle in a haystack to screen the plants with super accumulation characteristics of heavy metals among a large number of plants. Most of the phytoremediation technologies for polluted soil are still in the research stage and are considered Few phytoremediation technologies widely accepted by society

Method used

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  • Method for repairing contaminated soil by intercropping heavy metal hyperaccumulation herbaceous plants and woody flowers
  • Method for repairing contaminated soil by intercropping heavy metal hyperaccumulation herbaceous plants and woody flowers
  • Method for repairing contaminated soil by intercropping heavy metal hyperaccumulation herbaceous plants and woody flowers

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Effect test

Embodiment 1

[0037] This embodiment selects farmland near a certain lead-zinc mining area, and provides a method for intercropping polluted soil with heavy metal hyperaccumulating herbs and woody flowers, including the following steps:

[0038] (1) The single factor index method is used to investigate the soil heavy metal pollution: the heavy metal pollutants in the soil are determined to be lead, cadmium, arsenic, zinc, and copper, and the median and average values ​​of soil pH are greater than 7.5. The test results of heavy metals such as cadmium, arsenic, lead, copper, zinc, etc. are all 1-15 times higher than the "Soil Environmental Quality Standard Agricultural Land Soil Pollution Risk Control Standard" (GB15618-2018);

[0039] (2) After the seeds of the Jade lotus tree are raised in the greenhouse seedlings, the Jade lotus seedlings are cut on the polluted soil in September-October, and the area of ​​2m×2m is used as a planting hole, and one plant of Jade lotus is cut in each planting...

Embodiment 2

[0048] This embodiment selects farmland near a certain lead-zinc mining area, and provides a method for intercropping polluted soil with heavy metal hyperaccumulating herbs and woody flowers, including the following steps:

[0049] (1) The single factor index method is used to investigate the soil heavy metal pollution: the heavy metal pollutants in the soil are determined to be lead, cadmium, arsenic, zinc, and copper, the median and average value of the soil pH value are 5.0, and the cadmium in the polluted soil is 5.0. The detection results of heavy metals such as arsenic, lead, copper, zinc, etc. are all 1-10 times higher than the "Soil Environmental Quality Standard Agricultural Land Soil Pollution Risk Control Standard" (GB15618-2018);

[0050] (2) After the seeds of the black locust tree are grown in the greenhouse seedlings, cuttage black locust seedlings in September-October on the polluted soil, and take the area of ​​2m * 2m as a planting hole, and each planting hole...

Embodiment 3

[0060] This embodiment selects a farmland near a certain copper mining area, and provides a method for intercropping polluted soil with heavy metal super-enriched herbs and woody flowers, including the following steps:

[0061] (1) The single factor index method is used to investigate the soil heavy metal pollution: it is determined that the heavy metal pollutants in the soil are lead, cadmium, arsenic, zinc, and copper, the median and average value of the soil pH value are 8.0, and the cadmium in the polluted soil is 8.0. The test results of heavy metals such as arsenic, lead, copper, zinc, etc. are all 1-5 times higher than the "Soil Environmental Quality Standard Agricultural Land Soil Pollution Risk Control Standard" (GB15618-2018);

[0062] (2) After the seeds of the sausage tree are seeded in the greenhouse, cut the sausage tree seedlings on the polluted soil in September-October, and use the area of ​​2m × 2m as a planting hole, and cut a sausage tree in each planting ho...

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Abstract

The invention provides a method for repairing contaminated soil by intercropping heavy metal hyperaccumulation herbaceous plants and woody flowers. The method comprises the following steps: (1) investigating the heavy metal contamination condition of soil; (2) transplanting woody flowers on the contaminated soil; (3) planting herbaceous plants capable of hyperaccumulation of heavy metals on the contaminated soil; (4) when the plant height of the perennial herbaceous plants is 40-50 cm, harvesting the perennial herbaceous plants, with stubbles of 3-5 cm being reserved; (5) recycling the perennial herbaceous plants harvested in the step (4), wherein flower parts harvested from the woody flowers can be eaten; and (6) carrying out heavy metal content detection on the contaminated soil, and repeating the step (4) and the step (5) until the soil environment quality reaches the standard. The method is reasonable in design, simple to operate, low in remediation cost, free of secondary pollution, capable of achieving remediation while production, wide in application prospects in soil polluted by various heavy metals, high in economic benefits and capable of generating good environmental benefits.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal-contaminated soil, in particular to a method for remediating polluted soil by using intercropping of heavy metal super-enriched herbs and woody flowers. Background technique [0002] The development of mineral resources has greatly promoted the rapid development of the national economy, but it has also brought serious environmental problems. During the mining process, wastewater discharge, waste rock and tailings stacking and leaching cause the mining area and surrounding soil to accumulate a large amount of heavy metals that are harmful to human body. Because heavy metals are not easily decomposed, transformed or enriched in the soil, and have strong stability, it is difficult to remove them from the soil, making the treatment of heavy metal pollution in soil very difficult. [0003] Soil heavy metal pollution accounts for a large part of the current polluted soil. Soil heavy ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 杨崎峰朱红祥覃晖周永信宋海农谢湉廖长君黄锦孙张德明贾雪婷杨燕媛廖谨宣黄初万颖
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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