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Method for restoring vegetation system the soil of which is in combined pollution of vestalium, zinc, plumbi and cuprum

A technology of compound pollution and remediation methods, applied in the field of contaminated soil treatment, can solve problems such as toxicity, and it is difficult for ordinary plants to achieve rapid removal, and achieve the effect of small engineering amount, no damage to soil physical and chemical properties, and low investment.

Inactive Publication Date: 2008-02-06
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The cadmium content in ordinary plants generally does not exceed 1mg kg -1 , the lead content generally does not exceed 5mgkg -1 , the normal content of copper is 5-20mg / kg, excessive heavy metals are very toxic to common plants, and it is difficult to quickly remove cadmium, zinc, lead and copper from polluted soil by planting common plants The purpose of zinc, lead and copper complex pollutants

Method used

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  • Method for restoring vegetation system the soil of which is in combined pollution of vestalium, zinc, plumbi and cuprum
  • Method for restoring vegetation system the soil of which is in combined pollution of vestalium, zinc, plumbi and cuprum
  • Method for restoring vegetation system the soil of which is in combined pollution of vestalium, zinc, plumbi and cuprum

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Embodiment 1

[0023] Intercropping sedum sedum and A. haizhou in compound polluted soil containing zinc 2001mg / kg, cadmium 21.15mg / kg, lead 1503mg / kg, copper 1435mg / kg, applying nitrogen, phosphorus and potassium fertilizers, and managing according to traditional crop management methods during the growth period. The aboveground part of Sedum sedum is harvested 4 months after the first transplant, the seedlings are replenished after harvest, and the second harvest is carried out 3 months later, and the sedum haizhou is harvested after 10 months of growth. It has been determined that after the first harvest, the dry matter yield of Sedum sedum is 600kg / hm 2 , the content of cadmium in the aboveground part is 207mg / kg, the content of zinc is 10587mg / kg, and the content of lead is 117mg / kg, and the cadmium, zinc and lead taken away from the soil are 0.12kg / hm 2 、6.35kg / hm 2 and 0.07kg / hm 2 (See Figure 1), after the second harvest, the dry matter yield of Sedum sedum is 2141kg / hm 2 , the cont...

Embodiment 2

[0025] Intercropping Sedum sedum Sedum Sedum and A. haizhou in complex polluted soil containing 2001mg / kg cadmium, 21.15mg / kg cadmium, 1503mg / kg lead, and 1435mg / kg copper, apply nitrogen, phosphorus, potassium and organic fertilizers, and follow traditional crop management methods during the growth period to manage. The aboveground part of Sedum sedum is harvested 4 months after the first transplant, the seedlings are replenished after harvest, and the second harvest is carried out 3 months later, and the sedum haizhou is harvested after 10 months of growth. It has been determined that after the first harvest, the dry matter yield of Sedum sedum is 1278kg / ha, the content of cadmium in the aboveground part is 193.5mg / kg, the content of zinc is 10000mg / kg, and the content of lead is 177mg / kg. Cadmium, zinc and lead are 0.24kg / hm respectively 2 、12.78kg / hm 2 and 0.23kg / hm 2 (See Fig. 2), after the second harvest, the dry matter yield of Sedum sedum is 3219kg / ha, and the cadmi...

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Abstract

The invention relates to a plant system repairing method for composite polluted soil of chromium, zinc, lead and copper. According to the invention, Sedum alfredii H and Elsholtzia harchowensis are intercropped in the composite polluted soil of chromium, zinc, lead and copper, the root system of the Sedum alfredii H absorbs chromium, zinc and lead, the Elsholtzia harchowensis absorbs copper, and the Sedum alfredii H and the Elsholtzia harchowensis transport the pollutions to the overground part, the overground part is harvested and removed regularly or according to the growth height of the Sedum alfredii H and the Elsholtzia harchowensis, thereby removing a plurality of chromium, zinc, lead and copper from the soil, the biological normal position repair for the composite polluted soil of chromium, zinc, lead and copper can be implemented. The method is economic and convenient, and has no secondary pollution, and the invention can conserve both moisture and soil, and can beautify the environment.

Description

technical field [0001] The invention relates to a phytosystemic restoration method for cadmium-zinc-lead-copper compound polluted soil, and belongs to the technical field of polluted soil treatment. Background technique [0002] The soil area polluted by heavy metals in my country has reached 20 million hectares, accounting for 1 / 5 of the total cultivated land area. According to the latest survey results, heavy metal pollution in my country's soil is becoming more and more serious, and compound pollution is the main type. The survey of heavy metal pollution in the soil of several industrial, mining and sewage irrigation areas in Beijing, Guangdong, and Liaoning shows that the heavy metal content in the soil in industrial and mining areas and sewage irrigation areas generally exceeds the standard, and the soil zinc content of long-term sludge application can reach 370-470 mg / kg. The cadmium content in farmland soil is as high as 130mg / kg. The lead dust and lead smoke in the...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 杨肖娥李廷强
Owner ZHEJIANG UNIV
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