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Method for repairing heavy metal pollution in mine soil and sludge

A heavy metal and soil technology, applied in the field of bioremediation of heavy metal pollution, can solve problems such as limited plant varieties, and achieve the effect of strong diffusion ability and rapid growth

Inactive Publication Date: 2008-12-31
SICHUAN AGRI UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nevertheless, the plant varieties suitable for bioremediation of soil heavy metal pollution are still extremely limited, and further research and expansion of available resources are needed
But as we all know, due to the richness of plant resources on the earth, it is not an easy task to determine which plants have certain corresponding characteristics. plant species needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Present embodiment is the method for repairing the heavy metal pollution of mine soil, and its concrete practice is:

[0018] Using the direct transplanting method, under natural conditions, the wild Chrysanthemum chrysanthemum was planted in the heavy metal-polluted soil of the Fuquan lead-zinc mine in Hanyuan County, Sichuan Province;

[0019] After 3 months, carry out stubble and harvest the aerial part of the plant, and measure wherein the weight percentages of four heavy metals of Cd, Cu, Pb, and Zn are respectively: 112.2mg kg -1 , 204.0mg kg -1 、375.9mg kg -1 、2122.1mg kg -1 .

Embodiment 2

[0021] The method for remediating the heavy metal pollution of sludge in this embodiment, its concrete practice is:

[0022] Using the method of direct seeding under natural conditions, the wild Chrysanthemum chrysanthemum was planted in the heavy metal-polluted sludge of the non-ferrous metal smelter in Hanyuan County, Sichuan Province;

[0023] After 85 days, carry out stubble and harvest the aerial part of the plant, and measure wherein the weight percentages of four heavy metals of Cd, Cu, Pb, and Zn are respectively: 153.9mg kg -1 、246.3mg kg -1 、341.7mg kg -1 、1978.5mg kg -1 .

[0024] It can be seen from the above examples 1 and 2 that the present invention can obviously absorb heavy metals such as Cd, Cu, Pb, Zn in the polluted soil by planting Chrysanthemum chrysanthemum in heavy metal-polluted mine soil or sludge, thereby achieving effective restoration of mine soil and sludge heavy metal pollution.

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Abstract

The invention discloses a method for repairing heavy metal pollution in mine soil and sludge. The method is characterized in that wild garden chrysanthemum is planted in the mine soil and sludge polluted by the heavy metal, the heavy metals accumulated in soil such as Cd, Cu, Pb, Zn, and the like, are absorbed by adopting the cumulation property of the wild garden chrysanthemum to four heavy metals such as Cd, Cu, Pb and Zn, then most of the four metals are transferred to the overground part, thus achieving the purpose of repairing heavy metal pollution in mine soil.

Description

technical field [0001] The invention relates to a bioremediation method for heavy metal pollution, in particular to a method for remediating single or compound pollution of heavy metals such as Cd, Cu, Pb and Zn in mine soil and sludge. Background technique [0002] Heavy metal (such as Cd, Cu, Pb, Zn, etc.) pollution is concealed, long-term, and irreversible. The pollutants have poor mobility in the medium, long residence time, cannot be degraded by microorganisms, and will eventually affect human health through food chain transmission and other channels. . [0003] At present, the methods of remediating heavy metal pollution mainly include engineering remediation, physical and chemical remediation, bioremediation (phytoremediation and microbial remediation) technology, and agricultural ecological restoration. These methods have certain characteristics and can reduce the pollution of heavy metals to a certain extent. However, the use of engineering, physical and chemical ...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 张世熔张少卿邓欧平
Owner SICHUAN AGRI UNIV
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