Method for repairing heavy metal-contaminated soil

A technology for contaminated soil and heavy metals, applied in the field of contaminated soil remediation, can solve the problems of low space utilization, high cost, and low economic benefits, and achieve low maintenance costs, low cost, and strong operability

Inactive Publication Date: 2019-09-10
河南小威环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the traditional method of covering with sunshade nets can alleviate the problem of the southeast sedum safely in summer to a certain extent, in the process of large-scale engineering implementation and application, the cost is high, the space utilization rate is not high, and the economic benefits are not high

Method used

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  • Method for repairing heavy metal-contaminated soil

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Embodiment 1

[0024] figure 1 It is a flow chart of the method for repairing heavy metal-contaminated soil in Embodiment 1 of the present invention, such as figure 1 As shown, the method for repairing heavy metal-contaminated soil comprises the following steps:

[0025] Step 101, take the soil polluted by heavy metal cadmium and zinc, and perform leaching operation, the concentration of the eluent is 0.03 to 50 mmol per liter, the number of leaching is 3 to 5 times, and adding active strains.

[0026] Step 102, planting Sedum sedum, planting Sedum sedum by cuttings, planting 2 to 4 plants in a pit, planting the interactive plant corn, and removing the whole Sedum sedum plant from the soil after a growth cycle , the planting quantity of corn forms a shading effect on the southeast sedum, and carries out harmless treatment.

[0027] After the corn is mature, it can be used as a material for ethanol processing, and the stems and leaves are used as organic fertilizers.

[0028] During the g...

Embodiment 2

[0032] A method for remediating soil polluted by heavy metals. The polluted soil to be treated is selected as an experimental area, and Sedum sedum and corn are intercropped in the experimental area.

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Abstract

The invention discloses a method for repairing heavy metal-contaminated soil. The method comprises the steps: taking the soil which is contaminated by heavy metal cadmium and zinc, performing leachingoperation, planting Sedum alfredii Hance, performing harmless treatment, planting an interaction plant corn, removing the whole plant of Sedum alfredii Hance from the soil after a growth cycle, performing formation of a shading effect on the Sedum alfredii Hance through the number of the planted corn, detecting the concentration of heavy metal cadmium and zinc in the soil, and repeating the stepsother than leaching operation if the preset environmental safety standards are not met until the concentration of heavy metal cadmium and zinc in the soil reaches the preset standard requirements. According to the technical scheme, the technology of interaction between Sedum alfredii Hance and corn is adopted, the growth condition of Sedum alfredii Hance in summer is improved, so that normal growth of Sedum alfredii Hance is maintained in summer; and the method has the advantages of low cost, high operability, safety and the like when compared with traditional repair techniques.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a method for remediating soil polluted by heavy metals. Background technique [0002] Sites polluted by heavy metals will cause changes in the physical, chemical and biological properties of the soil, and cause irritation and physiological toxicity to the plants and animals that depend on them for survival. It has a certain selection and induction effect on the biomass and species. While changing the soil environment and ecosystem, the heavy metals accumulated in the soil will be enriched through the food chain and eventually cause harm to human health. It will also cause long-term direct exposure to polluted sites. Residents have a greater risk of pain, which seriously threatens the health of residents. Therefore, it is particularly necessary to study the remediation of heavy metal-contaminated soil in the research site. [0003] Cadmium and zinc are comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02B09C1/10
CPCB09C1/02B09C1/10B09C1/105B09C2101/00
Inventor 张庆涛郎学森陈太辉
Owner 河南小威环境科技有限公司
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