Treatment method for heavy metal contaminated soil through ecological restoration

A technology of polluted soil and ecological restoration, applied in the field of soil pollution control, can solve the problems of slow effect, application limitation, unstable restoration effect, etc., and achieve the effect of inhibiting pathogens and improving plant nutrition

Inactive Publication Date: 2019-11-08
江西青赣环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid the risk of exposure to the human body, in recent years, more and more attention has been paid to the research on non-edible economic crops for phyt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for ecological restoration of heavy metal polluted soil, comprising the following steps:

[0030] a. Use a cultivator to stir the soil layer polluted by heavy metals to a depth of 18cm;

[0031] b. Irrigate the soil to be treated in step a, make it in a flooded state, and keep it in the sun for 3 days until loose;

[0032] c. mixing the soil with the thick 15cm of the surface layer of the soil to be treated with composite microbial strains, said composite microbial strains comprise Bacillus megaterium, colloid bacillus, and the weight ratio of said composite microbial strains is Bacillus megaterium: Gliobacillus = 1:1;

[0033] d. Plant repairing plants in the soil to be treated, the repairing plants are Viola baoshanensis and Celestia cerulea, the repairing plants are mixed and planted, allowed to grow naturally, and the whole plant is removed after 10-12 months;

[0034] e. Repeat step a-step d 3-4 times in a loop.

[0035] The method for planting and repa...

Embodiment 2

[0043] A method for ecological restoration of heavy metal polluted soil, comprising the following steps:

[0044] a. Use a tiller to stir the soil layer polluted by heavy metals to a depth of 18cm-30cm;

[0045] b. The soil to be treated in the irrigation step a makes it in a flooded state, and after 3-5 days, air it to loosen;

[0046] c. mix the soil with the thick 18cm of the surface layer of the soil to be treated evenly with the compound microbial strains, the compound microbial strains include Serratia marcescens, Pseudomonas aeruginosa and Streptomyces clumps, the compound microorganisms The weight ratio of the strains is Serratia marcescens: Pseudomonas aeruginosa and Streptomyces convolvulus=1:1:0.5;

[0047] d. Plant restoration plants in the soil to be treated, the restoration plants are pokeweed and ghost needles, the restoration plants are mixed and allowed to grow naturally, and the plants are removed as a whole after 10-12 months;

[0048] e. Repeat step a-ste...

Embodiment 3

[0057] A method for ecological restoration of heavy metal polluted soil, characterized in that it comprises the following steps:

[0058] a. Use a cultivator to stir the soil layer polluted by heavy metals to a depth of 20cm;

[0059] b. The soil to be treated in the irrigation step a makes it in a flooded state, and after 3-5 days, air it to loosen;

[0060] c. Mix the soil with a thickness of 15-18cm in the surface layer of the soil to be controlled evenly with the compound microbial strains, the compound microbial strains include Bacillus megaterium, Pseudomonas aeruginosa and Streptomyces convolvulus, the complex microbial strains The weight ratio of Bacillus megaterium:Pseudomonas aeruginosa and Streptomyces convolvulus=1:1:0.5;

[0061] d. Plant repairing plants in the soil to be treated, the repairing plants are Viola baoshanensis and Ghost needle grass, the repairing plants are mixed and planted, allowed to grow naturally, and the whole plant is removed after 10-12 mo...

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PUM

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Abstract

The invention discloses a treatment method for heavy metal contaminated soil through ecological restoration. The treatment method comprises the following steps: a, overturning a heavy metal contaminated soil layer by a depth of 18-30 cm in virtue of a tiller; b, irrigating to-be-treated soil in step a to allow the soil to be in a flooded state, maintaining the soil in the state for 3-5 days and carrying out airing until the soil is loose; c, mixing at least one selected from the group consisting of Bacillus megaterium, Bacillus mucilaginosus, Serratia marcescens, Pseudomonas aeruginosa and Streptomyces pactum with the part of soil located at the surface of the to-be-treated soil and having a thickness of 15-18 cm; d, planting at least one selected from the group consisting of Baoshan violet, Thlaspi caerulescens, Phytolacca acinosa and Bidens pilosa in the soil to be treated, allowing the planted plant to grow naturally, and removing the whole plant after 10-12 months; and e, cyclically repeating the steps a-d 3 to 4 times. The treatment method of the invention adopts microorganisms and plants for joint restoration of contaminated soil, realizes thorough treatment, can treat both soil and water without recurrence, and fundamentally improve the heavy metal pollution of the soil.

Description

technical field [0001] The invention belongs to the technical field of soil pollution control, and in particular relates to a method for ecological restoration of heavy metal polluted soil. Background technique [0002] Soil is not only an important part of the earth's ecological circle, but also one of the important natural resources that human beings rely on for survival. With the development of industrial activities such as mineral mining and smelting, and agricultural activities such as sewage irrigation, application of sludge and low-quality chemical fertilizers, harmful heavy metals such as Cd and Pb continue to enter the soil environment, causing pollution to normal production and life. Therefore, the control of soil heavy metal pollution is of great significance to the construction of ecological civilization and the healthy life of human beings. [0003] The traditional remediation methods for soil heavy metal pollution are usually physical and chemical methods, suc...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 邹小清熊国华
Owner 江西青赣环境科技有限公司
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