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In-situ ecological restoration method of composite polluted soil using biological and carbonized materials

A technology of ecological restoration and compound pollution, which is applied in the field of landscaping and environmental pollution restoration, can solve the problems of long-term, low efficiency of compound polluted soil, and poor effect of compound soil pollution restoration, so as to quickly restore vegetation and improve the urban ecological environment Effect

Active Publication Date: 2021-04-09
SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the efficiency of single phytoremediation for compound polluted soil is relatively low, and it takes a long time to achieve the purpose of remediation, and the remediation effect for compound soil pollution is poor

Method used

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  • In-situ ecological restoration method of composite polluted soil using biological and carbonized materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The in-situ ecological restoration method for controlling compound polluted soil comprises the following steps:

[0026] (1) Add biochar and inorganic improvement materials to the contaminated soil to be repaired, and mix and stir evenly; the biochar is a mixture of rapeseed and corn crop stalks calcined at 500 ° C to obtain particles with a particle size of less than 5 μm. The inorganic modified material described above is CoMoS 4 、Cu 2 MoS 4 With a mixture of mass ratio of 1:1, the mass ratio of biochar and inorganic improvement material is 1:0.3; the amount of biochar and inorganic improvement material is 0.5kg / square.

[0027] (2) The polluted soil layer is covered with a layer of greening planting soil, the polluted soil layer needs to be compacted and vibrated, and the layer height is 40cm; the polluted soil layer is drained by inserting water pipes every 80cm horizontally.

[0028] (3) Configure landscape plant communities according to landscape requirements, ...

Embodiment 2

[0031] The in-situ ecological restoration method for controlling compound polluted soil comprises the following steps:

[0032] (1) Add biochar and inorganic improvement materials to the contaminated soil to be repaired, mix and stir evenly; the biochar is the particle size less than 3.5μm obtained after drying the sludge in the lotus root pond and calcining at 580°C , the inorganic modification material is NiMoS 4 、Cu 2 MoS 4 With a mixture of mass ratio 1:0.8, the mass ratio of biochar and inorganic improvement material is 1:0.6; the amount of biochar and inorganic improvement material is 0.35kg / square, and the mixed bacteria of Pseudomonas and Bacillus subtilis are added at the same time agent, the added amount of mixed bacteria agent is 0.15% of the total mass of biochar and inorganic improvement materials, and the concentration of Pseudomonas is 5×10 4 cfu / ml, the concentration of Bacillus subtilis is 5×10 4 cfu / ml.

[0033] (2) The polluted soil layer is covered wit...

Embodiment 3

[0037] The in-situ ecological restoration method for controlling compound polluted soil comprises the following steps:

[0038] (1) Add biochar and inorganic improvement materials to the contaminated soil to be repaired, mix and stir evenly; the biochar is the particles with a particle size of less than 3.5 μm after drying the sludge in fish ponds and calcining at 580°C , the inorganic modification material is Cu 2 MoS 4 , Zn 2 MoS 4With a mixture of mass ratio 1:0.5, the mass ratio of biochar and inorganic improvement material is 1:0.8; the amount of biochar and inorganic improvement material is 0.65kg / square, and AM mycorrhizal fungus is added at the same time, and the addition of AM mycorrhizal fungus The amount is 50g / square.

[0039] (2) The polluted soil layer is covered with a layer of greening planting soil, the polluted soil layer needs to be compacted and vibrated, and the layer height is 50cm; the polluted soil layer is drained by inserting water pipes every 70c...

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Abstract

The invention provides an in-situ ecological restoration method for treating composite polluted soil. Biochar and inorganic improvement materials are added to the polluted soil to be restored, mixed and stirred evenly; the polluted soil layer is covered with a layer of greening planting soil; according to the landscape It is necessary to configure the landscape plant community, and simulate artificial rainfall every 25-35 days, which is subject to soaking the polluted soil layer to be repaired. The biochar is a product obtained by calcining one or more of crop straw, litter, and river bottom silt at 500-600°C. The inorganic improvement material includes CoMoS 4 , NiMoS 4 , Cu 2 MoS 4 , Zn 2 MoS 4 any one or more of them. After adopting the technical solution method of the present invention for two years, the removal rate of Cu is 15-25%, the removal rate of Zn is 20-28%, the removal rate of Pb is 10-22%, and the removal rate of Cd is 8-17% .

Description

technical field [0001] The invention belongs to the field of landscaping and environmental pollution restoration, and relates to an in-situ restoration method for composite pollution, specifically a method for carrying out in-situ plant restoration and landscape reconstruction of soil heavy metal pollution by using plants, microorganisms and carbonized porous recycling materials . Background technique [0002] Phytoremediation refers to the process in which plants and soil microorganisms work together to transform pollutants into harmless or usable forms. At the same time, the effect of site landscape reconstruction can be achieved through the application and preparation of different types of plants. At present, the efficiency of single phytoremediation for complex polluted soil is relatively low, and it takes a long time to achieve the purpose of remediation, and the remediation effect for complex soil pollution is poor. Contents of the invention [0003] The present inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/105B09C2101/00
Inventor 张浪郑思俊梁晶李跃忠张冬梅韩继刚富婷婷杨博
Owner SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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