CN113385530A - Remediation method of heavy metal contaminated soil - Google Patents
Remediation method of heavy metal contaminated soil Download PDFInfo
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- CN113385530A CN113385530A CN202110782584.2A CN202110782584A CN113385530A CN 113385530 A CN113385530 A CN 113385530A CN 202110782584 A CN202110782584 A CN 202110782584A CN 113385530 A CN113385530 A CN 113385530A
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- soil
- heavy metal
- contaminated
- pollution
- remediation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
Abstract
The invention discloses a method for restoring heavy metal contaminated soil, which is convenient for targeted treatment according to the characteristics of the contaminated soil by marking the contaminated soil with different pollution degrees. Carrying out biochemical solvent spraying treatment on surface soil with serious pollution, replacing the treated surface soil with bottom soil, filling a microbial community in the surface soil to achieve the aim of carrying out layer-by-layer remediation treatment on the soil, sowing green grass to be used as a fertilizer in combination with planting sunflower which has effective soil remediation to further remediate the soil; secondly, the plastic film effect of laying in the soil pit before utilizing the replacement can prevent that the pollutant in bottom soil and the top soil from permeating to deeper soil horizon, can carry out the pertinence layering to the soil that receives the pollution through this mode and handle, effectively improves remediation efficiency, and the processing method is simple, and is with low costs facilitate promotion.
Description
Technical Field
The invention belongs to the technical field of soil remediation, and particularly relates to a remediation method of heavy metal contaminated soil.
Background
With the development of the times, although society and science and technology are greatly developed, the environment is polluted to a certain extent, the sustainable development is not facilitated, heavy metals are prominent in inorganic pollutants of soil, and the heavy metals are easy to accumulate because the heavy metals cannot be decomposed by soil microorganisms. The conversion into more toxic methyl compounds, even some methyl compounds accumulate in human body through food chain in harmful concentration, seriously endanger human health, and the soil remediation is a technical measure for restoring normal functions of polluted soil.
When the existing soil remediation method is used for remedying soil, a single soil remediation method is usually used for reducing the cost, and in some soils with different pollution degrees and pollution depths, the single remediation method is not beneficial to rapid remediation and causes the remediation efficiency to be deficient, and is also not beneficial to remediation aiming at the soil, so that the cost is increased, and meanwhile, the remediation method for the soil polluted by heavy metal is provided for solving the problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the method for repairing the heavy metal contaminated soil, and solves the problems that the existing method for repairing the soil is single, is not beneficial to quickly repairing the soil, has poor repairing efficiency and is easy to cause the increase of the cost.
In order to solve the technical problems, the invention provides the following technical scheme: the method for restoring the heavy metal contaminated soil comprises the following steps:
and S1, marking the depth of the soil pollution of the soil area polluted by the heavy metals according to the result of the soil survey in the early stage and combining the field detection data, scooping the marked surface soil by using a machine according to the marked depth, and collecting the soil in a screening machine.
And S2, after the soil is collected by the screening device, screening the soil, and removing and collecting metal objects, other garbage impurities such as plastics and the like in the soil.
S3, after plastic and metal impurities in the soil are cleaned, crushing the soil blocks by using a crushing device for 2-3 times, collecting the soil containing heavy metals, accommodating the soil into a stirring vehicle, spraying a biochemical solvent capable of promoting dissolution or migration of pollutants in the soil environment in the process of stirring the soil, fully mixing the biochemical solvent with the polluted soil under the stirring action, and then discharging the solvent containing the pollutants from the soil.
S4, after primarily treating the seriously polluted surface soil, solarizing and drying the soil with the discharged pollutant solvent, shoveling the bottom soil by using a machine, and paving a plastic film in the soil pit before backfilling the soil pit.
And S5, adding a microbial community artificially constructed or naturally domesticated into the polluted soil layer, replacing the primarily treated surface soil with the primarily treated bottom soil after the addition is finished, covering the bottom soil on the surface soil, and filling and returning the soil to the pit.
S6, sowing grass seeds on the replaced soil, harvesting and burning the grass seeds after the grass seeds grow for one period, paving and mixing the grass seeds into the soil to be used as fertilizer, then planting sunflowers on the soil, and adding earthworm groups into the soil.
In a preferred embodiment of the present invention, in step S1, the collected surface soil is scooped up to a depth marked by a depth of the soil, the soil on the bottom layer is soil with a high degree of contamination, and the soil on the surface layer is soil with a low degree of penetration contamination.
In a preferred embodiment of the present invention, in step S3, the solvent containing the pollutants is discharged to the environment after sewage treatment.
In a preferred embodiment of the present invention, in step S5, the microorganism for repair includes one or more of pseudomonas aeruginosa, rhodotorula glutinis, acetobacter azotobacter, candida rugosa, and acidophilus stealth.
In a preferred embodiment of the present invention, in step S6, the harvested fertilizer can be added with manure, and the planted sunflowers are removed after harvesting and burned separately, wherein the cycle is repeated 2-3 times.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. according to the method, the contaminated soil is marked with different pollution degrees, so that targeted treatment can be conveniently carried out according to the characteristics of the contaminated soil, the surface soil with serious pollution is subjected to biochemical solvent spraying treatment, and is replaced with the bottom soil after treatment, a microbial community is added into the surface soil, so that the soil can be repaired layer by layer, and the soil can be further repaired by sowing green grass as a fertilizer and being matched with planting to play a role in repairing the soil effectively.
2. According to the invention, when the surface soil and the bottom soil are replaced, the degradable plastic film is laid in the soil pit before replacement, so that pollutants in the bottom soil and the surface soil can be prevented from permeating into a deeper soil layer.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
Technical means for implementing the present invention; authoring features; the purpose served by the disclosure is to provide a thorough understanding of the invention, and is to be construed as being a limitation on the scope of the invention as defined by the appended claims. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, materials used in the following examples; reagents and the like are commercially available unless otherwise specified.
Examples
The repairing method of the heavy metal contaminated soil as shown in the figure comprises the following steps:
and S1, marking the depth of the soil pollution of the soil area polluted by the heavy metals according to the result of the soil survey in the early stage and combining the field detection data, scooping the marked surface soil by using a machine according to the marked depth, and collecting the soil in a screening machine.
And S2, after the soil is collected by the screening device, screening the soil, and removing and collecting metal objects, other garbage impurities such as plastics and the like in the soil.
S3, after plastic and metal impurities in the soil are cleaned, crushing the soil blocks by using a crushing device for 2-3 times, collecting the soil containing heavy metals, accommodating the soil into a stirring vehicle, spraying a biochemical solvent capable of promoting dissolution or migration of pollutants in the soil environment in the process of stirring the soil, fully mixing the biochemical solvent with the polluted soil under the stirring action, and then discharging the solvent containing the pollutants from the soil.
S4, after primarily treating the seriously polluted surface soil, solarizing and drying the soil with the discharged pollutant solvent, shoveling the bottom soil by using a machine, and paving a plastic film in the soil pit before backfilling the soil pit.
And S5, adding a microbial community artificially constructed or naturally domesticated into the polluted soil layer, replacing the primarily treated surface soil with the primarily treated bottom soil after the addition is finished, covering the bottom soil on the surface soil, and filling and returning the soil to the pit.
S6, sowing grass seeds on the replaced soil, harvesting and burning the grass seeds after the grass seeds grow for one period, paving and mixing the grass seeds into the soil to be used as fertilizer, then planting sunflowers on the soil, and adding earthworm groups into the soil.
In other embodiments, in step S1, the collected surface soil is shoveled to be soil with high pollution degree, the bottom soil is soil with low penetration pollution degree, and the shoveled surface soil depth is the marked depth;
through this design, can carry out the sign with soil according to the pollution degree with the pollution degree, be convenient for make the processing of pertinence with soil, be convenient for carry out high-efficient restoration with soil, improve its remediation efficiency.
In other embodiments, in step S3, the solvent containing the contaminant is discharged from the soil to the environment after sewage treatment;
through this design, prevent that it from when handling contaminated soil, the produced sewage of its processing procedure causes secondary pollution to the environment on every side, is convenient for ensure the normal restoration of soil.
In other embodiments, in step S5, the repairing microorganism includes one or more of pseudomonas aeruginosa, rhodotorula glutinis, acetobacter azotobacter, candida rugosa, and acidophilus stealth;
through this design, can directly place the microbiota in the replacement soil layer after the replacement soil layer, can carry out continuous restoration to surface course soil and bottom soil.
In other embodiments, the harvested vegetation fertilizer may be added with manure and the planted sunflowers removed for separate incineration after harvesting in step S6, repeating for 2-3 times.
Through this design for the plant ash of collection can mix with organic matter, straw, wheat straw, shredded wood piece and bark etc. excrement and urine etc. relies on the microbial action of compost in-process to degrade the organic pollutant of difficult degradation in the soil, plays diversified effect prosthetic to soil.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature is "above" the second feature; "above" and "above" include the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature is "below" the second feature; "below" and "beneath" include the first feature being directly beneath and obliquely below the second feature, or merely indicating that the first feature is at a lesser level than the second feature.
The foregoing shows and describes the general principles of the present invention; the main features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The method for restoring the heavy metal contaminated soil is characterized by comprising the following steps: the method comprises the following steps:
s1, marking the depth of the soil pollution of the soil area polluted by the heavy metals according to the result of the soil survey in the early stage and combining field and field detection data, scooping up the marked surface soil by a machine according to the marked depth, and collecting the soil into a screening machine;
s2, after the soil is collected by the screening device, the soil is screened, and metal objects, other plastic and other garbage sundries in the soil are removed and collected;
s3, after plastic and metal impurities in soil are cleaned, crushing the soil blocks by using a crushing device for 2-3 times, accommodating the collected soil containing heavy metals into a stirring vehicle, spraying a biochemical solvent capable of promoting dissolution or migration of pollutants in the soil environment in the process of stirring the soil, fully mixing the biochemical solvent with the polluted soil under the stirring action, and then discharging the solvent containing the pollutants from the soil;
s4, primarily treating surface soil with serious pollution, solarizing and drying the soil with discharged pollutant solvent, shoveling the bottom soil by using a machine, and paving a plastic film in the soil pit before backfilling the soil pit;
s5, adding a microbial community artificially constructed or naturally domesticated into the polluted soil layer, replacing the primarily treated surface soil with the primarily treated bottom soil after the addition is finished, covering the bottom soil on the surface soil, and filling and returning the soil to the pit;
s6, sowing grass seeds on the replaced soil, harvesting and burning the grass seeds after the grass seeds grow for one period, paving and mixing the grass seeds into the soil to be used as fertilizer, then planting sunflowers on the soil, and adding earthworm groups into the soil.
2. The method for remediating heavy metal-contaminated soil as recited in claim 1, wherein: in step S1, the collected surface soil is shoveled to be soil with high pollution degree, the bottom soil is soil with low osmotic pollution degree, and the shoveled surface soil depth is the marked depth.
3. The method for remediating heavy metal-contaminated soil as recited in claim 1, wherein: in step S3, the solvent containing the pollutants is discharged from the soil to the environment after sewage treatment.
4. The method for remediating heavy metal-contaminated soil as recited in claim 1, wherein: in the step S5, the microorganism for repair includes one or more of pseudomonas aeruginosa, rhodotorula glutinis, acetobacter azotobacter, candida rugosa, and acidophilus stealthily.
5. The method for remediating heavy metal-contaminated soil as recited in claim 1, wherein: in the step S6, excrement can be added into the harvested plant fertilizer, and the planted sunflowers are removed after being harvested and are independently burnt, wherein the repetition period is 2-3 times.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110782584.2A CN113385530A (en) | 2021-07-12 | 2021-07-12 | Remediation method of heavy metal contaminated soil |
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| CN202110782584.2A CN113385530A (en) | 2021-07-12 | 2021-07-12 | Remediation method of heavy metal contaminated soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857228A (en) * | 2021-09-29 | 2021-12-31 | 马长凤 | Remediation method based on polluted homeland resources and space planning utilization method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064178A (en) * | 2016-06-02 | 2016-11-02 | 东莞市环境科学研究所 | A kind of method for safely planting in heavy metal pollution farmland |
| CN106216370A (en) * | 2016-08-04 | 2016-12-14 | 北京高能时代环境技术股份有限公司 | A kind of method for repairing heavy metal polluted soil of farmland |
| CN109848195A (en) * | 2019-04-19 | 2019-06-07 | 四川省生态环境科学研究院 | A kind of soil moved in improve the original restorative procedure of orchard heavy-metal contaminated soil |
| CN112916609A (en) * | 2021-03-03 | 2021-06-08 | 重庆桂溪生态环境科技有限公司 | Method for blocking and burying polluted soil |
| CN113058985A (en) * | 2020-01-03 | 2021-07-02 | 益壤（厦门）环保科技有限公司 | Heavy metal contaminated soil degradation harmless treatment method |
-
2021
- 2021-07-12 CN CN202110782584.2A patent/CN113385530A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064178A (en) * | 2016-06-02 | 2016-11-02 | 东莞市环境科学研究所 | A kind of method for safely planting in heavy metal pollution farmland |
| CN106216370A (en) * | 2016-08-04 | 2016-12-14 | 北京高能时代环境技术股份有限公司 | A kind of method for repairing heavy metal polluted soil of farmland |
| CN109848195A (en) * | 2019-04-19 | 2019-06-07 | 四川省生态环境科学研究院 | A kind of soil moved in improve the original restorative procedure of orchard heavy-metal contaminated soil |
| CN113058985A (en) * | 2020-01-03 | 2021-07-02 | 益壤（厦门）环保科技有限公司 | Heavy metal contaminated soil degradation harmless treatment method |
| CN112916609A (en) * | 2021-03-03 | 2021-06-08 | 重庆桂溪生态环境科技有限公司 | Method for blocking and burying polluted soil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857228A (en) * | 2021-09-29 | 2021-12-31 | 马长凤 | Remediation method based on polluted homeland resources and space planning utilization method thereof |
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Application publication date: 20210914 |