阅读说明：本技术 一种土壤污染修复方法 (Soil pollution remediation method ) 是由 陈晓龙 陈立青 白云云 秦晋凯 魏增 于 2021-07-23 设计创作，主要内容包括：本发明提供一种土壤污染修复方法,通过取样设备采集土壤不同深度的土壤封存并进行检测,根据污染情况通过机械设备将土壤从土地中剥离堆放；将剥离堆放的土壤与土壤修复剂混合处理,经过混合土壤修复剂的土壤堆放处理1-3天；该方法操作新颖、高效环保、成本低、省时省力、适用范围广、便于推广等优势；其持续强化受污染土壤的修复,克服传统的化学和生物修复的不足,兼顾了经济和环境效益,完全可以大面积应用于多种污染土壤的修复处理,适合对污染严重的区域土壤进行修复处理,而采用铺设缓释修复层增大了有机废物与空气接触的面积,提升了氧化的效果。(The invention provides a soil pollution remediation method, which comprises the steps of collecting soil at different depths through sampling equipment, sealing and detecting the soil, and stripping and stacking the soil from the soil through mechanical equipment according to pollution conditions; mixing the stripped and stacked soil with a soil remediation agent, and stacking the soil with the mixed soil remediation agent for 1-3 days; the method has the advantages of novel operation, high efficiency, environmental protection, low cost, time and labor saving, wide application range, convenience for popularization and the like; the remediation of polluted soil is continuously enhanced, the defects of traditional chemical and biological remediation are overcome, economic and environmental benefits are considered, the remediation treatment of various polluted soils can be completely applied to a large area, the remediation treatment of the soils in the severely polluted areas is suitable, the contact area of organic wastes and air is increased by laying the slow-release remediation layer, and the oxidation effect is improved.)

1. A soil pollution remediation method is characterized by comprising the following steps:

s1, preprocessing, collecting soil sealing deposits of different depths of the soil through sampling equipment, detecting, and stripping and stacking the soil from the land through mechanical equipment according to pollution conditions;

s2, mixing treatment, namely mixing the stripped and stacked soil with a soil remediation agent, and stacking the soil with the mixed soil remediation agent for 1-3 days;

s3, paving the stacked soil on the surface of the land for multiple backfilling, wherein the backfilling depth is controlled to be 50-100mm, laying a slow-release repairing layer on the surface of the backfilled soil, and sequentially backfilling for multiple times;

s4, covering a film, namely paving a layer of biodegradable film on the uppermost surface of the backfilled soil, and filling the biodegradable film on the edge of the backfilled soil with the soil;

and S5, detecting periodically, namely performing sampling detection on the backfilled soil periodically through sampling equipment, and detecting the content of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene in the soil until the content of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meets the requirement.

2. A soil pollution remediation method according to claim 1 further comprising: the soil remediation agent is prepared from the following components in parts by weight: 2-5 parts of polybutylene succinate, 1-3 parts of chelated zinc, 2-4 parts of sodium tripolyphosphate, 5-9 parts of mixed microbial inoculum, 3-7 parts of diatomite, 12-15 parts of cerium chloride, 11-15 parts of yttrium chloride and 65-80 parts of water, uniformly mixing the diatomite and the polybutylene succinate, wetting the mixture by taking water, uniformly mixing the mixed microbial inoculum, the chelated zinc and the mixture, standing for 15-35min, adding the cerium chloride and the yttrium chloride, adding the mixture into a water solution obtained by mixing the rest water and the sodium tripolyphosphate, then placing the mixture into ultrasonic stirring equipment, and uniformly stirring by using the ultrasonic stirring equipment to obtain the soil remediation agent.

3. A soil pollution remediation method according to claim 1 further comprising: the slow-release repairing layer is prepared from gelatin, the slow-release repairing layer is of a square block structure with the length of 400mm and the length of 400mm, a plurality of through holes are formed in the slow-release repairing layer in a rectangular equidistant mode, the diameter of each through hole is 15mm, an air exchanging cylinder is arranged between the two through holes and is of a cylindrical structure, the air exchanging cylinders extend to soil filled back into the soil from two sides, and the slow-release repairing layer is sequentially arranged.

4. A soil pollution remediation method according to claim 1 further comprising: the biodegradable film is prepared from the following components in parts by weight: 4-6 parts of starch, 2-4 parts of polyvinyl alcohol, 1-3 parts of cellulose, 2-5 parts of plasticizer and 2-5 parts of processing aid.

5. The soil pollution remediation method of claim 1, wherein the soil sampled by the sampling device in step S1 is processed in stages, the sectioned soil sample is sealed with a height of 100mm as a cut-off line, and the sealed soil sample is labeled.

6. A soil pollution remediation method according to claim 1 further comprising: the soil repairing agent is sprayed by spraying equipment, an unmanned aerial vehicle is adopted for constant-speed spraying, and the metering of the spraying is controlled to be 420-650ml/m³。

7. The soil pollution remediation method of claim 1, wherein the detection method in step S1 is as follows:

step 1, partitioning: partitioning the polluted land by utilizing a Thiessen polygon, correspondingly projecting the pollution point position data on a polluted land plane, and performing plane partitioning;

step 2, layering: carrying out layering on the polluted land, and defining a known pollution level of a polluted land layer partition; after the Thiessen polygonal subareas of the polluted land are completed in all the layers, projecting sampling sample point positions belonging to the corresponding depth stratification to the polluted land layers, and obtaining the pollution degree in the corresponding Thiessen subareas according to the sampling point pollutant data in all the layers;

step 3, data simulation: performing Krigin interpolation simulation on each layer of pollutants, comparing according to interpolation results, and supplementing unknown partition pollution levels;

and 4, data statistics: and (4) counting the repair cubic quantity of each layer, the total repair cubic quantity and the pollution partition cubic quantity of each layer.

Technical Field

The invention relates to a soil pollution remediation method, and belongs to the technical field of soil remediation.

Background

The soil is a loose surface layer having fertility on the surface of the land and capable of growing plants, and the thickness thereof is generally about 2 m. The soil not only provides mechanical support capability for plant growth, but also provides fertility factors such as water, fertilizer, gas, heat and the like required by the growth and development of the plant. As the population is rapidly increased and the industry is rapidly developed, solid wastes are continuously stacked and dumped on the surface of soil, harmful waste water continuously permeates into the soil, and harmful gas and floating dust in the atmosphere continuously fall into the soil along with rainwater, so that the soil pollution is caused.

With the continuous increase of soil pollution, the crop yield and quality are reduced, the human health is influenced indirectly through grains, vegetables, fruits and the like, and for the soil pollution treatment of dry farming farmlands, a repair method is rarely provided in the prior art, and meanwhile, the traditional soil pollution treatment has no long-term effect, the problems of incomplete pollution treatment and the like are easy to occur, so that a soil pollution repair method is needed to solve the problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a soil pollution remediation method to solve the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: a soil pollution remediation method comprises the following steps:

s1, preprocessing, collecting soil sealing deposits of different depths of the soil through sampling equipment, detecting, and stripping and stacking the soil from the land through mechanical equipment according to pollution conditions;

s2, mixing treatment, namely mixing the stripped and stacked soil with a soil remediation agent, and stacking the soil with the mixed soil remediation agent for 1-3 days;

s3, paving the stacked soil on the surface of the land for multiple backfilling, wherein the backfilling depth is controlled to be 50-100mm, laying a slow-release repairing layer on the surface of the backfilled soil, and sequentially backfilling for multiple times;

s4, covering a film, namely paving a layer of biodegradable film on the uppermost surface of the backfilled soil, and filling the biodegradable film on the edge of the backfilled soil with the soil;

and S5, detecting periodically, namely performing sampling detection on the backfilled soil periodically through sampling equipment, and detecting the content of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene in the soil until the content of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meets the requirement.

Further, the soil remediation agent is prepared from the following components in parts by weight: 2-5 parts of polybutylene succinate, 1-3 parts of chelated zinc, 2-4 parts of sodium tripolyphosphate, 5-9 parts of mixed microbial inoculum, 3-7 parts of diatomite, 12-15 parts of cerium chloride, 11-15 parts of yttrium chloride and 65-80 parts of water, uniformly mixing the diatomite and the polybutylene succinate, wetting the mixture by taking water, uniformly mixing the mixed microbial inoculum, the chelated zinc and the mixture, standing for 15-35min, adding the cerium chloride and the yttrium chloride, adding the mixture into a water solution obtained by mixing the rest water and the sodium tripolyphosphate, then placing the mixture into ultrasonic stirring equipment, and uniformly stirring by using the ultrasonic stirring equipment to obtain the soil remediation agent.

Further, the slow release is restoreed the layer and is adopted gelatin preparation to form, the slow release is restoreed the layer and is adopted 400 mm's square massive structure, and is the rectangle equidistance on the slow release restoration layer and seted up a plurality of through-hole, and the diameter of its through-hole is 15mm, and there is the inflator between two through-holes, the inflator is the cylinder structure, just the inflator extends to the soil in the backfill to both sides, the slow release restoration layer is arranged in proper order each other.

Further, the biodegradable film is prepared from the following components in parts by weight: 4-6 parts of starch, 2-4 parts of polyvinyl alcohol, 1-3 parts of cellulose, 2-5 parts of plasticizer and 2-5 parts of processing aid.

Further, the soil sampled by the sampling device in the step S1 is processed in a segmented manner, the segmented soil sample is sealed by taking the height of 100mm as a cutting line, and the sealed soil sample is labeled.

Further, the soil repairing agent is sprayed by spraying equipment, an unmanned aerial vehicle is adopted for constant-speed spraying, and the metering control of the spraying is 420-³。

Further, the detection method in step S1 is as follows:

step 1, partitioning: partitioning the polluted land by utilizing a Thiessen polygon, correspondingly projecting the pollution point position data on a polluted land plane, and performing plane partitioning;

step 2, layering: carrying out layering on the polluted land, and defining a known pollution level of a polluted land layer partition; after the Thiessen polygonal subareas of the polluted land are completed in all the layers, projecting sampling sample point positions belonging to the corresponding depth stratification to the polluted land layers, and obtaining the pollution degree in the corresponding Thiessen subareas according to the sampling point pollutant data in all the layers;

step 3, data simulation: performing Krigin interpolation simulation on each layer of pollutants, comparing according to interpolation results, and supplementing unknown partition pollution levels;

and 4, data statistics: and (4) counting the repair cubic quantity of each layer, the total repair cubic quantity and the pollution partition cubic quantity of each layer.

The invention has the beneficial effects that: according to the soil pollution remediation method, the soil is subjected to long-acting slow-release remediation treatment by utilizing the multi-layer backfilling and slow-release remediation layers, the characteristic that the slow-release remediation layers are periodically melted is effectively utilized, the polluted soil of each layer is subjected to periodic slow-release remediation treatment, the soil remediation effect is improved, and the problems of incomplete soil remediation and the like are solved.

The method has the advantages of novel operation, high efficiency, environmental protection, low cost, time and labor saving, wide application range, convenient popularization and the like; the remediation of polluted soil is continuously enhanced, the defects of traditional chemical and biological remediation are overcome, economic and environmental benefits are considered, the remediation treatment of various polluted soils can be completely applied to a large area, the remediation treatment of the soils in the severely polluted areas is suitable, the contact area of organic wastes and air is increased by laying the slow-release remediation layer, and the oxidation effect is improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a flow chart of a soil contamination remediation method of the present invention;

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1, the present invention provides a technical solution: a soil pollution remediation method comprises the following steps:

s1, preprocessing, collecting soil sealing deposits of different depths of the soil through sampling equipment, detecting, and stripping and stacking the soil from the land through mechanical equipment according to pollution conditions;

s2, mixing treatment, namely mixing the stripped and stacked soil with a soil remediation agent, and stacking the soil with the mixed soil remediation agent for 1-3 days;

s3, paving the stacked soil on the surface of the land for multiple backfilling, wherein the backfilling depth is controlled to be 50-100mm, laying a slow-release repairing layer on the surface of the backfilled soil, and sequentially backfilling for multiple times;

s4, covering a film, namely paving a layer of biodegradable film on the uppermost surface of the backfilled soil, and filling the biodegradable film on the edge of the backfilled soil with the soil;

and S5, detecting periodically, namely performing sampling detection on the backfilled soil periodically through sampling equipment, and detecting the content of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene in the soil until the content of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meets the requirement.

The soil remediation agent is prepared from the following components in parts by weight: 2-5 parts of polybutylene succinate, 1-3 parts of chelated zinc, 2-4 parts of sodium tripolyphosphate, 5-9 parts of mixed microbial inoculum, 3-7 parts of diatomite, 12-15 parts of cerium chloride, 11-15 parts of yttrium chloride and 65-80 parts of water, uniformly mixing the diatomite and the polybutylene succinate, wetting the mixture by taking water, uniformly mixing the mixed microbial inoculum, the chelated zinc and the mixture, standing for 15-35min, adding the cerium chloride and the yttrium chloride, adding the mixture into a water solution obtained by mixing the rest water and the sodium tripolyphosphate, then placing the mixture into ultrasonic stirring equipment, and uniformly stirring by using the ultrasonic stirring equipment to obtain the soil remediation agent.

The slow-release repairing layer is prepared from gelatin, the slow-release repairing layer is of a square block structure with the thickness of 400mm x 400mm, a plurality of through holes are formed in the slow-release repairing layer in a rectangular shape at equal intervals, the diameter of each through hole is 15mm, an air exchanging cylinder is arranged between the two through holes and is of a cylindrical structure, the air exchanging cylinders extend into the backfilled soil towards two sides, and the slow-release repairing layers are sequentially arranged.

The biodegradable film is prepared from the following components in parts by weight: 4-6 parts of starch, 2-4 parts of polyvinyl alcohol, 1-3 parts of cellulose, 2-5 parts of plasticizer and 2-5 parts of processing aid.

And step S1, the soil sampled by the sampling device is processed in a segmented mode, the segmented soil sample is sealed and stored by taking the height of 100mm as a cutting line, and the sealed soil sample is labeled.

The soil repairing agent is sprayed by spraying equipment, an unmanned aerial vehicle is adopted for constant-speed spraying, and the metering control of the spraying is 420-650ml/m³。

Wherein the detection method in S1 is as follows:

step 1, partitioning: partitioning the polluted land by utilizing a Thiessen polygon, correspondingly projecting the pollution point position data on a polluted land plane, and performing plane partitioning;

step 2, layering: carrying out layering on the polluted land, and defining a known pollution level of a polluted land layer partition; after the Thiessen polygonal subareas of the polluted land are completed in all the layers, projecting sampling sample point positions belonging to the corresponding depth stratification to the polluted land layers, and obtaining the pollution degree in the corresponding Thiessen subareas according to the sampling point pollutant data in all the layers;

step 3, data simulation: performing Krigin interpolation simulation on each layer of pollutants, comparing according to interpolation results, and supplementing unknown partition pollution levels;

and 4, data statistics: and (4) counting the repair cubic quantity of each layer, the total repair cubic quantity and the pollution partition cubic quantity of each layer.

Example 1: collecting soil at different depths by sampling equipment, sealing and detecting the soil, stripping and stacking the soil from the soil by mechanical equipment according to pollution conditions, mixing the stripped and stacked soil with a soil remediation agent, wherein the soil remediation agent is prepared by uniformly mixing 3 parts of diatomite and 2 parts of polybutylene succinate, wetting the soil with water, uniformly mixing 5 parts of mixed microbial inoculum and 1 part of chelated zinc with the mixed microbial inoculum, standing for 15min, adding 12 parts of cerium chloride and 11 parts of yttrium chloride, adding the mixture into a water solution prepared by mixing the rest water and 2 parts of sodium tripolyphosphate, placing the mixture in an ultrasonic stirring device, uniformly stirring by the ultrasonic stirring device to obtain the soil remediation agent, stacking the soil with the mixed soil remediation agent for 1 day, flatly spreading the stacked soil on the surface of the soil for multiple backfilling, controlling the backfilling depth to be 50mm, laying a slow-release remediation layer on the backfilled soil surface, and backfilling for multiple times in sequence, paving a layer of biodegradable film on the uppermost surface of backfilled soil, wherein the biodegradable film is prepared from 4 parts of starch, 2 parts of polyvinyl alcohol, 1 part of cellulose, 2 parts of plasticizer and 2 parts of processing aid, filling the biodegradable film at the edge of the backfilled soil with the soil, periodically sampling and detecting the backfilled soil through sampling equipment, and detecting the contents of petroleum hydrocarbon, benzanthracene and benzofluoranthene in the soil until the contents of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meet the requirements.

Example 2: collecting soil at different depths by sampling equipment, sealing and detecting the soil, stripping and stacking the soil from the soil by mechanical equipment according to pollution conditions, mixing the stripped and stacked soil with a soil remediation agent, wherein the soil remediation agent is prepared by uniformly mixing 4 parts of diatomite and 3 parts of polybutylene succinate, wetting the soil with water, uniformly mixing 6 parts of mixed microbial inoculum and 2 parts of chelated zinc with the mixed microbial inoculum, standing for 18min, adding 13 parts of cerium chloride and 12 parts of yttrium chloride, adding the mixture into a water solution prepared by mixing the rest water and 3 parts of sodium tripolyphosphate, placing the mixture in an ultrasonic stirring device, uniformly stirring by the ultrasonic stirring device to obtain the soil remediation agent, stacking the soil with the mixed soil remediation agent for 2 days, flatly spreading the stacked soil on the surface of the soil for multiple backfilling, controlling the backfilling depth to be 60mm, laying a slow-release remediation layer on the backfilled soil surface, and backfilling for multiple times in sequence, paving a layer of biodegradable film on the uppermost surface of backfilled soil, wherein the biodegradable film is prepared from 5 parts of starch, 3 parts of polyvinyl alcohol, 2 parts of cellulose, 3 parts of plasticizer and 3 parts of processing aid, filling the biodegradable film at the edge of the backfilled soil with the soil, periodically sampling and detecting the backfilled soil through sampling equipment, and detecting the contents of petroleum hydrocarbon, benzanthracene and benzofluoranthene in the soil until the contents of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meet the requirements.

Example 3: collecting soil at different depths by sampling equipment, sealing and detecting the soil, stripping and stacking the soil from the soil by mechanical equipment according to pollution conditions, mixing the stripped and stacked soil with a soil remediation agent, wherein the soil remediation agent is prepared by uniformly mixing 6 parts of diatomite and 4 parts of polybutylene succinate, wetting the soil with water, uniformly mixing 8 parts of mixed microbial inoculum and 2 parts of chelated zinc with the mixed microbial inoculum, standing for 30min, adding 14 parts of cerium chloride and 14 parts of yttrium chloride, adding the mixture into a water solution prepared by mixing the rest water and 3 parts of sodium tripolyphosphate, placing the mixture in an ultrasonic stirring device, uniformly stirring by the ultrasonic stirring device to obtain the soil remediation agent, stacking the soil with the mixed soil remediation agent for 2 days, flatly spreading the stacked soil on the surface of the soil for multiple backfilling, controlling the backfilling depth to be 90mm, laying a slow-release remediation layer on the backfilled soil surface, and backfilling for multiple times in sequence, paving a layer of biodegradable film on the uppermost surface of backfilled soil, wherein the biodegradable film is prepared from 5 parts of starch, 3 parts of polyvinyl alcohol, 2 parts of cellulose, 4 parts of plasticizer and 4 parts of processing aid, filling the biodegradable film at the edge of the backfilled soil with the soil, periodically sampling and detecting the backfilled soil by using sampling equipment, and detecting the contents of petroleum hydrocarbon, benzanthracene and benzofluoranthene in the soil until the contents of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meet the requirements.

Example 4: collecting soil at different depths by sampling equipment, sealing and detecting the soil, stripping and stacking the soil from the soil by mechanical equipment according to pollution conditions, mixing the stripped and stacked soil with a soil remediation agent, wherein the soil remediation agent is prepared by uniformly mixing 7 parts of diatomite and 5 parts of polybutylene succinate, wetting the soil with water, uniformly mixing 9 parts of mixed microbial inoculum and 3 parts of chelated zinc with the mixed microbial inoculum, standing for 35min, adding 15 parts of cerium chloride and 15 parts of yttrium chloride, adding the mixture into a water solution prepared by mixing the residual water and 4 parts of sodium tripolyphosphate, placing the mixture in an ultrasonic stirring device, uniformly stirring by the ultrasonic stirring device to obtain the soil remediation agent, stacking the soil with the mixed soil remediation agent for 3 days, flatly spreading the stacked soil on the surface of the soil for multiple backfilling, controlling the backfilling depth to be 100mm, laying a slow-release remediation layer on the backfilled soil surface, and backfilling for multiple times in sequence, paving a layer of biodegradable film on the uppermost surface of backfilled soil, wherein the biodegradable film is prepared from 6 parts of starch, 4 parts of polyvinyl alcohol, 3 parts of cellulose, 5 parts of plasticizer and 5 parts of processing aid, filling the biodegradable film at the edge of the backfilled soil with the soil, periodically sampling and detecting the backfilled soil through sampling equipment, and detecting the contents of petroleum hydrocarbon, benzanthracene and benzofluoranthene in the soil until the contents of the petroleum hydrocarbon, the benzanthracene and the benzofluoranthene meet the requirements.

Comparative example 1: treating the polluted soil according to the treatment method in the prior art, and then detecting the contents of petroleum hydrocarbon, benzoanthracene and benzofluoranthene.

By combining the comparison document 1 and the examples 1 to 4, the soil pollution remediation method provided by the invention has the advantages of obvious effect of removing various pollutants in the polluted soil, short remediation period, high efficiency, environmental protection, low cost, time and labor saving, wide application range and convenience in popularization; the method continuously strengthens the remediation of the polluted soil, overcomes the defects of the traditional chemical and biological remediation, gives consideration to economic and environmental benefits, and can be completely applied to the remediation treatment of various polluted soils in a large area.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.