CN105964666A - Soil restoration method - Google Patents
Soil restoration method Download PDFInfo
- Publication number
- CN105964666A CN105964666A CN201610348931.XA CN201610348931A CN105964666A CN 105964666 A CN105964666 A CN 105964666A CN 201610348931 A CN201610348931 A CN 201610348931A CN 105964666 A CN105964666 A CN 105964666A
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- Prior art keywords
- soil
- magnetic
- well
- pipe
- polluted area
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a soil restoration method. The soil restoration method comprises the steps that steam is injected into a contaminated zone; the method that magnetic adsorptive materials are carried with airflow is adopted, the magnetic adsorptive materials are pushed to the contaminated zone through air passages of a plurality of vertical injection wells and air passages of horizontal extending wells arranged on at least one vertical injection well; and the vertical injection wells enable the ground and the contaminated zone to communicate. A fluid conveying method is adopted so that the magnetic adsorptive materials can be fast conveyed into the contaminated zone to be combined with magnetic metal; and due to the fluid conveying method, a relatively large contaminated zone can be operated, and therefore, the technical defects that the magnetic adsorptive materials and heavy-metal-containing soil are stirred together in the prior art so that the efficiency is low, the uniformity is poor, and the stirring method is not suitable for large-scale removal of heavy metal are prevented, and the adsorption efficiency of the magnetic adsorptive materials is improved.
Description
Technical field
The present invention relates to technical field of soil remediation, be specifically related to the removal side of a kind of heavy metal in soil
Method.
Background technology
Heavy metal is the typical pollutant type of soil environment, its Typical Representative such as cadmium, hydrargyrum, lead, arsenic
Deng, generally have and be distributed wide, disguised strong and endanger serious feature, heavy metal pollution cause
The health of people in the disease serious harm such as minamata disease, nervous system injury.Therefore, in soil
Heavy metal carry out administering with remove be in recent years environmental area pay close attention to problem.
The most conventional remediation of heavy metal-contaminated soil mainly includes phytoremediation technology and electrochemistry
Technology.The phytoremediation technology removal efficiency of heavy metals of a year, normally only at about 10%-15%, is repaired
Inefficient.In electrochemical rehabilitation technology, use electrochemical method that the metal ion in soil is carried out
Negative electrode extracts, but this kind of method is higher for the requirement of equipment, and, due to heavy metal chemical
Matter is the most stable, causes electrochemical reaction rates relatively slow, so being unfavorable for the metal ion to big region
It is removed.
Patent documentation CN102319725A discloses a kind of magnetic selection method removing heavy metal in soil, first
In the soil after overregulating moisture content, first uniformly add magnetic adsorptive material, then periodically to soil
It is stirred with magnetic adsorptive material, makes this magnetic adsorptive material fully adsorb the heavy metal in soil,
The most again by the mode of magnetic separation by magnetic adsorptive material sucking-off, thus complete the removal of heavy metal.Should
Method needs often to be stirred in processing procedure, and the holding soil moisture that adds water, and is relatively specific for
Operate after little area soil is dug out, for large-scale soil pollution, owing to pollutant are positioned at
Below soil, soil pollution area is relatively big simultaneously, cause being difficult to accomplishing by pollutant and adsorbing material and
Moisture mixes, thus cannot ensure the uniformity repaired, and remediation efficiency is low.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome heavy metal in soil in prior art dirty
Thing minimizing technology efficiency is low for dye, lack of homogeneity and be unsuitable for the technological deficiency removed on a large scale.
Therefore, the present invention provides a kind of soil remediation method, comprises the steps, notes to Polluted area
Enter water vapour；Use air-flow to carry the mode of magnetic adsorptive material, described magnetic adsorptive material is passed through
The air flue vertically injected and the air flue of horizontal-extending well are pushed to described Polluted area；Wherein, described perpendicular
The straight well that injects is several, and it is aboveground that horizontal-extending well is arranged at least one described vertical injection, described
Vertically inject well connection ground and Polluted area.
The described magnetic adsorptive material used is activated carbon and CuFe2O4Mixture.
Described activated carbon and described CuFe2O4Ratio be between 1:1.2-1.6.
In the step injecting water vapour to pollutant region, water vapour injects after terminating, Polluted area
Water content between 15%-18%.
After inject the step of steam to pollutant region, also include injecting acid in Polluted area
Property solution, makes the pH value of described Polluted area maintain between 3-5.
Meanwhile, the present invention provides a kind of soil restoring device, including: several vertically inject well, institute
Stating and vertically inject well connection ground and pollutant region, described vertical injection is aboveground arranges air flue；Some
Individual horizontal-extending well, it is aboveground that connection is arranged at least one described vertical injection, described horizontal-extending well
On air flue is set；Injection device, stretches in described vertical injection well, is used for injecting magnetic adsorptive material.
Described injection device includes supervisor, and described main tube body is provided with some first pores；And water
Flat arm, the most a set of, described arm connects setting with described supervisor, if arranging on described arm
Dry second pore.
Described arm is composite bushing, and described composite bushing includes the pipe of several nested encryptions, if
The pipe of dry nested encryptions has same axis, different inner diameters.
In the pipe of several nested encryptions, near the internal diameter of pipe of described supervisor in horizontal direction
Maximum, minimum farthest away from the internal diameter of the pipe of described supervisor.
Technical solution of the present invention, has the advantage that
1. the soil remediation method that the present invention provides, comprises the steps, injects water to Polluted area and steams
Vapour；Air-flow is used to carry the mode of magnetic adsorptive material, by described magnetic adsorptive material by vertically note
The air flue entered and the air flue of horizontal-extending well are pushed to described Polluted area；Wherein, described vertical injection
Well is several, and it is aboveground that horizontal-extending well is arranged at least one described vertical injection, described vertical note
Enter well connection ground and Polluted area.
By injecting water vapour to Polluted area, the moisture content of soil, beneficially soil can be improved
Grain appropriateness dispersion, the absorption for later stage magnetic adsorptive material creates conditions.By using air-flow to carry magnetic
The mode of property adsorbing material, is pushed to described magnetic adsorptive material described Polluted area, can make magnetic
Property adsorbing material transports rapidly to Polluted area, and combines with magnetic metal；By vertically
The air flue of the air flue and horizontal-extending well that inject well injects magnetic adsorptive material, can be to bigger pollution
Region operates, and uniformity is good, improves the adsorption efficiency of magnetic adsorptive material.
2. the present invention provide soil remediation method, the described magnetic adsorptive material of employing be activated carbon and
CuFe2O4Mixture, described activated carbon and described CuFe2O4Ratio be between 1:1.2-1.6.
CuFe2O4There is magnetic, it is possible to the magnetic metal in absorption soil, such as cadmium, arsenic, ferrum, lead etc.
Element, makes the two become magnetic metal group；The porosity of absorbent charcoal material is higher, the magnetic gold of formation
After genus group meets with activated carbon under action of a fluid, the space in activated carbon will accommodate magnetic metal group,
So that magnetic metal is fixed in the middle of activated carbon, improve adsorption effect.
3. the soil remediation method that the present invention provides, in the step injecting water vapour to Polluted area,
Steam injects after terminating, and the water content of Polluted area is between 15%-18%.
Soil keeps certain moisture content, beneficially soil particle appropriateness dispersion, heavy metal can be strengthened
Ion is fully contacted with active carbon adsorption material, increases adsorption area.
4. the soil remediation method that the present invention provides, after inject the step of steam to Polluted area,
Also include in Polluted area inject acid solution, make the pH value of described Polluted area maintain 3-5 it
Between.
Major part heavy metal ion is easier to occur to dissolve and migrate in acid condition, is conducive to soil
The gathering of magnetic metal in earth, thus easy and CuFe2O4Between react, beneficially magnetic metal
The removal of ion.
5. the soil restoring device that the present invention provides, including: several vertically inject well, described vertically
Injecting well connection ground and pollutant region, described vertical injection is aboveground arranges air flue；Several levels
Extended reach well, it is aboveground that connection is arranged at least one described vertical injection, described horizontal-extending aboveground setting
Air flue；Injection device, stretches in described vertical injection well, carries magnetic adsorptive material for injection.
Described injection device carries magnetic adsorptive material, by vertically injecting well and horizontal injection well,
Magnetic adsorptive material can be made farthest to combine with the magnetic heavy metal in air flue.
6. the soil restoring device that the present invention provides, described injection device includes supervisor, described supervisor's pipe
Body is provided with some first pores；And horizontal branch pipe, the most a set of, described arm and described master
Pipe connection is arranged, and described arm arranges some second pores.
By supervisor and horizontal branch pipe so that the injection scope of magnetic adsorptive material includes vertically and water
Flat both direction, thus increase effectively the adsorption area of adsorbing material, improve magnetic adsorptive material
With the joint efficiency of magnetic heavy metal in soil.
7. the soil restoring device that the present invention provides, described arm is composite bushing, described composite bushing
Including the pipe of several nested encryptions, the pipe of several nested encryptions has same axis, different
Internal diameter.In the pipe of several nested encryptions, near in the pipe of described supervisor in horizontal direction
Footpath is maximum, minimum farthest away from the internal diameter of the pipe of described supervisor.
The nested arm arranged can better profit from the space within pipe, during use, by internal diameter relatively
Little inside pipe is stretched next, increases the active area of magnetic adsorptive material, uses nesting side simultaneously
Formula is conducive to the installation to arm and transport.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, under
The accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described by face,
It should be evident that the accompanying drawing in describing below is some embodiments of the present invention, general for this area
From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings
Obtain other accompanying drawing.
The structural representation of injection device described in the embodiment of the offer that Fig. 1 is the present invention；
Description of reference numerals:
1-is responsible for；2-the first pore；3-the second pore；4-pipe
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that
Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on this
Embodiment in bright, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly fall into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, " left ",
Orientation or the position relationship of the instruction such as " right ", " vertically ", " level ", " interior ", " outward " are based on attached
Orientation shown in figure or position relationship, be for only for ease of description the present invention and simplify describe rather than
Instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, is therefore not considered as limiting the invention.Additionally, term " first ", " second ", "
Three " it is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, art
Language " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing,
Can also be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；
Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two element internals
Connection.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
As long as additionally, technical characteristic involved in invention described below difference embodiment that
The conflict of not constituting between this just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of soil remediation method, comprises the steps, injects water to Polluted area
Steam；Air-flow is used to carry the mode of magnetic adsorptive material, by described magnetic adsorptive material by vertically
The air flue injected and the air flue of horizontal-extending well are pushed to described Polluted area；Wherein, described vertical note
Entering well is several, and it is aboveground that horizontal-extending well is arranged at least one described vertical injection, described vertically
Inject well connection ground and Polluted area.
By injecting water vapour to Polluted area, the moisture content of soil, beneficially soil can be improved
Grain appropriateness dispersion, the absorption for later stage magnetic adsorptive material creates conditions.By using air-flow to carry magnetic
The mode of property adsorbing material, is pushed to described magnetic adsorptive material described Polluted area, can make magnetic
Property adsorbing material transports rapidly to Polluted area, and combines with magnetic metal；By vertically
The air flue of the air flue and horizontal-extending well that inject well injects magnetic adsorptive material, can be to bigger pollution
Region operates, and uniformity is good, improves the adsorption efficiency of magnetic adsorptive material.
As preferred embodiment, the described magnetic adsorptive material of employing is activated carbon and CuFe2O4's
Mixture, and described activated carbon and described CuFe2O4Ratio be between 1:1.2-1.6.
Concrete, CuFe2O4There is magnetic, it is possible to absorption soil in magnetic metal, as cadmium, arsenic,
Ferrum, lead and other elements, make the two become magnetic metal group；The porosity of absorbent charcoal material is higher, is formed
Magnetic metal group meet with activated carbon under action of a fluid after, the space in activated carbon will accommodate magnetic
Property metal group so that magnetic metal is fixed in the middle of activated carbon, improve adsorption effect.
As replacement, described CuFe2O4Other magnetic material can be used, such as MnFe2O4Deng material, this
Class material has magnetic equally, can adsorb the magnetic heavy metal in soil.
As preferred embodiment, in the step injecting water vapour to Polluted area, steam injects
After end, the water content of Polluted area between 15%-18%, such as 15%, 16% and 18% etc..
Soil keeps certain moisture content, beneficially soil particle appropriateness dispersion, heavy metal can be strengthened
Ion is fully contacted with active carbon adsorption material, increases adsorption area.
Concrete, in described Polluted area injects the step of water vapour, steam by described vertically
Injection well is from entrance underground, the external world, and is diffused into the horizontal zone of Polluted area by horizontal-extending well.
As preferred embodiment, after inject the step of steam to Polluted area, also include
In Polluted area, inject acid solution, make the pH value of described Polluted area maintain between 3-5.
Major part heavy metal ion is easier to occur to dissolve and migrate in acid condition, is conducive to soil
The gathering of magnetic metal in earth, thus easy and CuFe2O4Between react, beneficially magnetic metal
The removal of ion.
Concrete, described acid solution can with in steam simultaneous implantation to pollutant region.Use
Acid solution can be the hydrochloric acid solution being susceptible to gasification, or the organic acid of solution evaporation,
Organic acid is generally of effumability, in completing soil after the absorption of magnetic heavy metal, permissible
Pollutant region is heated so that organic acid is heated and volatilizees away from soil.
Embodiment 2
The present embodiment provides a kind of soil restoring device, including: several vertically inject well, described perpendicular
The straight well that injects connects ground and pollutant region, and described vertical injection is aboveground arranges air flue；Several water
Flat extended reach well, to be arranged at least one described vertical injection aboveground in connection, described horizontal-extending aboveground sets
Put air flue；Injection device, stretches in described vertical injection well, carries magnetic adsorptive material for injection.
Described injection device carries magnetic adsorptive material, by vertically injecting well and horizontal injection well,
Magnetic adsorptive material can be made maximum with in horizontal injection well at vertically injection well and in air flue
Magnetic heavy metal combines.
As preferred embodiment, as it is shown in figure 1, described injection device includes being responsible for 1, described master
Pipe 1 body is provided with some first pores 2；And horizontal branch pipe, the most a set of, described arm with
Described supervisor 1 connects setting, and described arm arranges some second pores 3.
Specifically, the arm having some second pores 3 connects with described supervisor 1 and is horizontally disposed with,
When described pipeline is for the injection of magnetic adsorptive material, can effectively increase the injection area of entirety,
Thus improve the extraction efficiency for gas and extracting ability.
In concrete injection process, magnetic adsorptive material first passes through supervisor 1 from entrance underground, ground,
Then flow out from some first pores 2, enter in the middle of vertical air flue.Horizontal branch pipe is connected to be responsible for 1
On, magnetic adsorptive material exits into inside horizontal branch pipe from described first pore 2, and from level
Exit in horizontal air flue at the second pore 3 offered on arm, make whole pollutant region is divided
Cloth magnetic adsorptive material.
As modification, described horizontal branch pipe can and described supervisor 1 between arrange at an angle, two
Angle between person can be between 0-90 degree.
As preferred embodiment, described arm is composite bushing, and described composite bushing includes some
The pipe 4 of individual nested encryptions, the pipe 4 of several nested encryptions has same axis, different inner diameters.
In the pipe 4 of several nested encryptions, near the pipe 4 of described supervisor 1 in horizontal direction
Internal diameter maximum, minimum farthest away from the internal diameter of the pipe 4 of described supervisor 1.
The nested arm arranged can better profit from the space within pipe 4, during use, by internal diameter
Less inside pipe 4 stretches out, and the active area of the magnetic adsorptive material of increase uses simultaneously
Nested mode is conducive to the installation to arm and transport
As preferred embodiment, in the pipe 4 of several nested encryptions, horizontal direction is leaned on most
The internal diameter of the pipe 4 of nearly described supervisor 1 is maximum, farthest away from described supervisor 1 pipe 4 internal diameter
Little.
Specifically, by above-mentioned set-up mode, the convenient formation on the bearing of trend of arm when extracting
Barometric gradient, the internal diameter of the pipe 4 of farthest is minimum, and negative pressure is stronger, it is simple to extracting；Further, from
As far as closely forming barometric gradient, it is simple to vapor phase contaminants is towards the direction motion of supervisor 1, it is possible to ensure
The extraction rate was acquired of the pipe 4 of farthest, improves extracting ability and extraction efficiency.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to embodiment party
The restriction of formula.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also all of embodiment being given
With exhaustive.And the obvious change thus extended out or variation are still in the guarantor of the invention
Protect among scope.
Claims (9)
1. a soil remediation method, it is characterised in that comprise the steps,
Water vapour is injected to Polluted area；
Air-flow is used to carry the mode of magnetic adsorptive material, by described magnetic adsorptive material by vertically note
The air flue of the air flue and horizontal-extending well that enter well is pushed to described Polluted area；
Wherein, described vertical injection well is several, and it is described perpendicular that horizontal-extending well is arranged at least one
Straight injection is aboveground, described vertical injection well connection ground and Polluted area.
Soil remediation method the most according to claim 1, it is characterised in that the described magnetic of employing
Property adsorbing material is activated carbon and CuFe2O4Mixture.
Soil remediation method the most according to claim 2, it is characterised in that described activated carbon with
Described CuFe2O4Ratio be between 1:1.2-1.6.
4. according to the soil remediation method according to any one of claim 1-3, it is characterised in that to
Pollutant region is injected in the step of water vapour, and water vapour injects after terminating, the water content of Polluted area
Between 15%-18%.
5. according to the soil remediation method according to any one of claim 1-4, it is characterised in that
After the step of steam is injected in pollutant region, also include
In Polluted area, inject acid solution, make the pH value of described Polluted area maintain between 3-5.
6. a soil restoring device, including:
Several vertically inject well, and described vertical injection well connects ground and pollutant region, described perpendicular
Straight injection is aboveground arranges air flue；
Several horizontal-extending wells, it is aboveground that connection is arranged at least one described vertical injection, described water
On flat extended reach well, air flue is set；
Injection device, stretches in described vertical injection well, is used for injecting magnetic adsorptive material.
Soil restoring device the most according to claim 6, it is characterised in that described injection device
Including
Supervisor (1), described main tube body is provided with some first pores (2)；And
Horizontal branch pipe, the most a set of, described arm connects setting, on described arm with described supervisor
Some second pores (3) are set.
Soil restoring device the most according to claim 7, it is characterised in that described arm is multiple
Trap pipe, described composite bushing includes the pipe (4) of several nested encryptions, several nested encryptions
Pipe (4) there is same axis, different inner diameters.
Soil restoring device the most according to claim 8, it is characterised in that several are nested even
In the pipe connect, in horizontal direction, the internal diameter of pipe near described supervisor is maximum, farthest away from described
The internal diameter of the pipe of supervisor is minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610348931.XA CN105964666B (en) | 2016-05-24 | 2016-05-24 | Soil remediation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610348931.XA CN105964666B (en) | 2016-05-24 | 2016-05-24 | Soil remediation method |
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| Publication Number | Publication Date |
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| CN105964666A true CN105964666A (en) | 2016-09-28 |
| CN105964666B CN105964666B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610348931.XA Active CN105964666B (en) | 2016-05-24 | 2016-05-24 | Soil remediation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634590A (en) * | 2021-08-13 | 2021-11-12 | 明达海洋工程有限公司 | Geological soil restoration treatment system |
| CN114431053A (en) * | 2022-01-13 | 2022-05-06 | 重庆市奉节县多品农业发展有限公司 | Green high-yield soil remediation method for navel oranges in old orchard |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634590A (en) * | 2021-08-13 | 2021-11-12 | 明达海洋工程有限公司 | Geological soil restoration treatment system |
| CN114431053A (en) * | 2022-01-13 | 2022-05-06 | 重庆市奉节县多品农业发展有限公司 | Green high-yield soil remediation method for navel oranges in old orchard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105964666B (en) | 2019-12-10 |
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