CN110293125A - It is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device and method - Google Patents
It is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device and method Download PDFInfo
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- CN110293125A CN110293125A CN201910347506.2A CN201910347506A CN110293125A CN 110293125 A CN110293125 A CN 110293125A CN 201910347506 A CN201910347506 A CN 201910347506A CN 110293125 A CN110293125 A CN 110293125A
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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
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
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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
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
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- 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)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of electro reclamation in situ and the device and method for reinforcing ultra-soft Polluted Soil.Core of the invention is double-layer electric pole pipe, the double-layer electric pole pipe includes outer electrode pipe, parallel nested in outer layer electrode tube and non-touching internal layer electrode pipe, and several one end are fixed on inside outer electrode pipe and the other end is fixed on the insulating carriage outside internal layer electrode pipe, the pipe shaft of the outer electrode pipe and the internal layer electrode pipe is covered with aperture and is coated with filter cloth.The present invention carries out drainage by electroosmosis and electro reclamation to ultra-soft Polluted Soil by double-layer electric pole pipe, solves the problems, such as that the pollutant being gathered near electrode and water are not easy to remove, and structure is simple, easy to operate, high-efficient and at low cost.
Description
Technical field
The invention belongs to environment protection fields, and in particular to it is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device
And method.
Background technique
With industry, the increase of the aggravation of municipal pollution and agrochemicals type, quantity, Chinese soil pollution shape
Gesture is quite severe, and the land area of the heavy metals exceeding standards such as As, Hg, Pb, Cd is being continuously increased, and has caused the concern in the whole world.I
The arable land of 8% or more state by heavy metal pollution, be distributed in Yangtze River Delta, the Delta of the Pearl River, Jing-jin-ji region, Liao Zhongnan, southwest and
The regions such as northwest directly reduce about 10,000,000,000 kilograms of grain yield every year.Industrial enterprise place and mining area and its ambient contamination add
Play, it is heavy metal-polluted including the old industrial bases such as metal smelt, plating, steel plant, insecticide factory, chemical plant and non-ferrous metal mining area
Dye is particularly acute.A large amount of presence of " pesticide-clay mixture ", cause food quality and yield constantly decline and surface water and underground water it is dirty
Other secondary ecological environment problems such as dye, atmosphere pollution and ecosystem degradation, are directly detrimental to health, influencing the mankind can hold
Supervention exhibition.The 5th meeting of 13rd Standing Committee of the National People's Congress in 2018 passes through the " People's Republic of China (PRC)
Soil temperature and soil moisture content ", it clearly proposes and supports soil pollution risk management and control and reparation, improve soil environment quality, ensure life
State environment and food security, it has also become the great current demand of country.
Ultra-soft polluted soil subgrade geological conditions is inevitably encountered during developing and using soil, for ultra-soft
How the features such as Polluted Soil water content height, poor permeability, low intensity realizes its pollution amelioration and discharging consolidation is currently urgently to solve
Certainly the problem of.Drainage by electroosmosis is considered a kind of be suitable for super reinforcement of soft soil green foundation treatment technology, at the same time, in direct current
Under electric field action, pollutant that is water-soluble or being adsorbed on soil particle and organic matter surface is according to respectively electrically charged different difference
It is mobile to anodic-cathodic direction, the H that anode surface electrolysis water generates+To during movable cathode, break pollutant and soil particle
Or the associative key of organic matter, it is easy to pollutant and migrates in the electric field.Can not only the soil body be made to arrange as it can be seen that electro-osmosis method reinforces ultra-soft soil
Water consolidation, and the pollutants such as heavy metal facilitated in the soil body are discharged with electroosmotic flow.It is small, cheap to inject effect on environment
Chemical reagent drainage by electroosmosis and electrokinetic remediation efficiency are had a significant impact.However, that there are the following problems is difficult so far for the technology
To solve: after treatment, the pollutant concentration for being gathered in the soil body near electrode is still higher, and the water content of soil near cathode is still
Higher, soil stabilization and remediation efficiency do not reach requirement.
Summary of the invention
Goal of the invention: the device and method that a kind of electro reclamation in situ is provided and reinforces ultra-soft Polluted Soil, it is existing to solve
The above problem existing for technology.
Technical solution: it is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device be double-layer electric pole pipe, the bilayer
Electrode tube include outer electrode pipe, parallel nested in outer layer electrode tube and non-touching internal layer electrode pipe and several
One end is fixed on inside outer electrode pipe and the other end is fixed on the insulating carriage outside internal layer electrode pipe, the outer electrode
The pipe shaft of pipe and the internal layer electrode pipe is covered with aperture and is coated with filter cloth.
In a further embodiment, outer electrode pipe and internal layer electrode pipe are all made of conductive plastic material, insulation
Support frame uses PVC material, and operating personnel can be made when moving, assembling double-layer electric pole pipe, and the electrostatic of human body is run to underground, really
Protect the safety of operating personnel；PVC material has stable physical property and certain resistance to chemical corrosion and quite steady to salt
It is fixed, it is ensured that insulating carriage keeps original state when two-layer electrode pipe works.
In a further embodiment, it is enclosed with one copper wire connecting line in outer electrode pipe and internal layer motor pipe, to outer
Layer electrode tube connects DC power supply with internal layer electrode pipe and provides a carrier, it is ensured that outer electrode pipe and internal layer electrode pipe can be used as
Cathode or anode.
In a further embodiment, double-layer electric pole pipe both ends are equipped with dismountable tube body bolted joint, are convenient for work
Journey technical staff adjusts the length of double-layer electric pole pipe according to operating condition, while being also convenient for the transport, construction and disassembly of double-layer electric pole pipe.
In a further embodiment, the internal diameter of the outer electrode pipe is 100 ~ 300mm, and wall thickness is 0.5 ~ 2.5mm；Institute
The internal diameter for stating internal layer electrode pipe is 50 ~ 100mm, and wall thickness is 0.5 ~ 2.5mm, it can be ensured that outer electrode pipe and internal layer electrode pipe are mutual
It does not contact, and can ensure that wall thickness can sustain the pressure of liquid in pipe.
It is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil method, it is characterised in that the following steps are included:
The first step, soil sampling get the pollutant concentration in soil sample with X-ray fluorescence spectra (XRF) technology measurement；
Second step seals the bottom of internal layer electrode pipe with cap, squeezes into several groups double-layer electric pole pipe, two-phase in ultra-soft soil site
Spacing is 1 ~ 2m and is in rectangle or quincuncial arrangement between adjacent double-layer electric pole pipe；
Third step connects the positive and negative anodes of the copper wire connecting line of the internal layer electrode pipe of each group double-layer electric pole pipe and DC power supply, to
Injection facilitates the salting liquid of contaminant transportation, acid solution, chelating agent or surfactant etc. in the soil body in internal layer electrode pipe
Chemical solution opens DC power supply, and positively charged pollutant is made to flow to cathodic migration with electric osmose, negatively charged pollutant to
Anode direction migration；
4th step closes DC power supply when soil pollution object concentration is 3~5 times of original test concentrations near electrode, will in
Electrolyte in layer electrode tube extracts away, extracts heavy metal using the method for chemistry；
5th step, piece solid electrode stick of center insertion in internal layer electrode tube, and acidic electrolysis is injected in inner layer electrode tube
Liquid, the copper wire connecting line of outer electrode pipe connect DC power anode, and solid electrode stick connects the cathode of DC power supply, open straight
Galvanic electricity source moves to the pollutant converged at around double-layer electric pole pipe and water transport in the electrolyte in internal layer electrode pipe；
Soil pollution object concentration outside 6th step, internal layer electrode pipe to be tested is lower than construction land soil pollution risk management and control mark
Standard closes DC power supply, and the electrolyte in internal layer electrode pipe is extracted out, extracts heavy metal using the method for chemistry；
7th step is inserted into a solid electrode stick in internal layer electrode tube center, injects mud, outer electrode in inner layer electrode tube
The copper wire connecting line of pipe connects DC power cathode, and solid electrode stick connects the anode of DC power supply, opens DC power supply, will converge
Gather in the mud in the positively charged Contaminants Transport to internal layer electrode pipe around double-layer electric pole pipe；
Soil pollution object concentration outside 8th step, internal layer electrode pipe to be tested is lower than construction land soil pollution risk management and control mark
Standard closes DC power supply, and the mud in internal layer electrode pipe is extracted out, extracts heavy metal using the method for chemistry；
9th step, on the basis of the 7th step and eight steps, the copper wire connecting line of outer electrode pipe is connected to DC power supply
Anode, solid electrode stick connect the cathode of DC power supply；
Tenth step repeats third step to the 9th step, until completing the reparation and reinforcing to entire ultra-soft pollution soil site.
In a further embodiment, the infiltration coefficient of ultra-soft Polluted Soil is 10- 6~10- 9Cm/s, it can be ensured that the liquid of addition
Physical efficiency infiltration is entered.
In a further embodiment, the solution for facilitating contaminant transportation in the soil body for injecting internal layer electrode pipe is selected
CaCl2, the small molecular organic acids solution such as salting liquids and citric acid, lactic acid such as NaCl, surfactant, the chelating of injection
EDTA, beta-cyclodextrin, Tween 80 or brij35 etc. can be selected in agent or complexing agent, and selection facilitates contaminant transportation in the soil body
Solution it is cheap and environmentally friendly, salting liquid may advantageously facilitate electroosmotic flow, make positively charged pollutant with electroosmotic flow
It is migrated to cathode direction.
It is being further in embodiment, the electrolyte of injection internal layer electrode pipe selects the low concentrations such as citric acid or lactic acid solution
Small molecular organic acid, the water content of the mud of injection should be not less than 150%, electrolyte can be made by soil absorption.
The utility model has the advantages that core of the invention device is double-layer electric pole pipe, ultra-soft Polluted Soil is realized by the device in situ
Electro reclamation and reinforcing solve the problems, such as that traditional electric repairing technique makes contaminants be difficult to remove near electrode, and
Further removal is gathered in pollutant and water near electrode, improves the removal rate of pollutant, increases stabilization by drainage effect；This
Outer the configuration of the present invention is simple, it is easy to operate, it can quickly and efficiently realize in-situ immobilization and the reinforcing of ultra-soft Polluted Soil.
Detailed description of the invention
Fig. 1 is electro reclamation in situ of the invention and the apparatus structure schematic diagram for reinforcing ultra-soft Polluted Soil.
Fig. 2 is the structural schematic diagram under step S2 working condition in claim 10 of the invention.
Fig. 3 is the structural schematic diagram under step S3 working condition in claim 10 of the invention.
Each appended drawing reference in figure are as follows: outer electrode pipe 1, internal layer electrode pipe 2, aperture 3, insulating carriage 4, copper wire connecting line
5, DC power supply 6, solid electrode stick 7.
Specific embodiment
In the following description, a large amount of concrete details are given so as to provide a more thorough understanding of the present invention.So
And it is obvious to the skilled person that the present invention may not need one or more of these details and be able to
Implement.In other examples, in order to avoid confusion with the present invention, for some technical characteristics well known in the art not into
Row description.
A kind of embodiment about electro reclamation in situ and the device for reinforcing ultra-soft Polluted Soil
As shown in Figure 1, the present embodiment is mainly double-layer electric pole pipe, the double-layer electric pole pipe includes outer electrode pipe 1, internal layer electrode
It pipe 2 and several insulating carriages 4, the outer electrode pipe 1 and 2 parallel nested of internal layer electrode pipe and is not in contact with each other, outer layer is electric
The pipe shaft of pole pipe 1 and internal layer electrode pipe 2 is covered with aperture 3, and inside is enclosed with one copper wire connecting line 5 and is coated with filter
Cloth is made by that can lead plastics, and described 4 one end of insulating carriage is fastened on inside outer electrode pipe 1, and the other end is fixed on interior
Layer electrode tube 2, is made of PVC.
About a kind of electro reclamation in situ and the embodiment for the method for reinforcing ultra-soft Polluted Soil
Embodiment 1
The present embodiment is that the preparation of electro reclamation carries out following step:
(1) taking infiltration coefficient is 10- 6~10- 9The soil sample of the super Polluted Soil of cm/s, with X-ray fluorescence spectra (XRF) technology
The pollutant concentration in soil sample is got in measurement；
(2) engineers and technicians according to operating condition carry out the multiple groups that are spirally connected in two-layer electrode length of tube direction on ultra-soft soil site
Dress, the bottom of internal layer electrode pipe 2 is sealed with cap, is disposed several groups double-layer electric pole pipe using mechanical punching or artificial plug
In ultra-soft soil field, spacing is 1 ~ 2m between adjacent double-layer electric pole pipe two-by-two, and double-layer electric pole pipe is in rectangle or quincunx cloth
It sets；
Embodiment 2
The present embodiment is that electro reclamation removes pollutant progress following step:
(1) the copper wire connecting line 5 of the internal layer electrode pipe 2 of each group double-layer electric pole pipe is connect with the positive and negative anodes of DC power supply 6, inwardly
Injection facilitates the change such as the salting liquid of contaminant transportation, acid solution, chelating agent or surfactant in the soil body in layer electrode tube 2
Solution is learned, opens DC power supply 6, under the action of DC electric field, positively charged pollutant flows to cathodic migration, band with electric osmose
The pollutant of negative electrical charge is migrated to anode direction；
(2) concentration of pollutant closes DC power supply 6 when concentration is 3 ~ 5 times of original test concentrations near test electrode,
By the solution extraction in internal layer electrode pipe 2, the method for recycling chemistry, which is such as replaced, extracts heavy metal；
Embodiment 3
The present embodiment is that the pollutant that further removal is gathered near double-layer electric pole pipe and stabilization by drainage carry out following step:
(1) in a piece solid electrode stick 7 of center insertion for internal layer electrode tube 2, and acidic electrolysis is injected in inner layer electrode tube 2
Liquid, the copper wire connecting line 5 of outer electrode pipe 1 connect 6 anode of DC power supply, and solid electrode stick 7 connects the cathode of DC power supply 6,
DC power supply 6 is opened, the pollutant converged at around double-layer electric pole pipe and water transport are moved into the electrolyte in internal layer electrode pipe 2
In, the soil pollution object concentration outside internal layer electrode pipe 2 to be tested is lower than construction land soil pollution risk management and control standard, closes straight
The electrolyte in internal layer electrode pipe 2 is extracted in galvanic electricity source 6 out, extracts heavy metal using the method for chemistry；
(2) mud is injected in inner layer electrode tube 2, the copper wire connecting line 5 of outer electrode pipe 1 connects 6 cathode of DC power supply, solid
Electrode bar 7 connects the anode of DC power supply 6, opens DC power supply 6, will converge at the positively charged dirt around double-layer electric pole pipe
Dye object is migrated into the mud in internal layer electrode pipe 2, and the soil pollution object concentration outside internal layer electrode pipe 2 to be tested is used lower than construction
Soil pollution risk management and control standard in ground closes DC power supply 6, and the mud in internal layer electrode pipe 2 is extracted out, utilizes the method for chemistry
Extract heavy metal;
(3) exchange is connected to the copper wire connecting line 5 of outer electrode pipe 1 and the positive and negative anodes of solid electrode stick 7, inner layer electrode tube 2
Interior injection mud simultaneously opens DC power supply 6, and water transport is moved in internal layer electrode pipe 2 and extracted out.
Embodiment 4
The present embodiment is in order to clean by the pollutant removal near double-layer electric pole pipe and will carry out reinforcing in soil and carry out following steps
It is rapid:
The step in embodiment 2 and embodiment 3 is repeated, until completing the reparation and reinforcing to entire ultra-soft pollution soil site.
In the embodiment 3 for realizing the method for the present invention, injection is acid electric inside when internal layer electrode pipe 2 is as cathode electrode pipe
Liquid is solved, makes positively charged pollutant that is water-soluble or being adsorbed on soil particle and organic matter surface to movable cathode, anode table
The nominal price hydrogen ion that face generates, to break the associative key of pollutant and soil particle and organic matter, makes dirt also to movable cathode
Dye object migrates in the electric field to be concentrated in internal layer electrode pipe 2.Mud is injected inside when internal layer electrode pipe 2 is as anode, will be converged
In the mud in positively charged Contaminants Transport to internal layer electrode pipe 2 around the double-layer electric pole pipe；2 conduct of internal layer electrode pipe
Mud is injected when cathode inside, it will be in the internal layer electrode tube 2 of nominal price hydrogen ion migration.
Through the foregoing embodiment, the present invention using electro reclamation in situ and reinforcement technique by by other media, will be native
Pollutant and water transport in body move in medium, do not remove only the pollutant in the soil body, and improve the intensity of the soil body, drop
The low secondary pollution to ambient enviroment, has achieved the purpose that the harmless treatment and resource utilization to contaminated land, solves
The pollutant concentration of the neighbouring soil body of electrode is still higher after drainage by electroosmosis and electro reclamation, the water content of soil near cathode still compared with
Not the problem of height, soil stabilization and remediation efficiency do not reach requirement.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this
A little equivalents all belong to the scope of protection of the present invention.
Claims (10)
1. a kind of original position electro reclamation and the device for reinforcing ultra-soft Polluted Soil, it is characterised in that: double-layer electric pole pipe, the double-layer electric
Pole pipe include outer electrode pipe, parallel nested in outer layer electrode tube and non-touching internal layer electrode pipe and several one
End is fixed on inside outer electrode pipe and the other end is fixed on the insulating carriage outside internal layer electrode pipe, the outer electrode pipe
Aperture is covered with the pipe shaft of the internal layer electrode pipe and is coated with filter cloth.
2. a kind of electro reclamation in situ according to claim 1 and the device for reinforcing ultra-soft Polluted Soil, it is characterised in that: outer
Layer electrode tube and internal layer electrode pipe are all made of conductive plastic material, and insulating carriage uses PVC material.
3. a kind of electro reclamation in situ according to claim 1 and the device for reinforcing ultra-soft Polluted Soil, it is characterised in that: outer
It is enclosed with one copper wire connecting line in layer electrode tube and internal layer motor pipe, double-layer electric pole pipe both ends are equipped with dismountable pipe
Body bolted joint.
4. a kind of electro reclamation in situ according to claim 1 and the device for reinforcing ultra-soft Polluted Soil, it is characterised in that: institute
The internal diameter for stating outer electrode pipe is 100 ~ 300mm, and wall thickness is 0.5 ~ 2.5mm；The internal diameter of the internal layer electrode pipe is 50 ~ 100mm,
Wall thickness is 0.5 ~ 2.5mm.
5. a kind of electro reclamation in situ according to claim 1 and the device for reinforcing ultra-soft Polluted Soil, it is further characterized in that,
Including outer electrode pipe, internal layer electrode pipe and insulating supporting；The outer electrode pipe and internal layer electrode pipe are by conductive plastics system
At pipe shaft is covered with aperture, and filter cloth is wrapped up on surface, and internal layer electrode pipe is fixed on inside outer electrode pipe by insulating supporting, two pipes
Parallel nested is not in contact.
6. a kind of original position electro reclamation and the method for reinforcing ultra-soft Polluted Soil, it is characterised in that:
S1, soil sampling get the pollutant concentration in soil sample with X-ray fluorescence spectra technology measurement；
S2, the bottom of internal layer electrode pipe is sealed with cap, squeezes into several groups double-layer electric pole pipe in ultra-soft soil site, two is adjacent
Spacing is 1 ~ 2m and is in rectangle or quincuncial arrangement between double-layer electric pole pipe；
S3, the positive and negative anodes of the copper wire connecting line of the internal layer electrode pipe of each group double-layer electric pole pipe and DC power supply are connected, inner layer
Injection facilitates the chemistry such as the salting liquid of contaminant transportation, acid solution, chelating agent or surfactant in the soil body in electrode tube
Solution opens DC power supply；
S4, DC power supply is closed when soil pollution object concentration is 3~5 times of original test concentrations near electrode, by internal layer electricity
Solution extraction in pole pipe is gone out, and extracts heavy metal using the method for chemistry；
S5, piece solid electrode stick of center insertion in internal layer electrode tube, and acidic electrolysis bath is injected in inner layer electrode tube, outside
The copper wire connecting line of layer electrode tube connects DC power anode, and solid electrode stick connects the cathode of DC power supply, opens direct current
Source；
Soil pollution object concentration outside S6, internal layer electrode pipe to be tested is lower than construction land soil pollution risk management and control standard, closes
DC power supply is closed, the electrolyte in internal layer electrode pipe is extracted out, extracts heavy metal using the method for chemistry；
S7, it is inserted into a solid electrode stick in internal layer electrode tube center, injects mud in inner layer electrode tube, outer electrode pipe
Copper wire connecting line connects DC power cathode, and solid electrode stick connects the anode of DC power supply, opens DC power supply；
Soil pollution object concentration outside S8, internal layer electrode pipe to be tested is lower than construction land soil pollution risk management and control standard, closes
DC power supply is closed, the mud in internal layer electrode pipe is extracted out, extracts heavy metal using the method for chemistry；
S9, on the basis of S7 and S8, the copper wire connecting line of outer electrode pipe is connected to the anode of DC power supply, solid electrode
The cathode of stick connection DC power supply；
S10, step S3 ~ S9 is repeated, until completing the reparation and reinforcing to entire ultra-soft pollution soil site.
7. a kind of electro reclamation in situ as claimed in claim 6 and the method for reinforcing ultra-soft Polluted Soil, it is characterised in that: ultra-soft
The infiltration coefficient of Polluted Soil is 10- 6~10- 9cm/s。
8. a kind of electro reclamation in situ as claimed in claim 6 and the method for reinforcing ultra-soft Polluted Soil, it is characterised in that: injection
The solution for facilitating contaminant transportation in the soil body of internal layer electrode pipe selects CaCl2 Or NaCl salting liquid and small molecular organic acid
Solution, surfactant, chelating agent or the complexing agent of injection select beta-cyclodextrin or brij35.
9. a kind of electro reclamation in situ as claimed in claim 6 and the method for reinforcing ultra-soft Polluted Soil, it is characterised in that: injection
The electrolyte of internal layer electrode pipe selects citric acid or lactic acid solution, and the water content of the mud of injection should be not less than 150%.
10. a kind of original position electro reclamation and the method for reinforcing ultra-soft Polluted Soil, it is characterised in that:
S1, soil sampling application X-ray fluorescence spectra technology measure soil pollution concentration profile, squeeze into ultra-soft pollution soil site
Several groups double-layer electric pole pipe, reachs the last and seals the bottom of internal layer electrode pipe with cap, between two adjacent two-layer electrode tube hubs
Spacing be 1~2m, can be in rectangle or quincuncial arrangement, by the positive and negative of the internal layer electrode pipe of each double-layer electric pole pipe and DC power supply
Pole connection；
Injection facilitates the salting liquid of contaminant transportation, acid solution, chelating agent or surface in the soil body in S2, inner layer electrode tube
Activating agent chemical solution opens DC power supply, positively charged pollutant is made to flow to cathodic migration, negatively charged dirt with electric osmose
It contaminates object to migrate to anode direction, is 3~5 times of original test concentrations to soil pollution object concentration near electrode, close direct current
Source will extract heavy metal using the method for chemistry after the solution extraction in internal layer electrode pipe；
S3, further removal is gathered in the pollutant near double-layer electric pole pipe:
S31, the double-layer electric pole pipe for internal layer electrode pipe in step S2 as cathode, inner layer electrode tube is interior to inject acidic electrolysis
Liquid, and at its center be inserted into a solid electrode, by outer electrode pipe and solid electrode be separately connected DC power supply anode and
After energization, the pollutant converged at around double-layer electric pole pipe and water transport are moved in the electrolyte in internal layer electrode pipe for cathode, to
The soil pollution object concentration tested outside internal layer electrode pipe is lower than construction land soil pollution risk management and control standard, closes direct current
The electrolyte in internal layer electrode pipe is extracted in source out, extracts heavy metal using the method for chemistry；
S32, the double-layer electric pole pipe for internal layer electrode pipe in step S2 as anode, the interior injection mud of inner layer electrode tube, and
It is inserted into a solid electrode at its center, outer electrode pipe and solid electrode are separately connected to the cathode and anode of DC power supply,
After energization, it will converge in the mud in the positively charged Contaminants Transport to internal layer electrode pipe around double-layer electric pole pipe, to
The soil pollution object concentration tested outside internal layer electrode pipe is lower than construction land soil pollution risk management and control standard, closes direct current
The mud in internal layer electrode pipe is extracted in source out, extracts heavy metal using the method for chemistry, then using internal layer electrode pipe as cathode,
Outer electrode pipe is moved in internal layer electrode pipe and is extracted out as anode, by water transport；
S4, repeatable step S2 and S3, until completing the reparation and reinforcing to entire ultra-soft pollution soil site.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347506.2A CN110293125A (en) | 2019-04-28 | 2019-04-28 | It is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device and method |
| LU101743A LU101743B1 (en) | 2019-04-28 | 2020-02-06 | Device and Method for In-situ Electro-kinetic Remediation and Consolidation of Contaminated Ultra-soft Soil |
| PCT/CN2020/074455 WO2020147862A1 (en) | 2019-04-28 | 2020-02-06 | Method and apparatus for in-situ electro-remediation and reinforcement of super-soft contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347506.2A CN110293125A (en) | 2019-04-28 | 2019-04-28 | It is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device and method |
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| CN110293125A true CN110293125A (en) | 2019-10-01 |
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| CN201910347506.2A Pending CN110293125A (en) | 2019-04-28 | 2019-04-28 | It is a kind of original position electro reclamation and reinforce ultra-soft Polluted Soil device and method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110293125A (en) |
| LU (1) | LU101743B1 (en) |
| WO (1) | WO2020147862A1 (en) |
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| WO2020147862A1 (en) * | 2019-04-28 | 2020-07-23 | 南通大学 | Method and apparatus for in-situ electro-remediation and reinforcement of super-soft contaminated soil |
| CN113000592A (en) * | 2021-02-20 | 2021-06-22 | 江南大学 | Method for electrically repairing heavy metal copper polluted soil |
| CN113123322A (en) * | 2021-04-12 | 2021-07-16 | 宁波大学 | Construction method of vertical electroosmosis pile system |
| CN113275376A (en) * | 2021-06-24 | 2021-08-20 | 南通大学 | Device and method for repairing polluted soft clay |
| CN115365288A (en) * | 2022-09-02 | 2022-11-22 | 中南大学 | Electric repair device and repair method for heavy metal contaminated soil by combining low-temperature driving |
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| CN114192567B (en) * | 2021-12-08 | 2022-12-23 | 江苏澳洋环境科技有限公司 | Process for improving acidified polluted soil |
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Also Published As
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| LU101743A1 (en) | 2020-10-28 |
| LU101743B1 (en) | 2020-11-27 |
| WO2020147862A1 (en) | 2020-07-23 |
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