CN106111688A - A kind of method of surfactant strengthening electromotion repairing technique PAHs contaminated soil - Google Patents
A kind of method of surfactant strengthening electromotion repairing technique PAHs contaminated soil Download PDFInfo
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- CN106111688A CN106111688A CN201610465593.8A CN201610465593A CN106111688A CN 106111688 A CN106111688 A CN 106111688A CN 201610465593 A CN201610465593 A CN 201610465593A CN 106111688 A CN106111688 A CN 106111688A
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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
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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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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- General Health & Medical Sciences (AREA)
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Abstract
The method that the present invention relates to a kind of surfactant strengthening electromotion repairing technique PAHs contaminated soil, it is characterized in that it includes: build builder's temporary shed in PAHs contaminated soil (11) top to be repaired, the loose PAHs contaminated soil (11) to be repaired of machinery；Soil surface after loose is 10～100L/m with fountain height2Spray surfactant solution；It is provided with anode chamber (13) and cathode chamber (9) in PAHs contaminated soil (11) lateral symmetry to be repaired, anode buffer liquid circulates between anode chamber (13) and anode buffer pond (2), and Cathode buffer circulates between cathode chamber (9) and negative electrode Buffer Pool (5)；The voltage gradient of constant-voltage DC source (3) is 0.1～1V/cm；At the 1st circulated～3d, disposably to every square metre of PAHs contaminated soil (11) surface sprinkling laccase solution 10～100L to be repaired.The present invention has that repair system is simple, in-situ immobilization and the feature of green safety；Migration and the degraded of pollutant in PAHs contaminated soil can be realized simultaneously.
Description
Technical field
The invention belongs to the recovery technique field of contaminated soil.It is specifically related to a kind of surfactant strengthening electrodynamics repair
The method of multiple PAHs contaminated soil.
Background technology
Polycyclic aromatic hydrocarbon (Polycyclic Aromatic Hydrocarbons, PAHs) typically refers to containing two rings or two rings
The above fused ring compound arranged with wire, horn shape or tufted, belongs to hydrophobic organic pollutant, and PAHs has the strongest
Carcinogenic, mutagenesis and the characteristic of teratogenecity, be a class maximum in environmental carcinogenesis chemical substance, growth of microorganism had high inhibition
Effect.PAHs is difficult to be utilized by microorganism because of its stable circulus, is widely present in human ecological environment.Coke-oven plant,
Steel plant and gasworks etc. can give off a large amount of PAHs in process of production, by atmosphere dried wet deposition etc., cause Soil Surrounding
PAHs content is considerably beyond environmental safety standard.Additionally, in urbanization process, a large amount of contaminating enterprises move outside, stay many high
Risk industrial pollution place is urgently repaired, including PAHs contaminated soil.
Laccase (Laccase) is the polyphenol oxidase (p-diphenol oxidase EC.1.10.3.2) of a kind of cupric,
The whiterot fungi of Basidiomycetes is the prime producer of laccase, and laccase has 780mV oxidation-reduction potential, can molecular oxygen directly also
Originally it was water, there is no H2O2In the presence of other secondary metabolite, the many organic pollutions of oxidation can be catalyzed, just because of paint
The enzyme wide spectrum characteristic to degradation of substrates, laccase be studied for the degraded of PAHs compound in environment, chlorophenols insecticide and
The degraded etc. of pesticide soil pollutant, has preferable treatment effect.Although organic contamination reparation is presented good by laccase
Prospect, can yet suffer from many limiting factors and problem.First the laccase that dissociates is easy by environmental influence in mechanism
Deactivation, limits its industrial applications scope to a certain extent；Secondly laccase under the conditions of soil media with pollutant
Between mass-transfer efficiency low, directly affect catalytic degradation efficiency [PV.Iyer, the L.Ananthanarayan.Enzyme of laccase
stability and stabilization-aqueous and non-aqueous environment[J].Process
Biochemistry, 2008,43:1019-1032.], limit laccase application in soil organic contamination is repaired.
Electrodynamics (Electrokinetics, EK) recovery technique is a kind of new and effective removal soil and groundwater
The recovery technique of middle pollutant.The ultimate principle of EK recovery technique is by applying faint DC electric field, utilizing this electric field to produce
Various electro kinetic effects pollutant displacement is separated to specifying in region.Its repair mechanism mainly wraps
Include electromigration, electrodialysis and electrophoresis.The method has been used in the improvement of organic pollution at present, and effect is obvious, and has
Good prospect of the application (LagemanR.Electroreclamation applications in the Netherlands
[J] .Environsci.Echnol, 1993,27 (13): 2648-2650).Imitate though EK recovery technique can improve organic process
Really, but may only as strengthening and migrating technology, it is impossible to realize pollutant conversion remove.
Surfactant refers to add the material of the interface state generation significant change that can make its solution system on a small quantity.Have
Fixing hydrophilic and oleophilic group, can align on the surface of solution.Add in EK repairs the repair process of PAHs contaminated soil
Enter surfactant can be eluted in the soil liquid by the PAHs in soil, enhance the effect that PAHs dissolves, thus improve
EK repairs the transport efficiency of PAHs contaminated soil.But in EK repairs the repair process of PAHs contaminated soil, add surface activity
Though agent can improve the transport efficiency of PAHs, but cannot realize the conversion degraded of PAHs.
Summary of the invention
It is contemplated that overcome above-mentioned technological deficiency, it is therefore an objective to provide that a kind of repair system is simple, in-situ immobilization and green
The restorative procedure of the PAHs contaminated soil of safety；The method can be effectively improved the migration degradation efficiency of pollutant in soil.
For achieving the above object, the present invention adopts the technical scheme that, a kind of surfactant strengthening electromotion repairing technique
The method of PAHs contaminated soil, it is characterised in that it includes:
1) preparation before PAHs contaminated soil remediation:
Builder's temporary shed is built, the loose PAHs contaminated soil to be repaired of machinery in PAHs contaminated soil (11) top to be repaired.
Soil surface after loose sprays surfactant solution, and surfactant solution fountain height is 10～100L/m2；
2) repair system of PAHs contaminated soil:
It is provided with anode chamber (13) and cathode chamber (9) in PAHs contaminated soil (11) lateral symmetry to be repaired, to be repaired
PAHs contaminated soil (11): anode chamber (13): the volume ratio of cathode chamber (9) is (10～100): 1: 1；Anode chamber (13) with treat
Being provided with anode interlayer (12) between the contact surface of the PAHs contaminated soil (11) repaired, cathode chamber (9) pollutes with PAHs to be repaired
It is provided with negative electrode interlayer (10), described anode chamber (13) and described cathode chamber (9) between the contact surface of soil (11) to remove and corresponding sun
Outside the face that pole interlayer (12) contacts with negative electrode interlayer (10), remaining contact surface is antiseepage face；
Anode graphite electrode (14) is placed in anode chamber (13), and negative electrode graphite electrode (8) is placed in cathode chamber (9)；Anode
Buffer Pool (2) and anode chamber (13) are loaded with in anode buffer liquid, negative electrode Buffer Pool (5) and cathode chamber (9) and are loaded with negative electrode
Buffer, anode chamber (13) are connected with anode buffer pond (2) circulation with the second constant flow pump (15) by the first constant flow pump (1), cloudy
Room, pole (9) is connected with negative electrode Buffer Pool (5) circulation with the 4th constant flow pump (7) by the 3rd constant flow pump (6)；Anode graphite electrode
(14) positive pole with constant-voltage DC source (3) is connected, and negative electrode graphite electrode (8) is by circuit tester (4) and constant-voltage DC source (3)
Negative pole connect, it is 0.1～1V/ that constant-voltage DC source (3) is applied to the voltage gradient of PAHs contaminated soil (11) to be repaired
cm；
3) reparation of PAHs contaminated soil:
Starting the first constant flow pump (1) and the second constant flow pump (15), anode buffer liquid is in anode buffer pond (2) and anode chamber
(13) circulating between, start the 3rd constant flow pump (6) and the 4th constant flow pump (7) simultaneously, Cathode buffer is in negative electrode Buffer Pool (5)
And circulate between cathode chamber (9), anode buffer liquid circular flow hourly with Cathode buffer is identical, and anode buffer liquid is every
Hour 0.5～5 times that circular flow is anode chamber (13) volume, the time of circulating is 15～30d；Circulated
1～3d, disposably to PAHs contaminated soil (11) surface sprinkling laccase solution to be repaired, fountain height is 10～100L/m2。
Further, described surfactant is rhanolipid as biosurfactant, non-ionic surfactant Tween 80
With the one in triton x-100, surfactant is dissolved in water and prepares surfactant solution, and concentration is 0.1～10g/L.
Further, described laccase solution is produced by fungus solution or the solution for the preparation of finished product reagent place；Laccase solution
Enzyme work be 0.1～4U/mL.
Further, described anode buffer liquid is sodium acetate solution, and concentration is 0.1～1.0mol/L；Described Cathode buffer
For acetic acid solution, concentration is 0.1～1.0mol/L.
Further, described anode interlayer (12) and described negative electrode interlayer (10) are formed by two-layer filter screen and two layers of filter paper,
Two layers of filter paper folder is positioned between two-layer filter screen.
Owing to using technique scheme, present invention advantage compared with prior art is:
The present invention adds surfactant at EK in laccase combination repair process, breaches single EK recovery technique
Limitation, enhances dissolubility and the transport efficiency of PAHs in PAHs contaminated soil, improves the degradation rate of PAHs in soil.Surface
Activating agent can reduce surface tension owing to having, and strengthens the effect that organic pollution dissolves, can improve the stream of organic pollution
Dynamic property and bioavailability.In EK with the repair process of laccase combination recovery technique, add surfactant can strengthen multiple
The dissolubility of miscellaneous organic pollution and the electrodynamic transport efficiency of raising, improve the organic degradation rate of slightly solubility in soil.
On the other hand, surfactant can improve the catalysis activity of laccase, promotes the laccase Degradation to PAHs.The degraded of laccase is made
Improved by the hydrophobicity that can make PAHs pollutant, accelerated the migration in soil of the PAHs pollutant；And the pair of laccase
Product is water, non-secondary pollution.
The repair system of the present invention is that the position according to PAHs contaminated soil to be repaired arranges anode chamber, cathode chamber, sun
Pole Buffer Pool, negative electrode Buffer Pool, electrode and constant-voltage DC source, simple in construction, easily operated；And need not excavation, move
Soil, processes PAHs pollutant by being applied to the electric field of PAHs contaminated soil, to realize in-situ immobilization.
Therefore, the present invention have repair system simple in construction, easily operated, the spy of in-situ immobilization and green safety can be carried out
Point；The present invention can realize migration and the degraded of pollutant in PAHs contaminated soil simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of PAHs contaminated soil remediation system adopting recirculating in the present invention.
Detailed description of the invention
With detailed description of the invention, the inventive method is further described below in conjunction with the accompanying drawings, not to its protection domain
Restriction: in this detailed description of the invention: described anode interlayer (12) and described negative electrode interlayer (10) are by two-layer filter screen and two-layer
Filter paper forms, and two layers of filter paper folder is positioned between two-layer filter screen.Embodiment repeats no more.
Embodiment 1
A kind of surfactant strengthening electromotion repairing technique PAHs contaminated soil method, the method described in the present embodiment its
It is characterised by that it includes:
1) preparation before PAHs contaminated soil remediation:
Builder's temporary shed is built, the loose PAHs contaminated soil to be repaired of machinery in PAHs contaminated soil (11) top to be repaired.
Soil surface after loose sprays surfactant solution, and surfactant solution fountain height is 10～80L/m2；
2) repair system of PAHs contaminated soil:
The structural representation of PAHs contaminated soil remediation system adopting recirculating is as it is shown in figure 1, at PAHs contaminated soil (11) to be repaired
Lateral symmetry it is provided with anode chamber (13) and cathode chamber (9), PAHs contaminated soil (11) to be repaired: anode chamber (13): negative electrode
The volume ratio of room (9) is (10～100): 1: 1；Set between the contact surface of anode chamber (13) and PAHs contaminated soil (11) to be repaired
There is anode interlayer (12), between the contact surface of cathode chamber (9) and PAHs contaminated soil (11) to be repaired, be provided with negative electrode interlayer (10),
Described anode chamber (13) and described cathode chamber (9) in addition to the face contacted with corresponding anode interlayer (12) and negative electrode interlayer (10) its
Remaining contact surface is antiseepage face；
Anode graphite electrode (14) is placed in anode chamber (13), and negative electrode graphite electrode (8) is placed in cathode chamber (9)；Anode
Buffer Pool (2) and anode chamber (13) are loaded with in anode buffer liquid, negative electrode Buffer Pool (5) and cathode chamber (9) and are loaded with negative electrode
Buffer, anode chamber (13) are connected with anode buffer pond (2) circulation with the second constant flow pump (15) by the first constant flow pump (1), cloudy
Room, pole (9) is connected with negative electrode Buffer Pool (5) circulation with the 4th constant flow pump (7) by the 3rd constant flow pump (6)；Anode graphite electrode
(14) positive pole with constant-voltage DC source (3) is connected, and negative electrode graphite electrode (8) is by circuit tester (4) and constant-voltage DC source (3)
Negative pole connect, constant-voltage DC source (3) be applied to the voltage gradient of PAHs contaminated soil (11) to be repaired be 0.1～
0.5V/cm；
3) reparation of PAHs contaminated soil:
Starting the first constant flow pump (1) and the second constant flow pump (15), anode buffer liquid is in anode buffer pond (2) and anode chamber
(13) circulating between, start the 3rd constant flow pump (6) and the 4th constant flow pump (7) simultaneously, Cathode buffer is in negative electrode Buffer Pool (5)
And circulate between cathode chamber (9), anode buffer liquid circular flow hourly with Cathode buffer is identical, and anode buffer liquid is every
Hour 0.5～3 times that circular flow is anode chamber (13) volume, the time of circulating is 15～20d；Circulated
1～3d, disposably to PAHs contaminated soil (11) surface sprinkling laccase solution to be repaired, fountain height is 10～80L/m2。
Further, described surfactant is rhanolipid as biosurfactant, and surfactant is dissolved in water and prepares table
Face activator solution, concentration is 0.1～1g/L.
Further, the solution that described laccase solution is produced by fungus；The enzyme work of laccase solution is 0.1～2U/mL.
Further, described anode buffer liquid is sodium acetate solution, and concentration is 0.1～0.8mol/L；Described Cathode buffer
For acetic acid solution, concentration is 0.1～0.8mol/L.
Embodiment 2
A kind of method of surfactant strengthening electromotion repairing technique PAHs contaminated soil.Method described in the present embodiment its
It is characterised by that it includes:
1) preparation before PAHs contaminated soil remediation:
Builder's temporary shed is built, the loose PAHs contaminated soil to be repaired of machinery in PAHs contaminated soil (11) top to be repaired.
Soil surface after loose sprays surfactant solution, and surfactant solution fountain height is 20～90L/m2；
2) repair system of PAHs contaminated soil:
The structural representation of PAHs contaminated soil remediation system adopting recirculating is as it is shown in figure 1, at PAHs contaminated soil (11) to be repaired
Lateral symmetry it is provided with anode chamber (13) and cathode chamber (9), PAHs contaminated soil (11) to be repaired: anode chamber (13): negative electrode
The volume ratio of room (9) is (20～90): 1: 1；Set between the contact surface of anode chamber (13) and PAHs contaminated soil (11) to be repaired
There is anode interlayer (12), between the contact surface of cathode chamber (9) and PAHs contaminated soil (11) to be repaired, be provided with negative electrode interlayer (10),
Described anode chamber (13) and described cathode chamber (9) in addition to the face contacted with corresponding anode interlayer (12) and negative electrode interlayer (10) its
Remaining contact surface is antiseepage face；
Anode graphite electrode (14) is placed in anode chamber (13), and negative electrode graphite electrode (8) is placed in cathode chamber (9)；Anode
Buffer Pool (2) and anode chamber (13) are loaded with in anode buffer liquid, negative electrode Buffer Pool (5) and cathode chamber (9) and are loaded with negative electrode
Buffer, anode chamber (13) are connected with anode buffer pond (2) circulation with the second constant flow pump (15) by the first constant flow pump (1), cloudy
Room, pole (9) is connected with negative electrode Buffer Pool (5) circulation with the 4th constant flow pump (7) by the 3rd constant flow pump (6)；Anode graphite electrode
(14) positive pole with constant-voltage DC source (3) is connected, and negative electrode graphite electrode (8) is by circuit tester (4) and constant-voltage DC source (3)
Negative pole connect, constant-voltage DC source (3) be applied to the voltage gradient of PAHs contaminated soil (11) to be repaired be 0.3～
0.8V/cm；
3) reparation of PAHs contaminated soil:
Starting the first constant flow pump (1) and the second constant flow pump (15), anode buffer liquid is in anode buffer pond (2) and anode chamber
(13) circulating between, start the 3rd constant flow pump (6) and the 4th constant flow pump (7) simultaneously, Cathode buffer is in negative electrode Buffer Pool (5)
And circulate between cathode chamber (9), anode buffer liquid circular flow hourly with Cathode buffer is identical, and anode buffer liquid is every
Hour 1～4 times that circular flow is anode chamber (13) volume, the time of circulating is 20～25d；In the 1st circulated
～3d, disposably to PAHs contaminated soil (11) surface sprinkling laccase solution to be repaired, fountain height is 20～90L/m2。
Further, described surfactant is non-ionic surfactant Tween 80, and surfactant is dissolved in water and prepares table
Face activator solution, concentration is 0.5～5g/L.
Further, described laccase solution is the solution of finished product reagent place preparation；The enzyme work of laccase solution is 0.5～2U/mL.
Further, described anode buffer liquid is sodium acetate solution, and concentration is 0.2～0.9mol/L；Described Cathode buffer
For acetic acid solution, concentration is 0.2～0.9mol/L.
Embodiment 3
A kind of method of surfactant strengthening electromotion repairing technique PAHs contaminated soil.Method described in the present embodiment its
It is characterised by that it includes:
1) preparation before PAHs contaminated soil remediation:
Builder's temporary shed is built, the loose PAHs contaminated soil to be repaired of machinery in PAHs contaminated soil (11) top to be repaired.
Soil surface after loose sprays surfactant solution, and surfactant solution fountain height is 30～100L/m2；
2) repair system of PAHs contaminated soil:
The structural representation of PAHs contaminated soil remediation system adopting recirculating is as it is shown in figure 1, at PAHs contaminated soil (11) to be repaired
Lateral symmetry it is provided with anode chamber (13) and cathode chamber (9), PAHs contaminated soil (11) to be repaired: anode chamber (13): negative electrode
The volume ratio of room (9) is (30～100): 1: 1；Set between the contact surface of anode chamber (13) and PAHs contaminated soil (11) to be repaired
There is anode interlayer (12), between the contact surface of cathode chamber (9) and PAHs contaminated soil (11) to be repaired, be provided with negative electrode interlayer (10),
Described anode chamber (13) and described cathode chamber (9) in addition to the face contacted with corresponding anode interlayer (12) and negative electrode interlayer (10) its
Remaining contact surface is antiseepage face；
Anode graphite electrode (14) is placed in anode chamber (13), and negative electrode graphite electrode (8) is placed in cathode chamber (9)；Anode
Buffer Pool (2) and anode chamber (13) are loaded with in anode buffer liquid, negative electrode Buffer Pool (5) and cathode chamber (9) and are loaded with negative electrode
Buffer, anode chamber (13) are connected with anode buffer pond (2) circulation with the second constant flow pump (15) by the first constant flow pump (1), cloudy
Room, pole (9) is connected with negative electrode Buffer Pool (5) circulation with the 4th constant flow pump (7) by the 3rd constant flow pump (6)；Anode graphite electrode
(14) positive pole with constant-voltage DC source (3) is connected, and negative electrode graphite electrode (8) is by circuit tester (4) and constant-voltage DC source (3)
Negative pole connect, it is 0.5～1V/ that constant-voltage DC source (3) is applied to the voltage gradient of PAHs contaminated soil (11) to be repaired
cm；
3) reparation of PAHs contaminated soil:
Starting the first constant flow pump (1) and the second constant flow pump (15), anode buffer liquid is in anode buffer pond (2) and anode chamber
(13) circulating between, start the 3rd constant flow pump (6) and the 4th constant flow pump (7) simultaneously, Cathode buffer is in negative electrode Buffer Pool (5)
And circulate between cathode chamber (9), anode buffer liquid circular flow hourly with Cathode buffer is identical, and anode buffer liquid is every
Hour 2～5 times that circular flow is anode chamber (13) volume, the time of circulating is 25～30d；In the 1st circulated
～3d, disposably to PAHs contaminated soil (11) surface sprinkling laccase solution to be repaired, fountain height is 30～100L/m2。
Further, described surfactant is nonionic surfactant triton x-100, and surfactant is dissolved in water system
Obtaining surfactant solution, concentration is 1～10g/L.
Further, the solution that described laccase solution is produced by fungus；The enzyme work of laccase solution is 0.4～4U/mL.
Further, described anode buffer liquid is sodium acetate solution, and concentration is 0.3～1.0mol/L；Described Cathode buffer
For acetic acid solution, concentration is 0.3～1.0mol/L.
This detailed description of the invention advantage compared with prior art is:
The present invention adds surfactant at EK in laccase combination repair process, breaches single EK recovery technique
Limitation, enhances dissolubility and the transport efficiency of PAHs in PAHs contaminated soil, improves the degradation rate of PAHs in soil.Surface
Activating agent can reduce surface tension owing to having, and strengthens the effect that organic pollution dissolves, can improve the stream of organic pollution
Dynamic property and bioavailability.In EK with the repair process of laccase combination recovery technique, add surfactant can strengthen multiple
The dissolubility of miscellaneous organic pollution and the electrodynamic transport efficiency of raising, improve the organic degradation rate of slightly solubility in soil.
On the other hand, surfactant can improve the catalysis activity of laccase, promotes the laccase Degradation to PAHs.The degraded of laccase is made
Improved by the hydrophobicity that can make PAHs pollutant, accelerated the migration in soil of the PAHs pollutant；And the pair of laccase
Product is water, non-secondary pollution.
The repair system of the present invention is that the position according to PAHs contaminated soil to be repaired arranges anode chamber, cathode chamber, sun
Pole Buffer Pool, negative electrode Buffer Pool, electrode and constant-voltage DC source, simple in construction, easily operated；And need not excavation, move
Soil, processes PAHs pollutant by being applied to the electric field of PAHs contaminated soil, to realize in-situ immobilization.
Therefore, the present invention have repair system simple in construction, easily operated, the spy of in-situ immobilization and green safety can be carried out
Point；The present invention can realize migration and the degraded of pollutant in PAHs contaminated soil simultaneously.
Claims (5)
1. the method for a surfactant strengthening electromotion repairing technique PAHs contaminated soil, it is characterised in that it includes:
1) preparation before PAHs contaminated soil remediation:
Builder's temporary shed is built, the loose PAHs contaminated soil (11) to be repaired of machinery in PAHs contaminated soil (11) top to be repaired；
Soil surface after loose sprays surfactant solution, and surfactant solution fountain height is 10～100L/m2；
2) repair system of PAHs contaminated soil:
It is provided with anode chamber (13) and cathode chamber (9) in PAHs contaminated soil (11) lateral symmetry to be repaired, to be repaired
PAHs contaminated soil (11): anode chamber (13): the volume ratio of cathode chamber (9) is (10～100): 1: 1；Anode chamber (13) is with to be repaired
Anode interlayer (12), cathode chamber (9) and PAHs Polluted Soil to be repaired it is provided with between the contact surface of multiple PAHs contaminated soil (11)
It is provided with negative electrode interlayer (10), described anode chamber (13) and described cathode chamber (9) between the contact surface of earth (11) to remove and corresponding anode
Outside the face that interlayer (12) contacts with negative electrode interlayer (10), remaining contact surface is antiseepage face；
Anode graphite electrode (14) is placed in anode chamber (13), and negative electrode graphite electrode (8) is placed in cathode chamber (9)；Anode buffer
Pond (2) and anode chamber (13) are loaded with in anode buffer liquid, negative electrode Buffer Pool (5) and cathode chamber (9) and are loaded with negative electrode buffering
Liquid, anode chamber (13) are connected with anode buffer pond (2) circulation with the second constant flow pump (15) by the first constant flow pump (1), cathode chamber
(9) connected with negative electrode Buffer Pool (5) circulation with the 4th constant flow pump (7) by the 3rd constant flow pump (6)；Anode graphite electrode (14) with
The positive pole of constant-voltage DC source (3) connects, and negative electrode graphite electrode (8) is by the negative pole of circuit tester (4) with constant-voltage DC source (3)
Connecting, it is 0.1～1V/cm that constant-voltage DC source (3) is applied to the voltage gradient of PAHs contaminated soil (11) to be repaired；
3) reparation of PAHs contaminated soil:
Starting the first constant flow pump (1) and the second constant flow pump (15), anode buffer liquid is between anode buffer pond (2) and anode chamber (13)
Circulating, start the 3rd constant flow pump (6) and the 4th constant flow pump (7) simultaneously, Cathode buffer is at negative electrode Buffer Pool (5) and negative electrode
Room circulates between (9), and anode buffer liquid circular flow hourly with Cathode buffer is identical, and anode buffer liquid is hourly
Circular flow is 0.5～5 times of anode chamber (13) volume, and the time of circulating is 15～30d；At the 1st circulated～3d,
Disposable to PAHs contaminated soil (11) surface sprinkling laccase solution to be repaired, fountain height is 10～100L/m2。
The method of a kind of surfactant the most according to claim 1 strengthening electromotion repairing technique PAHs contaminated soil, its
It is characterised by that described surfactant is rhanolipid as biosurfactant, non-ionic surfactant Tween 80 and TritonX
One in X-100, surfactant is dissolved in water and prepares surfactant solution, and concentration is 0.1～10g/L.
The method of a kind of surfactant the most according to claim 1 strengthening electromotion repairing technique PAHs contaminated soil, its
It is characterised by the solution that described laccase solution is produced by fungus or the solution prepared for finished product reagent place；The enzyme work of laccase solution is
0.1～4U/mL.
The method of a kind of surfactant the most according to claim 1 strengthening electromotion repairing technique PAHs contaminated soil, its
Being characterised by that described anode buffer liquid is sodium acetate solution, concentration is 0.1～1.0mol/L；Described Cathode buffer is that acetic acid is molten
Liquid, concentration is 0.1～1.0mol/L.
The method of a kind of surfactant the most according to claim 1 strengthening electromotion repairing technique PAHs contaminated soil, its
It is characterised by that described anode interlayer (12) and described negative electrode interlayer (10) are formed by two-layer filter screen and two layers of filter paper, two layers of filter paper
Folder is positioned between two-layer filter screen.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110814018A (en) * | 2018-08-09 | 2020-02-21 | 西南大学 | Soil remediation method based on oyster mushroom and phanerochaete chrysosporium |
| CN111250527A (en) * | 2020-01-15 | 2020-06-09 | 中国科学院南京土壤研究所 | Method for removing persistent organic pollutants in soil through Triton X-100 enhanced advanced oxidation in cooperation with electrokinetic remediation |
| CN113000584A (en) * | 2021-04-28 | 2021-06-22 | 生态环境部南京环境科学研究所 | Device and method for reducing odor substances in soil through combination of electric remediation and chemical oxidation |
| CN114378111A (en) * | 2021-11-30 | 2022-04-22 | 西安建筑科技大学 | Device and method for removing loess heavy metal pollution based on electrodynamics and mineralogy |
| CN115672968A (en) * | 2022-11-11 | 2023-02-03 | 常州大学 | Method for ultrasonically-enhanced electrically-remediating phenanthrene-contaminated soil |
| CN115672967A (en) * | 2022-11-10 | 2023-02-03 | 常州大学 | Method for strengthening electrokinetic remediation of phenanthrene contaminated soil by combining surfactant and oxidant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555015A (en) * | 2018-05-09 | 2018-09-21 | 河北工业大学 | A kind of electric repair method in situ and equipment of portable contaminated soil |
| CN110814018A (en) * | 2018-08-09 | 2020-02-21 | 西南大学 | Soil remediation method based on oyster mushroom and phanerochaete chrysosporium |
| CN111250527A (en) * | 2020-01-15 | 2020-06-09 | 中国科学院南京土壤研究所 | Method for removing persistent organic pollutants in soil through Triton X-100 enhanced advanced oxidation in cooperation with electrokinetic remediation |
| CN111250527B (en) * | 2020-01-15 | 2021-09-14 | 中国科学院南京土壤研究所 | Method for removing persistent organic pollutants in soil through Triton X-100 enhanced advanced oxidation in cooperation with electrokinetic remediation |
| CN113000584A (en) * | 2021-04-28 | 2021-06-22 | 生态环境部南京环境科学研究所 | Device and method for reducing odor substances in soil through combination of electric remediation and chemical oxidation |
| CN113000584B (en) * | 2021-04-28 | 2021-11-23 | 生态环境部南京环境科学研究所 | Device and method for reducing odor substances in soil through combination of electric remediation and chemical oxidation |
| CN114378111A (en) * | 2021-11-30 | 2022-04-22 | 西安建筑科技大学 | Device and method for removing loess heavy metal pollution based on electrodynamics and mineralogy |
| CN115672967A (en) * | 2022-11-10 | 2023-02-03 | 常州大学 | Method for strengthening electrokinetic remediation of phenanthrene contaminated soil by combining surfactant and oxidant |
| CN115672968A (en) * | 2022-11-11 | 2023-02-03 | 常州大学 | Method for ultrasonically-enhanced electrically-remediating phenanthrene-contaminated soil |
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Application publication date: 20161116 |