CN108213070A - A kind of original position is electronic-device and method of electrochemistry collaboration repairing polluted soil and underground water - Google Patents
A kind of original position is electronic-device and method of electrochemistry collaboration repairing polluted soil and underground water Download PDFInfo
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- CN108213070A CN108213070A CN201810023035.5A CN201810023035A CN108213070A CN 108213070 A CN108213070 A CN 108213070A CN 201810023035 A CN201810023035 A CN 201810023035A CN 108213070 A CN108213070 A CN 108213070A
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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
- B09C1/002—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
- B09C2101/00—In situ
Abstract
The present invention relates to the device and method of a kind of electronic electrochemistry collaboration repairing polluted soil in original position and underground water, the present invention is by building the monometallic or bimetallic electrode with Nanosurface of deoxidization, degradation organic pollution, or there is the air cathode of advanced oxidation pollutant, and using the electrode of structure as cathode in electro reclamation device of the present invention, by applying DC electric field in the medium, organic pollution in medium is migrated to cathode, electric field driven contaminant transportation is realized and is cooperateed with what electrode electro Chemical in situ was degraded.Electric repair method of the present invention avoids during traditional electro reclamation the complex engineering problems such as after-treatment and additional addition reductant-oxidant, setting PRB after catholyte extracting, the quantities and rehabilitation cost of electro reclamation can be significantly reduced, so as to provide a kind of in-situ remediation method for preparing contaminated soil that is easy, of low cost, efficiently cooperateing with and underground water.
Description
Technical field
The invention belongs to soil and groudwater remediation technical fields, special suitable for contaminated soil and underground water in-situ immobilization
Be not related to a kind of original position it is electronic-electrochemistry collaboration repairing polluted soil and underground water device and method.
Background technology
In soil and groundwater pollution surveys, organic pollution frequently detects for countries in the world, serious threat resident's body
Health and safe drinking water.And during the groundwater remediation carried out in succession, often there is pollutant reparation and be not thorough and concentration
The phenomenon that rebounding again is primarily limited to the reversed diffusion of low permeability formation substance composition, structure feature and the formation contaminant object.
Due to the limitation of the stratum hydraulics, traditional groundwater remediation technology such as pump-and-treat system, chemical remediation etc. cause pollutant
Extraction is difficult, and chemical agent can not be efficiently injected into, and cause repairing effect bad, repairing efficiency is long.
Electric repairing technique is a kind of effective method for repairing low osmotic medium contaminated soil and underground water, by medium
Middle application DC electric field causes the electromigration of charged ion, the electrophoresis of charged colloidal particle, especially strengthens pore water to cathodic migration
Electrodialysis stream effectively drives the migration of organic pollution in low permeability media.Traditional electric repairing technique, which is used alone, to incite somebody to action
Organic pollution is degraded, and often combines after-treatment, additional injection after other engineering reclamation activities such as catholyte extraction
Reductant-oxidant or the electronics utilized for microbial degradation pollutant supply receptor, PRB etc., quantities are set between the two poles of the earth
Greatly, rehabilitation cost is high.Electrochemical in-situ technology can efficiently use electrode electro Chemical reaction, pollutant is direct or indirect
Removal, reaction is efficiently quick, especially to the electrochemical reduction degradation of organic pollution, has higher selectivity.
At present, electric repairing technique is concentrated mainly on the coupling technique with other recovery techniques, and to dirty in faradaic reaction
The synergistic effect report for contaminating the degradation of object electrode electro Chemical is less.106140809 A of patent document CN disclose a kind of using compound
The device and method of electrode repairing polluted soil and underground water pass through graphite electrode, persulfate slow-release material, hydrogen-based swelling
The combination electrode that soil, activated carbon and kaolin are formed during electro reclamation, combines electro reclamation and advanced oxygen in situ
Change technology will migrate heavy metal and organic pollution to cathode, by activating persulfate, generate the sulfuric acid of strong oxidizing property
Root free radical, and then oxidative degradation organic pollution.106378357 A of patent document CN disclose a kind of for heavy metal-polluted
Contaminate combination electrode, electro reclamation device and the electric repair method of soil electro reclamation, the netted package being made of conducting medium
Modified meerschaum and modification of chitosan, construct combination electrode, the huge sum of money to arrive using electric greatly specific surface area absorption migration
Belong to ion, realize the removal in situ of heavy metal contaminants, after the completion of avoiding electro reclamation, follow-up pump-and-treat system catholyte.
Physically or chemically reacting between electrode material and pollutant in electro reclamation is effectively utilized in both the above method, but electric
Pole material needs to constantly change, and operating process is cumbersome, and rehabilitation cost is high, does not efficiently use the electrochemical reaction of electrode.
Invention content
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of original position it is electronic-electrochemistry association
With the device and method of repairing polluted soil and underground water, pass through easy electricity of the electro-deposition techniques structure with Nanosurface
Pole improves the electrochemical reaction catalytic activity of electrode, and the electrode of structure is used in electric restoring polluted soil and underground water,
Electric field-enhanced driving organic pollution migration and effective collaboration of electrochemical cathode ira situ degradation are realized, it is electronic to avoid tradition
Catholyte extraction after-treatment, the additionally cumbersome engineering such as frequent replacement of injection reductant-oxidant, combination electrode in repair process
Measure shortens repairing efficiency while operating process is simplified, reduces rehabilitation cost, improves remediation efficiency.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of original position is electronic-device of electrochemistry collaboration repairing polluted soil and underground water, including electro reclamation device,
It is characterized in that, the electro reclamation device includes being arranged on the anode electrolytic tank 4 in contaminated soil area and cathode electrolytic cell 10, anode
There is anode 3 in electrolytic cell 4, there is cathode 9 in cathode electrolytic cell 10, anolyte supply tan 1 is anode electrolysis by peristaltic pump 1
4 make up anode electrolyte of slot, keeps 4 constant liquid level of anode electrolytic tank, and cathode electrolytic cell 10 is electric by cathode by peristaltic pump 2 22
Solution liquid is sent to catholyte collecting tank 12,6 jointed anode 3 of DC power supply and cathode 9, wherein, the cathode 9 is by base material
And the Nanometer Copper chip arrays composition of substrate material surface is carried on, alternatively, the cathode 9 is advanced oxidation air cathode..
The anode electrolytic tank 4 and cathode electrolytic cell 10 are separated out with sieve and soil.
There are monitoring probe 11 and water-level gauge 13 in the cathode electrolytic cell 10, connect between the DC power supply 6 and anode 3
There is ammeter 5, voltmeter 14 is parallel between anode 3 and cathode 9.
The cathode 9 is by base material and when being carried on the Nanometer Copper chip arrays of substrate material surface and forming, the nanometer
Copper sheet array is uniformly distributed in substrate material surface, stable structure, the base material be foam metal, the nanometer copper sheet battle array
Row are carried on substrate material surface by constant potential electro-deposition；The foam metal for foam copper, foamed iron, nickel foam and
One kind in copper, iron, nickel foam alloy.
When the cathode 9 is oxidation air cathode, oxidation air cathode is prepared according to following steps：
Step 1, it with stainless (steel) wire, titanium net etc. for collector, cleans spare；
Step 2, the binding agents such as PVDF, PTFE are dissolved in the organic solutions such as dimethylacetylamide (DMAc), ultrasound is stirred
Dissolving is mixed, prepares certain density binder solution；
Step 3, a certain proportion of activated carbon, carbon black, binder solution are weighed, is sufficiently mixed uniformly, is uniformly applied to
Collector one side in step 1；
Step 4, the electrode that wipes will be applied and be immersed in 30min in ultra-pure water, it is spare that taking-up is placed on natural air drying in draught cupboard,
Build oxidation air cathode.
The contaminated soil is practical contaminated site soil, laboratory filling soil or simulation soil such as kaolin, illiteracy are de-
Soil, quartz sand etc., moisture content range 15%-80%, the spacing of anode electrolytic tank 4 and cathode electrolytic cell 10 in soil area are
10cm-10m。
The DC power supply 6 is the electricity of D.C. regulated power supply, DC frequency-changing power supply or AC power through over commutation inversion of direct current
One kind in signal is pressed, electric field strength is not for 0V/m-600V/m and including 0V/m.
Electrolyte, the catholyte and anode electrolysis are each filled in the anode electrolytic tank 4 and cathode electrolytic cell 10
Liquid is one kind in practical underground water, tap water, experiment water distribution.
The anode 3 is mixed oxide MMO electrodes, platinum electrode, graphite electrode, glass-carbon electrode, iron electrode, stainless steel electricity
One kind in extremely；The arrangement mode of the anode 3 and cathode 9 can be that arranged in parallel or polygonal arrangement is distributed.
The present invention also provides it is a kind of using the original position it is electronic-electrochemistry collaboration repairing polluted soil and underground water dress
The method put, which is characterized in that include the following steps：
Step 1, anode 3 and cathode 9 are respectively arranged in 4 He of anode electrolytic tank of contaminated soil area polluted soil both sides
Cathode electrolytic cell 10, anode electrolytic tank 4 and cathode electrolytic cell 10 are separated out with sieve and soil；
Step 2, pass through water-level gauge 13, anolyte supply tan 1, catholyte collecting tank 12, peristaltic pump 1, peristaltic pump
2 22 adjust 10 constant liquid level of anode electrolytic tank 4 and cathode electrolytic cell, connect DC power supply 6, start electro reclamation；
Step 3, with the concentration of pollutant and the production of contaminant degradation in monitoring probe 11 in real time monitoring cathode electrolytic cell 10
Object concentration, the volume change of 12 solution of record catholyte collecting tank, the curent change in soil media, soil media
Voltage's distribiuting changes, and it is 1-180d to determine repairing efficiency；Pollutant migrates attached to cathode 9 under the driving effect of electrodialysis stream
Closely, in cathode 9 electrochemical reduction degradation reaction occurs for pollutant, to realize pollutant electrokinetic migration and electricity in soil and groundwater
The collaboration of chemical degradation.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) electrode provided by the invention, by constructed by an easy step electro-deposition, having stable nanometer sheet surface knot
Structure, improves the electrochemical catalysis activity of degradation of contaminant, and easy electrode preparation flow reduces electrode fabrication cost.
(2) electro reclamation device provided by the invention is equipped with the electrode constructed by the present invention, and pollutant is in electrodialysis stream
It can be degraded after being migrated under effect to cathode by electrochemical reaction, realize the electric field-enhanced driving migration of pollutant and cathode
Effective collaboration of electrochemical in-situ degradation.
(3) electric repair method provided by the invention avoids the extraction after-treatment of catholyte and additional addition
Reductant-oxidant, setting PRB, the frequent of electrode such as replace at the complicated cumbersome engineering problem, and easy operating process reduces electricity
The dynamic quantities repaired and rehabilitation cost.
Description of the drawings
In order to illustrate more clearly of device and method according to the present invention, make required in being described below to embodiment
Attached drawing is briefly described, but it should be evident that drawings discussed below is only merely the embodiment of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, other improvements are can also be obtained according to these attached drawings
The attached drawing of type.
Fig. 1 is the electrode surface scanning electron microscope that the present invention electronic-electrochemistry in situ cooperates with repairing polluted soil and underground water
(SEM) figure.
Fig. 2 is the schematic device that the present invention electronic-electrochemistry in situ cooperates with repairing polluted soil and underground water.
Fig. 3 is the method for the present invention cathode chamber amount of pollutant accumulation.
Fig. 4 is the method for the present invention cathode chamber contaminant degradation product (chlorion) production quantity.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
Clear, complete description is carried out to technical scheme of the present invention with reference to the accompanying drawings and examples, it is clear that retouch below
The embodiment stated is the part of the embodiment of the present invention, instead of all the embodiments, not to present disclosure and protection model
It encloses and is construed as limiting, anyone is combined and is not having under the enlightenment of the present invention or by the feature of the present invention and other prior arts
There is the other embodiment obtained under the premise of making creative work, belong to protection scope of the present invention.
Embodiment 1. prepares the electrode with nano surface structure for catalytic degradation organic pollution
(1) nickel foam of diameter 5.7cm is taken, is impregnated 15 minutes with acetone ultrasound, ultra-pure water cleans up, then with 1%
Sulfuric acid ultrasound is impregnated 15 minutes, and ultra-pure water cleans up, and dry；
(2) 250mL electrolyte is taken in 260mL electrolytic cells, using step (1) nickel foam as working electrode, mixed oxide
(MMO) electrode is to electrode, and Ag/AgCl saturations KCl is reference electrode, forms three-electrode system；Electrolyte forms：
0.03mol/L copper sulphate (CuSO4·5H2O), 0.0025mol/L nickel sulfates (NiSO4·6H2O), 0.24mol/L biphosphates
Sodium (NaH2PO4·H2O), 0.05mol/L sodium citrates (Na3C6H5O7·2H2O), 0.50mol/L boric acid (H3BO3)；
(3) cathode potential is set as -0.92V, carries out permanent potential deposition at ambient temperature, sedimentation time is 10 minutes,
Simultaneously drying for standby is cleaned with ultra-pure water.
Fig. 1 show the surface topography map of electrode prepared by embodiment 1, is uniformly given birth in foam nickel surface as seen from the figure
Have the close nanometer copper sheet of arrangement.
Embodiment 2. prepares advanced oxidation air cathode
(1) titanium net of diameter 5.7cm is taken, is impregnated 15 minutes with acetone ultrasound, ultra-pure water cleans up, then with 1% sulphur
Sour ultrasound is impregnated 15 minutes, and ultra-pure water cleans up, and dry；
(2) PVDF powder is dissolved in dimethylacetylamide (DMAc) solution, ultrasonic agitation dissolving prepares concentration 10%
PVDF solution；
(3) the PVDF solution of 700mg activated carbons, 70mg carbon blacks, 2.33mL10% are weighed, is sufficiently mixed uniformly, uniformly
Smear titanium net one side in (1)；
(4) electrode that wipes will be applied and be immersed in 30min in ultra-pure water, it is spare that taking-up is placed on natural air drying in draught cupboard, i.e.,
Build advanced oxidation air cathode.
The electric device and method of 3. in-situ immobilization contaminated soil of embodiment and underground water
(1) electrolyte is prepared：Sodium sulphate is added in a certain amount of ultra-pure water, is configured to the Na of 1.3g/L2SO4Solution is treated
With；The another Na for matching 1.3g/L2SO4Solution adds in excessive trichloro ethylene, is equipped with saturation trichloro ethylene solution, as simulating pollution
Lower water.
(2) tested simulation soil is prepared：It is sufficiently mixed uniformly with 31% kaolin and 69% quartz sand (100~200 mesh),
Prepared electrolyte is that the initial aqueous rate of the tested soil of solution control is 23.5%, unit weight 1.9g/cm3, it is loaded on diameter
5cm, the cylindrical reactor of long 10cm；With reference to Fig. 2, the cylindrical reactor that cylindrical reactor both sides respectively meet diameter 5cm, long 5cm is made
For anode electrolytic tank 4 and cathode electrolytic cell 10, and separated with glass fiber filter paper and nylon wire with tested soil；Anode electrolytic tank
Polluted underground water 7 and contaminated soil 8 are distributed between 4 and cathode electrolytic cell 10, anode electrolytic tank 4 installs the mixed of diameter 5.7cm
Oxide electrode (MMO) is closed as anode 3, cathode electrolytic cell 10 installs the cathode 9 of diameter 5.7cm；
(3) Na of 1.3g/L is prepared in the addition of cathode electrolytic cell 102SO4Solution, anode electrolytic tank 4 add in a certain amount of
The Na of 1.3g/L2SO4Solution and trichloro ethylene saturated solution, it is 100mg/L to make trichloro ethylene initial concentration in anode electrolytic tank 4；
Anode and cathode electrolytic cell connects gas collection bag by gas vent respectively, and anode electrolytic tank 4 connects anolyte supply tan 1, controls anolyte
Invariant position；Cathode electrolytic cell 10 connects catholyte collecting tank 12；
(4) anode 3 and cathode 9 with DC power supply 6 are connected with conducting wire, open power switch, start electro reclamation；With number
Acquired in real time according to collector by medium electric current, voltage's distribiuting changes in medium, collected every 2h record catholytes
Liquor capacity changes in slot, and measures trichloro ethylene concentration, chlorine ion concentration in 10 solution of cathode electrolytic cell, and the test period is
For 24 hours, column soil media is divided into 10 parts after the test, measures the distribution of trichloro ethylene in soil media.
Test example 1
It is repaiied using the cuprum nickle duplex metal cathode with nano surface structure constructed by embodiment 1 as electronic in embodiment 2
Cathode in apparatus for coating, direct current power source voltage 40V after starting electro reclamation continuous service test for 24 hours, measure trichlorine in medium
Ethylene concentration is evenly distributed, in catholyte trichloro ethylene concentration changes with time as shown in figure 3, chlorine ion concentration at any time
Between variation as shown in figure 4, catholyte detection a concentration of 0.94mg/L of trichloro ethylene after for 24 hours, chlorine ion concentration is
10.57mg/L shows that trichloro ethylene penetrates under electric field driven, and migrating to the trichloro ethylene of cathode has 97.2% in cupro-nickel
Electrochemical degradation occurs for bimetallic cathode surface, leads to trichloro ethylene cumulant unobvious, and chlorion is accumulated, and then tests
Demonstrate that the migration of electronic reinforcing trichloro ethylene and electrochemical cathode degrade effective cooperates with.
Test example 2
It is repaiied using the cuprum nickle duplex metal cathode with nano surface structure constructed by embodiment 1 as electronic in embodiment 2
Cathode in apparatus for coating, direct current power source voltage 30V after starting electro reclamation continuous service test for 24 hours, measure trichlorine in medium
Ethylene concentration is evenly distributed, in catholyte trichloro ethylene concentration changes with time as shown in figure 3, chlorine ion concentration at any time
Between variation as shown in figure 4, catholyte detection a concentration of 0.42mg/L of trichloro ethylene after for 24 hours, chlorine ion concentration is
12.01mg/L shows that trichloro ethylene penetrates under electric field driven, and migrating to the trichloro ethylene of cathode has 97.4% in cupro-nickel
Electrochemical degradation occurs for bimetallic cathode surface, leads to trichloro ethylene cumulant unobvious, and chlorion is accumulated, and then tests
Demonstrate that the migration of electronic reinforcing trichloro ethylene and electrochemical cathode degrade effective cooperates with.
Comparative experimental example 1.
Cathode in using mixed oxide (MMO) electrode as electro reclamation device in embodiment 2, direct current power source voltage are
30V after starting electro reclamation continuous service test for 24 hours, measures trichloro ethylene uniform concentration distribution in medium, in catholyte
The concentration changes with time of trichloro ethylene is as shown in figure 3, chlorine ion concentration changes over time as shown in figure 4, catholyte after for 24 hours
Liquid detection trichloro ethylene a concentration of 3.48mg/L, chlorine ion concentration 1.25mg/L show that trichloro ethylene is issued in electric field driven
Life penetrates, and migrating to the trichloro ethylene of cathode has 40% electrochemical degradation occurs in MMO cathode surfaces, and trichloro ethylene is caused to tire out
Product, chlorion cumulant unobvious, electronic reinforcing trichloro ethylene migration do not cooperate with effectively with electrochemical cathode degradation.
Comparative experimental example 2.
Cathode in using not electrodeposited foam nickel electrode as electro reclamation device in embodiment 2, DC power supply electricity
It presses as 30V, after starting electro reclamation continuous service test for 24 hours, measures trichloro ethylene uniform concentration distribution in medium, catholyte
In liquid trichloro ethylene concentration changes with time as shown in figure 3, chlorine ion concentration change over time as shown in figure 4, for 24 hours after cathode
Electrolyte detection trichloro ethylene a concentration of 8.47mg/L, chlorine ion concentration 0.66mg/L show trichloro ethylene in electric field driven
Lower to penetrate, migrating to the trichloro ethylene of cathode has 11% electrochemical degradation occurs in nickel foam cathode surface, leads to trichlorine
Ethylene is accumulated, chlorion cumulant unobvious, and electronic reinforcing trichloro ethylene migration does not cooperate with effectively with electrochemical cathode degradation.
By test example 1, test example 2, comparative experimental example 1, comparative experimental example 2 it is found that pollutant electric field driven effect under,
It can be migrated by anode to cathode, and electrochemistry occurs in the cuprum nickle duplex metal cathode surface with nano surface structure of structure
Degradation, realizes electrokinetic migration and is cooperateed with what electrochemical in-situ was degraded, and in monometallic nickel foam, mixed oxide as cathode
When do not reach effective synergistic effect, show a kind of original position of the present invention it is electronic-electrochemistry collaboration repairing polluted soil and underground
The electrode of water, device and method are effective and feasible.
In the present invention, the cathode of electric device, can be with other than the monometallic with Nanosurface or bimetallic cathode
The advanced oxidation air cathode built based on materials such as carbon black, activated carbons, oxygen air cathode surface by two electronics also
Original route generation hydrogen peroxide (H2O2), it can further be excited and generate hydroxyl radical free radical (OH), be moved under the effect of electrodialysis stream
Removal organic polluter can be achieved the purpose that by oxidation generation carbon dioxide and water by moving to the organic pollution of cathode.
To sum up, the present invention is for catholyte extraction after-treatment, additional addition oxidation during traditional electro reclamation
Reducing agent, the setting coupling techniques engineering construction such as PRB are cumbersome, it is of high cost the problem of, it is proposed that a kind of original position is electronic-electrochemistry association
With the electrode of repairing polluted soil and underground water, device and method, there is nanometer table by prepared by simple electro-deposition method
The cathode of face structure, in electric restoring polluted soil and underground water, realizing electronic reinforcing contaminant transportation and cathode electricity
Effective collaboration of chemical in situ degradation.
Claims (10)
1. a kind of original position is electronic-device of electrochemistry collaboration repairing polluted soil and underground water, it is special including electro reclamation device
Sign is that the electro reclamation device includes being arranged on the anode electrolytic tank (4) in contaminated soil area and cathode electrolytic cell (10), sun
There is anode (3) in pole electrolytic cell (4), there is cathode (9) in cathode electrolytic cell (10), anolyte supply tan (1) passes through peristaltic pump one
(21) it is anode electrolytic tank (4) make up anode electrolyte, keeps anode electrolytic tank (4) constant liquid level, cathode electrolytic cell (10) is logical
Peristaltic pump two (22) is crossed to send catholyte to catholyte collecting tank (12), DC power supply (6) jointed anode (3) and the moon
Pole (9), wherein, the cathode (9) is by base material and is carried on the Nanometer Copper chip arrays of substrate material surface and forms, alternatively,
The cathode (9) is advanced oxidation air cathode.
2. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In the anode electrolytic tank (4) and cathode electrolytic cell (10) are separated out with sieve and soil.
3. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In, have monitoring probe (11) and water-level gauge (13) in the cathode electrolytic cell (10), the DC power supply (6) and anode (3) it
Between be in series with ammeter (5), voltmeter (14) is parallel between anode (3) and cathode (9).
4. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In,
The cathode (9) is by base material and when being carried on the Nanometer Copper chip arrays of substrate material surface and forming, the Nanometer Copper
Chip arrays are uniformly distributed in substrate material surface, stable structure, the base material be foam metal, the Nanometer Copper chip arrays
Substrate material surface is carried on by constant potential electro-deposition；
When the cathode (9) is oxidation air cathode, oxidation air cathode is prepared according to following steps：
Step 1, it with stainless (steel) wire, titanium net etc. for collector, cleans spare；
Step 2, the binding agents such as PVDF, PTFE are dissolved in the organic solutions such as dimethylacetylamide (DMAc), ultrasonic agitation is molten
Solution, prepares certain density binder solution；
Step 3, a certain proportion of activated carbon, carbon black, binder solution are weighed, is sufficiently mixed uniformly, is uniformly applied to step 1
In collector one side；
Step 4, the electrode that wipes will be applied and be immersed in 30min in ultra-pure water, it is spare that taking-up is placed on natural air drying in draught cupboard, i.e. structure
Build oxidation air cathode.
5. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 4
In the foam metal is foam copper, foamed iron, nickel foam and copper, one kind in iron, nickel foam alloy.
6. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In the contaminated soil is practical contaminated site soil, laboratory filling soil or simulates soil, moisture content range 15%-
80%, the spacing of anode electrolytic tank (4) and cathode electrolytic cell (10) in soil area is 10cm-10m.
7. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In the DC power supply (6) is the voltage letter of D.C. regulated power supply, DC frequency-changing power supply or AC power through over commutation inversion of direct current
One kind in number, electric field strength is not for 0V/m-600V/m and including 0V/m.
8. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In being each filled with electrolyte, the catholyte and anolyte in the anode electrolytic tank (4) and cathode electrolytic cell (10)
For one kind in practical underground water, tap water, experiment water distribution.
9. the device of electronic-electrochemistry collaboration repairing polluted soil and underground water in situ, feature exist according to claim 1
In the anode (3) is mixed oxide (MMO) electrode, platinum electrode, graphite electrode, glass-carbon electrode, iron electrode, stainless steel electricity
One kind in extremely；The arrangement mode of the anode (3) and cathode (9) can be that arranged in parallel or polygonal arrangement is distributed.
10. a kind of side using electronic-electrochemistry collaboration repairing polluted soil in situ described in claim 1 and the device of underground water
Method, which is characterized in that include the following steps：
Step 1, anode (3) and cathode (9) are respectively arranged in the anode electrolytic tank (4) of contaminated soil area polluted soil both sides
With cathode electrolytic cell (10), anode electrolytic tank (4) and cathode electrolytic cell (10) are separated out with sieve and soil；
Step 2, by water-level gauge (13), anolyte supply tan (1), catholyte collecting tank (12), peristaltic pump one (21), compacted
Two (22) of dynamic pump adjust anode electrolytic tank (4) and cathode electrolytic cell (10) constant liquid level, connect DC power supply (6), start electronic
It repairs；
Step 3, the concentration of cathode electrolytic cell (10) interior pollutant and the production of contaminant degradation are monitored in real time with monitoring probe (11)
Object concentration, the volume change of record catholyte collecting tank (12) solution, the curent change in soil media, soil are situated between
Matter voltage's distribiuting changes, and it is 1-180d to determine repairing efficiency；Pollutant is migrated under the driving effect of electrodialysis stream to cathode (9)
Near, in cathode (9) electrochemical reduction degradation reaction occurs for pollutant, to realize pollutant electrokinetic migration in soil and groundwater
With the collaboration of electrochemical degradation.
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| CN109127696A (en) * | 2018-10-24 | 2019-01-04 | 河海大学 | The device and method of heavy metal pollution in multiple physical field coupling rehabilitating soil in situ |
| CN109731905A (en) * | 2019-03-01 | 2019-05-10 | 长江水利委员会长江科学院 | A kind of autonomous controllably soil or the electronic acidification device for dissociation of pollutants in sediments and method |
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| CN113275376A (en) * | 2021-06-24 | 2021-08-20 | 南通大学 | Device and method for repairing polluted soft clay |
| CN113582327A (en) * | 2021-07-12 | 2021-11-02 | 东华大学 | Method for restoring soil and underground water by pulse motor-waste textile hydrothermal carbon infiltration reaction wall in cooperation with plants |
| CN114226436A (en) * | 2021-11-30 | 2022-03-25 | 浙江大学杭州国际科创中心 | Metal nanocrystalline modified composite electrode and preparation method and application thereof |
| CN114378109A (en) * | 2021-11-30 | 2022-04-22 | 西安建筑科技大学 | Electric restoration combined multiphase extraction device and method for removing loess organic pollution |
| CN115318820A (en) * | 2022-08-09 | 2022-11-11 | 常州大学 | Method for reducing 2,4-dichlorophenol in soil by using direct current-alternating current cooperated persulfate |
| CN115318821A (en) * | 2022-08-10 | 2022-11-11 | 东南大学 | Microbial electrochemical device and method for removing composite heavy metals in soil |
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