CN108408992A - A kind of regulation and control method in situ of water-bearing layer Redox Condition - Google Patents
A kind of regulation and control method in situ of water-bearing layer Redox Condition Download PDFInfo
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- CN108408992A CN108408992A CN201810073694.XA CN201810073694A CN108408992A CN 108408992 A CN108408992 A CN 108408992A CN 201810073694 A CN201810073694 A CN 201810073694A CN 108408992 A CN108408992 A CN 108408992A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a kind of regulation and control methods in situ of water-bearing layer Redox Condition, it is included in underground water pollution regional construction electrode wells, well casing, the bottom perforated of the well casing is installed in the electrode wells, and be connected to water-bearing layer, the length of perforation is more than Polluted area longitudinal extent；Cathode electrode is installed in the bottom of electrode wells and anode electrode, cathode electrode connect constant voltage dc source with anode electrode；It extracts by the underground water except iron processing, and is pumped into electrode wells；Start constant voltage dc source, and continue to be pumped into the underground water by handling except iron, the oxygen and hydrogen to provide water electrolysis generation in underground in hydraulic gradient driving electrodes well are transmitted to surrounding, carry out the regulation and control in situ of water-bearing layer Redox Condition.The flexible controllability of the method for the present invention is good, at low cost and environmental-friendly, and oxygen and hydrogen are all derived from underground water electrolysis when electrochemical in-situ regulates and controls water-bearing layer, and are consumed in water-bearing layer, will not introduce other invalid or harmful constituents, is disturbed to water-bearing layer property small.
Description
Technical field
The present invention relates to groundwater treatment field more particularly to a kind of regulation and control sides in situ of water-bearing layer Redox Condition
Method.
Background technology
Underground water and surface water are that earth continent water recycles most important two component parts.The people couple compared with surface water
The attention degree of underground water is much lower, but groundwater storage is but considerably beyond total fresh water of all rivers and lakes on the earth
Amount, has accounted for the 98% of land liquid water reserve.Underground water plays very important as important water resource in national economy
Effect.The Drinking Water and agricultural irrigation water of global most area come from underground water, and still, underground water pollution is non-
Chang Yanchong.According to the difference of Forming Mechanism, underground water pollution includes mainly two types.One is artificial caused by mankind's activity
Polluted underground water, as discharge of wastewater, house refuse and industrial residue are banked up, agriculture chemical application etc. caused by quality of groundwater
It dislikes.Another kind is natural poor quality underground water caused by geologic origin, such as the high arsenic height of Hetao Plain, Inner Mongolia, Datong Basin, Shanxi Province
Fluorine underground water.
Currently, groundwater remediation by early stage pump-and-treat system based on be gradually converted into based on in-situ treatment.Pump-and-treat system is
Refer to and polluted underground water is retracted to ground, is reused after processing or recharge is to underground.It is fairly simple due to operating, extraction
Processing is the main processing ways of early stage.But due to constantly recognizing deficiency of the pump-and-treat system in effect and cost later,
People have slowly turned to in-situ treatment.The essence of underground water in-situ immobilization is the certain environmental condition of structure, promotes pollutant point
Solution/conversion detoxification, or include mainly in situ chemical oxidation/reduction, original position from being transferred in underground water in water-bearing media solid phase
Peripheral doses biological prosthetic and in situ etc..Due to that need not extract underground water out, repair process is implemented safer and economical.Oxidation
The regulation and control of reducing condition are the core of in situ chemical oxidation/reduction and biology in situ reparation, including improve and reduce redox
Two kinds of control methods of current potential.Oxidation-reduction potential is improved, i.e., it is to improve groundwater environment oxidation to introduce electron acceptor to water-bearing layer
Reduction potential, the major way for promoting pollutant oxidation removal.Injected electrons receptor includes strong oxidizer such as hydrogen peroxide, height
Manganate, persulfate etc. and relatively mild weak oxidant such as nitrate, oxygen etc..The injection mode of oxidant is most
It is to be configured to the solution of various concentration on ground, water-bearing layer is then injected by well casing using pump.The injection mode of oxygen compares
It is special, including be directly injected into air, injection purity oxygen and injection oxygenated water etc..After injecting oxidant, in chemistry or biological effect
Under, pollutant is by oxidation removal.Oxidation-reduction potential is reduced, i.e., it is to reduce groundwater environment that electron donor is injected into water-bearing layer
Oxidation-reduction potential promotes the major way of pollutant reduction removal.Injected electrons receptor includes sodium dithionite, nanometer
The reducing substances such as Zero-valent Iron, syrup, injection mode are coordination solution or the injection of stable colloid suspension.
Main problem includes existing for the above underground water Redox Condition control technique：(1) medicament injected is all ground
Originally the very low substance of no or content in lower water, medicament can influence even to destroy water-bearing layer property in water-bearing layer decomposition and inversion
Matter, such as persulfate oxidation can reduce pH, Nanoscale Iron reduction can block water-bearing layer；It (2) can be to aqueous when being directly injected into air
It is introduced into a large amount of inert composition (nitrogen that 78% is accounted in such as air) in layer, inert component can occupy water-bearing layer pore-body
Product, and nitrogen has and is converted into the potential risks of other nitrogens, at the same may also by air pollutant (such as particulate matter and
Volatile organic contaminant) underground water is introduced together, and the cost for being directly injected into oxygen is higher.(3) inject drug concentration without
Method flexible modulation, there is a problem of regulation and control it is over or under, such as oxidants hydrogen peroxide injection initial stage excessive concentration and the later stage
Concentration is too low, and solubility limit (such as 1 standard atmospheric pressure and at 25 DEG C be less than 10mg/L) of the air by oxygen in water body
Effective concentration is relatively low.
Invention content
Electron acceptor (oxygen) and electronics are generated by underground water electrolysis in view of this, the embodiment provides one kind
Donor (hydrogen) realizes the water-bearing layer Redox Condition of the green flexible modulation of regulation and control underground water Redox Condition in situ
Regulation and control method in situ.
The embodiment of the present invention provides a kind of regulation and control method in situ of water-bearing layer Redox Condition, includes the following steps：
S1., well casing is installed in underground water pollution regional construction electrode wells, the electrode wells, the bottom of the well casing is worn
Hole, and be connected to water-bearing layer, the length of perforation is more than Polluted area longitudinal extent；
S2. cathode electrode and anode electrode be installed in the bottom of electrode wells, it is straight that cathode electrode with anode electrode connects voltage stabilizing
Galvanic electricity source；
S3. it extracts by the underground water except iron processing, and is pumped into electrode wells；
S4. start constant voltage dc source, control electric current is 0.05~10A, and continues to be pumped into the underground by handling except iron
Water, oxygen and hydrogen to provide water electrolysis generation in underground in hydraulic gradient driving electrodes well are transmitted to surrounding, carry out water-bearing layer
The regulation and control in situ of Redox Condition.
Further, in the step S1, the quantity of electrode wells is determined according to Polluted area size, the service of electrode wells individual well
Radius is 1-8 meters, a diameter of 20-150mm, and well depth, which is more than, needs the underground water buried depth of regulation and control, a diameter of 10-100mm of well casing.
Further, in the step S2, cathode electrode and anode electrode select titanium coating electrode material, cathode electrode and
Anode electrode is plate or mesh electrode, and the length of cathode electrode and anode electrode is less than 5 meters, and width is less than the straight of electrode wells
Diameter.
Further, in the step S2, anode electrode and cathode electrode are drawn by conducting wire respectively, and anode electrode connects
The cathode output end of constant voltage dc source, cathode electrode connect the cathode output end of constant voltage dc source, anode electrode and cathode
Electrode runs parallel is mounted in electrode wells, and the center spacing of anode electrode and cathode electrode is 5~50mm.
Further, in the step S3, come from surface water around electrode wells or auxiliary by the underground water handled except iron
The well depth of main opening, the service well is less than the depth of electrode wells, and can continuously extract underground water out, is equipped in the service well
The under ground portion of well casing, the well casing is all perforated, and ferrous ion concentration is more than in the underground water that the service well extracts
When 1mg/L, an aerated precipitation tank is set, and the oxidation of divalent iron ion in the underground water of extraction sinks in aerated precipitation tank
Removal of forming sediment obtains the underground water by being handled except iron.
Further, in the step S3, the volume that electrode wells are pumped by the underground water handled except iron is well casing volume
10-20 times.
Further, in the step S4, the pollutant type that handles as needed sets the method for operation of electrode wells, when
It when pollutant is needed by oxidation processes, runs in a continuous manner, i.e., be continuously powered to electrode wells and be pumped into underground water；Work as pollution
Species are more, need, through peroxidating and when reduction treatment, to run with intermittent mode, i.e. the operation phase is powered simultaneously to electrode wells simultaneously
It is pumped into underground water, both the standing stage stops, and the Duration Ratio control for running and standing the stage is 1:2-1:20.
Compared with prior art, the invention has the advantages that：Flexible controllability is good, at low cost and environmental-friendly,
When electrochemical in-situ regulates and controls water-bearing layer Redox Condition, it is electrolysed the oxygen of generation and hydrogen is all derived from underground water decomposition,
And consumed in water-bearing layer, therefore other invalid or harmful constituents will not be introduced, water-bearing layer property is disturbed small；Underground water electrolysis
It generates oxygen and the rate of hydrogen and the electric current of application is directly proportional, can quantitatively control oxygen by adjusting size of current in earth's surface
With the generation rate of hydrogen, very flexibly, and automation easy to implement；Oxygen and the hydrogen difference that underground water electrolysis generates simultaneously
The effect of oxidation and reduction is played, and the time sequencing that the two plays a role is different, such control methods ensure that aqueous
Layer Redox Condition may finally be restored to initial level, avoid traditional approach due to a certain oxidation of addition or go back active compound
Agent and the problem of ultimately form oxidation or reducing condition.
Description of the drawings
Fig. 1 is an a kind of principle schematic of the regulation and control method in situ of water-bearing layer Redox Condition of the present invention.
Fig. 2 is that electrolysis oxidation effect changes with time in simulated groundwater well in embodiment 1.
Fig. 3 is that electrolysis oxidation effect changes with time in simulation water-bearing layer well casing in embodiment 2.
Fig. 4 is the regulating effect being electrolysed in practical water-bearing layer well casing in embodiment 3 to oxidation-reduction potential.
Fig. 5 be when electrolysis regulates and controls Redox Condition in practical water-bearing layer well casing in embodiment 3 in underground water ferrous iron from
The variation of sub- concentration.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
The embodiment provides a kind of regulation and control methods in situ of water-bearing layer Redox Condition, including following step
Suddenly：
S1. in underground water pollution regional construction electrode wells, the quantity of electrode wells is determined according to Polluted area size, electrode wells
The service radius of individual well is 1-8 meters, i.e., the service radius of each electrode wells is 1-8 meters, a diameter of 20-150mm, and well depth, which is more than, to be needed
The underground water buried depth to be regulated and controled installs well casing in the electrode wells, and a diameter of 10-100mm of well casing, the bottom of the well casing is worn
Hole, and be connected to water-bearing layer, the length of perforation is more than Polluted area longitudinal extent；
S2. cathode electrode and anode electrode are installed in the bottom of electrode wells, cathode electrode and anode electrode select titanium to apply
Layer electrode material, cathode electrode and anode electrode are plate or mesh electrode, in favor of water flowing and improve current efficiency,
The length of cathode electrode and anode electrode is less than 5 meters, and width is less than the diameter of electrode wells, and cathode electrode connects surely with anode electrode
DC power supply, anode electrode and cathode electrode is pressed to be drawn respectively by conducting wire, and anode electrode connection constant voltage dc source is just
Pole output end, cathode electrode connect the cathode output end of constant voltage dc source, and anode electrode and cathode electrode are installed in parallel in electricity
In the well of pole, and the center spacing of anode electrode and cathode electrode is that 5~50mm is tied up using plastic ties respectively in one embodiment
Then the anode electrode fixed and cathode electrode suspension are put into electrode wells by firmly anode electrode and cathode electrode to take out
Until bottom；
S3. it extracts by the underground water except iron processing, the ground around electrode wells is come from by the underground water handled except iron
Table water or service well can directly extract surface water when having available surface water (such as river water) around electrode wells, not have to build auxiliary
Main opening；When around without available surface water, a bite service well need to be beaten near electrode wells, the well depth of the service well is less than electricity
The depth of pole well, and can continuously extract underground water out, well casing is installed, the under ground portion of the well casing is whole in the service well
It perforates, when ferrous ion concentration is more than 1mg/L in the underground water that the service well extracts, an aerated precipitation tank is set, and
The oxidation of divalent iron ion precipitation removal in the underground water of extraction is obtained into the ground by being handled except iron in aerated precipitation tank
Lower water, and be pumped into electrode wells, the volume for being pumped into electrode wells is 10-20 times of well casing volume, to remove intrinsic in well casing go back
Originality underground water avoids iron precipitation from causing to block；
S4. start constant voltage dc source, control electric current is 0.05~10A, and continues to be pumped into the underground by handling except iron
Water, oxygen and hydrogen to provide underground water generation in hydraulic gradient driving electrodes well are transmitted to surrounding carries out water-bearing layer oxidation also
The regulation and control in situ of old terms, as shown in Figure 1, the pollutant type wherein handled as needed sets the operation side of electrode wells
Formula is run in a continuous manner when pollutant is needed by oxidation processes；When pollutant kind is more, need through peroxidating and also
It when original place is managed, is run with intermittent mode, electrolysis and time of repose are according to 1 when intermittent duty:2-1:20 are arranged, and the intermittent phase is not necessarily to
It is pumped into the underground water by being handled except iron.
Embodiment 1：Using being coated with IrO2And Ta2O5Plate titanium-matrix electrode as cathode electrode and anode electrode, cathode electricity
Pole and anode electrode are plate, wide 2cm, thickness 2mm, long 10cm.Cathode electrode and anode electrode are placed in parallel according to distance 1cm
And it is fixed.The electrode wells for intending installing in water-bearing layer using polyvinyl chloride (PVC) pipe die, well casing outer diameter is 50mm, internal diameter is
47mm, length 150cm.Pvc pipe bottom seals, and side same direction equidistantly leaves 3 holes, is inserted into dissolved oxygen probe.It will be cloudy
Pole electrode is put into pvc pipe bottom after being connected using conducting wire with anode electrode, 2.1 liters of simulated groundwaters are injected into well casing and (are contained
The deionized water of 5mmol/L calcium chloride, 2.1mmol/L magnesium chlorides and 16.4mmo/L sodium bicarbonates), and it is passed through nitrogen to bottom
Remove the oxygen of dissolving.Stop leading to nitrogen when dissolved oxygen probe reading is reduced to 0, using constant voltage dc source to cathode electrode and
Anode electrode applies 0.6A electric currents, and dissolved oxygen probe is read in the height of monitoring pvc pipe side 3.
As a result as shown in Fig. 2, due to electrolysis, dissolved oxygen concentration is increased to the left sides 8mg/L in 80 minutes in pvc pipe
The right side, it is suitable with saturation of the air concentration.
Embodiment 2：Using being coated with IrO2And Ta2O5Plate titanium-matrix electrode as cathode electrode and anode electrode, cathode electricity
Pole and anode electrode are plate, wide 2cm, thickness 2mm, long 10cm.Cathode electrode and anode electrode are placed in parallel according to distance 1cm
And it is fixed.The electrode wells for intending installing in water-bearing layer using polyvinyl chloride (PVC) pipe die, well casing outer diameter is 50mm, internal diameter is
47mm, length 50cm.Pvc pipe bottom seals, uniformly drill by spacing 3cm in the 20cm of bottom (aperture 2cm) and
Outside connection, and upper nylon gauze is covered as strainer around pipe.Using cylindrical glass bucket as simulation water-bearing layer, bucket diameter
For 10cm, high 30cm, side is far from drilling installation dissolved oxygen probe at the 10cm of bottom surface.Pvc pipe is placed on to the axle center of glass tank vertically
Position uses the quartz sand filling glass bucket that average grain diameter is 0.3mm.Cathode electrode, anode electrode and dissolved oxygen probe are put
Enter pvc pipe bottom.Into glass tank inject simulated groundwater (containing 5mmol/L calcium chloride, 2.1mmol/L magnesium chlorides and
The deionized water of 16.4mmo/L sodium bicarbonates), and it is passed through the oxygen in nitrogen removal simulated groundwater from glass bottom of the barrel.When
Dissolved oxygen probe reading in glass tank side and pvc pipe stops leading to nitrogen when being reduced to 0, electric to cathode using constant voltage dc source
Pole and anode electrode apply 0.6A electric currents, monitoring solubilised state probe reading.As a contrast, it while having done and is not filled with stone in glass tank
Effect when sand is only filled with simulated groundwater and is not powered to electrode.
As a result as shown in Fig. 3, due to the electrolysis in pvc pipe, the dissolved oxygen in glass tank quartz sand pore water is dense
Degree is increased to 5mg/L or more in 30 minutes, and oxidation effect is substantially better than the case where not being electrolysed.
Embodiment 3：【Practical water-bearing layer】It is underground 0-18 meters to rely on the high ferro underground water of certain field locations, aquifer structure
For sandy silt and argillic horizon, 18 meters or less are fine sand and coarse sands layer, and the main preservation of artesian aquifer is in 18 meters of layers of sand below
In, local resident's well is also fetched water in the hole artesian aquifer of 10-45m depths mostly.
Electrode wells are bored in this area, and well casing is installed, well casing is preferably polyvinyl chloride (PVC) casing, and sleeve outer is
50mm, internal diameter 47mm, length 26m.Within the scope of sleeve bottom 2.4m by spacing about 3cm uniformly drill (aperture 2cm) with
Outside connection, and upper nylon gauze is covered as strainer around pipe.Using being coated with IrO2And Ta2O5Plate titanium-matrix electrode conduct
Cathode electrode and anode electrode, two electrodes are plate, wide 3cm, thickness 0.3cm, long 100cm.Cathode electrode and anode electrode are pressed
Range is placed in parallel and is fixed from 0.8cm, is hung up into PVC sleeve bottoms using conducting wire connection rear overhang.Use a pond
Accumulate tap water and be used as water source by the underground water except iron processing, with create in hydraulic gradient reinforcing well casing oxygen and hydrogen to
Surrounding aqueous layer transmits.1.2 side's tap water are injected into well casing with 1.2 sides/hour flow velocity, in the injecting process simultaneously into well casing
Cathode electrode and anode electrode apply 3A current electrifyings 1 hour, be then allowed to stand after 13 hours with 1.1 sides/hour flow velocity from well
Groundwater abstraction in pipe.As a contrast, 1.2 sides are injected into well casing originally with 1.2 sides/hour flow velocity in another battery of tests
Water, but no power, with 1.1 sides/hour flow velocity groundwater abstraction from well casing after standing 13 hours.
As a result as shown in Fig. 4, due to the electrolysis in casing, the oxidation-reduction potential of underground water is in the initial stage quilt that draws water
Significantly increase, it is significantly more when then restoring to original lower value, and changing than not applying electrolysis.Two in attached drawing 5
It is heavy that valence iron ion result of variations shows that the oxygen for being electrolysed generation results in oxidation of the underground water ferrous ion in water-bearing layer
It forms sediment, makes the underground water of early stage extraction almost without ferrous ion, then slowly increase.
The flexible controllability of the present invention is good, at low cost and environmental-friendly, and electrochemical in-situ regulates and controls water-bearing layer Redox Condition
When, it is electrolysed the oxygen of generation and hydrogen is all derived from underground water decomposition, and consumed in water-bearing layer, therefore other will not be introduced
Invalid or harmful constituent disturbs water-bearing layer property small；Underground water electrolysis generates oxygen and the rate of hydrogen and the electric current of application
It is directly proportional, it very flexibly, and can be easy by adjusting the generation rate that size of current quantitatively controls oxygen and hydrogen in earth's surface
Realize automation；The oxygen and hydrogen that underground water electrolysis generates simultaneously play the effect of oxidation and reduction respectively, and the two is sent out
The time sequencing for waving effect is different, and such control methods ensure that water-bearing layer Redox Condition may finally be restored to initially
Level is avoided traditional approach and is ultimately formed asking for oxidation or reducing condition due to a certain oxidation of addition or reduction medicament
Topic.
Herein, the nouns of locality such as involved front, rear, top, and bottom are to be located in figure with parts in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of regulation and control method in situ of water-bearing layer Redox Condition, which is characterized in that include the following steps：
S1., well casing is installed in underground water pollution regional construction electrode wells, the electrode wells, the bottom perforated of the well casing, and
It is connected to water-bearing layer, the length of perforation is more than Polluted area longitudinal extent；
S2. cathode electrode is installed in the bottom of electrode wells and anode electrode, cathode electrode connects direct current of voltage regulation with anode electrode
Source；
S3. it extracts by the underground water except iron processing, and is pumped into electrode wells；
S4. starting constant voltage dc source, control electric current is 0.05~10A, and continues to be pumped into the underground water by handling except iron, with
The oxygen and hydrogen for providing water electrolysis generation in underground in hydraulic gradient driving electrodes well are transmitted to surrounding, carry out water-bearing layer oxidation also
The regulation and control in situ of old terms.
2. the regulation and control method in situ of water-bearing layer Redox Condition according to claim 1, which is characterized in that the step
In S1, the quantity of electrode wells is determined according to Polluted area size, and the service radius of electrode wells individual well is 1-8 meters, electrode wells diameter
For 20-150mm, well depth, which is more than, needs the underground water buried depth of regulation and control, a diameter of 10-100mm of well casing.
3. the regulation and control method in situ of water-bearing layer Redox Condition according to claim 1, which is characterized in that the step
In S2, cathode electrode and anode electrode select titanium coating electrode material, and cathode electrode and anode electrode are plate or netted
The length of electrode, cathode electrode and anode electrode is less than 5 meters, and width is less than the diameter of electrode wells.
4. the regulation and control method in situ of water-bearing layer Redox Condition according to claim 1, which is characterized in that the step
In S2, anode electrode and cathode electrode are drawn by conducting wire respectively, and the anode output of anode electrode connection constant voltage dc source
End, cathode electrode connect the cathode output end of constant voltage dc source, and anode electrode and cathode electrode are installed in parallel in electrode wells,
And the center spacing of anode electrode and cathode electrode is 5~50mm.
5. the regulation and control method in situ of water-bearing layer Redox Condition according to claim 1, which is characterized in that the step
In S3, come from surface water or service well around electrode wells by the underground water handled except iron, the well depth of the service well is small
It in the depth of electrode wells, and can continuously extract underground water out, well casing, the under ground portion of the well casing are installed in the service well
It all perforates, when ferrous ion concentration is more than 1mg/L in the underground water that the service well extracts, an aeration and sedimentation is set
Pond, and obtain the oxidation of divalent iron ion precipitation removal in the underground water of extraction by removing iron processing in aerated precipitation tank
Underground water.
6. the regulation and control method in situ of water-bearing layer Redox Condition according to claim 1, which is characterized in that the step
In S3, the volume that electrode wells are pumped by the underground water handled except iron is 10-20 times of well casing volume.
7. the regulation and control method in situ of water-bearing layer Redox Condition according to claim 1, which is characterized in that the step
In S4, the pollutant type that handles as needed sets the method for operation of electrode wells, when pollutant is needed by oxidation processes
When, it runs in a continuous manner, i.e., is continuously powered to electrode wells and is pumped into the underground water by being handled except iron；Work as pollutant kind
It is more, need, through peroxidating and when reduction treatment, to run with intermittent mode, i.e., the operation phase be powered simultaneously to electrode wells and be pumped into through
The underground water except iron processing is crossed, both the standing stage stops, and the Duration Ratio control for running and standing the stage is 1:2-
1:20。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357348A (en) * | 2019-06-27 | 2019-10-22 | 中国地质大学（武汉） | A kind of chlorohydrocarbon polluted underground water electrochemical in-situ circulation well restorative procedure |
| CN112711087A (en) * | 2019-10-25 | 2021-04-27 | 住友化学株式会社 | Method and apparatus for producing polarizing film |
| CN114573085A (en) * | 2022-02-23 | 2022-06-03 | 清华大学 | Electrode well and method for in-situ electricity generation of hydrogen peroxide by underground water |
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| US20060016763A1 (en) * | 2004-07-20 | 2006-01-26 | Kerfoot William B | Superoxidant poiser for groundwater and soil treatment with in-situ oxidation-reduction and acidity-basicity adjustment |
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| CN110357348A (en) * | 2019-06-27 | 2019-10-22 | 中国地质大学（武汉） | A kind of chlorohydrocarbon polluted underground water electrochemical in-situ circulation well restorative procedure |
| CN110357348B (en) * | 2019-06-27 | 2021-12-28 | 中国地质大学（武汉） | In-situ electrochemical circulation well repairing method for chlorohydrocarbon polluted underground water |
| CN112711087A (en) * | 2019-10-25 | 2021-04-27 | 住友化学株式会社 | Method and apparatus for producing polarizing film |
| CN114573085A (en) * | 2022-02-23 | 2022-06-03 | 清华大学 | Electrode well and method for in-situ electricity generation of hydrogen peroxide by underground water |
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