CN106914486A - The electro reclamation device and electric repair method of heavy-metal contaminated soil - Google Patents
The electro reclamation device and electric repair method of heavy-metal contaminated soil Download PDFInfo
- Publication number
- CN106914486A CN106914486A CN201710295059.1A CN201710295059A CN106914486A CN 106914486 A CN106914486 A CN 106914486A CN 201710295059 A CN201710295059 A CN 201710295059A CN 106914486 A CN106914486 A CN 106914486A
- Authority
- CN
- China
- Prior art keywords
- heavy
- contaminated soil
- metal contaminated
- reclamation device
- electro reclamation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The invention discloses the electro reclamation device and electric repair method of a kind of heavy-metal contaminated soil.The electro reclamation device includes power supply and body, anode region, detoxification area and cathodic region are disposed with body, filter plate is provided between anode region and detoxification area, composite filter plate is provided between detoxification area and cathodic region, anode region is connected with the positive pole of power supply, cathodic region is connected with the negative pole of power supply, anode region is made up of anode region pole plate and nutrient solution, cathodic region is made up of cathodic region pole plate and buffer solution, composite filter plate is stacked and constituted by the filter paper and porous sintered glass of load type active carbon, power supply is programmable DC power supply, and voltage is square wave pulse voltage.Electric repair method includes being placed in pretreated heavy-metal contaminated soil in electro reclamation device being repaired.Electro reclamation device and method of the invention has the advantages that alkalescence band migration problem can be solved, improves remediation efficiency, reduce soil nutrient loss, reduce power consumption.
Description
Technical field
The invention belongs to soil remediation field, it is related to the controlling device and administering method of a kind of heavy-metal contaminated soil, has
Body is related to a kind of electro reclamation device of heavy-metal contaminated soil and electric repair method.
Background technology
Issued according to China Geological Survey Bureau《Chinese arable land GEOCHEMICAL SURVEY reports (2015)》It has been shown that, China has 3488
In ten thousand mu of heavy metals-arable land of serious pollution, and area coverage up to 78,990,000 mu slight-slight pollution or exceeded plough
Ground, pollution or exceeded arable land are mainly distributed on southern Xiang Ewangan areas, Min Yueqiong areas and Southwest Region.Heavy metal in soil is not
Only result in Crop yield and quality decline, while can be enriched with by crops and by food chain endanger the mankind health, for example
Rice containing cadmium etc..
In view of the harmfulness of current China heavy metal pollution of soil, State Council put into effect on May 28th, 2016《Soil is dirty
Dye prevents and treats action plan》(referred to as " ten, soil ")." ten, soil " proposes to arrive the year two thousand twenty, and contaminated achilles tendon tear utilization rate reaches
90% or so, pollution plot safe utilization rate reaches more than 90%.The issue of " ten, soil " by heavy-metal contaminated soil to being repaiied
Recovering technology proposes the powerful market demand.
For heavy metal pollution of soil, the research of presently relevant recovery technique mainly include such as chemical extraction, immobilization,
Apply the technologies such as modifying agent, phytoremediation, microorganism remediation, electric power.Wherein, electric repairing technique is to develop nearly ten years
A kind of new soil recovery technique for having much potentiality come, because its is simple to operate, repair time is short, efficiency high the features such as, receive
The extensive concern of domestic and international researcher is arrived.
But, also there are some limiting factors in existing electric repairing technique, be mainly manifested in market-oriented application aspect
Following aspects：
1) negative electrode alkalescence band is migrated to anode, is caused heavy metal precipitation and cannot be moved out.PH control in the soil liquid from
Son adsorption and desorption, precipitation with dissolving etc..Under electric field action, the OH that negative electrode is produced-To be moved to anode direction along earth pillar
It is dynamic, negative electrode alkalescence band is formed, and the heavy metal ion of positively charged is moved to cathode direction.So heavy metal ion will be with OH-
Certain point meets in earth pillar, and generates heavy metal precipitation, causes heavy metal to move out, it is also possible to block soil micropore, causes soil
Earth conductance reduction, remediation efficiency declines.
2) electrokinetic process does not have selectivity, causes soil nutrient impoverishment.Electro reclamation mainly by electric field as driving force,
Positively charged cation is under electric field action toward cathodic migration, because electric field does not have selectivity, K in soil+Deng nutrient
While also toward cathodic migration out；Additionally, the nutrient such as soil N P can also be lost in heavy metals removal, finally lead
Cause soil nutrient impoverishment.
3) power consumption is big, and rehabilitation expense is high.Current electro reclamation generally uses galvanic powering mode.Research
Show traditional electro reclamation 1m3Contaminated soil about consumes the electric power of 40kwh, and whole processing cost is approximately equivalent to 10 times of electric power
Spend, that is, processing the contaminated soil of 1t about needs to spend 400 yuan, and the expense of the method for routine treatment 1t contaminated soils is only 250
Unit or so.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, there is provided one kind can solve alkalescence band migration and ask
Topic, improve remediation efficiency, reduce soil nutrient be lost in, reduce power consumption heavy-metal contaminated soil electro reclamation device and
Electric repair method.
In order to solve the above technical problems, the present invention uses following technical scheme.
A kind of electro reclamation device of heavy-metal contaminated soil, the electro reclamation device includes power supply and body, described
Anode region, detoxification area and cathodic region are disposed with body, filter plate is provided between the anode region and the detoxification area, it is described
Composite filter plate is provided between detoxification area and the cathodic region, the anode region is connected with the positive pole of power supply, the cathodic region with electricity
The negative pole in source is connected；
The anode region is made up of anode region pole plate and nutrient solution, and the cathodic region is by cathodic region pole plate and buffer solution group
Into the composite filter plate is stacked and constituted by the filter paper and porous sintered glass of load type active carbon, the filter paper of the load type active carbon
Near detoxification area side；
The power supply is programmable DC power supply, and the programmable DC power supply has electric current viewing area, described to compile
The voltage that journey dc source is provided is square wave pulse voltage.
In the electro reclamation device of above-mentioned heavy-metal contaminated soil, it is preferred that the anode region pole plate is by supported catalyst
The titanium-based material of agent is constituted, and the titanium-based material is titanium plate, and the mass fraction of titanium is 87%~99%, the catalyst in the titanium plate
It is ruthenic oxide, the load capacity of the catalyst is 0.4mg/cm2~0.8mg/cm2；The positive pole of the anode region pole plate and power supply
It is connected, the anode region blade portion sub-dip is in nutrient solution.
In the electro reclamation device of above-mentioned heavy-metal contaminated soil, it is preferred that the cathodic region pole plate is by aluminum structure
Into the aluminum is aluminium sheet, and the mass fraction of aluminium is 92%~99% in the aluminium sheet；The cathodic region pole plate and power supply
Negative pole is connected, and the cathodic region blade portion sub-dip is in buffer solution.
In the electro reclamation device of above-mentioned heavy-metal contaminated soil, it is preferred that the nutrient solution is composed of the following components：
0.2mol/L~0.4mol/L humic acid, 0.1mol/L~0.3mol/L citric acids and 0.05mol/L~0.1mol/L potassium nitrate；
And/or, the buffer solution is kaliumphosphate buffer, and the pH value of the buffer solution is 6~9.
In the electro reclamation device of above-mentioned heavy-metal contaminated soil, it is preferred that the filter plate is by porous sintered glass structure
Into the thickness of the porous sintered glass is 2mm~5mm, and the aperture of the porous sintered glass is 0.05mm~0.5mm.
In the electro reclamation device of above-mentioned heavy-metal contaminated soil, it is preferred that load type active carbon in the composite filter plate
The thickness of filter paper be 0.4mm~0.6mm, the aperture of the filter paper of the load type active carbon is 1 μm~10 μm, the activated carbon
Load capacity is 10mg/cm2~50mg/cm2；The thickness of porous sintered glass is 3mm~8mm in the composite filter plate, porous sintered
The aperture of glass is 0.01mm~0.2mm.
In the electro reclamation device of above-mentioned heavy-metal contaminated soil, it is preferred that the pulse width of the square wave pulse voltage
It is+0.5V/cm~+2V/cm to be worth, and pulsewidth is 2s~4s, and the pulse period is 2s~8s.
Used as a total technology design, the present invention also provides a kind of electric repair method of heavy-metal contaminated soil, wraps
Include following steps：
(1) by heavy-metal contaminated soil after air-drying, sieving, regulation moisture content is pre-processed to 25%~35%
Heavy-metal contaminated soil；
(2) heavy-metal contaminated soil that will be pre-processed loads the de- of the electro reclamation device of above-mentioned heavy-metal contaminated soil
In contaminated area, then compacting runs the electro reclamation device of the heavy-metal contaminated soil, to the heavy-metal contaminated soil for pre-processing
Repaired, after the completion of reparation, reclaimed the flocculate produced in the cathodic region.
In the electric repair method of above-mentioned heavy-metal contaminated soil, it is preferred that in the step (1), the heavy metal
It is 5%~10% that contaminated soil is air-dried to moisture content, and the sieve diameter of the sieving is 2mm~4mm；
And/or, in the step (2), the density after the heavy-metal contaminated soil compacting of the pretreatment is 2000g/cm3
~5000g/cm3；Maximum current≤the 0.2mA of the reparation, the nutrition is supplemented in the repair process to the anode region
Liquid, the magnitude of recruitment of the nutrient solution is 10L/ days/m3Detoxification area~25L/ days/m3Detoxification area (the supplement of nutrient solution i.e. in anode region
Amount is related to detoxification area volume), the time of the reparation is 3~7 days；The flocculate is the sediment containing aluminium and heavy metal.
In the electric repair method of above-mentioned heavy-metal contaminated soil, it is preferred that the weight in the heavy-metal contaminated soil
Metal includes at least one in cadmium, lead, zinc and copper, and the soil in the heavy-metal contaminated soil is clay and/or silt.
Compared with prior art, the advantage of the invention is that：
1st, in the electro reclamation device of heavy-metal contaminated soil of the invention, the composite filter plate of supported active charcoal filter paper is de-
An electric microfield is formd between contaminated area and cathodic region, migration velocity of the heavy metal ion from detoxification area to cathodic region is accelerated；
Simultaneously as the generation of electric microfield can build an acidic atmosphere between detoxification area and cathodic region, so as to solve traditional electricity
Dynamic neutral and alkali band of repairing is migrated to detoxification area from cathodic region so that powered heavy metal ion precipitates and cannot continue the difficulty for migrating
Topic.The addition of anode nutrient solution not only significantly improves the electrokinetic remediation efficiency of heavy-metal contaminated soil, while solving tradition
The problem of soil nutrient impoverishment caused by electro reclamation.The use of square wave pulse voltage is significantly reduced during electro reclamation
Power consumption, is that its commercial applications is laid a good foundation.
2nd, the electric repair method of heavy-metal contaminated soil of the invention, with realizing that detoxification area heavy metal in soil removes
And in the solution of cathodic region synchronous flocculation sediment and the advantage of recovery, without supporting follow-up waste water disposal facility, save this
The operating cost of technology.Additionally, the method uses electric current as the Judging index for repairing terminal, substitution is contained with heavy metal in soil
Measure as Judging index, thus with more practical application operability.
Brief description of the drawings
Fig. 1 is the electro reclamation apparatus structure schematic diagram of the heavy-metal contaminated soil of the embodiment of the present invention 1.
Fig. 2 is supported catalyst in the electro reclamation device anode region of the heavy-metal contaminated soil of the embodiment of the present invention 1
The electron microscope of titanium-based material.
Fig. 3 is the schematic diagram of square wave pulse voltage in the embodiment of the present invention 1.
Fig. 4 is the energy spectrum diagram of the flocculate of cathodic region generation in the embodiment of the present invention 2.
Marginal data：
1st, anode region pole plate；2nd, filter plate；3rd, detoxification area；4th, composite filter plate；5th, cathodic region pole plate；6th, flocculate；7th, power supply；
8th, anode region；9th, cathodic region；10th, the filter paper of load type active carbon；11st, body.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
Material and instrument employed in following examples are commercially available.
Embodiment 1：
A kind of electro reclamation device of heavy-metal contaminated soil of the invention, as shown in figure 1, the electro reclamation device includes
Anode region 8, detoxification area 3 and cathodic region 9 are disposed with power supply 7 and body 11, body 11, between anode region 8 and detoxification area 3
Fine particle is reversely migrated to the filter plate 2 of anode region 8 in being provided with for preventing detoxification area 3, is set between detoxification area 3 and cathodic region 9
There is the composite filter plate 4 for building electric microfield and acidic atmosphere simultaneously, accelerate heavy metal ion from detoxification area 3 to cathodic region 9
Migration velocity, while preventing heavy metal from being precipitated in detoxification area 3.Anode region 8 is connected with the positive pole of power supply 7, cathodic region 9 and power supply 7
Negative pole be connected.
In the present embodiment, anode region 8 is made up of (nutrient solution omits show in Fig. 1) anode region pole plate 1 and nutrient solution, sun
The part of polar region pole plate 1 is dipped in nutrient solution, and anode region pole plate 1 is connected with the positive pole of power supply 7.Anode region pole plate 1 is by supported catalyst
The titanium-based material of agent is constituted, and Fig. 2 is the SEM figures of the titanium-based material of supported catalyst, and titanium-based material is titanium plate, the mass fraction of titanium in titanium plate
It is 91%, 87%~99%, catalyst is ruthenic oxide, load capacity of the ruthenic oxide in titanium plate is 0.4mg/cm2,
0.4mg/cm2~0.8mg/cm2.Nutrient solution used volume is 196mL (generally the 2/3 of anode region volume), magnitude of recruitment
It is 20L/ days/m3The volume in detoxification area, each component and addition are as follows：0.4mol/L humic acid, 0.2mol/L citric acids,
0.07mol/L potassium nitrate.In the present invention, the composition of nutrient solution can be implemented as follows：0.2mol/L~0.4mol/L humic acid,
0.1mol/L~0.3mol/L citric acids and 0.05mol/L~0.1mol/L potassium nitrate.
Cathodic region 9 is made up of (buffer solution omits show in Fig. 1) cathodic region pole plate 5 and buffer solution, 5, cathodic region pole plate
In buffer solution, cathodic region pole plate 5 is connected sub-dip with the negative pole of power supply 7.Cathodic region pole plate 5 is made up of aluminum, and aluminum is
1050 type aluminium sheets, the mass fraction of aluminium is 94%, 92%~99% in aluminium sheet.Buffer solution used is kaliumphosphate buffer,
The volume of kaliumphosphate buffer be 196mL (generally the 2/3 of cathodic region volume), constitute for 1.39mol/L potassium phosphate,monobasics,
3.61mol/L potassium dihydrogen phosphates, pH is 6.4,6~9.
In the present embodiment, filter plate 2 is made up of porous sintered glass, and the thickness of the porous sintered glass is 3mm, 2mm~5mm
, the aperture of the porous sintered glass is 0.05mm, 0.05mm~0.5mm.
In the present embodiment, composite filter plate 4 is stacked and constituted by the filter paper 10 and porous sintered glass of load type active carbon, and load is lived
Property charcoal filter paper 10 near the side of detoxification area 3, i.e. load type active carbon filter paper 10 located at detoxification area 3 it is porous with composite filter plate 4
Between sintered glass.The thickness of the filter paper 10 of load type active carbon is 0.5mm, 0.4mm~0.6mm, the filter of load type active carbon
The aperture of paper 10 is 2 μm, and 1 μm~10 μm, the load capacity of activated carbon is 20mg/cm2, 10mg/cm2~50mg/cm2.
The porous sintered thickness of glass of composite filter plate 4 is 4mm, 3mm~8mm, and the aperture of the porous sintered glass of composite filter plate 4 is
0.1mm, 0.01mm~0.2mm.
In the present embodiment, power supply 7 is programmable DC power supply, model RIGOL DP1116A, programmable DC power supply tool
Have electric current viewing area, electric current can be shown, there is provided voltage be square wave pulse voltage.As shown in figure 3, square wave pulse voltage
Pulse amplitude is+1V/cm, and voltage pulse width B is 2s, and voltage pulse periods T is 4s.In the present invention, the pulse of square wave pulse voltage
Amplitude is+0.5V/cm~+2V/cm, and pulsewidth is 2s~4s, and the pulse period is 2s~8s.
In the present embodiment, the * long a height of 60mm*70mm*70mm of * wide of cuboidal anode region 8, titanium plate in anode region 8
The a height of 2mm*60mm*90mm of * * wide long.* long * wide a height of 3mm*80mm*80mm of cuboidal filter plate 2, i.e., it is square porous sintered
The longitudinal section size of glass is 80mm*80mm, and thickness is 3mm, and mean pore size is 0.05mm.The detoxification area 3 of cylinder
Longitudinal section is circle, and a diameter of 70mm, total length is 120mm.The a height of 4.5mm* of * long * wide of cuboidal composite filter plate 4
80mm*80mm, the longitudinal section size of porous sintered glass is 80mm*80mm in composite filter plate 4, and thickness is 4mm, and average pore size is big
Small is 0.1mm, and the thickness of the filter paper 10 of load type active carbon is 0.5mm, and pore size is 2 μm, and the load capacity of activated carbon is 20mg/
cm2.The * long a height of 60mm*70mm*70mm of * wide in cuboidal cathodic region 9, the * long * wide of 1050 type aluminium sheets are a height of in cathodic region 9
2mm*60mm*90mm。
Embodiment 2
A kind of electric repair method of heavy-metal contaminated soil of the invention, can be using the heavy metal polluted soil of embodiment 1
The electro reclamation device of earth is implemented, and the electric repair method is comprised the following steps：
(1) it is heavy metal polluted soil to be repaired to pick up from Certain District, Hunan by the clayed soil (clay) of heavy metal pollution
Earth, wherein containing cadmium (Cd) 100mg/kg, full nitrogen 0.21g/kg, full phosphorus 0.13g/kg, full potassium 2.3g/kg, moisture content 32%, will treat
The heavy-metal contaminated soil of reparation air-dry to moisture content be 8%, then sieve, sieve diameter is 3mm, then adjust moisture content to
26%, the heavy-metal contaminated soil for being pre-processed.
(2) heavy-metal contaminated soil of the pretreatment for obtaining step (1) loads the de- of the electro reclamation device of embodiment 1
In contaminated area 3, and it is 3000g/cm to be densified to the density of heavy-metal contaminated soil3, it is then turned on the electro reclamation dress in embodiment 1
Put, monitor the curent change in its loop, maximum current≤0.2mA, while in the (nutrition in embodiment 1 of anode Additional nutrient solution
Liquid), 9.2mL/d.When its loop current is less than 0.2mA after running 5 days, operation stopping device.Show going for cadmium after analysis
Except rate is 94.32%, while reclaiming the flocculate 6 containing aluminium and cadmium, the power spectrum characterization result of flocculate 6 is shown in Fig. 4 and table 1.
The content of each component in the flocculate of table 1
| Element | Mass ratio % | Mol ratio % |
| Carbon C | 9.18 | 26.28 |
| Nitrogen N | 0.92 | 2.24 |
| Oxygen O | 4.01 | 8.62 |
| Aluminium Al | 24.54 | 31.21 |
| Phosphorus P | 9.7 | 10.74 |
| Sulphur S | 6.68 | 7.17 |
| Cadmium Cd | 44.97 | 13.74 |
Electro reclamation device and electric repair method the following is heavy-metal contaminated soil of the invention contrast other methods
And its treatment effect analysis of the device to the clayed soil by cadmium pollution.
Comparative example 1
The electro reclamation device of this comparative example 1 is substantially the same manner as Example 1, differs only in：Filter paper in composite filter plate
Not load type active carbon.Comparative example 1 processes heavy-metal contaminated soil according to the method for embodiment 2.
Comparative example 2
The electro reclamation device of this comparative example 2 is substantially the same manner as Example 1, differs only in：Nutrient solution in anode region
It is clear water.Comparative example 2 processes heavy-metal contaminated soil according to the method for embodiment 2.
Comparative example 3
The electro reclamation device of this comparative example 3 is substantially the same manner as Example 1, differs only in：Power supply provide voltage be
Constant voltage, rather than square-pulse voltage.Comparative example 3 processes heavy-metal contaminated soil according to the method for embodiment 2.
As shown in table 2, the treatment effect of heavy metal contaminated soil is different under different prosthetic devices.
Heavy-metal contaminated soil index comparing result under the different prosthetic devices of table 2
Filter paper in the composite filter plate of comparative example 1 is not 40.46% to Cd removal efficiency after load type active carbon, compared to
Embodiment 1~2, Cd removal efficiency have dropped 53.86%.Result shows that the composite filter plate 4 containing supported active charcoal filter paper is in detoxification
An electric microfield is formd between area 3 and cathodic region 9, while an acidic atmosphere has been built, so as to solve alkalescence band migration
Problem, improves the removal efficiency of heavy metal Cd.
The nutrient solution of comparative example 2 replaces with clear water, is 80.54%, the content of Nutrient Elements in Soil to Cd removal efficiency
Respectively：The full nitrogen of 0.08g/kg, the full phosphorus of 0.11g/kg, the full potassium of 1.2g/kg.Compared to embodiment 1~2, Cd removal efficiency and
The full nitrogen of nutrient, full phosphorus, full potassium content are remarkably decreased.Result shows that the addition of anode nutrient solution not only significantly improves weight
The electrokinetic remediation efficiency of metallic pollution soil, while solving the problems, such as that soil nutrient elements are lost in caused by electro reclamation.
The square-pulse voltage of comparative example 3 replaces with constant voltage, is 0.024kW.h to power consumption.Compared to implementation
Example 1~2, the consumption to electric energy improves 118%.Result shows that the use of square wave pulse voltage significantly reduces electro reclamation
During power consumption.
The above, is only presently preferred embodiments of the present invention, and any formal limitation is not made to the present invention.Though
So the present invention is disclosed as above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, in the case where Spirit Essence of the invention and technical scheme is not departed from, all using in the methods and techniques of the disclosure above
Appearance makes many possible variations and modification, or the Equivalent embodiments for being revised as equivalent variations to technical solution of the present invention.Therefore,
Every content without departing from technical solution of the present invention, according to technical spirit of the invention to made for any of the above embodiments any simple
Modification, equivalent, equivalence changes and modification, still fall within the range of technical solution of the present invention protection.
Claims (10)
1. the electro reclamation device of a kind of heavy-metal contaminated soil, it is characterised in that the electro reclamation device includes power supply (7)
With body (11), anode region (8), detoxification area (3) and cathodic region (9), the anode region are disposed with the body (11)
(8) filter plate (2) is provided between the detoxification area (3), composite filter is provided between the detoxification area (3) and the cathodic region (9)
Plate (4), the anode region (8) is connected with the positive pole of power supply (7), and the cathodic region (9) is connected with the negative pole of power supply (7)；
The anode region (8) is made up of anode region pole plate (1) and nutrient solution, and the cathodic region (9) is gentle by cathodic region pole plate (5)
Fliud flushing is constituted, and the composite filter plate (4) is stacked and constituted by the filter paper (10) of load type active carbon and porous sintered glass, the load
The filter paper (10) of activated carbon is near detoxification area (3) side；
The power supply (7) is programmable DC power supply, and the programmable DC power supply has electric current viewing area, described programmable
The voltage that dc source is provided is square wave pulse voltage.
2. the electro reclamation device of heavy-metal contaminated soil according to claim 1, it is characterised in that the anode region pole
Plate (1) is made up of the titanium-based material of supported catalyst, the titanium-based material be titanium plate, in the titanium plate mass fraction of titanium be 87%~
99%, the catalyst is ruthenic oxide, and the load capacity of the catalyst is 0.4mg/cm2~0.8mg/cm2；The anode region
Pole plate (1) is connected with the positive pole of power supply (7), and the anode region pole plate (1) is partly dipped in nutrient solution.
3. the electro reclamation device of heavy-metal contaminated soil according to claim 1, it is characterised in that the cathodic region pole
Plate (5) is made up of aluminum, and the aluminum is aluminium sheet, and the mass fraction of aluminium is 92%~99% in the aluminium sheet；Described the moon
Polar region pole plate (5) is connected with the negative pole of power supply (7), and the cathodic region pole plate (5) is partly dipped in buffer solution.
4. the electro reclamation device of heavy-metal contaminated soil according to claim 1, it is characterised in that the nutrient solution by
Following components is constituted：0.2mol/L~0.4mol/L humic acid, 0.1mol/L~0.3mol/L citric acids and 0.05mol/L~
0.1mol/L potassium nitrate；And/or, the buffer solution is kaliumphosphate buffer, and the pH value of the buffer solution is 6~9.
5. the electro reclamation device of the heavy-metal contaminated soil according to any one of Claims 1 to 4, it is characterised in that
The filter plate (2) is made up of porous sintered glass, and the thickness of the porous sintered glass is 2mm~5mm, the porous sintered glass
The aperture of glass is 0.05mm~0.5mm.
6. the electro reclamation device of the heavy-metal contaminated soil according to any one of Claims 1 to 4, it is characterised in that
The thickness of the filter paper (10) of load type active carbon is 0.4mm~0.6mm, the filter of the load type active carbon in the composite filter plate (4)
The aperture of paper (10) is 1 μm~10 μm, and the load capacity of the activated carbon is 10mg/cm2~50mg/cm2；The composite filter plate (4)
In the thickness of porous sintered glass be 3mm~8mm, the aperture of porous sintered glass is 0.01mm~0.2mm.
7. the electro reclamation device of the heavy-metal contaminated soil according to any one of Claims 1 to 4, it is characterised in that
The pulse amplitude of the square wave pulse voltage is+0.5V/cm~+2V/cm, and pulsewidth is 2s~4s, and the pulse period is 2s~8s.
8. a kind of electric repair method of heavy-metal contaminated soil, comprises the following steps：
(1) by heavy-metal contaminated soil after air-drying, sieving, regulation moisture content to 25%~35%, the huge sum of money for being pre-processed
Category contaminated soil；
(2) heavy-metal contaminated soil that will be pre-processed loads the heavy-metal contaminated soil any one of claim 1~7
In the detoxification area (3) of electro reclamation device, then compacting runs the electro reclamation device of the heavy-metal contaminated soil, to pre-
The heavy-metal contaminated soil for the treatment of is repaired, and after the completion of reparation, reclaims the flocculate (6) produced in the cathodic region (9).
9. the electric repair method of heavy-metal contaminated soil according to claim 8, it is characterised in that the step (1)
In, it is 5%~10% that the heavy-metal contaminated soil is air-dried to moisture content, and the sieve diameter of the sieving is 2mm~4mm；
And/or, in the step (2), the density after the heavy-metal contaminated soil compacting of the pretreatment is 2000g/cm3~
5000g/cm3；Maximum current≤the 0.2mA of the reparation, the nutrition is supplemented in the repair process to the anode region (8)
Liquid, the magnitude of recruitment of the nutrient solution is 10L/ days/m3Detoxification area~25L/ days/m3Detoxification area, the time of the reparation is 3~7
My god；The flocculate (6) is the sediment containing aluminium and heavy metal.
10. the electric repair method of heavy-metal contaminated soil according to claim 8 or claim 9, it is characterised in that the huge sum of money
Heavy metal in category contaminated soil includes at least one in cadmium, lead, zinc and copper, and the soil in the heavy-metal contaminated soil is
Clay and/or silt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710295059.1A CN106914486B (en) | 2017-04-28 | 2017-04-28 | Electric remediation device and electric remediation method for heavy metal contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710295059.1A CN106914486B (en) | 2017-04-28 | 2017-04-28 | Electric remediation device and electric remediation method for heavy metal contaminated soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106914486A true CN106914486A (en) | 2017-07-04 |
| CN106914486B CN106914486B (en) | 2020-04-03 |
Family
ID=59568419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710295059.1A Active CN106914486B (en) | 2017-04-28 | 2017-04-28 | Electric remediation device and electric remediation method for heavy metal contaminated soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106914486B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107377612A (en) * | 2017-08-30 | 2017-11-24 | 清华大学 | A kind of method that electronic resistance heating in original position cooperates with repairing polluted soil and underground water |
| CN108865880A (en) * | 2018-06-25 | 2018-11-23 | 中南林业科技大学 | A kind of screening has the device and method of the electric heavy metal resistance microorganism for moving ability |
| CN112264450A (en) * | 2020-09-23 | 2021-01-26 | 天津大学 | Device applied to simulating low-permeability soil electrokinetic remediation and using method |
| CN113231460A (en) * | 2021-05-31 | 2021-08-10 | 中南林业科技大学 | Three-dimensional electric restoration device and method for polluted soil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201454977U (en) * | 2009-04-28 | 2010-05-12 | 上海海事大学 | Electrokinetic adsorbing and compounding remediation device for heavy metal polluted soil |
| CN101838740A (en) * | 2010-04-09 | 2010-09-22 | 中钢集团武汉安全环保研究院有限公司 | Method for removing soluble heavy metal ions in situ |
| CN203370805U (en) * | 2013-07-25 | 2014-01-01 | 江苏上田环境修复有限公司 | Improved in-situ repairing device for polluted soil |
| CN104174648A (en) * | 2014-08-21 | 2014-12-03 | 中国科学院生态环境研究中心 | Method for repairing heavy metal polluted soil and special equipment thereof |
| CN204276511U (en) * | 2014-12-02 | 2015-04-22 | 南京工程学院 | A kind of prosthetic device of heavy-metal contaminated soil |
-
2017
- 2017-04-28 CN CN201710295059.1A patent/CN106914486B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201454977U (en) * | 2009-04-28 | 2010-05-12 | 上海海事大学 | Electrokinetic adsorbing and compounding remediation device for heavy metal polluted soil |
| CN101838740A (en) * | 2010-04-09 | 2010-09-22 | 中钢集团武汉安全环保研究院有限公司 | Method for removing soluble heavy metal ions in situ |
| CN203370805U (en) * | 2013-07-25 | 2014-01-01 | 江苏上田环境修复有限公司 | Improved in-situ repairing device for polluted soil |
| CN104174648A (en) * | 2014-08-21 | 2014-12-03 | 中国科学院生态环境研究中心 | Method for repairing heavy metal polluted soil and special equipment thereof |
| CN204276511U (en) * | 2014-12-02 | 2015-04-22 | 南京工程学院 | A kind of prosthetic device of heavy-metal contaminated soil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107377612A (en) * | 2017-08-30 | 2017-11-24 | 清华大学 | A kind of method that electronic resistance heating in original position cooperates with repairing polluted soil and underground water |
| CN108865880A (en) * | 2018-06-25 | 2018-11-23 | 中南林业科技大学 | A kind of screening has the device and method of the electric heavy metal resistance microorganism for moving ability |
| CN112264450A (en) * | 2020-09-23 | 2021-01-26 | 天津大学 | Device applied to simulating low-permeability soil electrokinetic remediation and using method |
| CN113231460A (en) * | 2021-05-31 | 2021-08-10 | 中南林业科技大学 | Three-dimensional electric restoration device and method for polluted soil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106914486B (en) | 2020-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106914486A (en) | The electro reclamation device and electric repair method of heavy-metal contaminated soil | |
| CN201454977U (en) | Electrokinetic adsorbing and compounding remediation device for heavy metal polluted soil | |
| CN104174648B (en) | A kind of method of restoration of soil polluted by heavy metal and special equipment thereof | |
| CN201511037U (en) | Electric plant composite heavy metal pollution soil restoration device | |
| CN201454978U (en) | Heavy metal polluted soil electrokinetic adsorbing and compounding remediation device for plants | |
| CN107900095B (en) | Self-generating current-rising wetland polluted soil remediation device and remediation method | |
| CN110420983B (en) | Method and system for combined leaching, adsorption and electrokinetic remediation of heavy metal contaminated soil | |
| CN102500610A (en) | Electrodynamic and drop-irrigation combined heavy-metal-polluted soil remediation method | |
| CN102503059B (en) | Method for removing heavy metal from sludge and device thereof | |
| CN105665437A (en) | Device for repairing polluted soil by using electric power | |
| CN201511038U (en) | Electromotive power chromium pollution soil restoration device | |
| CN110369485A (en) | A kind of electronic-permeable reactive barrier combined remediation method of heavy-metal contaminated soil | |
| CN107185957A (en) | A kind of soil repair system of quick improvement soil organic matter and heavy metal | |
| CN207325582U (en) | A kind of electric power soil repair system based on solar energy | |
| CN109719122A (en) | The processing method and processing device of heavy metal ion in a kind of removal soil (water body) with adsorbent | |
| CN103962372A (en) | Device and method for repairing caesium contaminated soil with cathode approximation method | |
| CN103736718A (en) | Electrokinetic remediation method and device of heavy metal contaminated soil | |
| CN111054741A (en) | Method and device for repairing heavy metal-organic matter combined polluted soil by electric-leaching combined technology | |
| CN112676336A (en) | Method for repairing heavy metal contaminated soil by using primary battery driving technology | |
| CN106630116B (en) | Method for strengthening microbial electrochemical denitrification and large cathode chamber continuous flow bioelectrochemical reaction device | |
| CN206901979U (en) | A kind of device of electronic permeable reactive wall and artificial swamp coupling treatment of sewage water | |
| CN106424117A (en) | Device for electro-kinetic remediation of heavy metal contaminated soil by utilizing copper salt reinforced cathode | |
| CN107377608A (en) | It is a kind of efficiently to remove Cr in acid soil6+Microbial fuel cell unit and method | |
| CN104959378B (en) | A kind of bipolar membrane electrolytic cell of removable heavy metal in soil cation | |
| CN106986501A (en) | A kind of method and device of electronic permeable reactive wall and artificial swamp coupling treatment of sewage water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |