CN105903758B - The system and application method of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal - Google Patents
The system and application method of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal Download PDFInfo
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- CN105903758B CN105903758B CN201610356259.9A CN201610356259A CN105903758B CN 105903758 B CN105903758 B CN 105903758B CN 201610356259 A CN201610356259 A CN 201610356259A CN 105903758 B CN105903758 B CN 105903758B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The system and application method of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal, it is related to the system and application method of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal.The purpose of the present invention is to solve the administering method of existing heavy metal pollution of soil, there are cost is higher and administer period longer problem.The system includes solar energy photovoltaic generator, soda acid control device and cathode fluid circulation.Positive and negative electrode is installed in heavy-metal contaminated soil first, positive and negative electrode is that carbon fiber is made, electric current is formed using solar cell module, it is directed to pH value in soil later and divides processing band, dialysis tube is embedded in quasi- improvement soil, heavy metal relies in electrokinetic migration action to cathode solution, after heavy metal removal in catholyte, by treated, solution injects anode, realizes the cycle of solution.The present invention has the advantages that at low cost, the period is short.The present invention is applied to soil remediation field.
Description
Technical field
The present invention relates to a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal and users
Method.
Background technology
It is total to be accounted for about arable land by nearly 20,000,000 hectares of the cultivated area of the heavy metal pollutions such as cadmium, arsenic, copper, chromium, copper for China at present
The 1/5 of area.For Soil Environmental Pollution once occurring, the method for relying solely on cut-out pollution sources is difficult often self-recovery, it is necessary to
Real pollution problem could be solved using various effective Treatment process.Due to the harmfulness and particularity of heavy metal pollution, weight
Oneself warp of the recovery technique of metallic pollution soil becomes one of the research hotspot in global environment scientific and engineering field.Oneself sends out both at home and abroad
It opens up a variety of heavy metal pollution of soil Treatment process, such as phytoremediation, chemical extraction, immobilization, applies modifying agent, hot repair
The technologies such as multiple, gas phase extracting, microorganism remediation, electric power, the combination of more technologies.
Compared with other technologies, electrokinetics have its unique advantage in terms of metallic pollution reparation：
(1) compared with excavating, soil rinses isotonic technology, electrokinetics can in-situ treatment contaminated soil, it is maximum
Degree soil protection upper layer building structure；
(2) pH of original ingredient makes metal ion activation in electrokinetics change soil, does not interfere in soil
Other compositions, and the process is not influenced by soil hypotonicity；
(3) different from chemical stabilization, metal ion is fundamentally removed rather than leads to completely in electrokinetics
Cross the new substance that induces one into soil is combined generation sediment to realize with metal ion；
(4) for being unable to the scene of in-situ immobilization, the method that showering may be used；
It (5) may be all effective to zone of saturation and unsaturated layer；
(6) the high soil of the relatively low especially firewood soil content of hydraulic conductivity is with strong applicability；
(7) all effective to organic and inorganic pollution.
Upper in application, there are some limiting factors for existing electrokinetics:(1) dissolubility and pollutant of pollutant
The successful application of the technology is had a major impact from the desorption performance of soil colloids；(2) soil moisture content is less than 10%
Occasion, treatment effect substantially reduce；(3) processing procedure needs additional electric energy, causes energy expenditure；(4) electrokinetic process process is cloudy
Pole and anode will appear alkali area and sour area, seriously affect the treatment effect of soil.
Application No. is CN201520553410.9 provide it is a kind of administer metallic pollution soil system, including dialysis tube,
Pipe fitting, water-supply-pipe, water source, analysis salt plug and processing equipment, dialysis tube embedment is quasi- administer in soil and by pipe fitting and water-supply-pipe with
Water source is connected to form water supply network, to be formed using dialysis tube as the cylindrical wetting body in axle center after first preset time that supplies water
And adjacent two wetting body is crossed to form the intersection area of metal ion enrichment；It analyses salt plug lower half and is inserted into intersection area and the first half
It is exposed to ground, with after continuing the second preset time, the soil liquid is constantly drawn in salt plug lower half and moisture is logical by analysing
It crosses the analysis salt plug first half constantly to evaporate so that metal ion is enriched in analysis salt plug；Processing equipment, for removing in analysis salt plug
Metal ion and carry out subsequent processing, to realize to the quasi- processing for administering Metal Pollution Study In Soils.This method is by external environment
Condition influences greatly, and the implementation cycle is long.
A kind of electrodynamics is provided combines trickle irrigation restoration of soil polluted by heavy metal application No. is CN201210000964.7
Method.This method is to install positive and negative electrode at heavy-metal contaminated soil both ends, and positive and negative electrode is that carbon fiber is made, in positive negative electricity
Adsorbent is placed between pole and contaminated soil respectively, drip irrigation appliance is arranged in the top of soil near adsorbent, by electrolyte, buffering
Liquid or complexing agent etc. are slowly dropped in the contaminated soil of both sides, carry out periodical anode and cathode polarity switching to electrode, heavy metal relies on
Electrokinetic migration action simultaneously is adsorbed by adsorbent to reduce its concentration in the soil.This method energy consumption is big, and does not examine
The pH value considered in processing procedure in different zones soil is different.In the various factors for influencing treatment effect, control soil acid
Basicity is extremely important.PH can change the chemical state of pollutant, thus it is possible to vary the size and Orientation of electroosmotic flow influences soil hole
The cross-haul traffic of gap pollutant with polarizing electrode and can reduce the validity of DC electric field.Electric power processing at present is heavy metal-polluted
The experiment of dye, to ensure that preferable treatment effect, the voltage provided about 1v/cm, electric current are about 10mA, large-scale application processing soil
When earth, energy consumption is high.
The administering method of current existing heavy metal pollution of soil, there are cost is higher and administer period longer problem.
Therefore, more advanced, more effective and more economic contaminated soil remediation is studied, every technology and method quarter of improvement is not allowed
It is slow.
Invention content
The purpose of the present invention is to solve the administering method of existing heavy metal pollution of soil, there are cost is higher and control
Period longer problem is managed, system and the use of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal are provided
Method.
The system of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal of the invention, it is characterised in that should
System includes solar energy photovoltaic generator, soda acid control device and cathode fluid circulation, solar energy photovoltaic generator and
Cathode fluid circulation is located at the upper left corner of the system, and soda acid control device is located at the upper right corner of the system；The wherein acid
Alkali control device includes acid solution case, lye tank and dialysis tube, and acid solution case side is connected to acid delivering tube, lye tank side and base-conveying pipe
Connection, acid delivering tube and base-conveying pipe are connected to by acid-base accommodation valve with acidic and alkaline liquid conveying pipe, and acidic and alkaline liquid conveying pipe is connected to dialysis tube；Too
Positive energy photovoltaic power generation apparatus includes solar components, anode tube and cathode tube；Wherein anode tube is internally provided with anolyte and anode,
Cathode tube is internally provided with catholyte and cathode, and solar components are connected to by positive wire with the anode in anode tube, and are passed through
Cathode wire is connected to the cathode in cathode tube；Cathode fluid circulation is connected by input pipe with the catholyte in cathode tube,
It is connected with the anolyte in anode tube by efferent duct.
A kind of application method of the system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal of the invention,
It is characterized in that this method is：Selected pending soil region, anode tube is alternately arranged in the soil in pending soil area
And cathode tube, it is that different soda acids handles band by pending soil region division, note dialysis tube is squeezed at different soda acids
In the soil for managing band, dialysis tube is connected to acidic and alkaline liquid conveying pipe, is reached 5 ± 0.2 further according to the pH value of final soil, is calculated injection
Soda acid flow；It is then turned on system, the heavy metal ion in soil enters under the action of cathode and anode in catholyte, cathode
Liquid enters cathode fluid circulation by input pipe, and heavy metal ion is recycled in cathode fluid circulation, obtains that treated
Solution, treated, and solution enters anolyte by water circulating pump, that is, completes.
Solar energy photovoltaic generator includes solar cell module, controller, accumulator and carbon-point.Pass through solar-electricity
Pond component via controller, converts solar energy into electrical energy and is stored in accumulator, by importing electric energy using carbon-point as electrode
In soil, by electrode as soil inside, it is fabricated to multiple positive electrodes and negative electrode according to demand, there are many choosings for electrode arrangement
It selects, the migration of metal ion is driven by the electric field of formation.
Soda acid control device includes that soda acid control device includes acid solution case, lye tank and dialysis tube.In processing procedure, soil
PH value changes with the different location apart from electrode in earth, and different processing bands is divided into according to pH value.Utilize pumping of drawing water
Take the acid & alkali liquid configured.Dialysis tube is the pipe that tube wall is covered with micropore.Dialysis tube is to be embedded in quasi- improvement soil and pass through pipe fitting
And acidic and alkaline liquid conveying pipe is connected with acid solution case, lye tank to form water supply network, is formed using every dialysis tube as the cylinder in axle center
Wetting body and adjacent two wetting body are crossed to form the intersection area of metal ion enrichment, wherein the water (flow) direction in wetting body is
From cylindrical axle center to cylindrical sides, it is added dropwise in specifically processing band by dialysis tube, adjusts the region to optimal pH, make
It obtains metal ion and is utmostly in free state.
After handling a period of time, catholyte is flowed into cathode fluid circulation, heavy metal recovery in solution is realized, will handle
Solution afterwards sends anolyte back to by water circulating pump, realizes recycling for electrode liquid.
Entire heavy metal pollution of soil governing system is made of above three main device, is filled by solar energy power generating
Offer electric energy is provided, passes through the optimization process effect that soda acid control device realizes metal ion, last cathode fluid circulation later
Realize that heavy metal detaches and the cycle of solution from soil.
Beneficial effects of the present invention：
Compared with the prior art scheme, the present invention has the following advantages：
(1) photovoltaic technology is utilized, the energy consumption in processing procedure, good economy performance are substantially reduced.
(2) electrode arrangement uses alternating expression, is conducive to the migration of heavy metal contaminants.
(3) dialysis tube is used.According to the difference of different location acid-base property, PH is targetedly adjusted, is made in processing procedure
Soil remains at optimal pH everywhere, substantially increases the dissolubility and desorption property of pollutant, while ensure that containing for soil
Water rate improves treatment effect.
(4) discharge technology and soda acid control technique can further speed reaction, and it is short to administer the period.
Description of the drawings
Fig. 1 is the system schematic of photovoltaic technology combination of the present invention subregion dialysis restoration of soil polluted by heavy metal；
Fig. 2 is the cathode tube and anode tube layout viewing of embodiment 1.
Specific implementation mode
Technical solution of the present invention is not limited to the specific implementation mode of act set forth below, further include each specific implementation mode it
Between arbitrary combination.
Specific implementation mode one：A kind of present embodiment photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal
System include solar energy photovoltaic generator, soda acid control device and cathode fluid circulation 1, solar energy photovoltaic generator
It is located at the upper left corner of the system with cathode fluid circulation 1, soda acid control device is located at the upper right corner of the system；Wherein described
Soda acid control device includes acid solution case 2, lye tank 16 and dialysis tube 14, and 2 side of acid solution case is connected to acid delivering tube 11, lye tank 16
Side is connected to base-conveying pipe 12, acid delivering tube 11 and base-conveying pipe 12 are connected to by acid-base accommodation valve 13 with acidic and alkaline liquid conveying pipe 15, acid
Alkali delivery pipe 15 is connected to dialysis tube 14；Solar energy photovoltaic generator includes solar components 3, anode tube 6 and cathode tube 8；
Wherein anode tube 6 is internally provided with anolyte and anode 7, and cathode tube 8 is internally provided with catholyte and cathode 18, and solar components 3 are logical
It crosses positive wire 10 to be connected to the anode 7 in anode tube 6, and is connected to the cathode 18 in cathode tube 8 by cathode wire 9；It is cloudy
Pole fluid circulation 1 is connected by input pipe 4 with the catholyte in cathode tube 8, and the anode in efferent duct 5 and anode tube 7 is passed through
Liquid phase connects.
Solar energy photovoltaic generator includes solar cell module, controller, accumulator and carbon-point.Pass through solar-electricity
Pond component via controller, converts solar energy into electrical energy and is stored in accumulator, by importing electric energy using carbon-point as electrode
In soil, by electrode as soil inside, it is fabricated to multiple anode and cathodes according to demand, there are many selections for electrode arrangement, lead to
The electric field of formation is crossed to drive the migration of metal ion.
Soda acid control device includes that soda acid control device includes acid solution case 2, lye tank 16 and dialysis tube 14.In processing procedure
In, pH value changes with the different location apart from electrode in soil, and different processing bands is divided into according to pH value.Using drawing water
Pumping takes the acid & alkali liquid configured.Dialysis tube 14 is the pipe that tube wall is covered with micropore.Dialysis tube 14 be embedded to it is quasi- administer in soil and
It is connected to form water supply network with acid solution case 2, lye tank 16 by pipe fitting and acidic and alkaline liquid conveying pipe 15, is formed with every dialysis tube 14
For axle center cylindrical wetting body and adjacent two wetting body be crossed to form metal ion enrichment intersection area, wherein wetting body
In water (flow) direction be from cylindrical axle center to cylindrical sides, by dialysis tube 14 be added dropwise specifically processing band, adjust should
Region is to optimal pH so that metal ion is utmostly in free state.
After handling a period of time, catholyte is flowed into cathode fluid circulation 1, heavy metal recovery in solution is realized, will locate
Solution after reason sends anolyte back to by water circulating pump, realizes recycling for electrode liquid.
Entire heavy metal pollution of soil governing system is made of above three main device, is filled by solar energy power generating
Offer electric energy is provided, passes through the optimization process effect that soda acid control device realizes metal ion, last cathode fluid circulation 1 later
Realize that heavy metal detaches and the cycle of solution from soil.
Specific implementation mode two：The present embodiment is different from the first embodiment in that：Dialysis tube 14 is located at anode tube 6
Region between cathode tube 8.It is other same as the specific embodiment one.
Specific implementation mode three：The present embodiment is different from the first and the second embodiment in that：The anode tube 6,
Cathode tube 8 and dialysis tube 14 are located inside soil 17.It is other the same as one or two specific embodiments.
Specific implementation mode four：Unlike one of present embodiment and specific implementation mode one to three：The sun
Energy component 3 includes solar cell module, controller and accumulator.It is other identical as one of specific implementation mode one to three.
Specific implementation mode five：Unlike one of present embodiment and specific implementation mode one to four：Acidic and alkaline liquid conveying pipe
15 be several parallel arrangements in 17 surface of soil.It is other identical as one of specific implementation mode one to four.
Specific implementation mode six：Unlike one of present embodiment and specific implementation mode one to five：Soda acid control dress
Suction pump is equipped in setting.It is other identical as one of specific implementation mode one to five.
Specific implementation mode seven：Unlike one of present embodiment and specific implementation mode one to six：Catholyte recycles
Water circulating pump is equipped in system 1.It is other identical as one of specific implementation mode one to six.
Specific implementation mode eight：The cathode 18 unlike one of present embodiment and specific implementation mode one to seven
It is carbon-point with anode 7.It is other identical as one of specific implementation mode one to seven.
Specific implementation mode nine：The dialysis tube 14 unlike one of present embodiment and specific implementation mode one to eight
For micro- profit pipe, plastics multi-hope pipeline, porous ceramic pipe, porous metal tube, hole-opening foaming rubber tube or fibrous woven pipe.It is other
It is identical as one of specific implementation mode one to eight.
There is micropore, the aperture of the micropore is 50 every square centimeter in present embodiment on the tube wall of micro- profit pipe.
Specific implementation mode ten：A kind of present embodiment photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal
The application method of system be：Selected pending soil region, is alternately arranged in the soil 17 in pending soil region
Pending soil region division is that different soda acids handles band, note dialysis tube 14 is squeezed into not by anode tube 6 and cathode tube 8
In the soil 17 of same soda acid processing band, dialysis tube 14 is connected to acidic and alkaline liquid conveying pipe 15, reaches 5 further according to the pH value of final soil
± 0.2, calculate the soda acid flow of injection；It is then turned on system, the heavy metal ion in soil is under the action of cathode and anode
Into in catholyte, catholyte enters cathode fluid circulation 1 by input pipe 4, a recycling huge sum of money in cathode fluid circulation 1
Belong to ion, the solution that obtains that treated, treated, and solution enters anolyte by water circulating pump, that is, completes.
Compared with the prior art scheme, present embodiment has the following advantages：
(1) photovoltaic technology is utilized, the energy consumption in processing procedure, good economy performance are substantially reduced.
(2) electrode arrangement uses alternating expression, is conducive to the migration of heavy metal contaminants.
(3) dialysis tube is used.According to the difference of different location acid-base property, PH is targetedly adjusted, is made in processing procedure
Soil remains at optimal pH everywhere, substantially increases the dissolubility and desorption property of pollutant, while ensure that containing for soil
Water rate improves treatment effect.
(4) discharge technology and soda acid control technique can further speed reaction, and it is short to administer the period.
Specific implementation mode 11：Present embodiment is unlike specific implementation mode ten：It is divided into different soda acids
Processing band method be：Meet y=-0.0003x according to variation of the soil pH away from 8 distance of cathode tube3+0.019x2- 0.42x+10,
Soil pH value is calculated, wherein y is pH value, and x is distance of the soil away from cathode tube 8, and 1~3 change rate of pH value is that a soda acid is handled
Band.Other are identical as specific implementation mode ten.
Beneficial effects of the present invention are verified by following embodiment：
Embodiment 1
A kind of application method of the system of the present embodiment photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal
To select the pending soils a 5m × 5m region.According to Fig. 2 anode is alternately arranged in the soil 17 in pending soil area
Pending soil region division is that different soda acids handles band, note dialysis tube 14 is squeezed into different by pipe 6 and cathode tube 8
Soda acid is handled in the soil 17 of band, and dialysis tube 14 is connected to acidic and alkaline liquid conveying pipe 15, further according to final soil pH value reach 5 ±
0.2, calculate the soda acid flow of injection；Be then turned on system, the heavy metal ion in soil under the action of cathode and anode into
Enter in catholyte, catholyte enters cathode fluid circulation 1 by input pipe 4, and heavy metal is recycled in cathode fluid circulation 1
Ion, the solution that obtains that treated, treated, and solution enters anolyte by water circulating pump, that is, completes.
The present embodiment is divided into the method that different soda acids handles band：According to variation of the soil pH away from 8 distance of cathode tube
Meet y=-0.0003x3+0.019x2- 0.42x+10 calculates soil pH value, and wherein y is pH value, and x is soil away from cathode tube 8
Distance, 1~3 change rate of pH value are that a soda acid handles band.
After 8 hours of continuous processing, comparison before and after the processing in soil Cd and Pb content, ion concentration respectively by
1.32mg/kg and 54.34mg/kg are reduced to 1.17mg/kg and 48.86mg/kg.
By embodiment it is found that the present embodiment utilizes photovoltaic technology, the energy consumption in processing procedure, good economy performance are substantially reduced；
Electrode arrangement uses alternating expression, is conducive to the migration of heavy metal contaminants；Using dialysis tube.Not according to different location acid-base property
Together, PH is targetedly adjusted, soil in processing procedure is made to remain at optimal pH everywhere, substantially increases the molten of pollutant
Solution property and desorption property, while ensure that the moisture content of soil, improve treatment effect；Discharge technology and soda acid control technique can be into
One step speeds reaction, and it is short to administer the period.
Claims (10)
1. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal, it is characterised in that the system includes
Solar energy photovoltaic generator, soda acid control device and cathode fluid circulation (1), solar energy photovoltaic generator and catholyte
The circulatory system (1) is located at the upper left corner of the system, and soda acid control device is located at the upper right corner of the system；The wherein soda acid control
Device processed includes acid solution case (2), lye tank (16) and dialysis tube (14), and acid solution case (2) side is connected to acid delivering tube (11), lye
Case (16) side is connected to base-conveying pipe (12), and acid delivering tube (11) and base-conveying pipe (12) are defeated by acid-base accommodation valve (13) and soda acid
Pipe (15) is sent to be connected to, acidic and alkaline liquid conveying pipe (15) is connected to dialysis tube (14)；Solar energy photovoltaic generator includes solar components
(3), anode tube (6) and cathode tube (8)；Wherein anode tube (6) is internally provided with anolyte and anode (7), is set inside cathode tube (8)
There are catholyte and cathode (18), solar components (3) to be connected to the anode (7) in anode tube (6) by positive wire (10), and
It is connected to the cathode in cathode tube (8) by cathode wire (9)；Cathode fluid circulation (1) passes through input pipe (4) and cathode tube
(8) catholyte in is connected, and is connected with the anolyte in anode tube (6) by efferent duct (5).
2. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that dialysis tube (14) is located at the region between anode tube (6) and cathode tube (8).
3. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that the anode tube (6), cathode tube (8) and dialysis tube (14) are located at soil (17) inside.
4. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that the solar components (3) include solar cell module, controller and accumulator.
5. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that acidic and alkaline liquid conveying pipe (15) is several parallel arrangements in soil (17) surface.
6. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that being equipped with suction pump in soda acid control device.
7. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that being equipped with water circulating pump in cathode fluid circulation (1).
8. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 1,
It is characterized in that the cathode (18) and anode (7) is carbon-point.
9. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal as described in claim 1 makes
With method, it is characterised in that this method is：Selected pending soil region, in the soil (17) in pending soil region
It is alternately arranged anode tube (6) and cathode tube (8), is that different soda acids handles band by pending soil region division, by dialysis
Pipe (14) is squeezed into the soil (17) of different soda acid processing bands, and dialysis tube (14) is connected to acidic and alkaline liquid conveying pipe (15), further according to
The pH value of final soil is 5 ± 0.2, calculates the soda acid flow of injection；It is then turned on system, the heavy metal ion in soil is in the moon
Enter in catholyte under the action of pole and anode, catholyte enters cathode fluid circulation (1) by input pipe (4), in cathode
Heavy metal ion is recycled in fluid circulation (1), the solution that obtains that treated, treated, and solution enters sun by water circulating pump
Pole liquid, that is, complete.
10. a kind of system of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal according to claim 9
Application method, it is characterised in that the method for being divided into different soda acid processing bands is：According to soil pH away from cathode tube (8) distance
Variation meet y=-0.0003x3+0.019x2- 0.42x+10 calculates soil pH value, and wherein y is pH value, and x is soil away from cathode
The distance of (8) is managed, pH value is that 1~3 change rate is a soda acid processing band.
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| CN201610356259.9A CN105903758B (en) | 2016-05-25 | 2016-05-25 | The system and application method of a kind of photovoltaic technology combination subregion dialysis restoration of soil polluted by heavy metal |
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| CN103252344A (en) * | 2013-05-20 | 2013-08-21 | 华北电力大学 | Electrically-enhanced soil in-situ eluting and repairing device and method |
| CN103920705A (en) * | 2014-04-24 | 2014-07-16 | 华北电力大学 | Device and method for restoring uranium-polluted soil by adopting comprehensive united technology |
| CN103962372A (en) * | 2014-05-20 | 2014-08-06 | 华北电力大学 | Device and method for repairing caesium contaminated soil with cathode approximation method |
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| CN105903758A (en) | 2016-08-31 |
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