CN110125158A - A kind of method that low level elutes high-order extraction technique processing heavy metal in soil pollution - Google Patents
A kind of method that low level elutes high-order extraction technique processing heavy metal in soil pollution Download PDFInfo
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- CN110125158A CN110125158A CN201810129698.5A CN201810129698A CN110125158A CN 110125158 A CN110125158 A CN 110125158A CN 201810129698 A CN201810129698 A CN 201810129698A CN 110125158 A CN110125158 A CN 110125158A
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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
Abstract
The invention discloses a kind of methods that low level elutes high-order extraction technique processing heavy metal in soil pollution, it carries out in accordance with the following steps: construction sand wick, earth's surface is laid with clay working cushion layer, eluent pipe is set in sand drain, vacuum chimney filter is set up in the Vertical Square of working cushion layer, excavate groove, plastic film is laid on working cushion layer top, eluent pipe and the position aperture of vacuum chimney filter on the plastic film, it prepares carbon dioxide eluent and is passed through eluent pipe, control carbon dioxide flow opens the vacuum system simultaneously, it controls vacuum degree and is passed through the eluent time, control the vacuum extraction time.Lessivation carries out simultaneously with extractive process, carbon dioxide diffuses up, it can accelerate and expand the soil range to form bicarbonate, keep elution processing more abundant, and the heavy metallic salt in mellow soil layer is simultaneously by the migration of vacuum pressure, it can not migrate downward into, heavy metallic salt polluted underground water and soil can be effectively prevent.
Description
Technical field
The invention belongs to soil remediation technology fields, and in particular to a kind of low level elutes in high-order extraction technique processing soil
The method of heavy metal pollution.
Background technique
With a large amount of development and utilization of mineral resources, industrial fast development and various chemical products, pesticide and change
Fertilizer is widely used, and the pollutant containing heavy metal enters environment by all means, causes soil, especially an agricultural land soil huge sum of money
Belong to pollution to get worse.Currently, countries in the world soil, there are different degrees of pollution, Hg about 1.5 is discharged in the whole world every year on average
About 3,400,000 about 5,000,000 about 1 500 ten thousand t, Ni about 100t of t, Mn of t, Pb of × 104t, Cu.In Europe, by the farmland of heavy metal pollution
There are millions of hectares；Japan by the pollutions such as Cd, Cu, As farmland area be 7 224hm2.Current China by Cd, Hg, As,
Cultivated area about 2 000 × 104hm of Cr, Pb pollution2, the grain lost every year by heavy metal pollution about 1 000 × 104t,
Contaminated grain up to 1 200 × 104t, economic loss are at least up to 200 × 108 yuan.
Currently, countries in the world mainly include physics, chemistry, biology, agricultural to farmland soil heavy metals pollution remediation technology
Ecology and combined remediation technology etc..
Peripheral doses technology
Peripheral doses technology mainly includes engineering measure (soil moved in improve the original, soil removal and replacement and deep ploughing are digged) and thermal desorption.Engineering measure tool
Have the advantages that thorough, stable, but project amount is big, investment is high, and destructible soil structures cause soil fertility to decline, to avoid two
Secondary pollution will also focus on contaminated soil.Therefore, it is only applicable to the reparation of the serious contaminated soil of small area；Heat is de-
Attached heated to contaminated soil, has volatile heavy metal if Hg, As, Se etc. in soil from desorbing for some
A kind of method, this method simple process, but energy consumption is high, and operating cost is high, and is only applicable to volatile pollutant, the gas of desorption
Body need to collect processing.
Chemical remediation technology
Chemical remediation technology includes electro reclamation, elution technique, stabilization/solidification recovery technique.
Electro reclamation is to form electric-force gradient, heavy metal in soil pollution by applying DC voltage in contaminated soil two sides
Object is brought to electrode both ends under electric field action by way of electromigration, electroosmotic flow or electrophoresis, then carries out at centralized collection
Reason, thus cleaning soil.Clay and silt soil of this method particularly suitable for hyposmosis, can control the flowing side of pollutant
To.Currently, Pool body design, electrokinetic process and its mechanism, in terms of carried out some exploration sex works.Electricity
Dynamic reparation is a kind of based technique for in-situ remediation, can remove removing heavy metals and organic pollutant simultaneously, not stir soil layer, is easy to operate, place
It manages high-efficient, is a kind of economically viable recovery technique, but easily lead to soil physico-chemical property variation.Electrokinetic remediation efficiency may be because
Soil surface particle is adsorbed to pollutant and electrode both ends H+(anode) and OH-(cathode) aggregation is influenced and is reduced.Since soda acid can
Cause soil physico-chemical property to change, adds such as chelating agent, complexing agent, surfactant and oxidation/reduction agent (H2O2、
NaMnO4、KMnO4、 Fe0), it is allowed to form stable state and the soluble compound in pH wider range with heavy metal, passes through enhancing soil
Heavy metals mobilization achievees the purpose that efficiently to remove in earth.Research finds electric driving method removal effect is good and economic benefit height etc. is excellent
While point, there are still shortcomings, such as system acidification to lead to reverse osmosis flow phenomenon；Deposited phenomenon easily occurs in alkalinity band；Soil
In certain pollutants be difficult to parse.
Soil leaching technology is by water or the chelating agent (citric acid, EDTA, DTPA, EDDS) containing rinse aid, acid/base
Solution (H2SO4、HNO3), complexing agent (acetic acid, ammonium acetate, cyclodextrin), surfactant) (APG, SDS, SDBS, DDT, sandlwood
Glycolipid) etc. eluents be injected into contaminated soil or deposit, elution and cleaning pollutant in soil process.The pass of the technology
Key is to find one kind to extract the heavy metal of various forms and destroy the leacheate of soil texture.Studies have shown that
0.1mol·L-1For HCl as eluent, the removal rate to Cu, Ni, Pb, Zn is respectively 92%, 77%, 79%, 75%；Commonly
Artificial chelating agent, as ethylenediamine tetra-acetic acid (EDTA) is attained by ideal elution effect to Pb and Cd.A large amount of engineering practice tables
Bright, Soil leaching technology is a kind of fast and efficiently method.The poor soil remediation effect of weight viscous for geology, permeability
It is poor.Efficient eluent is expensive, and elution waste liquid may cause the secondary pollution of soil and groundwater.Currently, can scale
The Soil leaching technology and development of complete equipment of application relatively lag behind, it would be highly desirable to further increase and perfect.
Stabilization/curing soil recovery technique, which refers to, fixes noxious pollutant in soil with method physically or chemically
Come, or pollutant is converted to the inactive form of chemical property, prevents it from activities such as migrating, spread in the environment, to drop
The recovery technique of the murder by poisoning degree of low pollution substance.Common Curing Agents are divided into 4 classes: inorganic bond substance (such as cement, lime),
Organic binder (such as pitch thermoplastic material), thermmohardening organic polymer (such as urea, phenoplasts and epoxides),
Glassy substances.Chemistry is fixed mainly by the way that chemical agent or material is added, and is formed between heavy metal using it insoluble
Or poor mobility, small toxicity substance and reduce its biological effectiveness and migration in the soil.Existing a large amount of improvement material
Material, as Multimetal oxide, clay mineral, organic matter, macromolecule polymeric material, biomaterial are applied.The pass of the technology
Key is to find cheap and environmental-friendly modifying agent.Stabilization/curing soil recovery technique is in-situ immobilization, simple and easy,
But it is not a kind of permanent reclamation activities, because only changing the existing forms of heavy metal, heavy metal element is remained in soil,
It is easy reactivation and generates secondary pollution.
Bioremediation technology
It is biological prosthetic to refer to using specific bio-absorbable, conversion, removing or degradation environmental contaminants, realize that environment is net
Change, the biological control measure that ecological effect is restored, mainly includes phytoremediation, microorganism remediation and animal reparation.This method is because having
At low cost, easy to operate, without secondary pollution, high treating effect and the advantages that can be widely applied, mechanism study and is answered
It is concerned with prospect.
Phytovolatilization is to absorb metal using root system of plant, is translated into gaseous material and evaporate into atmosphere, to reduce
Soil pollution, but easily cause secondary pollution.Microorganism remediation is to heavy metal adsorption or to be converted into low toxicity using active microorganism
Product, to reduce heavy metal pollution degree.But microorganism individual is small, it is difficult to separate from soil, there is also existing with reparation
Field indigenous strain competition etc..Agro-ecology is repaired main include two aspect: one is to agronomy reclamation activities.Second is that restoration of the ecosystem.
The advantages that technology maturation, cost is relatively low, smaller to soil environment disturbance, but repairing efficiency is long, and effect is not significant.
Combined remediation technology
Studying more United Technologies at present includes bio combined technology, physical chemistry United Technologies and physical chemistry-life
Object United Technologies.The technology rests on the laboratory research stage more, and technological means is immature.
The above-mentioned prior art has the following disadvantages；
1, energy consumption is high, and operating cost is high
2, can scale application Soil leaching technology and development of complete equipment relatively lag behind
3, it is easy reactivation and generates secondary pollution
4, repairing efficiency is long, and effect is not significant
5, leacheate is unable to get organized flowing control, easily flows into groundwater environment, polluted underground water.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of low levels to elute high-order extraction technique processing soil
The method of heavy metal pollution in earth, the method for processing heavy metal in soil pollution can efficiently remove heavy metal in soil pollution
And eluent flow direction is made to be effectively controlled.
The present invention is achieved by the following technical solutions:
A kind of method that low level elutes high-order extraction technique processing heavy metal in soil pollution, carries out in accordance with the following steps:
Step 1, in soil surface vertical construction sand wick to be processed, depth is described to raw soil layer mellow soil layer intersection
Well spacing is 1~3m between sand drain, and arrangement form is the arrangement of round or square symmetry between sand drain；
Step 2, earth's surface is laid with deep silty clay working cushion layer, and the working cushion layer is with a thickness of 5~10cm；
Step 3, eluent pipe is set in the sand drain, and eluent pipe lower end is located at the sand drain bottom, described
The working cushion layer is exposed in eluent pipe upper end, and is connected with eluent input unit by hose；
Step 4, vacuum chimney filter is set up in the Vertical Square of working cushion layer, vacuum chimney filter lower end is located at the work
Bed course and soil intersection to be processed, the working cushion layer is exposed in vacuum chimney filter upper end, and passes through hose with vacuum system
It is connected, arrangement form is the arrangement of round or square symmetry between the vacuum chimney filter；
Step 5, in the groove that soil surrounding cutting depth to be processed is 30~50cm, plastics are laid on working cushion layer top
Film, and the plastic film surrounding is embedded in the groove, the eluent pipe and described true on the plastic film
The position aperture of air filter pipe makes eluent pipe upper end and vacuum chimney filter upper end stretch out the plastic film, so far vacuum
Pre-pressing system construction is completed；
Step 6, the vacuum system is opened, checks the airtightness of the vacuum prepressing system；
Step 7, carbon dioxide eluent is prepared, and the eluent is passed through the eluent pipe, control flow makes two
The flow of carbonoxide is 5~15g/min, while opening the vacuum system, and control absolute vacuum degree is 50~100kPa, is filtered
Speed control is in 2~5cm/s；
Step 8, after being passed through the 30~60min of eluent, stopping is passed through eluent；
Step 9, stop after being passed through 10~30min of eluent, close the vacuum system；
In the above-mentioned technical solutions, the sand drain depth is 20~50cm, 5~20cm of diameter.
In the above-mentioned technical solutions, the vacuum chimney filter diameter is in 2~20cm.
In the above-mentioned technical solutions, the eluent pipe uses PVC pipeline.
In the above-mentioned technical solutions, the partial-length that the eluent pipe is wrapped up by the hose should be not less than 3cm.
In the above-mentioned technical solutions, the partial-length that the vacuum chimney filter is wrapped up by the hose should be not less than 5cm.
In the above-mentioned technical solutions, the vacuum system includes vacuum pump and gas-liquid separation device.
In the above-mentioned technical solutions, the preparation carbon dioxide eluent process, makes carbon dioxide using nano bubble machine
It is dissolved in the water, the nano bubble machine 270~430W of power, 2~4h of cream time, 10~50 μm of bubble diameter.
In the above-mentioned technical solutions, the eluent is delivered to the eluent pipe using pump.
In the above-mentioned technical solutions, processing heel row water outlet is collected in gas-liquid separation device.
The advantages and benefits of the present invention are:
It includes vacuum chimney filter and eluent pipe that the method for the present invention, which includes: in soil internal vertical to be processed arrangement, and in soil
Earth surface is laid with Su Liao Bao Mo, system leak detection, the input of eluent low level and the extracting of a leacheate high position, has
The features such as effect property, exploitativeness, high efficiency and eco-environmental prote.
It is eluted using low level, the bicarbonate pollution raw soil layer that the method for high position extracting avoids heavy metal in soil from generating.
In particular by: vacuum chimney filter bottom is in working cushion layer and soil intersection, and eluent bottom of the tube is in raw soil layer and mellow soil
The arrangement of layer intersection, lessivation carry out simultaneously with extractive process, and Rapid extraction after elution, carbon dioxide is by vacuum pressure
Power influence diffuses up, in the generation of mellow soil layer and the rare heavy metallic salt of raw soil layer intersection, and the heavy metallic salt in mellow soil layer
Simultaneously by the migration of vacuum pressure, it can not migrate downward into, heavy metallic salt polluted underground water and soil can be effectively prevent, it is high-order
Extraction technique can also accelerate and expand the soil range to form bicarbonate, make elution processing it is more abundant, in soil with leaching
The bigger mass transfer effect of the contact area of lotion is enhanced.
In addition, the present invention also uses nano bubble machine to prepare eluent, eluting for carbon dioxide can be further improved
Solubility in agent.
In conclusion advantage of the present invention can efficiently handle the heavy metal element in soil, and will not be to surrounding
Environment and underground water cause secondary pollution.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment of the present invention one.
Fig. 2 is the eluent pipe and vacuum chimney filter arrangement schematic diagram of the embodiment of the present invention two.
Wherein:
1: raw soil layer, 2: mellow soil layer, 3: working cushion layer, 4: plastic film, 5: eluent pipe, 6: vacuum chimney filter, 7: nanometer
Air bubble machine, 8: pump, 9: hose, 10: gas-liquid separation device, 11: vacuum pump.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, combined with specific embodiments below furtherly
Bright technical solution of the present invention.
Embodiment one
Sampling soil sample content of beary metal is Pb:78mg/kg, Cd:0.2mg/kg, Cr:96mg/kg, Cu:60mg/kg, Zn:
1270mg/kg,
Step 1, in the planting soil ground of 3m*3m*0.4m, beating diameter is 7cm, and depth is the sand wick of 40cm, well spacing
For 1.3m, arrangement form is square distribution totally 9 between sand drain；
Step 2, earth's surface is laid with deep silty clay working cushion layer, and the working cushion layer is with a thickness of 5cm；
Step 3, PVC eluent pipe diameter is arranged in the sand drain is 6cm, and eluent pipe lower end is located at the sand
Bottom, the working cushion layer 5cm is exposed in eluent pipe upper end, and is connected with eluent input unit by hose, drenches
The partial-length 3cm that lotion pipe is wrapped up by hose；
Step 4, setting up vacuum chimney filter diameter in the Vertical Square of working cushion layer is 7cm, vacuum chimney filter lower end position
In the working cushion layer and soil intersection to be processed, the working cushion layer 7cm, and and vacuum are exposed in vacuum chimney filter upper end
System is connected by hose, and arrangement form is the arrangement of round or square symmetry between the vacuum chimney filter, and vacuum chimney filter is soft
The partial-length 5cm of pipe package, for pipe away from being 1.3m, arrangement form, which is square, between vacuum chimney filter is distributed totally 9；
Step 5, in the groove that soil surrounding cutting depth to be processed is 40cm, it is thin that plastics are laid on working cushion layer top
Film, and the plastic film surrounding is embedded in the groove, the eluent pipe and the vacuum on the plastic film
The aperture of chimney filter position makes eluent pipe upper end and vacuum chimney filter upper end stretch out the plastic film, and so far vacuum is pre-
System construction is pressed to complete；
Step 6, the vacuum system is opened, checks the airtightness of the vacuum prepressing system；
Step 7, make carbon dioxide solubility in washing water using nano bubble machine, using nuclear industry Beijing emtallurgy research institute
Nano bubble machine, water pump 400V, cream time 2h, form leacheate 100kg by 10 μm of bubble diameter.And the eluent is pumped
Enter the eluent pipe, control flow makes the flow 5g/min of carbon dioxide, while opening the vacuum system, and control is absolute
Vacuum degree is 70kPa, filters speed control in 4cm/s；
Step 8, after being passed through the eluent 40min, stopping is passed through eluent；
Step 9, stop after being passed through eluent 10min, close the vacuum system；
Collect the water of discharge.Sample detection soil content of beary metal.Through in detection soil, lead removal rate reaches 96%, chromium
Removal rate reaches 96%, and copper removal rate reaches 94%, and zinc removal rate reaches 97%, and cadmium removal rate reaches 93%.
Water quality in raw soil layer is sampled, does not detect heavy metal bicarbonate.
Embodiment two
Sampling soil sample content of beary metal is Pb:86mg/kg, Cd:0.1mg/kg, Cr:86mg/kg, Cu:60mg/kg, Zn:
1600mg/kg
Step 1, in the planting soil ground of 8m*8m*0.5m, beating diameter is 10cm, and depth is the sand wick of 50cm, well spacing
For 1.5m, arrangement form is square distribution totally 16 between sand drain；
Step 2, earth's surface is laid with deep silty clay working cushion layer, and the working cushion layer is with a thickness of 7cm；
Step 3, PVC eluent pipe diameter is arranged in the sand drain is 9cm, and eluent pipe lower end is located at the sand
Bottom, the working cushion layer 5cm is exposed in eluent pipe upper end, and is connected with eluent input unit by hose, drenches
The partial-length 3cm that lotion pipe is wrapped up by hose；
Step 4, setting up vacuum chimney filter diameter in the Vertical Square of working cushion layer is 7cm, vacuum chimney filter lower end position
In the working cushion layer and soil intersection to be processed, the working cushion layer 7cm, and and vacuum are exposed in vacuum chimney filter upper end
System is connected by hose, and arrangement form is the arrangement of round or square symmetry between the vacuum chimney filter, and vacuum chimney filter is soft
The partial-length 5cm of pipe package, for pipe away from being 1.5m, arrangement form, which is square, between vacuum chimney filter is distributed totally 9；
Step 5, in the groove that soil surrounding cutting depth to be processed is 40cm, it is thin that plastics are laid on working cushion layer top
Film, and the plastic film surrounding is embedded in the groove, the eluent pipe and the vacuum on the plastic film
The aperture of chimney filter position makes eluent pipe upper end and vacuum chimney filter upper end stretch out the plastic film, and so far vacuum is pre-
System construction is pressed to complete；
Step 6, the vacuum system is opened, checks the airtightness of the vacuum prepressing system；
Step 7, make carbon dioxide solubility in washing water using nano bubble machine, using nuclear industry Beijing emtallurgy research institute
Nano bubble machine, water pump 400V, cream time 4h, form leacheate 500kg by 10 μm of bubble diameter.And the eluent is pumped
Enter the eluent pipe, control flow makes the flow 25g/min of carbon dioxide, while opening the vacuum system, and control is exhausted
It is 85kPa to vacuum degree, filters speed control in 5cm/s；
Step 8, after being passed through the eluent 60min, stopping is passed through eluent；
Step 9, stop after being passed through eluent 20min, close the vacuum system；
Collect the water of discharge.Sample detection soil content of beary metal.Through in detection soil, lead removal rate reaches 92%, chromium
Removal rate reaches 89%, and copper removal rate reaches 90%, and zinc removal rate reaches 95%, and cadmium removal rate reaches 88%.
Water quality in raw soil layer is sampled, does not detect heavy metal bicarbonate.
Embodiment three
Sampling soil sample content of beary metal be Pb:85mg/kg, Cd:0.15mg/kg, Cr:87mg/kg, Cu:57mg/kg,
Zn:1588mg/kg
Step 1, in the planting soil ground of 8m*8m*0.5m, beating diameter is 10cm, and depth is the sand wick of 40cm, well spacing
For 1.5m, arrangement form is square distribution totally 16 between sand drain；
Step 2, earth's surface is laid with deep silty clay working cushion layer, and the working cushion layer is with a thickness of 7cm；
Step 3, PVC eluent pipe diameter is arranged in the sand drain is 8cm, and eluent pipe lower end is located at the sand
Bottom, the working cushion layer 5cm is exposed in eluent pipe upper end, and is connected with eluent input unit by hose, drenches
The partial-length 5cm that lotion pipe is wrapped up by hose；
Step 4, setting up vacuum chimney filter diameter in the Vertical Square of working cushion layer is 7cm, vacuum chimney filter lower end position
In the working cushion layer and soil intersection to be processed, the working cushion layer 7cm, and and vacuum are exposed in vacuum chimney filter upper end
System is connected by hose, and arrangement form is the arrangement of round or square symmetry between the vacuum chimney filter, and vacuum chimney filter is soft
The partial-length 5cm of pipe package, for pipe away from being 1.5m, arrangement form, which is square, between vacuum chimney filter is distributed totally 9；
Step 5, in the groove that soil surrounding cutting depth to be processed is 40cm, it is thin that plastics are laid on working cushion layer top
Film, and the plastic film surrounding is embedded in the groove, the eluent pipe and the vacuum on the plastic film
The aperture of chimney filter position makes eluent pipe upper end and vacuum chimney filter upper end stretch out the plastic film, and so far vacuum is pre-
System construction is pressed to complete；
Step 6, the vacuum system is opened, checks the airtightness of the vacuum prepressing system；
Step 7, make carbon dioxide solubility in washing water using nano bubble machine, using nuclear industry Beijing emtallurgy research institute
Nano bubble machine, water pump 400V, cream time 4h, form leacheate 500kg by 10 μm of bubble diameter.And the eluent is pumped
Enter the eluent pipe, control flow makes the flow 20g/min of carbon dioxide, while opening the vacuum system, and control is exhausted
It is 80kPa to vacuum degree, filters speed control in 3cm/s；
Step 8, after being passed through the eluent 60min, stopping is passed through eluent；
Step 9, stop after being passed through eluent 30min, close the vacuum system；
Collect the water of discharge.Sample detection soil content of beary metal.Through in detection soil, lead removal rate reaches 93%, chromium
Removal rate reaches 90%, and copper removal rate reaches 88%, and zinc removal rate reaches 94%, and cadmium removal rate reaches 85%.
Water quality in raw soil layer is sampled, does not detect heavy metal bicarbonate.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (10)
1. a kind of method that low level elutes high-order extraction technique processing heavy metal in soil pollution, which is characterized in that according to as follows
Step carries out,
Step 1, in soil surface vertical construction sand wick to be processed, depth to raw soil layer mellow soil layer intersection, the sand drain
Between well spacing be 1~3m, arrangement form is the arrangement of round or square symmetry between sand drain；
Step 2, earth's surface is laid with deep silty clay working cushion layer, and the working cushion layer is with a thickness of 5~10cm；
Step 3, eluent pipe is set in the sand drain, and eluent pipe lower end is located at the sand drain bottom, the elution
The working cushion layer is exposed in agent pipe upper end, and is connected with eluent input unit by hose；
Step 4, vacuum chimney filter is set up in the Vertical Square of working cushion layer, vacuum chimney filter lower end is located at the working cushion layer
With soil intersection to be processed, the working cushion layer is exposed in vacuum chimney filter upper end, and is connected with vacuum system by hose,
Arrangement form is the arrangement of round or square symmetry between the vacuum chimney filter；
Step 5, in the groove that soil surrounding cutting depth to be processed is 30~50cm, it is thin that plastics are laid on working cushion layer top
Film, and the plastic film surrounding is embedded in the groove, the eluent pipe and the vacuum on the plastic film
The aperture of chimney filter position makes eluent pipe upper end and vacuum chimney filter upper end stretch out the plastic film, and so far vacuum is pre-
System construction is pressed to complete；
Step 6, the vacuum system is opened, checks the airtightness of the vacuum prepressing system；
Step 7, carbon dioxide eluent is prepared, and the eluent is passed through the eluent pipe, control flow makes titanium dioxide
The flow of carbon is 5~15g/min, while opening the vacuum system, and control absolute vacuum degree is 50~100kPa, filters speed
Control is in 2~5cm/s；
Step 8, after being passed through the 30~60min of eluent, stopping is passed through eluent；
Step 9, stop after being passed through 10~30min of eluent, close the vacuum system.
2. the method according to claim 1, wherein the sand drain depth is 20~50cm, 5~20cm of diameter.
3. the method according to claim 1, wherein 2~20cm of the vacuum chimney filter diameter.
4. the method according to claim 1, wherein the eluent pipe uses PVC pipeline.
5. the method according to claim 1, wherein the partial-length that the eluent pipe is wrapped up by the hose
3cm should be not less than.
6. the method according to claim 1, wherein the partial-length that the vacuum chimney filter is wrapped up by the hose
5cm should be not less than.
7. the method according to claim 1, wherein the vacuum system includes vacuum pump and gas-liquid separation dress
It sets.
8. the method according to claim 1, wherein the preparation carbon dioxide eluent process, using nanometer
Air bubble machine makes carbon dioxide solubility Yu Shuizhong, the nano bubble machine power 400W, 2~4h of cream time, and bubble diameter 10~
50μm。
9. the method according to claim 1, wherein the eluent is delivered to the eluent pipe using pump.
10. the method according to the description of claim 7 is characterized in that collecting processing heel row water outlet in gas-liquid separation device.
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| CN112517626A (en) * | 2019-09-17 | 2021-03-19 | 吕正雄 | Method and device for quickly repairing saline-alkali soil and heavy metal contaminated soil |
| CN112642847A (en) * | 2020-12-25 | 2021-04-13 | 上海勘察设计研究院(集团)有限公司 | Remediation method based on structural evolution of chlorinated hydrocarbon polluted soil |
| CN113020243A (en) * | 2021-03-15 | 2021-06-25 | 常州市建筑科学研究院集团股份有限公司 | High-pressure splitting extrusion powder-doping infiltration-assisting in-situ remediation method for low-permeability polluted soil |
| CN114871262A (en) * | 2022-04-22 | 2022-08-09 | 淄博高新技术产业开发区精细化工和高分子材料研究院 | CO 2 +O 2 Green eluting agent and in-situ eluting process |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1190410A (en) * | 1997-09-16 | 1999-04-06 | Ohbayashi Corp | In-situ remediation system of contaminant |
| JP2002001006A (en) * | 2000-06-19 | 2002-01-08 | Ebara Corp | Method for extracting organic compound from solid containing organic compound |
| KR20030083552A (en) * | 2002-04-19 | 2003-10-30 | 후지기소고교 가부시키가이샤 | Method for improving polluted soil |
| US7128153B2 (en) * | 2001-10-24 | 2006-10-31 | Shell Oil Company | Treatment of a hydrocarbon containing formation after heating |
| CN101021520A (en) * | 2007-03-23 | 2007-08-22 | 天津大学 | Soilgas phase extracting monitoring system device and monitoring method |
| EP2209533A4 (en) * | 2007-09-26 | 2010-10-13 | Verutek Technologies Inc | Method for extraction and surfactant enhanced product recovery |
| CN103785681A (en) * | 2014-02-18 | 2014-05-14 | 江苏江达市政园林建设有限公司 | Method for efficiently remedying heavy metal ion contamination in soil |
| CN105239554A (en) * | 2015-08-27 | 2016-01-13 | 上海十三冶建设有限公司 | Vacuum and preloading drainage structure with low-permeability sand layers and construction method |
| CN105945045A (en) * | 2016-06-03 | 2016-09-21 | 南通国盛环境修复有限责任公司 | In-situ vertical well leaching repair system and application method |
| CN205773446U (en) * | 2016-06-01 | 2016-12-07 | 上海岩土工程勘察设计研究院有限公司 | Filling circular water treating system is taken out for polluting the multichannel connection gang of wells of water and soil reparation |
| CN206578131U (en) * | 2017-01-12 | 2017-10-24 | 上格环境科技（上海）有限公司 | Soil and groundwater remediation system |
-
2018
- 2018-02-08 CN CN201810129698.5A patent/CN110125158B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1190410A (en) * | 1997-09-16 | 1999-04-06 | Ohbayashi Corp | In-situ remediation system of contaminant |
| JP2002001006A (en) * | 2000-06-19 | 2002-01-08 | Ebara Corp | Method for extracting organic compound from solid containing organic compound |
| US7128153B2 (en) * | 2001-10-24 | 2006-10-31 | Shell Oil Company | Treatment of a hydrocarbon containing formation after heating |
| KR20030083552A (en) * | 2002-04-19 | 2003-10-30 | 후지기소고교 가부시키가이샤 | Method for improving polluted soil |
| CN101021520A (en) * | 2007-03-23 | 2007-08-22 | 天津大学 | Soilgas phase extracting monitoring system device and monitoring method |
| EP2209533A4 (en) * | 2007-09-26 | 2010-10-13 | Verutek Technologies Inc | Method for extraction and surfactant enhanced product recovery |
| CN103785681A (en) * | 2014-02-18 | 2014-05-14 | 江苏江达市政园林建设有限公司 | Method for efficiently remedying heavy metal ion contamination in soil |
| CN105239554A (en) * | 2015-08-27 | 2016-01-13 | 上海十三冶建设有限公司 | Vacuum and preloading drainage structure with low-permeability sand layers and construction method |
| CN205773446U (en) * | 2016-06-01 | 2016-12-07 | 上海岩土工程勘察设计研究院有限公司 | Filling circular water treating system is taken out for polluting the multichannel connection gang of wells of water and soil reparation |
| CN105945045A (en) * | 2016-06-03 | 2016-09-21 | 南通国盛环境修复有限责任公司 | In-situ vertical well leaching repair system and application method |
| CN206578131U (en) * | 2017-01-12 | 2017-10-24 | 上格环境科技（上海）有限公司 | Soil and groundwater remediation system |
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|---|---|---|---|---|
| CN112517626A (en) * | 2019-09-17 | 2021-03-19 | 吕正雄 | Method and device for quickly repairing saline-alkali soil and heavy metal contaminated soil |
| CN111715684A (en) * | 2020-07-17 | 2020-09-29 | 西藏神州瑞霖环保科技股份有限公司 | Contaminated soil remediation system and contaminated soil remediation method |
| CN112642847A (en) * | 2020-12-25 | 2021-04-13 | 上海勘察设计研究院(集团)有限公司 | Remediation method based on structural evolution of chlorinated hydrocarbon polluted soil |
| CN113020243A (en) * | 2021-03-15 | 2021-06-25 | 常州市建筑科学研究院集团股份有限公司 | High-pressure splitting extrusion powder-doping infiltration-assisting in-situ remediation method for low-permeability polluted soil |
| CN114871262A (en) * | 2022-04-22 | 2022-08-09 | 淄博高新技术产业开发区精细化工和高分子材料研究院 | CO 2 +O 2 Green eluting agent and in-situ eluting process |
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