CN106799395A - The construction method of contaminated site is repaired in a kind of environmentally friendly medicament injection in situ - Google Patents
The construction method of contaminated site is repaired in a kind of environmentally friendly medicament injection in situ Download PDFInfo
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- CN106799395A CN106799395A CN201710068296.4A CN201710068296A CN106799395A CN 106799395 A CN106799395 A CN 106799395A CN 201710068296 A CN201710068296 A CN 201710068296A CN 106799395 A CN106799395 A CN 106799395A
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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
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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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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Abstract
The invention discloses the construction method that contaminated site is repaired in a kind of injection in situ of environmentally friendly medicament, including：Carry out lab scale experiment；Construct vertical divider wall；In area to be repaired ground mulching compacted cohesive soil layer；Injection construction point position is positioned, and construction equipment is located in construction point position；Injection blackstrap and acetic acid bacteria mixed solution；Sealing of hole is carried out to construction point position；Displacement construction equipment；Anti-seepage geomembrane is set on compacted cohesive soil layer upper berth, the anti-seepage geomembrane is connected with divider wall；From area to be repaired sampling detection acid-base value and oxidation-reduction potential；Injection micron iron powder and xanthans mixed solution；To construction point position sealing of hole；Construction equipment is shifted；In area to be repaired ground mulching anti-seepage geomembrane.The construction method can significantly improve the EFFECTIVE RANGE of medicament, be lifted to soil and the reduction efficiency of underground water pollutant, and can active balance reaction system acid-base value, realize the efficient reduction reparation to soil and underground water pollutant.
Description
Technical field
The invention belongs to civil engineering, environmental geotechnical technical field, it particularly relates to a kind of environmentally friendly medicament
The construction method of contaminated site is repaired in original position injection.
Background technology
Due to the rapidly development of industrial agricultural, Cr VI or can be by the chlorinated organics contaminated site of deoxidization, degradation existing
Generally existing in reality.Wherein, Cr VI Cr (VI) has oxidisability, and corrosion that can be strong simultaneously destroys organism, is international public
One of three kinds of carcinogenic metal objects recognized, are listed in one of 8 kinds of maximum chemical substances of harm, are Environmental Protection Agency EPA
One of dangerous pollutant of confirmation.China will also contain chromium waste and be classified as " hazardous waste " register.Substantial amounts of Cr VI Cr (VI) with
Rainwater is molten to be oozed, is lost in, penetrating into earth's surface, so that polluted underground water, also pollutes rivers, lake, and then endanger farmland, aquatic products and people
Body health.Cr VI Cr (VI) is easily absorbed by the body, and accumulates in vivo, strong toxicity；It is irritating to the skin and is acted on allergy, it is right
Respiratory system also has infringement, is invaded through alimentary canal, can cause going down so that disappearing for taste and smell.Cr VI Cr (VI) passes through
After oral cavity enters human body, a series of lesion, such as anaemia, Myocardial damage, liver-kidney diseases change, circulatory failure can be caused, or even extremely
Die；In addition Cr VI Cr (VI) has a mutagenesis teratogenesis and carcinogenic, and carcinogenic position is mainly lung and can be in human body
Savings.And chlorinated organics, including chlorohydrocarbon, chlorination aromatic hydrocarbon and organochlorine insecticide etc., it was used as a class important modern age
Chemical Manufacture raw material and intermediate, underground is widely present in due to a large amount of production and applications and its withholding property high in the environment
In water and soil.There is the feature of ambient concentration high in many type areies of China, the safe for drinking of underground water has been had a strong impact on.
In 129 kinds of threat pollutants that Environmental Protection Agency EPA is announced, chlorinated organics are that account for kind more than 70；It is dirty in China's Environment Priority
In the 58 kinds of toxic organic compounds announced in dye thing " blacklist ", more than 20 kinds of chlorinated organics are just contained.Research display is chloride to be had
Machine thing has carcinogenic, teratogenesis, mutagenesis, and most of chlorinated organics are that incretion interferent or potential endocrine are dry
Disturb thing.Due to its difficult natural degradation, can steadily in the long term exist in the environment, the health of the mankind and biology, and its can be had a strong impact on
Harm influence can continue several generations, and significant threat is constituted to human survival procreation.As can be seen here, Cr VI or chlorinated organics
High risks are generated to ecological environment for the presence of contaminated site and reparation difficulty is larger.Therefore, development is needed badly to such pollution
The improvement in place, environment acceptable level is reduced to by the Cr VI in place soil and underground water and chlorinated organics concentration.
The Cr VI or chlorinated organics contaminated site recovery technique for using at this stage include in situ and showering technology
Two kinds, but there is different degrees of limitation, it is unfavorable for that large-scale promotion is used.Wherein showering carries soil due to needing
Earth and groundwater abstraction, earth moving amount are more, big to Geotechnical Environment destructiveness, and the contaminated soil or the ground of extraction for excavating
Lower water needs after-treatment, and to remove wherein pollutant, its flow is complicated, relatively costly, it is necessary to various construction equipments, therefore only
Suitable for the reparation of small area contaminated site.And in-situ immobilization at this stage there is also following various problems：(1) cement solidification/
Stabilization technology causes that contaminated soil forms the firming body of stabilization to cement is added in the soil of place, and then by Cr VI sealed bundle
It is rolled in inert matrix, reduces transfer ability of the chromium in soil to surrounding environment, but it does not change the form of Cr VI, Gu
Change the pollution soil body and there is the hidden danger for polluting again under complex environment；The high alkalinity of cement solidification simultaneously can change the soil body and water body
Acid-base balance, have a negative impact to periphery biology；Resistance of soil is high after reparation, is unfavorable for follow-up sampling detection and the earthwork
Excavate operation；In addition cement solidification/stabilization technology is poor to the treatment effect of hexavalent chromium polluted underground water.Simultaneously the technology without
Method effectively reduces chlorinated organics contaminants level.It is anti-that research shows that hydrolysis product of cement cannot occur stabilization with organic matter
Should be with the fixed organic pollution of chemistry, opposite organic matter can also suppress hydrated reaction of cement, and then reduce cement to organic contamination
The physically encapsulation effect of thing, finally influences solidification effect.Additionally, clinker can discharge amount of heat in hydration process, lead
Cause the stabilization in solidification process drastically to raise, under conventional curing condition more than solidified cement body temperature 50 C, and various chloride have
Organic pollutants can be i.e. volatilizable once in this temperature, and such as dichloromethane (39.8 DEG C of boiling point), and part chlorinated organics is heated
The severe toxicity gas such as phosgene can be also produced, secondary pollution is caused to ecological environment around.(2) in-situ chemical elution technique then passes through point
Well injects the drip washing contaminated soil repeatedly of the chemical solution with height extraction or reducing power, and then script is adsorbed in soil
Pollutant be extracted into solution and be reduced to the product of hypotoxicity, wherein Cr VI is reduced to the trivalent chromium of low toxicity,
And contamination with chlorinated organics is then reduced dechlorination and then degraded.The technology medicament usage amount is big, and acid or alkali environment is single, repairs back court
Ground soil and underground water acid-base value cannot effectively be recovered；And the change of soil mineral physicochemical characteristics is easily caused, while inapplicable
In the less stratum of the infiltration coefficients such as clay, silt；In addition ferrous sulfate (the FeSO that it is used4), sodium pyrosulfite
(Na2S2O5), frerrous chloride (FeCl2) etc. reduction medicament in contain a large amount of corrosivity anion, soil and underground water can be caused
Secondary pollution, jeopardously descends the structures safety such as engineered cementitious, reinforcing bar.
For the drawbacks described above that existing restorative procedure has, find one kind can more thoroughly reduce removal place soil,
Cr VI, reducible contamination with chlorinated organics in lower water, while environment-friendly, with low cost, repair ability stabilization, after reparation
Soil and groundwater ph balancing, is conducive to biological growth, and the in-situ immobilization construction method of non-secondary pollution to turn into the industry
The focus of personage's growing interest.
The content of the invention
Technical problem：The technical problems to be solved by the invention are：A kind of injection in situ of environmentally friendly medicament is provided to repair
The construction method of multiple contaminated site, the construction method can be such that environmentally friendly medicament is directly fully connect with contaminated soil, underground water
Touch and react, lift the reduction efficiency of medicament, improve the EFFECTIVE RANGE of medicament, and then can thoroughly reduce removal soil
The chlorinated organics of Cr VI or reducible degraded in earth and underground water, and the unhelpful loss for repairing medicament can be reduced, effectively
Balance the acid-base value on stratum.
Technical scheme：In order to solve the above technical problems, the technical solution adopted by the present invention is：
The construction method of contaminated site is repaired in a kind of environmentally friendly medicament injection in situ, and the construction method includes following step
Suddenly：
Step 10) carry out lab scale experiment：The lab scale experiment of contaminated site scene is carried out for medicament, in the reparation point position of design
Testing site is set with depth, medicament injection pressure, mixing time, injection length, Optimizing construction point arrangement density is determined；
Step 20) construct vertical divider wall：Vertical partition wall construction is carried out around Polluted area；The divider wall is along deep
Degree runs through whole area to be repaired stratum, and is embedded in the bottom impermeable stratum on area to be repaired stratum；
Step 30) in area to be repaired ground mulching compacted cohesive soil layer, the compacted cohesive soil layer is connected with divider wall；
Step 40) injection construction point position is positioned, and construction equipment is located in construction point position；
Step 50) injection blackstrap and acetic acid bacteria mixed solution：In construction point position, injection blackstrap in situ and acetic acid bacteria are mixed
Solution is closed, and is stirred with contaminated soil and underground water Forced Mixing；
Step 60) sealing of hole is carried out to construction point position：After the construction of single construction point position terminates, by what is formed in work progress
Construction hole is blocked；
Step 70) displacement construction equipment：Mobile construction equipment injects construction point position, and repeat step 50 to next) and step
It is rapid 60), until completing the injection of blackstrap and acetic acid bacteria mixed solution and the sealing of hole in construction hole to whole construction points position；
Step 80) anti-seepage geomembrane is set on compacted cohesive soil layer upper berth, the anti-seepage geomembrane is connected with divider wall；
Step 90) from area to be repaired, sampling detects acid-base value and oxidation-reduction potential：Drill through the soil of area to be repaired
And underground water, when the oxidation-reduction potential and acid-base value of soil and underground water meet sets requirement, into step 100)；When not
When meeting sets requirement, then anti-seepage geomembrane being covered again, being conserved, whether detection acid-base value and oxidation-reduction potential meet
It is required that, if more than 7 days after the completion of the injection construction of blackstrap and acetic acid bacteria mixed solution, acid-base value and oxidation-reduction potential
When still being unsatisfactory for requiring, then restart step 50)~step 80), until the oxidation of area to be repaired soil and underground water is also
Former current potential and acid-base value meet sets requirement；
Step 100) injection micron iron powder and xanthans mixed solution：Micron iron powder and xanthans are injected in area to be repaired
Mixed solution, and stirred with contaminated soil and underground water Forced Mixing；
Step 110) to construction point position sealing of hole：After the completion of the construction of single construction point position, the construction hole of formation is blocked；
Step 120) construction equipment displacement：Transfer construction equipment to next pressure injects construction point position, repeat step 10) and
Step 110), until completing injection stirring construction and the construction hole of the micron iron powder and xanthans mixed solution of whole construction point positions
Sealing of hole；
Step 130) in area to be repaired ground mulching anti-seepage geomembrane：The micron iron powder and xanthans of whole construction point positions
After the completion of mixed solution injection stirring construction, in step 30) in compacted cohesive soil coating upper berth set anti-seepage geomembrane, and with treat
The vertical divider wall connection of restoring area periphery, surrounding and integrally closed system is formed in area to be repaired up and down.
Used as preference, the construction method of contaminated site is repaired in the injection in situ of described environmentally friendly medicament, is also included：
Step 140) inspection contaminated site repairing effect：Step 130) construction complete 7 days after, drill through area to be repaired soil
And underground water, check repairing effect；When the content of the pollutant in soil and underground water is less than desired value is repaired, and acid-base value
When meeting 6.5≤pH value≤7.5, reparation terminates；When pollutant load is higher than desired value is repaired in soil and underground water, repeat
Step 50)~step 110)；When pollutant load is less than reparation desired value, but acid-base value pH value ＜ 6.5 in soil and underground water
When, continue to conserve, until area to be repaired soil and underground water acid-base value meet 6.5≤pH value≤7.5.
Used as preference, described reparation desired value is the content≤2mg/kg or 0.1mg/L of pollutant.
As preference, step 40) in, 2 times of the medicament that is smaller than of adjacent construction point position injects and having after stirring
Effect operating distance.
As preference, step 90) in, sets requirement refers to：Oxidation-reduction potential is less than or equal to -100mV, and pH value exists
Between 2.5~5.0.
As preference, described step 50) in, in blackstrap and acetic acid bacteria mixed solution, by butt mass percent
It is composed of the following components：
Blackstrap：98.2%；
Acetic acid bacterium powder：1.8%.
Used as preference, described blackstrap is the waste liquid of generation during industry sugaring, containing sugar in waste liquid, wherein, contain
Sugar amount >=25%, water content≤75%.
Used as preference, described waste liquid also contains alcohol, and alcohol content≤22%.
As preference, described step 100) in, micron iron powder and xanthans mixed solution, by butt mass percent
It is composed of the following components：
Micron iron powder：83.8%~97.7%；
Xanthans：2.3%~16.2%.
As preference, particle diameter≤300 μm of described micron iron powder, specific surface area >=0.01m2/g；In micron iron powder
Mass content >=70% of the iron powder with reproducibility；Described xanthans is technical grade or food-grade powder xanthans；Xanthan
The pH value of glue is 6.0~8.0, purity >=85%, viscosity >=600mpas, water content≤15%, and particle diameter is less than 0.2mm's
Particle accounts for more than 98%.
Beneficial effect：Compared with prior art, the construction method of the embodiment of the present invention has advantages below：
1. reduction remediation efficiency is high, and medicament utilization rate is high.In the embodiment of the present invention, environmentally friendly medicament by apply time
Sequence is respectively blackstrap and acetic acid bacteria mixed solution, micron iron powder and xanthans mixed solution.Wherein blackstrap and acetic acid bacteria are mixed
Close the acetic acid bacteria in solution and can adapt to most of ground environments (10~35 DEG C of acid-base value 2.5~8.0, temperature), therefore injection
Can be carbon source Rapid development, propagation with blackstrap behind stratum.The one kind for the oxygen consumption microorganism being widely present as nature, its
Oxygen in largely consuming stratum soil and underground water in breeding, and then effectively reduce the redox electricity in stratum
Position, it is to avoid the passivation of micron iron powder of the oxygen that stratum is rich in being subsequently implanted into and the drug out loss that causes, and then can
Improve reducing power of the micron iron powder to pollutant.In addition acetic acid bacteria using oxygen can also by the sugar in blackstrap and alcohol into
Point be oxidized to acetic acid, weak organic acid acid can effectively reduce the pH value of stratum soil and underground water, beneficial in soil with soil
Grain, organic matter combine the desorption and dissolution of more close pollutant, and then realize to the reluctant pollutant in this part
Reduction removal.The acetic acid of generation can effectively elute micron passivation layer on iron powder surface simultaneously, and the sour environment for causing is beneficial to micro-
The reduction reaction of rice iron powder, improves the availability of medicament.And the blackstrap in mixed solution contains abundant sucrose, conversion
The reducing substanceses such as sugar, colloid, itself have efficient reducing power, therefore, it is possible to assist a micron iron powder further to promote dirt
Contaminate the reduction and degraded of thing.Micron iron powder interfacial energy in micron iron powder and xanthans mixed solution is high, while source is wide
It is general to prepare simply, parent pollutant can be efficiently gone back in sour environment.Xanthans then a kind of viscolloid, with unique shearing
Thinning characteristic, therefore, it is possible to improve sustained suspension ability and uniform journey of micron ferrous powder granules in stratum soil and underground water
Degree, it is to avoid micron iron powder cannot effectively be pumped because of gravitational settling and migration distance in the earth formation and degree of scatter it is limited lack
Point, and then the contact range and uniformity of micron iron powder and soil and underground water pollutant are lifted, effectively improve a micron iron powder
Utilization rate and remediation efficiency.The pressure injection and action of forced stirring mode that the present invention is used also are able to ensure that medicament on soil and ground
Uniform diffusion in lower, it is ensured that its medicament has larger EFFECTIVE RANGE, additionally can reasonably control medicament
Construction volume, improves the directive property repaired, and has saved medicament usage amount.The divider wall and compacted cohesive soil layer energy set before medicament injection
It is enough effectively to prevent pollutant from being spread to region external migration, it is to avoid the pollution again to surrounding environment；Simultaneously being capable of effective barrier ring
In border pollutant pour in down a chimney and oxygen input so that restoring area be able to for a long time maintain compared with lower oxidation reduction potential and acyclic acidic
Border, and then ensure the reduction efficiency high to pollutant；And medicament can be prevented in the case where pressure is injected to surrounding formation and earth's surface
Overflow, reduce drug out loss.And the step such as anti-seepage geomembrane and slip casting point position sealing of hole in construction method of the invention, further subtract
The interface channel of small restoring area and external environment so that whole restoring area can form a closed system, beneficial to repairing
The holding of multiple region lower oxidation reduction potential and acid-base value, and then the reduction removal beneficial to micron iron powder to pollutant.In addition it is each
The medicament useful effect region of injection construction point position overlaps, it is ensured that medicament can enter all Polluted areas.Construction party of the present invention
The sampling detecting step of acid-base value, oxidation-reduction potential, pollutant concentration in method, it is ensured that medicament reduction removal pollutant effect
Rate and reliability.And the present invention can also be prevented effectively from the dust raising phenomenon of powder medicament in the form of liquid preparation, further
Reduce the inadvertent loss of medicament.
2. simple to operate, construction is quick, low cost.The construction method of the embodiment of the present invention does not need large area earth excavation
Or groundwater abstraction, it is thus possible to significantly reduce workload, construction cost and shorten the duration.The medicament for using is prepared simply,
Low cost, effect is rapid, repairs speed.Wherein micron iron powder is prepared and does not need complex device, and xanthans can use work
Industry level xanthans, its volume is relatively low.And acetic acid bacteria volume is few, can be bred using blackstrap culture after stratum is injected, do not expended
Cost.Xanthan gum solution viscosity under high shear forces drastically declines, and when shearing force is eliminated, then recovers immediately original
Viscosity, therefore pressure injection mode of the present invention can be utilized to inject in pollution stratum the micron iron powder original position of difficult pumping, its behaviour
Make simple and easy to apply, effect is significant.In addition the construction of injection medicament and action of forced stirring mode that the present invention is used is rapid, general pollution
The injection repair of all point positions is can be achieved with a couple of days of place.Compacted cohesive soil layer in construction method of the present invention can be to apply
Construction equipment provides high-strength working face, beneficial to the rapid traverse of construction equipment, and then effectively reduces difficulty of construction, accelerates construction speed
Degree.Pressure injection stirring of the constructing of divider wall, medicament etc. can utilize existing ripe divider wall, cement mixing pile in the present invention
Technology and relevant device, thus do not need extra scrap build to work.In addition the detection letter of redox point position and acid-base value
It is single easy, again without complex device.And because acetic acid bacteria can largely generate acetic acid in the case of carbon source abundance, have
Effect reduces the acid-base value of stratum soil and groundwater, and when carbon source is further consumed, acetic acid bacteria can further aoxidize vinegar again
Acid is carbon dioxide and water, and then recovers environment acid-base value, therefore without carrying out the soil and underground water of complexity before and after repairing
The acid-base value regulation operation of environment, which further simplifies construction procedure, reduces construction cost.
3. environment-friendly, twice laid.The construction method implementation process of the embodiment of the present invention does not produce harmful substance.This hair
Acetic acid bacteria is widely present in nature in the medicament of bright use, can digest decomposition by human body, while being completed in site remediation
Can naturally be sterilized due to the consumption completely of carbon source, it is small to place and surrounding eco-environmental impact；And blackstrap ingredient origin is refined sugar
Industrial washing, the waste material for boiling generation in the links such as sugar and vacuum suction filter, can be carbon dioxide by the final efficient-decomposition of acetic acid bacteria
And water, do not result in the pollution of place and surrounding environment；Then as unit cell polysaccharide, itself can be added xanthans as food
Agent, and can by natural environment in various enzymes degrade；Micron iron powder will not have due to moderate in grain size as nanometer iron powder
There is biological toxic action, it can change into divalence and ferric ion after pollutant is repaired in reduction, to surrounding soil and water body
Harm, non-secondary pollution are not produced.It can be seen that the present invention can realize the treatment of wastes with processes of wastes against one another, with good economy and environmental benefit.
Brief description of the drawings
Fig. 1 is that contaminated site construction method process chart is repaired in the injection in situ of environmentally friendly medicament.
Fig. 2 is the operating principle figure that medicament is injected and stirring is constructed.
Fig. 3 is that medicament injects and stir the sealing of hole maintenance effect schematic diagram after the completion of construction.
Fig. 4 is medicament injection construction point bit plane arrangement schematic diagram.
Wherein have：Compacted cohesive soil layer 1；Uncontamination stratum 2；Pollution stratum 3；Vertical divider wall 4；Impermeable stratum 5；Contaminated area
Domain 6；Construction equipment 7；Shower nozzle 8；Medicament is efficiently injected into region 9；Construction hole 10；Anti-seepage geomembrane 11；Geotechnological cloth bag 12；Injection is applied
Work point position 13.
Specific embodiment
Below in conjunction with accompanying drawing, further detailed description is done to technical scheme.
In the present embodiment administer contaminated site in, pollutant be Cr VI, can be by the chlorinated organics of deoxidization, degradation
Or the mixing of the two, and pollutant accounts for more than the 0.01% of place soil and groundwater gross mass.As shown in figure 1, of the invention
The construction method of contaminated site is repaired in the injection in situ of a kind of environmentally friendly medicament of embodiment, is comprised the following steps：
Step 10) carry out lab scale experiment：The lab scale experiment of contaminated site scene is carried out for medicament, in the reparation point position of design
Testing site is set with depth, medicament injection pressure, mixing time, injection length, Optimizing construction point arrangement density is determined.
The lab scale experiment of contaminated site scene is carried out for medicament before construction, sets some in the reparation point position of design and depth
Testing site, is injected and is stirred the EFFECTIVE RANGE of medicament with the construction equipment for determining used, and then optimizes optimal medicament note
Enter pressure, stirring and injection length, reasonable adjusting stirring decanting point position layout density.When whole place intends repairing stratum infiltration system
During number difference smaller (difference is less than 1 order of magnitude), manufacturability lab scale testing site quantity is advisable with 1~2；And work as place and intend repairing
Multiple stratum osmotic coefficient differ greatly (difference is more than 1 order of magnitude) when, should according to the distribution situation on different infiltration coefficient stratum,
It is appropriate to increase testing site, to ensure all typical stratum of manufacturability lab scale experiment covering.Construction equipment can use unidirectional or two-way
Stirring injection stake machine.
Step 20) construct vertical divider wall：Vertical partition wall construction is carried out around Polluted area；The divider wall is along deep
Degree runs through whole area to be repaired stratum, and is embedded in the bottom impermeable stratum on area to be repaired stratum.
Vertical partition wall construction is carried out around contaminated site Polluted area, the stratum under medicament injection pressure is prevented effectively from
In pollutant to surrounding diffusion mobility, and cause the situation that Polluted area expands, and the oxygen that Groundwater Flow is caused is not
The disconnected situation for entering Polluted area.Isolation wall thickness is preferably 20~80cm, and infiltration coefficient is less than or equal to 5.0 × 10-8Cm/s, isolation
Wall should intend restoring area stratum along depth through whole, and embedded plan repairs more than the impermeable stratum 20cm under stratum, with dirt
The obturator of substantially impervious water is formed around dye region.
Step 30) in area to be repaired ground mulching compacted cohesive soil layer, the compacted cohesive soil layer is connected with divider wall.
Preferably, compacted cohesive soil thickness degree is not less than 50cm, compactness is more than 90%, and infiltration coefficient is less than or equal to 10- 7Cm/s, and be connected with vertical divider wall around Polluted area, form integrally closed system.The setting of compacted cohesive soil layer can be effective
The frost boiling phenomenon in medicament injection process is avoided, and for construction equipment provides effective scope of operation, while also can effectively reduce medicament
Spilling loss in adjacent ground surface stratum.Compacted cohesive soil layer also can effectively prevent stirring injection ram machine construction process and place
Oxygen during maintenance in air enters restoring area.Preferably, compacted cohesive soil layer edge exceeds vertical divider wall outward flange
Distance is more than or equal to 1.0m.
Step 40) to injection construction point position positioning, and it is other that construction equipment is located in into construction point position.
Preferably, in step 40) in, 2 times of the medicament that is smaller than of adjacent construction point position injects and having after stirring
Effect operating distance.Adjacent construction point column pitch is less than the EFFECTIVE RANGE that 2 times of medicaments inject and stir, to ensure having for injection
The effect zone of action is overlapped, it is to avoid medicament occur cannot be efficiently injected into the region of covering.Therefore, adjacent construction point column pitch should
Between 1 times~2 times of the EFFECTIVE RANGE of medicament.Injection construction point position fixed point tolerance is less than or equal to 50mm, applies
Construction equipment borehole perpendicularity tolerance is less than or equal to 1.0%, and construction point position drilling diameter tolerance is less than or equal to 20mm, applies
Work point position injection depth tolerance is less than or equal to 100mm.
Step 50) injection blackstrap and acetic acid bacteria mixed solution：In construction point position, injection blackstrap in situ and acetic acid bacteria are mixed
Solution is closed, and is stirred with contaminated soil and underground water Forced Mixing.
Step 60) sealing of hole is carried out to construction point position：After the construction of single construction point position terminates, by what is formed in work progress
Construction hole is blocked.Specifically, after the completion of the construction of single construction point position, by the construction hole of formation filling bentonitic soil
Work cloth bag is blocked, and geotechnological cloth bag is carried out after closure soak treatment, using bentonite water-swellable and hypotonicity characteristic
Effective seal construction hole.Geotextiles bag length is advisable with 40cm, and cloth bag diameter is preferably advisable compared with construction big 2cm in hole or so.
Step 70) displacement construction equipment：Mobile construction equipment injects construction point position, and repeat step 50 to next) and step
It is rapid 60), until completing the injection of blackstrap and acetic acid bacteria mixed solution and the sealing of hole in construction hole to whole construction points position.
Step 80) anti-seepage geomembrane is set on compacted cohesive soil layer upper berth, the anti-seepage geomembrane is connected with divider wall.
After blackstrap and acetic acid bacteria mixed solution injection whole construction point position, laid on compacted cohesive soil coating immediately
Anti-seepage geomembrane, and being connected with the vertical divider wall in area to be repaired periphery, surrounding and overall envelope is formed in area to be repaired up and down
Closure system, it is understanding and considerate with air stream with the caused restoring area obturator of clay coating cracking during avoiding early stage slip casing by pressure
Condition, prevents oxygen during the maintenance after blackstrap and the injection of acetic acid bacteria mixed solution from entering area to be repaired from air, to have
The oxidation-reduction potential that effect reduces restoring area soil and groundwater provides advantage.Anti-seepage geomembrane can be poly- using low-density
Three kinds of ethene (LDPE) geomembrane, high density polyethylene (HDPE) (HDPE) geomembrane or ethylene-vinyl acetate copolymer (EVA) geomembrane
Form.Anti-seepage geomembrane edge is more than or equal to 1.0m beyond vertical divider wall outward flange distance.
Step 90) from area to be repaired, sampling detects acid-base value and oxidation-reduction potential：Drill through the soil of area to be repaired
And underground water, when the oxidation-reduction potential and acid-base value of soil and underground water meet sets requirement, into step 100)；When not
When meeting sets requirement, then anti-seepage geomembrane being covered again, being conserved, whether detection acid-base value and oxidation-reduction potential meet
It is required that, if more than 7 days after the completion of the injection construction of blackstrap and acetic acid bacteria mixed solution, acid-base value and oxidation-reduction potential
When still being unsatisfactory for requiring, then restart step 50)~step 80), until the oxidation of area to be repaired soil and underground water is also
Former current potential and acid-base value meet sets requirement.Preferably, sets requirement refers to：Oxidation-reduction potential less than or equal to-
100mV, pH value is between 2.5~5.0.
Step 100) injection micron iron powder and xanthans mixed solution：Micron iron powder and xanthans are injected in area to be repaired
Mixed solution, and stirred with contaminated soil and underground water Forced Mixing.Inject point arrangement and require and step 40) it is identical.
Step 110) to construction point position sealing of hole：After the completion of the construction of single construction point position, the construction hole of formation is blocked.
After the completion of the construction of a single point position, the construction hole of formation is blocked with filling bentonitic geotechnological cloth bag immediately,
Geotechnological cloth bag carried out after closure soak treatment, using bentonite water-swellable and the effective seal construction hole of hypotonicity characteristic.
Geotextiles bag length is advisable with 40cm, and cloth bag diameter is preferably advisable compared with construction big 2cm in hole or so.
Step 120) construction equipment displacement：Transfer construction equipment to next pressure injects construction point position, repeat step 10) and
Step 110), until completing injection stirring construction and the construction hole of the micron iron powder and xanthans mixed solution of whole construction point positions
Sealing of hole.
Step 130) in area to be repaired ground mulching anti-seepage geomembrane：The micron iron powder and xanthans of whole construction point positions
After the completion of mixed solution injection stirring construction, in step 30) in compacted cohesive soil coating upper berth set anti-seepage geomembrane, and with treat
The vertical divider wall connection of restoring area periphery, surrounding and integrally closed system is formed in area to be repaired up and down.
Step 130) integrally closed system is formed in restoring area surrounding and up and down, to avoid step 10) in work progress
Aerial oxygen enters restoring area caused by the clay coating cracking for causing, and keeps the oxidation-reduction potential of restoring area to be in
Reduced levels, it is ensured that the reducing power and efficiency of micron iron powder, favourable bar is provided efficiently to reduce the pollutant in removal stratum
Part.Anti-seepage geomembrane can use low density polyethylene (LDPE) (LDPE) geomembrane, high density polyethylene (HDPE) (HDPE) geomembrane or ethene-vinegar
Three kinds of forms of sour ethylene copolymer (EVA) geomembrane.Anti-seepage geomembrane edge beyond vertical divider wall outward flange distance more than etc.
In 1.0m.
Used as preference, above-mentioned construction method also includes：Step 140) inspection contaminated site repairing effect：Step 130)
After construction is completed 7 days, area to be repaired soil and underground water are drilled through, check repairing effect；Pollution in soil and underground water
When the content of thing is less than desired value is repaired, and during acid-base value satisfaction 6.5≤pH value≤7.5, reparation terminates.Described reparation target
It is worth the content≤2mg/kg or 0.1mg/L for pollutant.When pollutant load is higher than desired value is repaired in soil and underground water,
Repeat step 50)~step 110)；When pollutant load is less than reparation desired value, but acid-base value pH value ＜ in soil and underground water
When 6.5, continue with divider wall, compacted cohesive soil layer, anti-seepage geomembrane carries out isolation curing in airtight condition to restoring area so that acetic acid
Bacterium further aoxidizes acetic acid for carbon dioxide and water, until area to be repaired soil and underground water acid-base value meet 6.5≤pH value
≤7.5。
Further, described step 50) and step 100) in, the grouting pressure of construction equipment is between 0.5~30MPa；
Shower nozzle on construction equipment drilling tool in polluting stratum along depth it is upper and lower during persistently whitewash and stir, it is to avoid once whitewash
Uneven situation occur.Specific slip casing by pressure whipping process is as follows：The drilling tool and shower nozzle of construction equipment first enter down place ground
Layer, whitewashing is carried out after the upper limit for reaching design reparation depth while rotary tools blade cuts soil sinking repairs deep until designing
Degree lower limit, hereafter repairs in design and is stayed for some time at depth limit, and continues whitewashing stirring, and another side whitewashing stirring is on one side
Lifting, until shower nozzle and drilling tool blade are promoted to more than earth's surface or reach design and repair upper depth limit above 50cm, completes single
The construction of injection construction point position.Within 5cm/min, speed is by electricity for shower nozzle and drilling tool subsidence velocity, lifting speed control error
The current detector control of machine.
In above-described embodiment, described step 50) in, in blackstrap and acetic acid bacteria mixed solution, by butt quality percentage
Number is composed of the following components：
Blackstrap：98.2%；
Acetic acid bacterium powder：1.8%.
Used as a preference, described blackstrap is the waste liquid of generation during industry sugaring, containing sugar in waste liquid, wherein,
Sugar content >=25%, water content≤75%.Used as another preference, described waste liquid also contains alcohol, and alcohol content≤
22%.Acetic acid bacterium powder is that the industrial bacterium of vinegar processed is bent, and it is made by being adsorbed by drying after vacuum concentration, is Acetobacter, with general
Acetic acid and alcohol are further oxidized to the ability of carbon dioxide and water, and wherein active acetate bacterial content is more than or equal to 80%.
Described step 100) in, micron iron powder and xanthans mixed solution, by butt mass percent by following components
Composition：
Micron iron powder：83.8%~97.7%；
Xanthans：2.3%~16.2%.
Particle diameter≤300 μm of described micron iron powder, specific surface area >=0.01m2/g；There is reproducibility in micron iron powder
Mass content >=70% of iron powder；Described xanthans is technical grade or food-grade powder xanthans；The pH value of xanthans is 6.0
~8.0, purity >=85%, viscosity >=600mpas, water content≤15%, and particle diameter less than 0.2mm particle account for 98% with
On.
Example is as one example below.
As shown in Figure 2 to 4, construction equipment 7 is unidirectional or two-way stirring injection stake machine, and it can be applied according to the injection laid
The flexibly mobile construction of work point position 13, while the grouting pressure of construction equipment 7 should be between 0.5~30MPa.The live lab scale of medicament
Test objective is the optimal medicament injection pressure of optimization, stirring and injection length, the cloth of reasonable adjusting stirring injection construction point position 13
If density, it is determined that the construction equipment 7 for being used injects and stirs the EFFECTIVE RANGE r of medicament.Should be according to not in practical operation
With the distribution situation on the pollution stratum 3 of infiltration coefficient, suitably increase testing site, to ensure all different infiltration coefficients impurely
Layer 3 has at least one manufacturability lab scale testing site position.
Divider wall 4 should run through the uncontamination stratum 2 of whole pollution stratum 3 and its overlying, and embedded pollution stratum 3 along depth
Under impermeable stratum 5 in more than 20cm, to form the obturator of substantially impervious water around the Polluted area 6 in stratum is polluted,
To be prevented effectively from step 50) and step 100) in pollutant in stratum 3 is polluted during slip casing by pressure to surrounding diffusion mobility
And cause the situation of Polluted area expansion, and starvation enters the situation in pollution stratum 3 in Polluted area 6.
And the top of Polluted area 6 is also carried out Seal treatment, compacted cohesive soil layer is covered in the earth's surface of uncontamination stratum 2 of overlying
1, and be connected with vertical divider wall 4 around Polluted area 6, to form surrounding and up and down integrally closed system.Compacted cohesive soil layer 1
The frost boiling phenomenon that can be prevented effectively from medicament injection process of setting and for construction equipment 7 provides effective scope of operation, while also can
Effectively reduce spilling loss of the medicament at the earth's surface of uncontamination stratum 2.In addition compacted cohesive soil layer 1 also can effectively prevent construction from setting
Oxygen during standby 7 (stirring injection stake machine) work progress and place maintenance in air enters Polluted area 6.
Accuracy is should be noted that in the positioning and the work progress of construction equipment 7 of injection construction point position 13, wherein injecting construction point
Position 13 pinpoints tolerance and is less than or equal to 50mm, and the borehole perpendicularity tolerance of construction equipment 7 is less than or equal to 1.0%, and injection is applied
13 drilling diameter tolerances of work point position are less than or equal to 20mm, and point position injection depth tolerance is less than or equal to 100mm.
In design injection construction point position 13 using injection blackstrap and the acetic acid bacteria mixed solution in situ of construction equipment 7, medicament
Solution by drilling tool and shower nozzle 8 enter contaminated soil and underground water and with its Forced Mixing so that medicament is effectively made into medicament
It is with region 9 and dispersed in medicament useful effect region 9, and then effectively contacted with pollutant.The construction of a single point position is completed
Afterwards, the construction hole 10 of formation is blocked with filling bentonitic geotechnological cloth bag 12 immediately, geotechnological cloth bag 12 is entered after closure
Row soaks treatment, using bentonite water-swellable and the effective seal construction hole 10 of hypotonicity characteristic.Complete a single point position
After construction, construction equipment 7 to next pressure injection construction point position 13 is moved immediately, repeat construction procedure 50) and step 60), directly
To the injection stirring construction and point position sealing of hole work of the blackstrap and acetic acid bacteria mixed solution for completing whole construction point positions.
After the completion of the injection construction of all blackstrap of injection construction point position 13 and acetic acid bacteria mixed solution, immediately in pressure
The upper berth of real clay layer 1 sets anti-seepage geomembrane 11, and is effectively connected with the vertical divider wall 4 in restoring area periphery, in the pollution repaired
The surrounding of region 6 and up and down formation integrally closed system, it is caused with the cracking of compacted cohesive soil layer 1 during avoiding early stage slip casing by pressure
The obturator of Polluted area 6 and air circulation situation, prevent oxygen during the maintenance after blackstrap and the injection of acetic acid bacteria mixed solution
Enter Polluted area 6 from air, for the oxidation-reduction potential for effectively reducing the soil and groundwater of Polluted area 6 provides favourable bar
Part.
Hereafter the soil and underground water of Polluted area 6, oxidation-reduction potential and acid in detection soil and underground water are drilled through
Basicity situation of change, when oxidation-reduction potential and acid-base value (pH value) are reduced to satisfaction to be required, starts next step construction, is discontented with
Then covering anti-seepage geomembrane 11 maintenance to satisfaction is required again when foot is required, when the injection of blackstrap and acetic acid bacteria mixed solution is applied
When still being unsatisfactory for requiring more than 7 days after the completion of work, restart step 50)~step 80), it is useless in restoring area injection again
Molasses and acetic acid bacteria mixed solution, and cover anti-seepage geomembrane 11 and conserve, until the oxidation of the soil of Polluted area 6 and underground water is also
Former current potential and acid-base value meet requirement.The oxidation-reduction potential for wherein requiring should be less than being equal to -100mV, pH value should 2.5~
Between 5.0.
Then micron iron powder and xanthans mixed solution are injected in Polluted area 6, and it is strong with contaminated soil and underground water
System is mixed.Lay and require with step 40 in injection construction point position 13).It is same after the completion of the construction of a single point position, immediately
The construction hole 10 of formation is blocked with filling bentonitic geotechnological cloth bag 12, geotechnological cloth bag 12 is carried out soaking place after closure
Reason, using bentonite water-swellable and the effective seal construction hole 10 of hypotonicity characteristic.Persistently shifted in construction construction equipment 7 to
Next pressure injection construction point position 13, repeats construction procedure 100) and step 110), until completing all injection construction point positions 13
Micron iron powder and xanthans mixed solution injection stirring construction and point position sealing of hole work.
After the completion of all the micron iron powder of point position and the injection stirring of xanthans mixed solution are constructed, immediately in compacted cohesive soil layer
1 upper berth sets anti-seepage geomembrane 11, and is effectively connected with the vertical divider wall 4 in the periphery of Polluted area 6, the surrounding of Polluted area 6 and on
Lower formation integrally closed system, to avoid step 100) aerial oxygen caused by the cracking of compacted cohesive soil layer 1 that causes in work progress
Gas enters Polluted area 6, keeps the oxidation-reduction potential of Polluted area 6 to be in reduced levels, it is ensured that the also proper energy of micron iron powder
Power and efficiency, advantage is provided efficiently to reduce the pollutant in removal stratum.
Step 130) after construction completes 7 days, drill through the soil of Polluted area 6 and underground water, check repairing effect.When soil and
When the content of the pollutant in underground water is less than desired value (≤2mg/kg or 0.1mg/L) is repaired, and acid-base value meets requirement
(6.5≤pH value≤7.5), reparation terminates；When pollutant load is higher than desired value is repaired in soil and underground water, repeat step
5)~step 11)；When pollutant load is too low less than reparation desired value, but acid-base value in soil and underground water, continue with
Vertical divider wall 4, compacted cohesive soil layer 1, anti-seepage geomembrane 11 carries out isolation curing in airtight condition to Polluted area 6 so that acetic acid bacteria enters
One step oxidation acetic acid is carbon dioxide and water, and then recovers the acid-base value on Polluted area 6 and pollution stratum 3.
As shown in Fig. 2 a positions are to enter to reach under drilling tool and shower nozzle after the upper limit of depth is repaired in design to start whitewashing；B positions
For in whitewashing, rotary tools blade cuts native sinking；C positions are to repair stopped at depth limit and continue whitewashing stirring in design
For a period of time；D positions are to be lifted when stirring is whitewashed；E positions are that shower nozzle and drilling tool blade are promoted to more than earth's surface or reach and set
Meter repairs upper depth limit above 50cm, completes the construction of a single point position.
As shown in Fig. 2 stirring vane and shower nozzle 8 on the drilling tool of construction equipment 7 in stratum 3 is polluted along the mistake up and down of depth
Persistently whitewashed in journey and stirred, it is to avoid the uneven situation once whitewashed occurs.Specific slip casing by pressure whipping process is as follows：
A. the drilling tool of construction equipment 7 and shower nozzle 8 first enter to pollute stratum 3 and reach repair capsule upper depth limit down；
B. drilling tool and shower nozzle 8 carry out whitewashing while the sinking of rotary cutting soil was sunk up to depth limit is repaired in design
Journey medium velocity control errors are in 5cm/min；
C. drilling tool and shower nozzle 8 are repaired in design and stayed for some time at depth limit, and continue whitewashing stirring, it is desirable to stopped
Time is in 30s or so；
D. drilling tool and shower nozzle 8 whitewash stirring while being lifted up, lifting process medium velocity control errors are in 5cm/
min；
E. drilling tool and shower nozzle 8 are promoted to more than earth's surface or reach design and repair upper depth limit above 50cm, complete a single point
The construction of position.
As shown in figure 3, the vertical divider wall 4 that sets of the sealing of hole maintenance processes after the completion of medicament injection and stirring construction it is thick
Degree is preferably 20~80cm, and infiltration coefficient is less than or equal to 5.0 × 10-8cm/s；And anti-seepage geomembrane 11 can use low density polyethylene (LDPE)
(LDPE) geomembrane, three kinds of shapes of high density polyethylene (HDPE) (HDPE) geomembrane or ethylene-vinyl acetate copolymer (EVA) geomembrane
Formula, its water vapor permeability coefficients are less than or equal to 1.0 × 10-16g·cm/cm·s·pa；The thickness of compacted cohesive soil layer 1 is not less than
50cm, compactness is more than 90%, and infiltration coefficient is less than or equal to 10-7Cm/s, compacted cohesive soil 1 edge of layer is outside vertical divider wall 4
The distance at edge is more than or equal to 1.0m；The edge of anti-seepage geomembrane 11 is more than or equal to 1.0m beyond the outward flange of vertical divider wall 4 distance；
The length of geotechnological cloth bag 12 is advisable with 40cm, the diameter of geotechnological cloth bag 12 preferably relatively construction big 2cm in hole 10 or so.
It should be specifically noted that the horizontal layout of medicament injection construction point position, as shown in figure 4, the injection construction point in same row
In position 13, the useful effect region 9 of two neighboring injection construction point position 13 should intersect；13 phases of injection construction point position of adjacent two row
Mutually dislocation is laid, and should be intersected between the useful effect region 9 of the construction point position 13 of adjacent two row.The phase of injection construction point position 13
The EFFECTIVE RANGE r that medicaments of the adjoint point column pitch R less than 2 times injects and stir, i.e. consecutive points column pitch R should be between r and 2r
Between, cannot be efficiently injected into the region of covering to avoid the occurrence of medicament.
The basic principles, principal features and advantages of the present invention have been shown and described above.Those skilled in the art should
Understand, the present invention do not limited by above-mentioned specific embodiment, the description in above-mentioned specific embodiment and specification be intended merely into
One step illustrates principle of the invention, without departing from the spirit and scope of the present invention, the present invention also have various change and
Improve, these changes and improvements all fall within the protetion scope of the claimed invention.The scope of protection of present invention will by right
Ask book and its equivalent thereof.
Claims (10)
1. the construction method of contaminated site is repaired in a kind of environmentally friendly medicament injection in situ, it is characterised in that the construction method
Comprise the following steps：
Step 10）Carry out lab scale experiment：The lab scale experiment of contaminated site scene is carried out for medicament, in the reparation point position of design and depth
Degree sets testing site, determines medicament injection pressure, mixing time, injection length, Optimizing construction point arrangement density；
Step 20）Construct vertical divider wall：Vertical partition wall construction is carried out around Polluted area；The divider wall is passed through along depth
Whole area to be repaired stratum is worn, and is embedded in the bottom impermeable stratum on area to be repaired stratum；
Step 30）In area to be repaired ground mulching compacted cohesive soil layer, the compacted cohesive soil layer is connected with divider wall；
Step 40）Injection construction point position is positioned, and construction equipment is located in construction point position；
Step 50）Injection blackstrap and acetic acid bacteria mixed solution：In construction point position, injection blackstrap in situ and acetic acid bacteria mixing are molten
Liquid, and stirred with contaminated soil and underground water Forced Mixing；
Step 60）Sealing of hole is carried out to construction point position：After the construction of single construction point position terminates, the construction that will be formed in work progress
Hole is blocked；
Step 70）Displacement construction equipment：Mobile construction equipment injects construction point position, and repeat step 50 to next）And step
60）, until completing injection and the sealing of hole in construction hole of blackstrap and acetic acid bacteria mixed solution to whole construction points position；
Step 80）Anti-seepage geomembrane is set on compacted cohesive soil layer upper berth, the anti-seepage geomembrane is connected with divider wall；
Step 90）From area to be repaired sampling detection acid-base value and oxidation-reduction potential：Drill through the soil and ground of area to be repaired
Lower water, when the oxidation-reduction potential and acid-base value of soil and underground water meet sets requirement, into step 100）；When being unsatisfactory for
During sets requirement, then anti-seepage geomembrane is covered again, conserved, detect whether acid-base value and oxidation-reduction potential meet and want
Ask, if more than 7 days after the completion of the injection construction of blackstrap and acetic acid bacteria mixed solution, acid-base value and oxidation-reduction potential are still
When being unsatisfactory for requiring, then restart step 50）~step 80）, until the redox of area to be repaired soil and underground water
Current potential and acid-base value meet sets requirement；
Step 100）Injection micron iron powder and xanthans mixed solution：Micron iron powder and xanthans mixing are injected in area to be repaired
Solution, and stirred with contaminated soil and underground water Forced Mixing；
Step 110）To construction point position sealing of hole：After the completion of the construction of single construction point position, the construction hole of formation is blocked；
Step 120）Construction equipment is shifted：Transfer construction equipment to next pressure injects construction point position, repeat step 10）And step
110）, until completing injection stirring construction and the construction hole envelope of the micron iron powder and xanthans mixed solution of whole construction point positions
Hole；
Step 130）In area to be repaired ground mulching anti-seepage geomembrane：The micron iron powder of whole construction point positions and xanthans mixing
After the completion of solution injection stirring construction, in step 30）In compacted cohesive soil coating upper berth set anti-seepage geomembrane, and with it is to be repaired
The connection of area peripheral edge vertical divider wall, surrounding and integrally closed system is formed in area to be repaired up and down.
2. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 1
It is also to include：
Step 140）Inspection contaminated site repairing effect：Step 130）After construction is completed 7 days, area to be repaired soil and ground are drilled through
Lower water, checks repairing effect；When the content of the pollutant in soil and underground water is less than desired value is repaired, and acid-base value meets
During 6.5≤pH value≤7.5, reparation terminates；When pollutant load is higher than desired value is repaired in soil and underground water, repeat step
50）~step 110）；When pollutant load is less than reparation desired value in soil and underground water, but during acid-base value pH value ＜ 6.5, after
Continuous maintenance, until area to be repaired soil and underground water acid-base value meet 6.5≤pH value≤7.5.
3. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 2
It is that described reparation desired value is content≤2 mg/kg or 0.1 mg/L of pollutant.
4. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 1
It is, step 40）In, 2 times of the medicament that is smaller than of adjacent construction point position injects and the EFFECTIVE RANGE after stirring.
5. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 1
It is, step 90）In, sets requirement refers to：Oxidation-reduction potential is less than or equal to -100 mV, and pH value is between 2.5~5.0.
6. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 1
It is, described step 50）In, it is composed of the following components by butt mass percent in blackstrap and acetic acid bacteria mixed solution：
Blackstrap：98.2%；
Acetic acid bacterium powder：1.8%.
7. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 6
It is that described blackstrap is the waste liquid of generation during industry sugaring, containing sugar in waste liquid, wherein, sugar content >=25% is aqueous
Amount≤75%.
8. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 7
It is that described waste liquid also contains alcohol, and alcohol content≤22%.
9. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 1
It is, described step 100）In, micron iron powder and xanthans mixed solution, by butt mass percent by following components group
Into：
Micron iron powder：83.8 %~97.7 %；
Xanthans：2.3 %~16.2 %.
10. the construction method of contaminated site, its feature are repaired according to the environmentally friendly medicament injection in situ described in claim 9
It is, particle diameter≤300 μm of described micron iron powder, specific surface area >=0.01 m2/g；There is reproducibility in micron iron powder
Mass content >=70% of iron powder；Described xanthans is technical grade or food-grade powder xanthans；The pH value of xanthans is 6.0
~8.0, purity >=85%, viscosity >=600 mpa s, water content≤15%, and particle of the particle diameter less than 0.2 mm accounts for more than 98%.
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| CN109279701A (en) * | 2018-09-21 | 2019-01-29 | 中国海洋大学 | The reparation medicament and its preparation method and application of chlorohydrocarbon in a kind of removal underground water |
| CN110713248A (en) * | 2019-10-16 | 2020-01-21 | 北京高能时代环境技术股份有限公司 | Underground water atmospheric chemical oxidation injection device |
| CN111175185A (en) * | 2019-12-31 | 2020-05-19 | 同济大学 | Centrifuge test fluid injection device |
| CN111872095A (en) * | 2020-06-19 | 2020-11-03 | 四川轻化工大学 | Flexible bushing and pollution site monitoring method combined with flexible bushing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107159697A (en) * | 2017-07-24 | 2017-09-15 | 河北煜环环保科技有限公司 | A kind of organic polluted soil and groundwater remediation method and medicament |
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| CN111872095A (en) * | 2020-06-19 | 2020-11-03 | 四川轻化工大学 | Flexible bushing and pollution site monitoring method combined with flexible bushing |
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