CN110205134A - Medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair - Google Patents
Medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair Download PDFInfo
- Publication number
- CN110205134A CN110205134A CN201910628750.6A CN201910628750A CN110205134A CN 110205134 A CN110205134 A CN 110205134A CN 201910628750 A CN201910628750 A CN 201910628750A CN 110205134 A CN110205134 A CN 110205134A
- Authority
- CN
- China
- Prior art keywords
- gelling agent
- soil
- aqueous solution
- stabilizer
- medicament
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to technical field of soil remediation, and in particular to the medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair.Medicament provided by the invention includes the stabilizer and gelling agent independently dispensed, and the stabilizer includes sodium metasilicate, and the gelling agent includes calcium chloride and/or magnesium chloride.After repairing using above-mentioned medicament to cadmium pollution soil, cadmium ion is not detected in soil body percolate, concentration is in 0.13mg/L or less in acid leaching liquor.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular to using Filling Principle cadmium pollution soil repair medicament and
Utilize the method for Filling Principle cadmium pollution soil repair.
Background technique
There are many existing soil restoring technologies, can be divided into peripheral doses, chemical remediation and biological prosthetic three according to principle
Class, wherein peripheral doses include direct soil replacement method, thermalization method, vitrifying repairing method, electrode drive repairing method；Chemical remediation includes
Solidification-stabilizing method, elution method and oxidation-reduction method；It is biological prosthetic to include phytoremediation, microorganism remediation and bio combined repair
The technologies such as multiple.
Although above-mentioned restorative procedure can alleviate soil contamination problem to a certain extent, there are different journeys in governance process
The defect of degree, such as direct soil replacement method soil replacement works amount is big, and contaminated soil disposition is difficult, costly, is equivalent to and digs the eastern wall to repair the western one,
It is difficult to large-scale application；Thermalization method energy consumption is high, limits the application of the method；Vitrifying restorative procedure needs high temperature and pressure, equally
There are problems that energy consumption is high, higher cost；Electrode drive repairing method is only applicable to the higher soil of humidity, needs to expend a large amount of electricity
Can, higher cost, and there is certain risk.
Solidification-stabilization technology is to fix pollutant in pollution medium, is at chronic steady state, is more general
All over the quick control restorative procedure for being applied to heavy metal pollution of soil, have to various heavy combined contamination soil is handled simultaneously
Apparent advantage；The disadvantage is that treated, soil volume increases, and needs to remove rubble or underground obstacle before engineering construction, dirty
Dye object is difficult to be uniformly mixed with gelling agent；Elution technique is by water or aqueous solution, acid-base solution, complexing agent containing rinse aid
Or the eluents such as surfactant are injected into contaminated soil or deposit, a kind of reparation of elution and cleaning pollutant in soil
Method, the deficiency of this method are that eluent medicament is generally expensive, it is difficult to be promoted the use of, and project amount is big, there are secondary dirts
The risk of dye；Oxidationreduction technology is by adding chemical oxidizing agent, such as ozone, hydrogen peroxide, potassium permanganate into soil
Deng or reducing agent, such as SO2, FeO, gaseous state H2S etc. makes it occur to chemically react the mesh to realize purification soil with polluter
's.In general, chemical oxidization method is suitable for soil and groundwater simultaneously by the reparation of organic pollution, use scope is relatively narrow, expense
It is higher, medicament pollution risk is larger.
Biological restoration has the advantages of easy to operate, at low cost, few to environmental perturbation, not easily cause secondary pollution, but this
The repairing efficiency of kind method is long, and the requirement to repairing condition is more harsh, is easy to be influenced by external environment variation, and nothing
Method repairs heavy-metal contaminated soil.
To sum up, the generally existing economic cost of existing soil restoring technology or the excessively high problem of time cost, soil remediation
Technology improves there is still a need for further.
Summary of the invention
It is repaired the purpose of the present invention is to provide the medicament using Filling Principle cadmium pollution soil repair and using Filling Principle
The method of multiple cadmium pollution soil, medicament provided by the invention can react with soil particle, moisture and the cadmium ion in soil, make
Medicament, soil particle and cadmium ion solidification are integrated, and are realized filling, are solidified the purpose of cadmium pollution soil, and then reach reparation effect
Fruit.
To achieve the goals above, the invention provides the following technical scheme:
The present invention provides a kind of medicament using Filling Principle cadmium pollution soil repair, including the stabilizer that independently dispenses and
Gelling agent, the stabilizer include sodium metasilicate, and the gelling agent includes calcium chloride and/or magnesium chloride.
Preferably, the mass ratio of the stabilizer and gelling agent is 20:(3~25).
Preferably, the mass ratio of the stabilizer and gelling agent is 20:(10~23).
Preferably, when gelling agent includes calcium chloride and magnesium chloride, the mass ratio of the calcium chloride and magnesium chloride is 1:
(0.1~0.5).
Preferably, when gelling agent includes calcium chloride and magnesium chloride, the mass ratio of the calcium chloride and magnesium chloride is 1:
(0.2~0.4).
The present invention provides a kind of methods using Filling Principle cadmium pollution soil repair, comprising the following steps:
Stabilizer and gelling agent described in above-mentioned technical proposal are configured to aqueous solution respectively, obtain stabilizer aqueous solution and
Gelling agent aqueous solution；
The gelling agent aqueous solution and stabilizer aqueous solution are successively alternately injected in the soil of cadmium pollution, is conserved.
Preferably, the mass concentration of the stabilizer aqueous solution is 15~25%.
Preferably, the mass concentration of the gelling agent aqueous solution is 18~24%.
Preferably, when injection, the group of last time injection is divided into stabilizer aqueous solution.
Preferably, stabilizer aqueous solution and gelling agent aqueous solution injection total volume are the 25~50% of soil body volume.
The present invention provides a kind of medicaments using Filling Principle cadmium pollution soil repair, including the stabilizer independently dispensed
And gelling agent, the stabilizer include sodium metasilicate, the gelling agent includes calcium chloride and/or magnesium chloride.The present invention by sodium metasilicate,
Calcium chloride and/or magnesium chloride are used in compounding, and under the collective effect of stabilizer and gelling agent, contaminated soil will form precipitating and glue
Body, between soil particle crack and small gap fill, increase the compactness of the soil body, be greatly lowered pollution the soil body infiltration
Saturating rate achievees the purpose that quick cadmium pollution soil repair to cut off or significantly cut down pollution sources.Embodiment the result shows that,
Medicament stock used in the present invention is easily obtained, and reduces the cost of soil remediation, and filling, solidification effect are good, and the soil body seeps after reparation
Cadmium ion is not detected in filtrate, concentration is in 0.13mg/L or less in acid leaching liquor.
The present invention also provides a kind of filling restorative procedures of heavy-metal contaminated soil can be to dirt using above-mentioned medicament
The soil body of dye cadmium ion is efficiently filled, and pack completeness reaches 96.9~99.3%, effectively inhibits the expansion of heavy metal cadmium ion
It dissipates, plays protection land resource and groundwater resources.
Detailed description of the invention
Fig. 1 soil body repairing effect device for testing structural schematic diagram provided by the invention；
In figure, 1- pharmacy jar；2- distills water pot；3- triple valve；4- bankets column；5- drenches liquid reception device；The method of 6- sieve pore
It is blue；7- lid；8- triple valve；9- filtrate tank.
Specific embodiment
In the following detailed description, the Cd fractionation in cadmium pollution soil of the present invention is those skilled in the art
Well known water-soluble cadmium.
The present invention provides a kind of medicaments using Filling Principle cadmium pollution soil repair, including the stabilizer independently dispensed
And gelling agent, the stabilizer include sodium metasilicate, the gelling agent includes calcium chloride and/or magnesium chloride.
Medicament provided by the invention using Filling Principle cadmium pollution soil repair includes the stabilizer independently dispensed, described
Stabilizer includes sodium metasilicate.
Medicament provided by the invention using Filling Principle cadmium pollution soil repair includes independent packing gelling agent, the glue
Solidifying agent includes calcium chloride and/or magnesium chloride, preferably calcium chloride.When gelling agent includes calcium chloride and magnesium chloride, the chlorination
The mass ratio of calcium and magnesium chloride is preferably 1:(0.1~0.5), more preferably 1:(0.2~0.4).
In the present invention, the mass ratio of the stabilizer and gelling agent is preferably 20:(3~25), more preferably 20:(10
It~23) is further preferably, 20:(15~20).
Above stabilizer and gelling agent are used cooperatively by the present invention, can quickly be formed silica gel and be played cementing and filling pore
Effect, improves the intensity and bearing capacity of cadmium pollution soil.
The present invention provides a kind of methods using Filling Principle cadmium pollution soil repair, comprising the following steps:
Stabilizer and gelling agent described in above-mentioned technical proposal are configured to aqueous solution respectively, obtain stabilizer aqueous solution and
Gelling agent aqueous solution；
The gelling agent aqueous solution and stabilizer aqueous solution are successively alternately injected in the soil of cadmium pollution, is conserved.
Stabilizer and gelling agent described in above-mentioned technical proposal are configured to aqueous solution by the present invention respectively, obtain stabilizer water
Solution and gelling agent aqueous solution.In the present invention, the mass concentration of the stabilizer aqueous solution is preferably 15~25%；Further
, preferably controlled according to soil soil property:
For silt soil property, in the stabilizer aqueous solution, the mass concentration of sodium metasilicate is preferably 15~20%, more preferably
It is 16~19%, is further preferably 17~18%；
For sand soil property, in the sodium silicate aqueous solution, the mass concentration of sodium metasilicate is preferably 18~25%, more preferably
It is 19~24%, is further preferably 20~22%.
In the present invention, the manner of formulation of the stabilizer aqueous solution preferably mixes sodium metasilicate and water, obtains after stirring
Stabilizer aqueous solution.
In the present invention, the mixing preferably carries out under agitation, and the speed of the stirring and time are preferably to obtain
It is advisable to finely dispersed mixed liquor.
In the present invention, the mass concentration of the gelling agent aqueous solution is preferably 18~24%, and preferably 19~23%, then
Preferably 20~22%, specifically, can for 18%, 18.5%, 19%, 19.5%, 20%, 20.5%, 21%, 21.5%,
22%, 22.5%, 23%, 23.5% or 10%.In the present invention, the gelling agent is the mixture of calcium chloride and magnesium chloride
When, the mass concentration of the gelling agent aqueous solution refers to the gross mass of calcium chloride and magnesium chloride and the quality percentage of gelling agent aqueous solution
Than.
The present invention does not have particular/special requirement to the preparation method of the gelling agent aqueous solution, and gelling agent is mixed with water, makes glue
Solidifying agent dissolution.
After obtaining stabilizer aqueous solution and gelling agent aqueous solution, the present invention is water-soluble by the gelling agent aqueous solution and stabilizer
Liquid successively alternately injects in the soil of cadmium pollution, is conserved.The present invention contains Cadmium Pollutants On The Chinese in the soil of the cadmium pollution
No particular/special requirement is measured, therefore any soil body that need to be repaired by cadmium pollution is suitble to high concentration or low concentration cadmium pollution
Soil carries out repair process.
In the present invention, the stabilizer aqueous solution preferably injects in batches, and the batch is preferably divided 2~5 times, then excellent
It is selected as 3~4 times, the stabilizer aqueous solution quality of every batch of can be equal, can not also wait.In the present invention, the gelling agent
Aqueous solution preferably injects in batches, and each injection rate can be equal, can not also wait, batch number and stabilizer aqueous solution batch
Number matches, and last time injection group is made to be divided into stabilizer aqueous solution.In the present invention, the component injected for the first time is preferably
Gelling agent aqueous solution.
By taking 2 injections of stabilizer aqueous solution point as an example, alternately injection of the present invention refers to first injection part 1 gelling agent water
Solution, being then injected into part 1 stabilizer aqueous solution is a circulation, reinjects remaining gelling agent aqueous solution, is then poured into surplus
Remaining stabilizer aqueous solution is completed alternately to inject.
In the present invention, when stabilizer aqueous solution and gelling agent the concentration of aqueous solution concentration by adopting the above technical scheme
When, the stabilizer aqueous solution and gelling agent aqueous solution injection total volume are preferably the 25~50% of soil body volume, more preferably
30~50%.Soil body volume of the present invention is about to be worth, and can be calculated by pollutant diffusion area with diffusion depth.
After injecting stabilizer aqueous solution and gelling agent aqueous solution, the present invention conserves the soil body of injection medicament, makes medicine
Particle reaction in the soil of agent and cadmium pollution generates precipitating and colloid, fills the gap in soil, blocks the propagation of cadmium ion
Path, and then reach elimination cadmium pollution, the purpose of soil protection environment and groundwater environment.In the present invention, the maintenance
Time is preferably 5~7 days, and more preferably 6~7 days.
For the application effect for characterizing above-mentioned technical proposal, the present invention provides device as shown in Figure 1 and tests and examine:
In Fig. 1, the column 4 that bankets is placed vertically, for filling heavy-metal contaminated soil sample, the upper port and medicine of the column 4 that bankets
Agent tank 1 is connected with distillation water pot 2 by triple valve 3, and upper port is provided with the flange 6 and lid 7 of sieve pore；The column 4 that bankets
Lower port have leaching liquid receive container 5；Triple valve 8 receives container 5 for connecting the column 4 that bankets, filtrate tank 9 and leaching liquid.
The present invention also provides the application method of above-mentioned detection device, the application method is preferably included:
Pedotheque layer is layered in the column 4 that bankets, and successively tamped, it is then that the column 4 that bankets of filling soil sample is vertical
It is fixed；And the connecting components in the way of Fig. 1；
Communicating valve 3 is adjusted, makes to distill water pot 2 and 4 connected state of column that bankets；Adjust banket column 4 and leaching liquid reception device 5
For connected state；Distilled water is injected, filtering liquid is received, obtains initial infiltration liquid；
It is non-interconnected state between column 4 and leaching liquid reception device 5 that adjustment, which is banketed, and it is connected state that medicament, which fills 1 with the column 4 that bankets,
Partially stabilized dose of aqueous solution is injected into the column 4 that bankets, then partial gelation agent aqueous solution is injected into the column that bankets by pharmacy jar 1
In 4, is formed and alternately injected, then the repeatedly injection step of the injection step of stabilizer aqueous solution and gelling agent aqueous solution, finally
Primary injection stabilizer aqueous solution；After injection, the soil body is conserved；When maintenance, the lower valve of triple valve 8 is closed, side valve
Door is opened；
It adjusting and bankets column 4 and drench liquid reception device 5 for connected state, distillation water storage tank 2 is connected state with the column 4 that bankets,
It is injected into distilled water in the column 4 that bankets；The lower valve for adjusting triple valve 8 is opened, and side valve door is closed, and filtering liquid is collected, to repair
Penetrating fluid after multiple.
In the present invention, a huge sum of money in penetrating fluid after the regulation effect of the cadmium pollution soil preferably passes through pack completeness and repairs
Belong to content to be characterized.In the present invention, pack completeness is with permeameter before (fill before permeability-filling after permeability)/fill,
Soil body pack completeness >=96.9% after being repaired using medicament to cadmium pollution soil.
The present invention characterizes repairing effect preferably by infiltration coefficient, and the infiltration coefficient obtains by the following method:
Infiltration coefficient is tested to obtain by constant head permeability test.When testing as shown in Figure 1:, filling is cut in the column 4 that bankets
Face is S, and length is the sample of L, opens water valve, and water is made to flow through soil pattern from top to bottom, and from water outlet (column lower end of banketing
Mouthful) at be discharged.After head difference (△ h) and exudation flow (Q) are stablized, measurement is by flowing through soil pattern in certain time (t)
Water (V), then:
V=Qt=ν St；
According to Darcy's law, v=ki, then V=k (△ h/L) St, to obtain:
K=QL/ (S △ h)；
In above formula, v indicates seepage velocity, and k indicates that infiltration coefficient, i indicate hydraulic gradient, and Q indicates exudation flow, △ h table
Show head difference, L indicates soil body length.
In order to further illustrate the present invention, it is repaired with reference to the accompanying drawings and examples to provided by the invention using Filling Principle
It answers the medicament of cadmium pollution soil and is described in detail using the method for Filling Principle cadmium pollution soil repair, but cannot be by it
Be interpreted as limiting the scope of the present invention.
Embodiment 1
The filling of soil body test sample is carried out using one-dimensional Organic glass column, experimental provision is simulated as shown in Figure 1: in column specification
Diameter × length is 10cm × 20cm, and an equally distributed flange of sieve pore (internal diameter 0.2mm) is laid at column both ends, is then laid with one layer
Filter paper plays the role of water distribution uniformity and prevents anaerobic condition from revealing.Simulation column place vertically, solution from simulation column upper end
Into lower end sets out the mouth of a river；Test medium is added portionwise from column bottom and successively tamps, to avoid occurring being layered non-uniform phenomenon.
The permeability that the pollution soil body is surveyed using above-mentioned apparatus, specifically (is derived from Xinxiang cadmium pollution for soil body sample to be measured
Place) 8 pillars are filled, 3 are used to survey original permeability, and 5 for surveying the permeability after chemicals treatment；Use distilled water as leaching
Filtering agent carries out leaching, surveys earth pillar permeability, and initial 50mL leachate is taken to detect its pollutant load；By sodium silicate aqueous solution
The soil body is alternately injected with calcium chloride water；Then it conserves 7 days；During maintenance, the lower valve of triple valve 8 is closed, and side valve door is beaten
It opens；Before permeability test, the lower valve of triple valve 8 is opened, and side valve door is closed；Permeability test is carried out after maintenance, and is detected
Pollutant concentration in its leachate.
Using the shearing strength of the triaxial compression test measurement soil body, theoretical formula is used according to the Shear Strength Index of the soil body
Bearing capacity is calculated, shearing strength test is carried out to filling front and back soil body sample, the bearing capacity before and after observation soil body sample treatment becomes
Change.
Soil is derived from Xinxiang cadmium pollution place, water content: 7.0%, soil body available Cd initial concentration is 7.53mg/
Kg, the average value of original permeability are 326cm/d, and the leaching concentration of soil body cadmium is 7.12mg/L, primary particles composition: partial size
0.5~0.25mm, which accounts for 7.6%, 0.25~0.075mm and accounts for 51.3%, 0.075~0.005mm, accounts for accounting for for 34.7%, < 0.005mm
6.4%, beginning soil bearing capacity is 115kPa.
Sodium silicate aqueous solution and calcium chloride water are prepared respectively, and sodium silicate aqueous solution and calcium chloride water are alternately infused
Enter the soil body, specifically: the sodium silicate solution of 1/12 earth pillar volume is first injected, the calcium chloride solution of 1/12 earth pillar volume is reinjected,
It injects 3 times, is conserved 7 days under room temperature in turn, measuring its permeability is 8.7cm/d, is computed pack completeness and reaches 97.3%；After reparation
Cadmium is not detected in the leachate of the soil body, and the concentration of cadmium is 0.10mg/L in soil body water-leach liquor, lower than " household refuse landfill sites are dirty
Contaminate control standard " concentration limit 0.15mg/L as defined in (GB16889-2008).
The bio-available Zn concentration of cadmium is using " diethylene triamine pentacetic acid (DTPA) extraction-inductively coupled plasma body emits light in soil
Spectrometry " (HJ804-2016) measurement, the leachate of soil body cadmium is according to " solid waste Leaching leaching method acetate buffer is molten
Liquid method " (HJ/T 300-2007) prepared and measured.
The measurement of cadmium leachate under acid condition: by mass ratio be 2:1 the concentrated sulfuric acid and concentrated nitric acid Compound mixed solution at pH
The digestion agent that value is 3.2 or so, is immersed in 20h in the digestion agent for the soil body after maintenance, then cadmium in test gained pickling bath liquor
Concentration, i.e., using " solid waste Leaching leaching method sulfonitric method " (HJ/T299-2007) survey cadmium concentration.
It is 180kPa that its bearing capacity is calculated after over packing conserves.
Embodiment 2~5
Cadmium pollution soil sample is handled according to the method for embodiment 1, and stabilizer and gelling agent dosage are as shown in table 1.Wherein,
Gelling agent is calcium chloride: magnesium chloride=1:0.3 mixture in embodiment 2, and gelling agent is calcium chloride: magnesium chloride in embodiment 3
The mixture of=1:0.2.
Composition, dosage and its repairing effect of 1 Examples 1 to 5 medicament of table
By the test result of Examples 1 to 5 it is found that medicament provided by the invention is used for the reparation of cadmium ion contaminated soil
When, soil can be filled, be solidified, increase soil body compactness, reduced the permeability in contaminated soil region, reduce cadmium
Diffusion of the ion to other non-polluting regions or body of groundwater, and then achieved the effect that cadmium ion in stable soil, thus
Realize the reparation and improvement to cadmium ion contaminated soil.
Antiacid, external force performance test is carried out to the soil body after Examples 1 to 5 maintenance, test result shows through acid solution
After dipping, the concentration of soil body leachate cadmium is below " household refuse landfill sites contamination control standard " (GB16889-2008) regulation
Concentration limit 0.15mg/L；Under external force, conserve the soil body bearing capacity relatively handle before have a different degrees of raising, the soil body it is close
Solidity is not substantially change, is illustrated after being repaired using medicament provided by the invention to cadmium pollution soil, can be to acid, machine
Tool damage has good resistance, further illustrates medicament provided by the invention and filling method restorative procedure and adapts to environment
Property it is good, this method be suitble to large-scale promotion use.
By the content of above embodiments it is found that medicament provided by the invention and restorative procedure be on the basis of stabilized,
The hole and crack of cadmium pollution soil are filled, blocking pollution migrating channels, and makes soil particle in contaminated soil, repairs
Agent and heavy metal ion are cementing integral, are equivalent to multiple-protection, greatly reduce environmental risk, and external mechanical damage, acid
Property, alkalinity or other mal-conditions repairing effect of the present invention is influenced smaller, practicability is stronger.
Medicament stock provided by the invention is environmentally protective, and secondary environment risk is small；It is from a wealth of sources, reduce cost of material；
Contaminated soil is handled in situ in conjunction with filling method, rehabilitation expense is only 500~1200 yuan/m3, far below current
Repair price.
Cadmium pollution soil restorative procedure provided by the invention is simple, not the limitation in polluted soil region, is particularly suitable for using
It is easy to the pollution stratum migrated in pollutant, such as powder soil horizon, silty sand ground, fine sand layer and middle layer of sand carry out in-situ immobilization；It repairs
Curing time afterwards is short, reduces time cost.
Although above-described embodiment is made that detailed description to the present invention, it is only a part of the embodiment of the present invention,
Rather than whole embodiments, people can also obtain other embodiments under the premise of without creativeness according to the present embodiment, these
Embodiment belongs to the scope of the present invention.
Claims (10)
1. a kind of medicament using Filling Principle cadmium pollution soil repair, described including the stabilizer and gelling agent independently dispensed
Stabilizer includes sodium metasilicate, and the gelling agent includes calcium chloride and/or magnesium chloride.
2. medicament as described in claim 1, which is characterized in that the mass ratio of the stabilizer and gelling agent be 20:(3~
25)。
3. medicament as claimed in claim 2, which is characterized in that the mass ratio of the stabilizer and gelling agent be 20:(10~
23)。
4. medicament as described in claim 1, which is characterized in that when gelling agent includes calcium chloride and magnesium chloride, the chlorination
The mass ratio of calcium and magnesium chloride is 1:(0.1~0.5).
5. medicament as claimed in claim 4, which is characterized in that when gelling agent includes calcium chloride and magnesium chloride, the chlorination
The mass ratio of calcium and magnesium chloride is 1:(0.2~0.4).
6. a kind of method using Filling Principle cadmium pollution soil repair, comprising the following steps:
The described in any item stabilizers of Claims 1 to 5 and gelling agent are configured to aqueous solution respectively, obtain stabilizer aqueous solution
With gelling agent aqueous solution；
The gelling agent aqueous solution and stabilizer aqueous solution are successively alternately injected in the soil of cadmium pollution, is conserved.
7. method as claimed in claim 6, which is characterized in that the mass concentration of the stabilizer aqueous solution is 15~25%.
8. method according to claim 6 or 7, which is characterized in that the mass concentration of the gelling agent aqueous solution be 18~
24%.
9. method as claimed in claim 6, which is characterized in that when injection, it is water-soluble that the group of last time injection is divided into stabilizer
Liquid.
10. the method as described in claim 6 or 9, which is characterized in that stabilizer aqueous solution and the injection of gelling agent aqueous solution are overall
Product is the 25~50% of soil body volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910628750.6A CN110205134A (en) | 2019-07-12 | 2019-07-12 | Medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910628750.6A CN110205134A (en) | 2019-07-12 | 2019-07-12 | Medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110205134A true CN110205134A (en) | 2019-09-06 |
Family
ID=67797286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910628750.6A Pending CN110205134A (en) | 2019-07-12 | 2019-07-12 | Medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110205134A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845628A (en) * | 2015-04-22 | 2015-08-19 | 清华大学 | Calcium-based liquid curing agent and vanadium-polluted soil in-situ immobilization method |
| CN106903158A (en) * | 2017-03-03 | 2017-06-30 | 武汉大学 | A kind of Soil oxidation solidification and stabilization repairs medicament and its application method |
-
2019
- 2019-07-12 CN CN201910628750.6A patent/CN110205134A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845628A (en) * | 2015-04-22 | 2015-08-19 | 清华大学 | Calcium-based liquid curing agent and vanadium-polluted soil in-situ immobilization method |
| CN106903158A (en) * | 2017-03-03 | 2017-06-30 | 武汉大学 | A kind of Soil oxidation solidification and stabilization repairs medicament and its application method |
Non-Patent Citations (2)
| Title |
|---|
| 吴超等: "卤化物与水玻璃复合物的抑尘性能", 《中南工业大学学报》 * |
| 李江华等: "《建筑材料》", 31 July 2016, 华中科技大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Daniell | STATE-OF-THE-ART: FOR SATURATED SOILS | |
| Neupane et al. | Applicability of enzymatic calcium carbonate precipitation as a soil-strengthening technique | |
| CN106168550B (en) | The Experimental Method in Laboratory that Extra-fine sand forms artificial crust layer is solidified using microorganism | |
| CN102896143B (en) | Electric surfactant combined repair contaminated soil experimental device | |
| CN104759458B (en) | A kind of restorative procedure that pollution of chromium underground water is repaired with calcium polysulfide | |
| CN110283597A (en) | A kind of curing agent and soft subgrade soil reinforced construction method reinforced for soft subgrade soil | |
| Ou et al. | Development of a suitable operation procedure for electroosmotic chemical soil improvement | |
| Coombs et al. | The role of biofilms in subsurface transport processes | |
| Sample-Lord et al. | Diffusion through soil-bentonite backfill from a constructed vertical cutoff wall | |
| CN106734126B (en) | A kind of infiltration type reaction wall and its construction method for the processing of phreatic water polluted by nitrogen | |
| You et al. | Acceleration and centralization of a back-diffusion process: effects of EDTA-2Na on cadmium migration in high-and low-permeability systems | |
| Zhang et al. | On the dewatering of electroosmotic soil using intermittent current incorporated with calcium chloride | |
| CN110343528A (en) | The method repaired the medicament of chromium-polluted soil using Filling Principle and repair chromium-polluted soil using Filling Principle | |
| CN110205134A (en) | Medicament using Filling Principle cadmium pollution soil repair and the method using Filling Principle cadmium pollution soil repair | |
| CN110340134A (en) | A method of filling repairing polluted soil in situ | |
| CN110330976A (en) | Medicament using Filling Principle remediating lead-contaminated soil and the method using Filling Principle remediating lead-contaminated soil | |
| Gui et al. | Experimental study on bioclogging in porous media during the radioactive effluent percolation | |
| Fan et al. | Evaluating permeability and efficiency of substrates by using permeation grouting sand column test | |
| Guo et al. | Experimental analysis of bio-stimulated sealing process in environmental geotechnical engineering | |
| Ou et al. | On the behavior of the cured electroosmotic chemical treated clay | |
| Guo et al. | Experimental study on improving hydraulic characteristics of sand via microbially induced calcium carbonate precipitation | |
| Zhu et al. | Effect of water content on lime additive content in vacuum preloading with PVDs | |
| CN110387243A (en) | A kind of medicament and method for repairing water-bearing layer heavy-metal contaminated soil | |
| CN210995751U (en) | In-situ solidification device for arsenic-containing waste residue field | |
| CN220556532U (en) | Microorganism enhanced natural attenuation experimental simulation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190906 |
|
| RJ01 | Rejection of invention patent application after publication |