CN109554180A - A kind of heavy-metal contaminated soil renovation agent and restorative procedure - Google Patents
A kind of heavy-metal contaminated soil renovation agent and restorative procedure Download PDFInfo
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Abstract
The invention belongs to soil remediation fields, specifically disclose a kind of heavy-metal contaminated soil renovation agent, specifically include that 5-10 parts of loading type iron based compound, 20-50 parts of Cabase compound, 50-75 parts of silicate-based compound in parts by weight；The present invention is by preparing novel loading type iron immunomodulator compounds；The efficient absorption to harmful heavy metal is realized, further passes through the composite curing of Cabase compound and silicate-based compound, realizes and the reparation of heavy-metal contaminated soil is fixed.Meanwhile the invention also discloses a kind of restorative procedures of heavy-metal contaminated soil, soil-repairing agent additive amount is few, and treatment effeciency is high, has the characteristics that efficient, stabilization effect is permanent to heavy-metal contaminated soil, and cost is relatively low.
Description
Technical field
The invention belongs to soil remediation Treatment process fields, and in particular to a kind of heavy-metal contaminated soil renovation agent and reparation
Method.
Background technique
Heavy metal pollution of soil is that the content of trace harmful elements in the soil in soil is more than background value, excess deposition
Caused by too high levels.The heavy metal of contaminated soil mainly includes mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid
The elements such as the significant element of the bio-toxicities such as arsenic (As), and the zinc (Zn), copper (Cu), nickel (Ni) that have certain toxicity.In recent years
Come, the fast development of the industries such as nonferrous smelting, plating, chemical industry, printing and dyeing leads to copper Grown In Zinc Contaminated Soil, strong to ecological environment and human body
The threat that health is constituted is got worse.
Wherein copper zinc heavy metal hydroxide is a kind of unsteady state in copper Grown In Zinc Contaminated Soil, if not in time processing with
Disposition, under rain leaching effect, heavy metal is possible to dissolve out again and polluted underground water causes the harm of environmental ecology, the huge sum of money
Belonging to contaminated soil is generally hazardous waste.Therefore, by cupro-nickel copper zinc pollution industry soil carry out repair solidification it is very urgent.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of heavy-metal contaminated soil renovation agent, can efficiently repair
And heavy-metal contaminated soil steady in a long-term, repairing effect is good, at low cost.
Correspondingly, the present invention also provides a kind of restorative procedure of heavy-metal contaminated soil, remediation efficiency is high, using repairing
Multiple dosage is less, and rehabilitation cost is low.
In order to solve the above-mentioned technical problems, the present invention provides a kind of heavy-metal contaminated soil renovation agents, according to weight
Number meter specifically includes that 5-10 parts of loading type iron based compound, 20-50 parts of Cabase compound, silicate-based compound 50-100
Part；
The loading type iron based compound the preparation method comprises the following steps:
(1) ferron is dissolved in into solvent and obtains lysate；
(2) load base is added in the lysate；Mixed solution is obtained after mixing；
(3) sodium borohydride or the potassium borohydride that 0.1-0.5mol/L is added in the mixed solution with pre-set velocity are molten
Liquid is stirred to react 1-2h；Obtain reduzate；
(4) reduzate is cleaned, and is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 0.2-1h to the load-type iron-based chemical combination at 600-800 DEG C
Object finished product；
Wherein, the load base is one of concave convex rod, modified fibre, modified alta-mud；
The weight ratio of the load base and ferron is (90-100): (0.1-1).
As an improvement of the above technical solution, the Cabase compound in calcium oxide, calcium hydroxide, calcium carbonate one
Kind or combination.
As an improvement of the above technical solution, the silicate-based compound is selected from portland cement, bentonite, diatomite
One of or combination.
As an improvement of the above technical solution, the silicate-based compound is portland cement, the Cabase compound
For calcium oxide, the loading type iron based compound is attapulgite loaded type nano zero valence iron.
As an improvement of the above technical solution, the heavy metal be one of copper, zinc, chromium, arsenic, nickel, lead, cadmium, mercury or
Combination.
As an improvement of the above technical solution, the heavy metal is copper and zinc；In the heavy-metal contaminated soil, copper contains
Amount is 517-2970mg/kg, and the content of zinc is 803-1440mg/kg.
As an improvement of the above technical solution, step (1) includes:
(1.1) ferron is dissolved in into solvent；
(1.2) lye is added, adjusts after pH is greater than 6.5 and obtains lysate；
Wherein, the ferron is one of ferrous sulfate, frerrous chloride, ferric sulfate, iron chloride or combination；
The reagent is the mixed liquor of water and ethyl alcohol；Wherein, the volume ratio of water and ethyl alcohol is (50-70): (40-50).
As an improvement of the above technical solution, in step (2), it is passed through nitrogen after load base is added, to remove in lysate
Dissolved oxygen；
In step (3), the pre-set velocity is 1 drop/sec；
It is described that the reduzate is successively cleaned using anaerobic water, ethyl alcohol, acetone in step (4)；After the completion of cleaning, institute
Cleaning system is stated as neutrality；
The anaerobic water is to obtain after deionized water is nitrogen purged.
Correspondingly, the invention also discloses a kind of heavy-metal contaminated soil restorative procedures comprising:
One, loading type iron based compound is prepared；
Two, the soil-repairing agent is uniformly mixed with heavy-metal contaminated soil；Wherein, the soil-repairing agent and a huge sum of money
Belong to the weight ratio of contaminated soil are as follows: (5-20): (80-100)；
Three, it is sealed up for safekeeping after backfill maintenance 2-5 days after repairing solidification.
As an improvement of the above technical solution, in step 2, the soil-repairing agent addition sequence are as follows: support type is first added
Fe-base compound；Then Cabase compound and silicate-based compound is added；
In step 3, after repairing solidification, heavy metal the amount of dissolution≤1mg/L.
The present invention provides a kind of heavy-metal contaminated soil renovation agents, use loading type iron based compound, calcium base chemical combination
Object and silicate-based compound are prepared for heavy-metal contaminated soil renovation agent, and the beneficial effects of the practice of the present invention is as follows:
1. the present invention uses loading type iron based compound, Cabase compound and silicate-based compound for soil-repairing agent
Main component；Fe-base compound has extremely strong reproducibility and adsorptivity, can quickly absorb heavy metal, makes the reduction of its toxicity；
Cabase compound then may make heavy metal to precipitate in the form of hydroxide, and Cabase compound passes through the harmful huge sum of money of precipitating package
Belong to；And this heavy metal precipitation is adsorbed by Fe-base compound, the good solidification of the heavy metal of realization, significantly reduces heavy metal
Dissolution rate；The hydroxide of loading type iron based compound and heavy metal that silicate-base can then further fix absorption heavy metal sinks
It forms sediment, reduces heavy metal dissolution rate.The compound of three can effectively solidify each heavy metal species.
2. the present invention effectively improves repairing effect by reasonable soil remediation agent prescription；Soil through the invention
After renovation agent and soil remediation method are repaired, heavy metal the amount of dissolution≤1mg/L of contaminated soil meets " groundwater quality mark
It is quasi- " (GB/T 14848-2017) III class standard.
3. in soil remediation method of the present invention, soil-repairing agent additive amount is few, treatment effeciency is high, to heavy-metal contaminated soil
With efficient and long-term repair stabilization effect, cost is relatively low.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention will be made below further detailed
Description.
The invention discloses a kind of heavy-metal contaminated soil renovation agents, specifically include that support type in parts by weight
5-10 parts of Fe-base compound, 20-50 parts of Cabase compound, 50-100 parts of silicate-based compound；
Existing soil-repairing agent mostly forms hydroxide using alkaline Cabase compound and heavy metal ion, then
Solidified using silicate-based compound；However, the hydroxide of certain heavy metal elements and unstable, it is possible to dissolve into
It causes damages after entering underground water.For this purpose, the present invention improves existing soil-repairing agent.
It is soil-repairing agent present invention employs loading type iron based compound, Cabase compound and silicate-based compound
Main component；Fe-base compound has extremely strong reproducibility and adsorptivity, can quickly absorb heavy metal, makes the reduction of its toxicity；
Cabase compound is then conducive to harmful heavy metal and is precipitated in the form of hydroxide, and Cabase compound is harmful by precipitating package
Heavy metal；And this heavy metal precipitation is adsorbed by Fe-base compound, the good solidification of the heavy metal of realization, significantly reduces weight
Metal dissolving rate；Silicate-base can then further fix the loading type iron based compound of absorption heavy metal and the hydroxide of heavy metal
Object precipitating, reduces heavy metal dissolution rate.The compound of three can effectively solidify each heavy metal species；Simultaneously as soil of the present invention is repaired
Multiple agent function and effect are good, also reduce its usage amount.
Wherein, the loading type iron based compound the preparation method comprises the following steps:
(1) ferron is dissolved in into solvent and obtains lysate；
(2) load base is added in the lysate；Mixed solution is obtained after mixing；
(3) sodium borohydride or the potassium borohydride that 0.1-0.5mol/L is added in the mixed solution with pre-set velocity are molten
Liquid is stirred to react 1-2h；Obtain reduzate；
(4) reduzate is cleaned, and is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 0.2-1h to the load-type iron-based chemical combination at 600-800 DEG C
Object finished product；
Wherein, the load base is one of concave convex rod, modified fibre, modified alta-mud；Preferably concave convex rod.
Nano type Zero-valent Iron has been prepared by the method for liquid-phase precipitation in the present invention, and with concave convex rod, modified fibre,
Modified alta-mud etc. has the substance of high specific surface area as load base；It forms with high specific surface area and reproducibility
Loaded nano Zero-valent Iron；Heavy metal and heavy metal hydroxide precipitating can be effectively adsorbed, soil remediation effect is effectively promoted.
Simultaneously as reducing the usage amount of iron present invention employs the load base that concave convex rod etc. has large specific surface area, effectively drop
The low cost of soil-repairing agent.
Wherein, the weight ratio of the load base and ferron is (90-100): (0.1-1)；Preferably, base: iron examination is loaded
Agent=100:0.1-0.5, the optimization for loading the reasonable selection and preparation method of base effectively reduce the usage amount of ferron, drop
The low cost of soil-repairing agent.
Wherein, step (1) includes:
(1.1) ferron is dissolved in into solvent；
(1.2) lye is added, adjusts after pH is greater than 6.5 and obtains lysate；
Wherein, the ferron is one of ferrous sulfate, frerrous chloride, ferric sulfate, iron chloride or combination；
The reagent is the mixed liquor of water and ethyl alcohol；Wherein, the volume ratio of water and ethyl alcohol is (50-70): (40-50)；It is excellent
It is selected as (60-70): (40-50)；Ethyl alcohol, which is added, can promote the dispersion of reducing agent (sodium borohydride/potassium borohydride), promote ferron
Reduction effect.
In step (2), it is passed through nitrogen after load base is added, to remove dissolved oxygen in lysate；Removal dissolved oxygen can mention
Rise the reduction for ferron；Promote the reproducibility of loading type iron based compound；
In step (3), the pre-set velocity is 1 drop/sec, instills reducing agent (sodium borohydride/hydroboration with slower speed
Potassium) its reduction effect can be given full play to；Meanwhile it being also beneficial to generate the Zero-valent Iron of Nano grade.
In step (4), the reduzate is successively cleaned using anaerobic water, ethyl alcohol, acetone；It is described clear after the completion of cleaning
System is washed as neutrality, i.e., pH is between 6.5-8；Preferably, cleaning step are as follows: cleaned 1 time using anaerobic water, then used
The ethyl alcohol of amount cleans 1 time, is then cleaned at least 3 times using acetone；So that the pH of cleaning system is stopping cleaning after neutrality.Using
Organic reagent ethyl alcohol and acetone, which are cleaned multiple times, can effectively remove residual reducing agent, the solvent etc. being attached in porous matrix, be promoted
The purity of loading type iron based compound.Wherein, the anaerobic water is to obtain after deionized water is nitrogen purged.
It after the completion of cleaning, is dried under vacuum conditions, drying advantageously ensures that load-type iron-basedization under vacuum condition
Close the reproducibility of object.
In step (5), by reduzate, calcination 0.2-1h, preferred calcination temperature are 650-720 at 600-800 DEG C
DEG C, further preferably 700 DEG C；Calcination time is 0.2-1h, preferably 0.2-0.6h, further preferably 0.5h.Preferably,
Calcination is carried out in a nitrogen atmosphere.The effect of calcination is the moisture removed in attapulgite, increases specific surface area, finally enhances it
The adsorption capacity in duct.
In order to further enhance the effect of soil-repairing agent in the present invention, need to select substances various in the present invention
It selects；
Preferably, in soil remediation agent prescription of the invention, the Cabase compound be selected from calcium oxide, calcium hydroxide,
One of calcium carbonate or combination；These Cabase compounds all have alkalescent, can effectively play a role, while being easy to obtain
It takes；It is further preferred that the Cabase compound selects calcium oxide, cost is relatively low.The addition weight of the Cabase compound
Part is 20-50 parts；Preferably 20-40 parts, further preferably 25-40 parts.
Preferably, in the formula of soil-repairing agent of the invention, the silicate-based compound be selected from portland cement,
One of bentonite, diatomite or combination；It is further preferred that the silicate-based compound selects acid salt cement, it is described
Portland cement is 42.5R type ordinary cement；Ordinary cement has good solidification effect, and its partial size is smaller, absorption solidification
Effect is strong.The addition parts by weight of silicate-based compound are 50-100 parts, preferably 50-90 parts, further preferably 50-75
Part, further preferably 60-75 parts.
Preferably, the formula of the soil-repairing agent in the present invention are as follows: 5-9 parts of attapulgite loaded type nano zero valence iron, oxidation
20-50 parts of calcium, 50-100 parts of cement.
Soil-repairing agent in the present invention is applicable to the reparation of all kinds of heavy-metal contaminated soils；As copper, zinc, chromium, arsenic,
The heavy-metal contaminated soils such as nickel, lead, cadmium, mercury, it is preferred that the soil-repairing agent in the present invention is particularly suitable for copper zinc pollution soil
Earth；The content of copper is 517-2970mg/kg in soil to be repaired, and the content of zinc is 803-1440mg/kg.
Correspondingly, the invention also discloses a kind of restorative procedures of heavy-metal contaminated soil comprising:
One, loading type iron based compound is prepared；
Two, the soil-repairing agent is uniformly mixed with heavy-metal contaminated soil；Wherein, the soil-repairing agent and a huge sum of money
The weight ratio for belonging to contaminated soil is (5-20): (80-100)；
Preferably, the renovation agent addition sequence are as follows: loading type iron based compound is first added；Then Cabase compound is added
And silicate-based compound；
Soil-repairing agent function and effect in the present invention are good, and additional amount is relatively low.
Three, it is sealed up for safekeeping after backfill maintenance 2-5 days after repairing solidification.
Preferably, after repairing solidification, heavy metal the amount of dissolution≤1mg/L.
With specific embodiment, the present invention is further explained below:
Embodiment 1
Formula
5 parts of loading type iron based compound, 20 parts of Cabase compound, 50 parts of silicate-based compound；
Wherein, loading type iron based compound is modified fibre loaded nano Zero-valent Iron, and Cabase compound is calcium carbonate, silicon
Hydrochlorate based compound is diatomite；
Loading type iron based compound the preparation method comprises the following steps:
(1) ferron is dissolved in into solvent and obtains lysate；
(2) load base is added in the lysate；Mixed solution is obtained after mixing；
(3) sodium borohydride solution of 0.1mol/L is added in the mixed solution with pre-set velocity, is stirred to react 1h；?
To reduzate；
(4) reduzate is cleaned, and is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 0.2h to the loading type iron based compound finished product at 600 DEG C；
Wherein, the load base is modified fibre, and the ferron that contains is ferric sulfate, and the solvent is water；
The weight ratio of the load base and ferron is 100:0.1.
Restorative procedure
One, loading type iron based compound is prepared；
Two, the soil-repairing agent is uniformly mixed with heavy-metal contaminated soil；
Wherein, the heavy-metal contaminated soil is copper Grown In Zinc Contaminated Soil, before processing, copper content 1037mg/kg, and Zn content
803mg/kg；
Wherein, the weight ratio of the soil-repairing agent and heavy-metal contaminated soil is 5:100；
Three, it is sealed up for safekeeping after backfill maintenance 2 days after repairing solidification.
Embodiment 2
Formula
10 parts of loading type iron based compound, 50 parts of Cabase compound, 100 parts of silicate-based compound；
Wherein, loading type iron based compound is modified alta-mud loaded type nano zero valence iron, and Cabase compound is hydroxide
Calcium, silicate-based compound are diatomite；
Loading type iron based compound the preparation method comprises the following steps:
(1) ferron is dissolved in into solvent and obtains lysate；
(2) load base is added in the lysate；Mixed solution is obtained after mixing；
(3) solution of potassium borohydride of 0.5mol/L is added in the mixed solution with pre-set velocity, is stirred to react 2h；?
To reduzate；
(4) reduzate is cleaned, and is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 1h to the loading type iron based compound finished product at 800 DEG C；
Wherein, the load base is modified fibre, and the ferron that contains is ferric sulfate, and the solvent is that water is mixed with alcohol
Solution；
The weight ratio of the load base and ferron is 90:1.
Restorative procedure
One, loading type iron based compound is prepared；
Two, the soil-repairing agent is uniformly mixed with heavy-metal contaminated soil；
Wherein, the heavy-metal contaminated soil is copper Grown In Zinc Contaminated Soil, before processing, copper content 1037mg/kg, and Zn content
803mg/kg；
Wherein, the weight ratio of the soil-repairing agent and heavy-metal contaminated soil is 20:80；
Three, it is sealed up for safekeeping after backfill maintenance 5 days after repairing solidification.
Embodiment 3
Formula
5 parts of loading type iron based compound, 20 parts of Cabase compound, 75 parts of silicate-based compound；
Wherein, loading type iron based compound is attapulgite loaded type nano zero valence iron, and Cabase compound is calcium oxide, silicic acid
Salt based compound is cement；
Loading type iron based compound the preparation method comprises the following steps:
(1) ferrous sulfate is dissolved in into water and alcohol mixed solution (water and alcohol by volume ratio is 50；50) lysate is obtained；
(2) concave convex rod is added in the lysate；Mixed solution is obtained after mixing；
(3) sodium borohydride solution of 0.3mol/L is added in the mixed solution with 1 drop/sec of speed, is stirred to react
1.2h；Obtain reduzate；
(4) reduzate, after the completion of cleaning, cleaning agent system are once cleaned using anaerobic water, excess ethyl alcohol, acetone
PH is 7；And it is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 0.5h to the loading type iron based compound finished product at 700 DEG C；
The weight ratio of the load base and ferron is 100:0.5.
Restorative procedure
One, loading type iron based compound is prepared；
Two, the soil-repairing agent is uniformly mixed with heavy-metal contaminated soil；
Wherein, the heavy-metal contaminated soil is copper Grown In Zinc Contaminated Soil, before processing, copper content 2970mg/kg, and Zn content
1440mg/kg；
Wherein, the weight ratio of the soil-repairing agent and heavy-metal contaminated soil is 10:90；
Three, it is sealed up for safekeeping after backfill maintenance 3 days after repairing solidification.
Embodiment 4
Formula
8 parts of loading type iron based compound, 20 parts of Cabase compound, 70 parts of silicate-based compound；
Wherein, the preparation method of loading type iron based compound and restorative procedure are same as Example 3.
Embodiment 5
Soil remediation agent prescription is same as Example 4；
Soil remediation method is same as Example 4；
Loading type iron based compound the preparation method comprises the following steps:
Loading type iron based compound the preparation method comprises the following steps:
(1) ferrous sulfate is dissolved in into water and alcohol mixed solution (water and alcohol by volume ratio is 60；40) lysate is obtained；
(2) concave convex rod is added in the lysate；Mixed solution is obtained after mixing；
(3) sodium borohydride solution of 0.45mol/L is added in the mixed solution with 1 drop/sec of speed, is stirred to react
1.2h；Obtain reduzate；
(4) reduzate, after the completion of cleaning, cleaning agent system are once cleaned using anaerobic water, excess ethyl alcohol, acetone
PH is 7.5；And it is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 1h to the loading type iron based compound finished product at 750 DEG C；
The weight ratio of the load base and ferron is 100:0.5.
Comparative example 1
Repair agent prescription
20 parts of flyash, 20 parts of calcium oxide, 70 parts of cement；
Restorative procedure is in the same manner as in Example 5.
Soil after acquisition maintenance is completed is detected, and testing result is as follows:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 | |
| Copper content (mg/kg) | 0.685 | 0.425 | 0.624 | 0.597 | 0.389 | 1.55 |
| Zn content (mg/kg) | 0.785 | 0.582 | 0.715 | 0.768 | 0.476 | 2.32 |
Soil it can be seen from table after the restorative procedure processing in the present invention, heavy metal dissolution rate is low, symbol
Close " groundwater quality standard " (GB/T 14848-2017) III class standard.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (10)
1. a kind of heavy-metal contaminated soil renovation agent, which is characterized in that specifically include that load-type iron-basedization in parts by weight
Close object 5-10 parts, 20-50 parts of Cabase compound, 50-75 parts of silicate-based compound；
The loading type iron based compound the preparation method comprises the following steps:
(1) ferron is dissolved in into solvent and obtains lysate；
(2) load base is added in the lysate；Mixed solution is obtained after mixing；
(3) sodium borohydride or solution of potassium borohydride of 0.1-0.5mol/L is added in the mixed solution with pre-set velocity, stirs
Mix reaction 1-2h；Obtain reduzate；
(4) reduzate is cleaned, and is dried under vacuum conditions；
(5) reduzate after drying is obtained after calcination 0.2-1h at 600-800 DEG C the loading type iron based compound at
Product；
Wherein, the load base is one of concave convex rod, modified fibre, modified alta-mud；
The weight ratio of the load base and ferron is (90-100): (0.1-1).
2. heavy-metal contaminated soil renovation agent as described in claim 1, which is characterized in that the Cabase compound is selected from oxidation
One of calcium, calcium hydroxide, calcium carbonate or combination.
3. heavy-metal contaminated soil renovation agent as described in claim 1, which is characterized in that the silicate-based compound is selected from
One of portland cement, bentonite, diatomite or combination.
4. heavy-metal contaminated soil renovation agent as described in any one of claims 1-3, which is characterized in that described silicate-based
Conjunction object is portland cement, and the Cabase compound is calcium oxide, and the loading type iron based compound is that attapulgite loaded type is received
Rice Zero-valent Iron.
5. heavy-metal contaminated soil renovation agent as described in claim 1, which is characterized in that the heavy metal be copper, zinc, chromium,
One of arsenic, nickel, lead, cadmium, mercury or combination.
6. heavy-metal contaminated soil renovation agent as claimed in claim 4, which is characterized in that the heavy metal is copper and zinc；Institute
It states in heavy-metal contaminated soil, the content of copper is 517-2970mg/kg, and the content of zinc is 803-1440mg/kg.
7. heavy-metal contaminated soil renovation agent as described in claim 1, which is characterized in that step (1) includes:
(1.1) ferron is dissolved in into solvent；
(1.2) lye is added, adjusts pH and is greater than 6.5, obtain lysate；
Wherein, the ferron is one of ferrous sulfate, frerrous chloride, ferric sulfate, iron chloride or combination；
The reagent is the mixed liquor of water and ethyl alcohol；Wherein, the volume ratio of water and ethyl alcohol is (50-70): (40-50).
8. heavy-metal contaminated soil renovation agent as described in claim 1, which is characterized in that
In step (2), it is passed through nitrogen after load base is added, to remove dissolved oxygen in lysate；
In step (3), the pre-set velocity is 1 drop/sec；
It is described that the reduzate is successively cleaned using anaerobic water, ethyl alcohol, acetone in step (4)；It is described clear after the completion of cleaning
System is washed as neutrality；
The anaerobic water is to obtain after deionized water is nitrogen purged.
9. a kind of heavy-metal contaminated soil restorative procedure characterized by comprising
One, loading type iron based compound is prepared；
Two, the soil-repairing agent is uniformly mixed with heavy-metal contaminated soil；Wherein, the soil-repairing agent with it is heavy metal-polluted
The weight ratio for contaminating soil is (5-20): (80-100)；
Three, backfill conserves 2-5 days after repairing solidification, seals up for safekeeping.
10. heavy-metal contaminated soil restorative procedure as claimed in claim 9, which is characterized in that in step 2, the renovation agent
Addition sequence are as follows: loading type iron based compound is first added；Then Cabase compound and silicate-based compound is added；
In step 3, after repairing solidification, heavy metal the amount of dissolution≤1mg/L.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110079325A (en) * | 2019-04-12 | 2019-08-02 | 中节能大地环境修复有限公司 | It is a kind of for arsenic, the composite drug and restorative procedure of nickel combined contamination soil |
| CN110079323A (en) * | 2019-04-30 | 2019-08-02 | 湖南省和清环境科技有限公司 | A kind of arsenic, nickel combined pollution place soil remediation stabilizer and its processing method |
| CN110343528A (en) * | 2019-07-12 | 2019-10-18 | 河南省明创环境科技有限公司 | The method repaired the medicament of chromium-polluted soil using Filling Principle and repair chromium-polluted soil using Filling Principle |
| CN111019664A (en) * | 2019-12-26 | 2020-04-17 | 甘肃瀚兴环保科技有限公司 | Method for preparing soil heavy metal passivation material by using palygorskite loaded with nano zero-valent iron |
| CN111019663A (en) * | 2019-12-24 | 2020-04-17 | 甘肃瀚兴环保科技有限公司 | Heavy metal passivation material of nano zero-valent iron composite attapulgite, preparation method and application thereof |
| CN111617768A (en) * | 2020-05-29 | 2020-09-04 | 上海华阜科技发展有限公司 | Solid waste catalyst and preparation method thereof |
| CN111676023A (en) * | 2020-05-27 | 2020-09-18 | 永清环保股份有限公司 | Semi-wrapping stabilizing material and preparation method and use method thereof |
| CN111718719A (en) * | 2020-06-23 | 2020-09-29 | 中南大学 | Vulcanized nano zero-valent iron-acid activated montmorillonite composite material and preparation method and application thereof |
| CN112845563A (en) * | 2020-12-18 | 2021-05-28 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Modified fly ash and preparation method and application thereof |
| WO2022199351A1 (en) * | 2021-03-26 | 2022-09-29 | 中国环境科学研究院 | Process for producing heavy-metal-mediated biochar complex cured by using silicate |
| CN115636462A (en) * | 2022-10-21 | 2023-01-24 | 成都理工大学 | Method for synthesizing composite material with reduction and adsorption effects on mercury |
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| CN110079325A (en) * | 2019-04-12 | 2019-08-02 | 中节能大地环境修复有限公司 | It is a kind of for arsenic, the composite drug and restorative procedure of nickel combined contamination soil |
| CN110079323A (en) * | 2019-04-30 | 2019-08-02 | 湖南省和清环境科技有限公司 | A kind of arsenic, nickel combined pollution place soil remediation stabilizer and its processing method |
| CN110343528A (en) * | 2019-07-12 | 2019-10-18 | 河南省明创环境科技有限公司 | The method repaired the medicament of chromium-polluted soil using Filling Principle and repair chromium-polluted soil using Filling Principle |
| CN111019663A (en) * | 2019-12-24 | 2020-04-17 | 甘肃瀚兴环保科技有限公司 | Heavy metal passivation material of nano zero-valent iron composite attapulgite, preparation method and application thereof |
| CN111019664A (en) * | 2019-12-26 | 2020-04-17 | 甘肃瀚兴环保科技有限公司 | Method for preparing soil heavy metal passivation material by using palygorskite loaded with nano zero-valent iron |
| CN111676023A (en) * | 2020-05-27 | 2020-09-18 | 永清环保股份有限公司 | Semi-wrapping stabilizing material and preparation method and use method thereof |
| CN111617768A (en) * | 2020-05-29 | 2020-09-04 | 上海华阜科技发展有限公司 | Solid waste catalyst and preparation method thereof |
| CN111718719A (en) * | 2020-06-23 | 2020-09-29 | 中南大学 | Vulcanized nano zero-valent iron-acid activated montmorillonite composite material and preparation method and application thereof |
| CN112845563A (en) * | 2020-12-18 | 2021-05-28 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Modified fly ash and preparation method and application thereof |
| WO2022199351A1 (en) * | 2021-03-26 | 2022-09-29 | 中国环境科学研究院 | Process for producing heavy-metal-mediated biochar complex cured by using silicate |
| CN115636462A (en) * | 2022-10-21 | 2023-01-24 | 成都理工大学 | Method for synthesizing composite material with reduction and adsorption effects on mercury |
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