CN106244163A - The reparation medicament of Compound Heavy Metals soil and methods for making and using same thereof - Google Patents
The reparation medicament of Compound Heavy Metals soil and methods for making and using same thereof Download PDFInfo
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- CN106244163A CN106244163A CN201610631613.4A CN201610631613A CN106244163A CN 106244163 A CN106244163 A CN 106244163A CN 201610631613 A CN201610631613 A CN 201610631613A CN 106244163 A CN106244163 A CN 106244163A
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- 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
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- 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
- C09K2101/00—Agricultural use
Abstract
The invention discloses the reparation medicament of a kind of Compound Heavy Metals soil, comprise following composition: phosphate compound；Soluble ferric iron salt；Magnesium oxide；Inorganic clay；Organic sequestering agent；Silicon dioxide；Wherein, phosphate compound is one of them or a combination thereof of phosphate, hydrophosphate or dihydric phosphate.The present invention is applicable to Compound Heavy Metals agricultural land soil, Compound Heavy Metals industrial sites soil and place, Compound Heavy Metals mine soil.Repair the stirring of medicament and heavy-metal contaminated soil to be mixed into stirring in situ and mix or dystopy stirs and mixes.Repairing efficiency is short, low cost, broad spectrum activity, and technological operation is simple.
Description
Technical field
The invention belongs to heavy metal pollution of soil and administer reparation field, specifically, the present invention relates to a kind of for administering
The reparation medicament of Compound Heavy Metals soil and preparation thereof and application.Specifically, relate to a kind of heavy metal cadmium, chromium, arsenic,
The one of which of lead, copper, zinc or nickel or the preparation repairing medicament of a combination thereof contaminated soil and using method thereof.
Background technology
In April, 2014, Environmental Protection Department and Ministry of Land and Resources combine " whole nation Soil Pollution Investigation publication " of issue
Survey result shows: whole nation soil environment situation totally allows of no optimist, actual survey area about 6,300,000 square kilometres, whole nation soil
The total some position exceeding standard rate of earth is 16.1%, the most slightly, slightly, moderate and serious pollution point position ratio be respectively 11.2%, 2.3%,
1.5% and 1.1%.Pollute based on inorganic type, cadmium, hydrargyrum, arsenic, copper, lead, zinc, nickel 8 heavy metal species point position exceeding standard rate be respectively 7%,
1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9% and 4.8%.An inorganic pollution figure place that exceeds standard accounts for whole super punctuation bits
82.8%.10000000 mu of contaminated arable lands need improvement reparation, 40,000,000 mu of contaminated risks to plough and need risk management and control.With much money
Belong to grain and the food safety polluting arable land serious threat China." cadmium rice ", " blood lead exceeds standard " and " cancer village and cancer ground
Figure " etc. the exposure of event especially heavy-metal contaminated soil is pushed to public attention top of the waves, cause governments at all levels and each rank throughout the country
The highest attention of layer.
On May 31st, 2016, " Soil Pollution Control action plan " is issued, and is mentioned to the year two thousand twenty contaminated achilles tendon tear profit
Reach about 90% by rate, pollute plot safe utilization rate and reach 90%；95% is reached to the year two thousand thirty contaminated achilles tendon tear utilization rate
Above, pollute plot safe utilization rate and reach more than 95%.
At present, the repairing and treating technology for heavy-metal contaminated soil mainly includes physics, biological and chemical recovery technique.
The peripheral doses technology of heavy-metal contaminated soil is mainly elution technique and electrokinetics.
Elution technique carries out drip washing, finally to leacheate mainly by water, acid solution or alkali liquor heavy metal contaminated soil
In heavy metal carry out recycle resource recycling.Elution technique is applicable to infiltration coefficient more than 10-3Cm/s, soil clay particle
The content soil less than 25%.This technical equipment is expensive, and cost is the highest, and current Engineering Projects is little.
Electromotion repairing technique is to drive enriching pollutants to electrode district by electrochemistry and electrodynamic compound action, enters
The process that row is concentrated or separated.This technology is applicable to the various heavy contaminated soil of the clayey of little scope, at home the most only
Being to operate at laboratory, Practical Project case is little.
The biological restoration of heavy-metal contaminated soil mainly super enriching plant heavy metal is enriched with, and has than more typical
Herba pteridis vittatae and southeast scape, realize the rich absorbent to arsenic and cadmium respectively.
Herba pteridis vittatae is 200000 times that other plant absorbs As ability.Need every year super enriching plant is cradled, burn into
Row processes, and flying ash carries out landfill disposal after pretreatment.The biotechnology time cycle is the longest, and every kind of plant counterweight gold
Accessory has proprietary selectivity.Phytoremediation is it is generally required to the 3-5 year, and during reparation, normal rural activity stops.It addition, it is right
Burning the tail gas disposal technique produced and require higher, be easily generated secondary pollution, the most only carrying out in a part of demonstration project should
With.
The chemical remediation technology of heavy-metal contaminated soil mainly includes solidification and stabilization technology.
Wherein curing technology realizes fixing the pollutant containing arsenic mainly by cement, Colophonium or vitrification.Drip
Blue or green curing technology mainly uses emulsified asphalt to wrap up pollutant；Vitrification solidifying mainly by glass particle with dirt
Dye material is heated to molten condition together and realizes the encapsulating to pollutant.Bitumen solidification and glass solidification technology to construction equipment,
Whole technological process, operation etc. have the highest requirement, and cost is the highest.Curing technology increase-volume is bigger, causes the later stage
Landfill added cost.
Stabilization technology is to add to repair medicament in heavy-metal contaminated soil, and pollutant are anti-with medicament generation complicated chemical
Indissoluble material should be formed.The increase-volume ratio of stabilization technology is low, requires simple to equipment and operation, and low cost and cycle are short.Stable
Change technology does not has elimination heavy metal from source, and long-time stability are also required to urgently study clearly.
The patent of Application No. 201110125022.7 discloses a kind of composite heavy metal polluted soil in-situ fixing
Method, medicament prepared by this invention passes through in-situ treatment, repairs cadmium, chromium, hydrargyrum or the soil of lead contamination through the curing period of 1 month
Earth.This invention curing time is long, can only in-situ treatment, and the heavy metal limitednumber administered.
In sum, for China's Heavy Metal Pollution and the overall background of relevant policies, repaiied by analysing and comparing
Recovering technology feature, develops applicable China's national situation, has that repairing efficiency is short, low cost, effective, technological operation simple, wide spectrum
Property, increase-volume amount is little, medicament is easy to get, the most imperative to the recovery technique that equipment and technical staff's threshold are low.
Summary of the invention
It is contemplated that overcome the defect of prior art, optimize critical technical parameter further, it is provided that a kind of repairing efficiency
Short, expense is low, technological operation is simple, does not affect the steady for repairing the chemistry of Compound Heavy Metals soil of original production activity
Surely method is changed.Made by lattice encapsulating effect, (being total to) precipitation, absorption/adsorption, complexation/chelation, ion exchange
With and become the effect such as ore deposit, heavy metal ion is converted into phosphate mineral, hydroxide, complex/chelate and carbonic acid
Salt mineral etc. are insoluble in the material of water and are fixed in soil.
The reparation medicament of Compound Heavy Metals soil that the present invention provides, comprises following composition:
Phosphate compound；
Soluble ferric iron salt；
Magnesium oxide；
Inorganic clay；
Organic sequestering agent；
Silicon dioxide；
Wherein, phosphate compound is one of them or a combination thereof of phosphate, hydrophosphate or dihydric phosphate.
Preferably, the reparation medicament of above-mentioned Compound Heavy Metals soil, the composition comprised and the weight of each composition
Number is as follows:
Phosphate compound 2 ~ 30；
Soluble ferric iron salt 2 ~ 30；
Magnesium oxide 2 ~ 30；
Inorganic clay 1 ~ 10；
Organic sequestering agent 1 ~ 10；
Silica 1 ~ 15.
Preferably, described phosphate compound is calcium phosphate, calcium superphosphate, calcium magnesium phosphate, calcium hydrogen phosphate, biphosphate
One or more combination in any in calcium；Described soluble ferric iron salt be iron sulfate, ferrous sulfate, the one of iron chloride or
Two or more combination in any；Described inorganic clay is bentonite, Kaolin, meerschaum, attapulgite, the one of zeolite or two
Plant above combination in any；Organic sequestering agent is humic acids and one or both combination of biological black wood charcoal；Described silicon dioxide
Selected from ground quartz sand, SiO 2 powder, one or more combination in any of glass powder.
Preferably, described magnesium oxide is light calcined magnesia.
It is further preferred that the specific surface area of described light calcined magnesia is 5～20m2/g.
Preferably, the preparation method of described light calcined magnesia is as follows: take magnesite, shepardite, periclase and dolomite
One of which or a combination thereof, calcine at 800-1000 DEG C, to obtain final product.
Preferably, the content of organic matter of described humic acid is maintained at more than 30%；The preparation method of described biological black wood charcoal is such as
Under: taking the one in bamboo, rice husk, Pericarppium arachidis hypogaeae or wheat stalk, at 500-800 DEG C, thermal cracking half an hour, to obtain final product.
The present invention also provides for the preparation method repairing medicament of above-mentioned Compound Heavy Metals soil, including walking as follows
Rapid: to take each composition and mix and get final product.
The present invention also provides for applying the reparation medicament restoration of soil polluted by heavy metal of above-mentioned Compound Heavy Metals soil
Method, it is characterised in that comprise the steps:
(1) described heavy-metal contaminated soil reparation medicament is uniformly mixed with heavy-metal contaminated soil:；
(2) maintenance: through the outdoor maintenance of 24-48 hour.
Preferably, step (1) is: described heavy-metal contaminated soil is repaired medicament with heavy-metal contaminated soil according to quality
It is uniformly mixed than 2%-30%, adds water and make the moisture content of mixture be maintained at 20%-50%.
In the present invention, described heavy metal refers to one of them or a combination thereof of cadmium, chromium, arsenic, lead, copper, zinc or nickel.
The present invention is applicable to Compound Heavy Metals agricultural land soil, Compound Heavy Metals industrial sites soil and compound weight
Place, metallic pollution mine soil.Reparation medicament is mixed into stirring in situ and mixes or dystopy stirring with heavy-metal contaminated soil stirring
Mixing.Repairing efficiency is short, low cost, broad spectrum activity, and technological operation is simple.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, so that those skilled in the art can be more preferable
Understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
The heavy-metal contaminated soil that the present invention provides repairs medicament, comprises following composition:
Phosphate compound；
Soluble ferric iron salt；
Magnesium oxide；
Inorganic clay；
Organic sequestering agent；
Silicon dioxide；
Wherein, phosphate compound is one of them or a combination thereof of phosphate, hydrophosphate or dihydric phosphate.
Wherein, the heavy metal ion in contaminated soil is converted into phosphate mineral by phosphate compound.Magnesium oxide is inhaled
Receive the carbon dioxide in air and generate the magnesium carbonate nuclei of crystallization, and become needle-like or column crystallization body in the superficial growth of silicon dioxide,
Soluble ferric iron salt and arsenic generate precipitated ferric arsenate, and organic sequestering agent forms heavy metal complex with heavy metal, with magnesium oxide, soil
In moisture, carbonic acid particle react, formed crystal structure, by heavy metal complex sealing, increment adsorbent can be to pollution
Thing carries out strengthening absorption and ion exchanges.By lattice encapsulating effect, (being total to) precipitation, absorption/adsorption, complexation/chela
The effects such as cooperation use, ion exchange and one-tenth ore deposit, are converted into phosphate mineral, hydroxide, complexation by heavy metal ion
Thing/chelate and carbonate mineral etc. is insoluble in the material of water and is fixed in soil.
Preferably, above-mentioned heavy-metal contaminated soil repairs medicament, and the parts by weight of the composition comprised and each composition are such as
Under:
Phosphate compound 2 ~ 30；
Soluble ferric iron salt 2 ~ 30；
Magnesium oxide 2 ~ 30；
Inorganic clay 1 ~ 10；
Organic sequestering agent 1 ~ 10；
Silica 1 ~ 15.
Experiment proves that, within the above range, the repairing effect of heavy metal contaminated soil is preferable.
The described medicament of the present invention is analytical pure, Chemical Reagent Co., Ltd., Sinopharm Group provide.Institute in embodiment
State test sample from heavy metal pollution farmland, Hunan and certain mining area tailings Han heavy metal.Sample air-dries, grinds, crosses 2mm sieve
The most standby.
Light calcined magnesia preparation method used in embodiment 1 ~ 6 is as follows: take magnesite, shepardite, periclase and white clouds
The one of which of stone or a combination thereof, calcine at 800-1000 DEG C and prepare for about 24 hours.
The specific surface area of light calcined magnesia is 5～20m2/g 。
The advantage of light calcined magnesia is: quality is loose, hole is high, specific surface area is big, reactivity is high between crystal.
Embodiment 1
For examination heavy-metal contaminated soil concentration be: Cr(66.28mg/kg) Ni(57.84mg/kg), Cu(450.90mg/kg),
Zn(5431.00mg/kg), As(6080.00mg/kg), Cd(37.02mg/kg) and Pb(2936.86mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Calcium phosphate | 20 | 2 |
| Iron sulfate | 25 | 2.5 |
| Light calcined magnesia | 100 | 10 |
| Bentonite | 10 | 1 |
| Humic acids | 25 | 2.5 |
| Ground silica | 25 | 2.5 |
After the reparation medicament prepared and 1kg heavy-metal contaminated soil are uniformly mixed, add water to moisture content to 30%, outdoor
Maintenance 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 2
For examination contaminated soil concentration be: Cr(66.28mg/kg) Ni(57.84mg/kg), Cu(450.90mg/kg), Zn
(5431.00mg/kg), As(6080.00mg/kg), Cd(37.02mg/kg) and Pb(2936.86mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Dalcium biphosphate | 20 | 2 |
| Ferrous sulfate | 75 | 7.5 |
| Magnesium oxide | 100 | 10 |
| Kaolin | 5 | 0.5 |
| Humic acids | 25 | 2.5 |
| Ground quartz sand | 25 | 2.5 |
After the reparation medicament prepared and 1kg combined contamination soil are uniformly mixed, add water to moisture content to 40%, outdoor support
Protect 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 3
For examination tailings concentration be: Cr(43.03mg/kg) Ni(28.67mg/kg), Cu(301.25mg/kg), Zn
(3412.00mg/kg), As(2951.00mg/kg), Cd(21.91mg/kg) and Pb(1825.71mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Calcium phosphate | 20 | 2 |
| Iron sulfate | 25 | 2.5 |
| Magnesium oxide | 100 | 10 |
| Meerschaum | 10 | 1 |
| Humic acids | 25 | 2.5 |
| Glass powder | 25 | 2.5 |
After the reparation medicament prepared and 1kg tailings Han heavy metal are uniformly mixed, add water to moisture content to 40%, outdoor foster
Protect 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 4
For examination tailings concentration be: Cr(43.03mg/kg) Ni(28.67mg/kg), Cu(301.25mg/kg), Zn
(3412.00mg/kg), As(2951.00mg/kg), Cd(21.91mg/kg) and Pb(1825.71mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Calcium superphosphate | 20 | 2 |
| Ferrous sulfate | 75 | 7.5 |
| Magnesium oxide | 75 | 7.5 |
| Zeolite | 10 | 1 |
| Humic acids | 75 | 7.5 |
| Ground quartz sand | 10 | 1 |
After the reparation medicament prepared and 1kg tailings Han heavy metal are uniformly mixed, add water to moisture content to 50%, outdoor foster
Protect 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 5
For examination contaminated soil concentration be: Cr(66.28mg/kg) Ni(57.84mg/kg), Cu(450.90mg/kg), Zn
(5431.00mg/kg), As(6080.00mg/kg), Cd(37.02mg/kg) and Pb(2936.86mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Calcium phosphate | 60 | 6 |
| Ferrous sulfate | 60 | 6 |
| Magnesium oxide | 60 | 6 |
| Kaolin | 20 | 2 |
| Humic acids | 20 | 2 |
| Ground silica | 30 | 3 |
After the reparation medicament prepared and 1kg combined contamination soil are uniformly mixed, add water to moisture content to 30%, outdoor support
Protect 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 6
For examination tailings concentration be: Cr(43.03mg/kg) Ni(28.67mg/kg), Cu(301.25mg/kg), Zn
(3412.00mg/kg), As(2951.00mg/kg), Cd(21.91mg/kg) and Pb(1825.71mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Calcium superphosphate | 10 | 1 |
| Iron sulfate | 20 | 2 |
| Magnesium oxide | 20 | 2 |
| Kaolin | 10 | 1 |
| Biological black wood charcoal | 10 | 1 |
| Ground quartz sand | 10 | 1 |
After the reparation medicament prepared and 1kg tailings Han heavy metal are uniformly mixed, add water to moisture content to 40%, outdoor foster
Protect 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 7
For examination contaminated soil concentration be: Cr(66.28mg/kg) Ni(57.84mg/kg), Cu(450.90mg/kg), Zn
(5431.00mg/kg), As(6080.00mg/kg), Cd(37.02mg/kg) and Pb(2936.86mg/kg).
The reparation medicament of Compound Heavy Metals soil is prepared according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Dalcium biphosphate | 20 | 2 |
| Ferrous sulfate | 75 | 7.5 |
| Commercially available common magnesium oxide | 100 | 10 |
| Kaolin | 5 | 0.5 |
| Humic acids | 25 | 2.5 |
| Ground quartz sand | 25 | 2.5 |
After the reparation medicament prepared and 1kg combined contamination soil are uniformly mixed, add water to moisture content to 40%, outdoor support
Protect 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment 8
Comparative example
For examination heavy-metal contaminated soil concentration be: Cr(66.28mg/kg) Ni(57.84mg/kg), Cu(450.90mg/kg),
Zn(5431.00mg/kg), As(6080.00mg/kg), Cd(37.02mg/kg) and Pb(2936.86mg/kg).
Repair medicament to prepare according to following ratio:
| Composition | Quality (g) | Mass percent/% shared in heavy-metal contaminated soil |
| Dicalcium phosphate | 50 | 5 |
| Ferrous sulfate | 50 | 5 |
| Calcium oxide | 50 | 5 |
| Bentonite | 10 | 1 |
After the reparation medicament prepared and 1kg heavy-metal contaminated soil are uniformly mixed, add water to moisture content to 40%, outdoor
Maintenance 48 days.
According to " solid waste Leaching leaching method sulfonitric method " (HJT299-2007), stabilisation body is carried out
Leaching experiment.The detection of the concentration of leachate sample heavy metal uses Thermo ICP-MS to analyze, and concrete detection method is with reference to beautiful
State's EPA 6020A-2007 detection method.
Test result is as shown in the table.
Embodiment described above is only the preferred embodiment lifted by absolutely proving the present invention, the protection model of the present invention
Enclose and be not limited to this.The equivalent that those skilled in the art are made on the basis of the present invention substitutes or conversion, all in the present invention
Protection domain within.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. the reparation medicament of a Compound Heavy Metals soil, it is characterised in that comprise following composition:
Phosphate compound；
Soluble ferric iron salt；
Magnesium oxide；
Inorganic clay；
Organic sequestering agent；
Silicon dioxide；
Wherein, phosphate compound is one of them or a combination thereof of phosphate, hydrophosphate or dihydric phosphate.
The reparation medicament of Compound Heavy Metals soil the most according to claim 1, it is characterised in that the composition comprised with
And the parts by weight of each composition are as follows:
Phosphate compound 2 ~ 30；
Soluble ferric iron salt 2 ~ 30；
Magnesium oxide 2 ~ 30；
Inorganic clay 1 ~ 10；
Organic sequestering agent 1 ~ 10；
Silica 1 ~ 15.
The reparation medicament of Compound Heavy Metals soil the most according to claim 1 and 2, it is characterised in that described phosphoric acid
Salt compounds is one or more in calcium phosphate, calcium superphosphate, calcium magnesium phosphate, calcium hydrogen phosphate, dalcium biphosphate
Combination in any；Described soluble ferric iron salt is one or more combination in any of iron sulfate, ferrous sulfate, iron chloride；Institute
State one or more the combination in any that inorganic clay is bentonite, Kaolin, meerschaum, attapulgite, zeolite；Organic
Chelating agen is humic acids and one or both combination of biological black wood charcoal；Described silicon dioxide is selected from ground quartz sand, titanium dioxide
Si powder, one or more combination in any of glass powder.
The reparation medicament of Compound Heavy Metals soil the most according to claim 1 and 2, it is characterised in that described oxidation
Magnesium is light calcined magnesia.
The reparation medicament of Compound Heavy Metals soil the most according to claim 4, it is characterised in that described light-burned oxidation
The specific surface area of magnesium is 5～20m2/g。
The reparation medicament of Compound Heavy Metals soil the most according to claim 5, it is characterised in that described light-burned oxidation
The preparation method of magnesium is as follows: take one of which or a combination thereof of magnesite, shepardite, periclase and dolomite, at 800-1000
Calcine at DEG C, to obtain final product.
The reparation medicament of Compound Heavy Metals soil the most according to claim 3, it is characterised in that described humic acid
The content of organic matter is maintained at more than 30%；The preparation method of described biological black wood charcoal is as follows: take bamboo, rice husk, Pericarppium arachidis hypogaeae or wheat straw
One in stalk, at 500-800 DEG C, thermal cracking half an hour, to obtain final product.
8. the preparation method repairing medicament of the Compound Heavy Metals soil described in any one of claim 1 ~ 7, its feature exists
In, comprise the steps: that taking each composition mixes and get final product.
9. the reparation medicament repairing heavy metal pollution soil of application Compound Heavy Metals soil described in any one of claim 1 ~ 7
The method of earth, it is characterised in that comprise the steps:
(1) described heavy-metal contaminated soil reparation medicament is uniformly mixed with heavy-metal contaminated soil；
(2) maintenance: through the outdoor maintenance of 24-48 hour.
Method the most according to claim 9, it is characterised in that step (1) is: repaired by described heavy-metal contaminated soil
Medicament is uniformly mixed according to mass ratio 2%-30% with heavy-metal contaminated soil, adds water and makes the moisture content of mixture be maintained at
20%-50%。
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| CN108906877A (en) * | 2018-08-07 | 2018-11-30 | 湖南艾布鲁环保科技股份有限公司 | For repairing the soil activating agent, preparation method and its application of As polluted soil |
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| CN114517095A (en) * | 2022-01-11 | 2022-05-20 | 中交三航局第八工程(湖南)有限公司 | Roadbed improver for heavy metal contaminated soil and application thereof |
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