CN107365584A - A kind of broad spectrum type heavy-metal contaminated soil stabilization agent - Google Patents
A kind of broad spectrum type heavy-metal contaminated soil stabilization agent Download PDFInfo
- Publication number
- CN107365584A CN107365584A CN201710652444.7A CN201710652444A CN107365584A CN 107365584 A CN107365584 A CN 107365584A CN 201710652444 A CN201710652444 A CN 201710652444A CN 107365584 A CN107365584 A CN 107365584A
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- contaminated soil
- metal contaminated
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- stabilization agent
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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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
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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 a kind of broad spectrum type heavy-metal contaminated soil stabilization agent, by mass percentage comprising following components：Double superhosphate 20~40%, ferrous sulfate heptahydrate 0~30%, diatomite 0~10%, concave convex rod 0~10%, montmorillonite 10~20%, kaolin 5~15%, talcum powder 5~10%, magnalium hydrotalcite 0 10%, bentonite 5~15%.Heavy metal contaminated soil carries out quenched pretreatment to the medicament first when in use, adjusts the physicochemical property of soil；Stabilization agent is added again into contaminated soil and is well mixed, and is finally adjusted soil moisture content, is then conserved.Broad spectrum type heavy-metal contaminated soil stabilization agent provided by the invention, it is cheap and easy to get, safe and reliable, easy to use, various heavy pollution can be directed to carry out effective stabilize and repair.
Description
Technical field
The present invention relates to a kind of contaminated site to repair medicament, in particular it relates to which one kind can be applied to heavy-metal contaminated soil
Stabilize the broad spectrum type stabilization agent repaired.
Background technology
With developing rapidly for industrial or agricultural, and in evolution corresponding environmentally friendly technical measures and management means missing,
A large amount of pollutants are caused to enter soil environment system.Once the amount of pollutant into soil exceedes the self-purification capacity of soil in itself,
Soil function and structural damage will be caused, poisonous and harmful substance will accumulate in soil, and can by certain direct or
Indirect approach enters human body, is detrimental to health.
The heavy metal pollution of soil is widely present in China to a certain extent.There is common heavy metal contaminants in soil
Mercury, cadmium, lead, arsenic, copper, nickel, zinc, antimony and Cr VI etc..Heavy metal pollution of soil has cumulative bad and irreversibility etc. prominent special
Sign, selectable recovery technique is accordingly less, and stabilization technology particularly dystopy stabilization technology is at present both at home and abroad for weight
One main recovery technique of metallic pollution soil.
The stabilisation reparation of heavy-metal contaminated soil refers to add appropriate targetedly heavy metal stabilization in contaminated soil
Chemical drug agent, by the way that absorption, precipitation, complexing, ion exchange and redox etc. one occurs between medicament and heavy metal pollution of soil thing
Series effect, by physics, chemistry or it is physicochemical in the form of change existing forms of the heavy metal contaminants in soil, reduce
Toxicity, dissolubility, transportable property and the bioavailability of heavy metal contaminants, so as to reach reduction health risk and realize
The purpose of repairing effect.It is heavy metal-polluted at home in the case of existing soil restoring technology level and recovery project practical experience
Dye soil stabilization recovery technique is used widely because of its low, efficiency high of input, the reparation advantage such as quick, simple to operate.
In view of will exist in the diversity of heavy metal pollution of soil species, or even same plot contaminated soil it is a variety of not
Same heavy metal contaminants；In addition the earth volume of heavy-metal contaminated soil is often also relatively large, and stabilize needs in repair process
Larger amount of stabilization agent is wanted to add.Therefore, for it is a kind of it is cheap and easy to get, safe and reliable, easy to use, can be directed to it is a variety of heavy
The demand that metallic pollution carries out the effective broad spectrum type heavy-metal contaminated soil stabilization agent for stabilizing and repairing is more urgent.
The content of the invention
It is an object of the invention to provide a kind of the medicament repaired, cheap and easy to get, peace are stabilized for heavy-metal contaminated soil
It is complete it is reliable, easy to use, can carry out effective stabilizing reparation for various heavy pollution.
In order to achieve the above object, the invention provides a kind of broad spectrum type heavy-metal contaminated soil stabilization agent, wherein,
Described medicament includes following components by mass percentage：Double superhosphate 20~40%, ferrous sulfate heptahydrate 0~30%,
Diatomite 0~10%, concave convex rod 0~10%, montmorillonite 10~20%, kaolin 5~15%, talcum powder 5~10%, magnalium water
Talcum 0-10%, bentonite 5~15%.
The Compositional type stabilization agent is mainly made up of clay mineral, phosphate and ferrous salt.Select clay pit owner
If there is absorption and the stable mechanism of ion exchange of broad spectrum activity feature using it；Further to increase its universality, selection
A variety of clay minerals cheap and easy to get, nontoxic are compounded, include diatomite, concave convex rod, montmorillonite, kaolin,
Talcum powder, magnalium hydrotalcite and bentonite etc., there is preferable stabilization effect to heavy metals such as cadmium, lead, copper, nickel, zinc.Phosphoric acid
Salt is respectively provided with preferably precipitation stabilization effect to heavy metals such as lead, antimony, cadmium, copper, nickel, zinc, and available phosphorus is have selected in the present invention
Content is higher and same cheap and easy to get and calcium superphosphate with preferable soil fertility is as in Compositional type stabilization agent
A kind of main formula composition.Ferrous sulfate has stronger reproducibility, and direct stabilized Cr VI can will be difficult in soil
Either quinquevalence antimony, which is reduced into, facilitates stabilized trivalent chromium or trivalent antimony, and this kind of heavy metal in soil can be helped to realize stabilization
Change；Simultaneously for arsenic etc., the heavy metal of coprecipitation reaction can occurs in some with molysite, and ferrous sulfate equally has certain stabilization
Change effect, therefore also select ferrous sulfate heptahydrate as a kind of formula components in formula.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described medicament, its in the preparation, first
The solid powder of each component is weighed respectively by the formula rate of setting, then respectively by the further powder of the solid powder of each component
It is broken, finally each component after crushing is uniformly mixed again.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described medicament, the solid powder of its each component
Material is further crushed to the mesh of particle diameter 200.That is, reagent combination ratio is adjusted according to heavy metal pollution of soil type first, and passed through
Laboratory lab scale determines end formulation；Then each component, and consolidating each component respectively are weighed respectively by the formula rate of setting
Body powder is crushed to 200 mesh or so in mechanical crusher；The last component after all kinds of crushing is placed in agitator again is stirred
Uniformly, and packed for standby use is carried out.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described medicament, counterweight first when in use
Metallic pollution soil carries out necessary quenched pretreatment, adjusts the physicochemical properties such as moisture content, pH value and the viscosity of soil；Throw again
Add stabilization agent into contaminated soil and be well mixed, finally adjust soil moisture content, then conserved.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described pretreatment, comprising：As needed
The quality of the heavy-metal contaminated soil of processing, the quick lime or dry wood chip for adding 0.5~2.0% mass ratio adjust the aqueous of soil
Rate.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described medicament, its dosage is located with needing
The mass ratio of the heavy-metal contaminated soil of reason is 2~6%.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described medicament, pass through water spray etc. after adding
Form adjusts soil moisture content to 25~30%.
Above-mentioned broad spectrum type heavy-metal contaminated soil stabilization agent, wherein, described maintenance, its time is 3~7 days.
Broad spectrum type heavy-metal contaminated soil stabilization agent provided by the invention has advantages below：
(1) broad spectrum activity of target contaminant, there is good stabilisation to a variety of common heavy metal contaminants in soil
Repairing effect.
(2) medicament stock is the common raw material of industry, construction material or agricultural fertilizer, cheap and easily-available, nontoxic,
It is small to soil adverse effect after addition, have substantially no effect on soil fertility or even soil fertility can be increased.
(3) stabilization agent preparation and use it is simple and convenient, chemical stabilization repairing effect is good, the maintenance after dispensing
Time is short.
Embodiment
The embodiment of the present invention is further described below.
Broad spectrum type heavy-metal contaminated soil stabilization agent provided by the invention, include by mass percentage with the following group
Point：Double superhosphate 20~40%, ferrous sulfate heptahydrate 0~30%, diatomite 0~10%, concave convex rod 0~10%, montmorillonite
10~20%, kaolin 5~15%, talcum powder 5~10%, magnalium hydrotalcite 0-10%, bentonite 5~15%.
The Compositional type stabilization agent is mainly made up of clay mineral, phosphate and ferrous salt.Select clay pit owner
If there is absorption and the stable mechanism of ion exchange of broad spectrum activity feature using it；Further to increase its universality, selection
A variety of clay minerals cheap and easy to get, nontoxic are compounded, include diatomite, concave convex rod, montmorillonite, kaolin,
Talcum powder, magnalium hydrotalcite and bentonite etc., there is preferable stabilization effect to heavy metals such as cadmium, lead, copper, nickel, zinc.Phosphoric acid
Salt is respectively provided with preferably precipitation stabilization effect to heavy metals such as lead, antimony, cadmium, copper, nickel, zinc, and available phosphorus is have selected in the present invention
Content is higher and same cheap and easy to get and calcium superphosphate with preferable soil fertility is as in Compositional type stabilization agent
A kind of main formula composition.Ferrous sulfate has stronger reproducibility, and direct stabilized Cr VI can will be difficult in soil
Either quinquevalence antimony, which is reduced into, facilitates stabilized trivalent chromium or trivalent antimony, and this kind of heavy metal in soil can be helped to realize stabilization
Change；Simultaneously for arsenic etc., the heavy metal of coprecipitation reaction can occurs in some with molysite, and ferrous sulfate equally has certain stabilization
Change effect, therefore also select ferrous sulfate heptahydrate as a kind of formula components in formula.
Medicament in the preparation, weighs the solid powder of each component respectively by the formula rate of setting first, then respectively will
The solid powder of each component is further crushed to the mesh of particle diameter 200, is finally again uniformly mixed each component after crushing.That is,
Reagent combination ratio is adjusted according to heavy metal pollution of soil type first, and end formulation is determined by laboratory lab scale；Then
Each component is weighed respectively by the formula rate of setting, and is respectively crushed to the solid powder of each component in mechanical crusher
200 mesh or so；The last component after all kinds of crushing is placed in agitator again stirs, and carries out packed for standby use.
Heavy metal contaminated soil carries out necessary quenched pretreatment to medicament first when in use, adjusts the aqueous of soil
The physicochemical properties such as rate, pH value and viscosity；Pretreatment includes the quality of the heavy-metal contaminated soil handled as needed, adds
The moisture content of the quick lime of 0.5~2.0% mass ratio or dry wood chip regulation soil.Stabilization agent is added again into contaminated soil
And be well mixed, added amount of chemical is 2~6% with needing the mass ratio of heavy-metal contaminated soil to be processed.Finally adjust soil
Moisture content, pass through the form such as spray water after adding of agent and adjust soil moisture content to 25~30%.Then conserved, curing time
For 3~7 days.
Specifically, broad spectrum type heavy-metal contaminated soil stabilization agent provided by the invention, specifically used method are as follows：
(1) necessary quenched pretreatment is carried out to the heavy-metal contaminated soil excavated first, by adding 0.5-2.0%
The quick lime of mass ratio or dry wood chip and be sufficiently mixed the mode of stirring with contaminated soil adjust the moisture content of soil,
The physicochemical property such as pH value and viscosity.Quick lime or dry wood chip also have certain to heavy metals such as the mercury in contaminated soil, zinc
Stabilization processes effect.
(2) small-scale experiment is stabilized by heavy-metal contaminated soil and determines that the specific of stabilization agent adds ratio, according to
Contaminated soil amount calculate and weigh respective amount stabilization agent it is quantitative add into polluted soil, and mixed with special-purpose machinery
Conjunction stirs.The addition mass ratio of general stabilization agent is 2~6%.
(3) moisture content is adjusted by forms such as water sprays while stabilization agent is added to contaminated soil side, or steady
Determine by adjusting soil moisture content to forms such as soil heap body waterings after the completion of chemical drug agent is added, to ensure stabilization agent and soil
Target contaminant has a good reaction environment in earth.Soil moisture content is adjusted to 25~30% or so, with mixed soil
Heap moistens but still shaping is advisable.
(4) soil after above-mentioned processing will be completed to conserve 3 to 7 days, sampling analysis stabilizes repairing effect.
Broad spectrum type heavy-metal contaminated soil stabilization agent provided by the invention is done further with reference to embodiment
Description.
Embodiment 1.
Certain is by heavy metal lead and antimony pollution soil, and the wherein concentration of lead is in 1000mg/kg or so, and the concentration of antimony is in 20mg/
Kg or so.The average leaching concentration of antimony and lead (leaching of nitric acid-sulfuric acid method) is respectively 0.056mg/ in contaminated soil before repair process
L and 0.012mg/L, after processing to be repaired the reparation target of heavy metal in soil leaching concentration be respectively 0.01mg/L and
0.005mg/L.Repair process is carried out to above-mentioned heavy-metal contaminated soil using dystopy Stabilization Remediation Technology, according to soil stabilization
Change the result for repairing lab scale, the formula rate of the stabilization agent of use is as follows：Double superhosphate 25%, ferrous sulfate heptahydrate
25%, montmorillonite 15%, kaolin 10%, talcum powder 10%, bentonite 15%.
Stabilize quick lime when repairing first by 2% mass ratio and quenched pretreatment, Ran Houxiang are carried out to contaminated soil
The stabilization agent of 4% mass ratio is uniformly added in contaminated soil and is stirred using mechanical agitation facility, then it is equal to mixing
Sprinkled water after even in soil and adjust soil moisture content to 25% or so, finally conserved 5 days.Conserve after terminating through detection, Polluted Soil
The leaching concentration of lead is respectively less than 0.0006mg/L in earth, and the leaching concentration of antimony is respectively less than 0.0037mg/L, meets that repairing target wants
Ask.
Broad spectrum type heavy-metal contaminated soil stabilization agent provided by the invention, it is that one kind is cheap and easy to get, safe and reliable, makes
With it is convenient, can carry out the effective broad spectrum type heavy-metal contaminated soil stabilization chemical drug for stabilizing reparation for various heavy pollution
Agent, there is good stabilisation repairing effect to a variety of common heavy metal contaminants in soil, raw material is cheap and easily-available, nontoxic nothing
Evil, it is small to soil adverse effect after addition, have substantially no effect on soil fertility or even soil fertility, chemical stabilization reparation can be increased
Effect is good, and the curing time after dispensing is short.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of broad spectrum type heavy-metal contaminated soil stabilization agent, it is characterised in that described medicament is by mass percentage
Include following components：Double superhosphate 20~40%, ferrous sulfate heptahydrate 0~30%, diatomite 0~10%, concave convex rod 0~
10%, montmorillonite 10~20%, kaolin 5~15%, talcum powder 5~10%, magnalium hydrotalcite 0-10%, bentonite 5~
15%.
2. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 1, it is characterised in that described medicament,
It weighs the solid powder of each component respectively by the formula rate of setting first in the preparation, then consolidating each component respectively
Body powder further crushes, and is finally again uniformly mixed each component after crushing.
3. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 2, it is characterised in that described medicament,
The solid powder of its each component is further crushed to the mesh of particle diameter 200.
4. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 3, it is characterised in that described medicament,
Heavy metal contaminated soil carries out quenched pretreatment first when in use, adjusts the physicochemical property of soil；Stable chemical drug is added again
Agent is into contaminated soil and is well mixed, and finally adjusts soil moisture content, is then conserved.
5. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 4, it is characterised in that described pre- place
Reason, comprising：The quality of the heavy-metal contaminated soil handled as needed, add the quick lime of 0.5~2.0% mass ratio or dry wood
The moisture content of bits regulation soil.
6. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 4, it is characterised in that described medicament,
Its dosage is 2~6% with needing the mass ratio of heavy-metal contaminated soil to be processed.
7. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 4, it is characterised in that described medicament,
Soil moisture content is adjusted after adding to 25~30%.
8. broad spectrum type heavy-metal contaminated soil stabilization agent as claimed in claim 4, it is characterised in that described maintenance,
Its time is 3~7 days.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879850A (en) * | 2017-11-28 | 2018-04-06 | 湖南本农环境科技有限公司 | A kind of acid heavy metal polluted soil of farmland conditioner and its preparation method and application |
| CN108342194A (en) * | 2018-01-16 | 2018-07-31 | 航天凯天环保科技股份有限公司 | A kind of medicament for sulphide staining soil stabilization |
| CN108841388A (en) * | 2018-07-05 | 2018-11-20 | 北京泷涛环境修复有限公司 | It is a kind of for the medicament of cobalt pollution soil remediation, preparation method and restorative procedure |
| CN109092878A (en) * | 2018-07-04 | 2018-12-28 | 北京高能时代环境技术股份有限公司 | It is a kind of for handling the stabilization agent and method of heavy-metal composite pollution soil |
| CN109570218A (en) * | 2018-11-08 | 2019-04-05 | 湖南农业大学 | A kind of stabilization agent of arsenic, stibium heavy metal contaminated soil |
| CN110076185A (en) * | 2019-05-10 | 2019-08-02 | 生态环境部南京环境科学研究所 | A kind of method of remediating heavy metal and polycyclic aromatic hydrocarbon composite pollution soil |
| CN110358543A (en) * | 2019-07-30 | 2019-10-22 | 上海格林曼环境技术有限公司 | A kind of medicament that the stabilisation for mercury contaminated soil is repaired |
| CN110616073A (en) * | 2019-03-31 | 2019-12-27 | 上海康恒环境修复有限公司 | Agent for efficiently treating high-concentration arsenic and antimony polluted soil and application thereof |
| CN111100647A (en) * | 2019-11-18 | 2020-05-05 | 湖南金旅环保股份有限公司 | Oxygen-containing anionic heavy metal contaminated soil stabilization remediation agent and soil remediation method |
| CN112919752A (en) * | 2020-12-08 | 2021-06-08 | 金风环保有限公司 | Method for preparing sludge treatment agent and method for treating sludge |
| CN114350374A (en) * | 2022-01-05 | 2022-04-15 | 中国农业大学 | Heavy metal contaminated soil conditioner and application thereof |
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| CN107879850A (en) * | 2017-11-28 | 2018-04-06 | 湖南本农环境科技有限公司 | A kind of acid heavy metal polluted soil of farmland conditioner and its preparation method and application |
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| CN108342194A (en) * | 2018-01-16 | 2018-07-31 | 航天凯天环保科技股份有限公司 | A kind of medicament for sulphide staining soil stabilization |
| CN109092878A (en) * | 2018-07-04 | 2018-12-28 | 北京高能时代环境技术股份有限公司 | It is a kind of for handling the stabilization agent and method of heavy-metal composite pollution soil |
| CN108841388A (en) * | 2018-07-05 | 2018-11-20 | 北京泷涛环境修复有限公司 | It is a kind of for the medicament of cobalt pollution soil remediation, preparation method and restorative procedure |
| CN109570218A (en) * | 2018-11-08 | 2019-04-05 | 湖南农业大学 | A kind of stabilization agent of arsenic, stibium heavy metal contaminated soil |
| CN110616073A (en) * | 2019-03-31 | 2019-12-27 | 上海康恒环境修复有限公司 | Agent for efficiently treating high-concentration arsenic and antimony polluted soil and application thereof |
| CN110076185A (en) * | 2019-05-10 | 2019-08-02 | 生态环境部南京环境科学研究所 | A kind of method of remediating heavy metal and polycyclic aromatic hydrocarbon composite pollution soil |
| CN110358543A (en) * | 2019-07-30 | 2019-10-22 | 上海格林曼环境技术有限公司 | A kind of medicament that the stabilisation for mercury contaminated soil is repaired |
| CN111100647A (en) * | 2019-11-18 | 2020-05-05 | 湖南金旅环保股份有限公司 | Oxygen-containing anionic heavy metal contaminated soil stabilization remediation agent and soil remediation method |
| CN111100647B (en) * | 2019-11-18 | 2021-04-27 | 湖南金旅环保股份有限公司 | Oxygen-containing anionic heavy metal contaminated soil stabilization remediation agent and soil remediation method |
| CN112919752A (en) * | 2020-12-08 | 2021-06-08 | 金风环保有限公司 | Method for preparing sludge treatment agent and method for treating sludge |
| CN114350374A (en) * | 2022-01-05 | 2022-04-15 | 中国农业大学 | Heavy metal contaminated soil conditioner and application thereof |
| CN114350374B (en) * | 2022-01-05 | 2022-11-01 | 中国农业大学 | Heavy metal contaminated soil conditioner and application thereof |
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