CN106433668A - Heavy metal pollution soil restoration agent and use method thereof - Google Patents
Heavy metal pollution soil restoration agent and use method thereof Download PDFInfo
- Publication number
- CN106433668A CN106433668A CN201610773209.0A CN201610773209A CN106433668A CN 106433668 A CN106433668 A CN 106433668A CN 201610773209 A CN201610773209 A CN 201610773209A CN 106433668 A CN106433668 A CN 106433668A
- Authority
- CN
- China
- Prior art keywords
- soil
- heavy
- contaminated soil
- heavy metal
- curing
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a heavy metal pollution soil restoration agent, and relates to a soil restoration agent. The restoration agent comprises a pretreatment curing ingredient and an excitation curing ingredient, wherein the pretreatment curing ingredient comprises modified expanded vermiculite; the excitation curing ingredient comprises 4 to 18 percent of slaked lime, 4 to 10 percent of chitosan, 16 to 34 percent of water glass and 45 to 60 percent of fly ash. The heavy metal pollution soil restoration agent and the use method have the advantages that the efficient curing of soil heavy metal can be realized; the soil heavy metal pollution problem is solved; in addition, the high acidity or high alkality and secondary pollution can be effectively avoided; the uniformity of environment benefits and social benefits is realized.
Description
Technical field：
The present invention relates to a kind of soil-repairing agent, be specifically related to a kind of heavy-metal contaminated soil renovation agent and using method.
Background technology：
With China's industrialization, the fast development of urbanization, massive discharge of pollutant, the making of defective agricultural material
With, the unreasonable exploitation etc. of mineral resources so that heavy metal constantly enters in soil environment, after it is accumulated over a certain amount of
Will result in the pollution of soil.At present, heavy metal pollution of soil has become one of significant bottleneck of restriction China's agricultural development, also
The safety making the agricultural product of China faces serious threat.Therefore the soil for heavy metal pollution carries out reparation and becomes current weight
The study hotspot wanted.At present, heavy metal-polluted soil recovery technique mainly has phytoremediation technology, cement solidification stabilisation, soil to wash
De-, Electrodynamic force method etc..On the one hand, these method efficiency are low, take effect slow, and cost is high, is unfavorable for promoting on a large scale in reality
Application；On the other hand, existing soil-repairing agent is mostly in highly acid or strong basicity, does not in use only exist safety hidden
Suffer from, and the ecological environment around field of employment can be damaged, cause secondary pollution.Thus, seek raw material cheap and easy to get,
Improve compression strength, the water resistance of soil-repairing agent, seek new curing mechanism, become the emphasis of heavy metal soil remediation
Direction.
Content of the invention：
For weak point of the prior art, the invention provides a kind of heavy-metal contaminated soil renovation agent and user
Method.It utilizes soil-repairing agent regulation heavy-metal contaminated soil environmental condition, by control condition of cure, changes the shape of heavy metal
State, water solubility and animal migration, reduce its biological effectiveness in the environment, reduces its migration to other environmental systems.Effectively
Solve heavy metal pollution of soil problem, it is achieved pollute the chemical redemption of environment；By reducing pollutant physics and chemical availability,
It is finally reached the innoxious purpose of contaminated soil.
A kind of heavy-metal contaminated soil renovation agent, this renovation agent includes pretreatment curing component and solidification component, institute
The pretreatment curing component stated includes modified expanded vermiculite；Described solidification component includes that calcium hydroxide 4%～18%, shell gather
Sugar 4%～10%, waterglass 16%～34% and flyash 45%～60%.
The processing method of described modified expanded vermiculite is put in the standard screen of 100 mesh after first grinding expanded vermiculite
Row filter is entered to it, secondly the expanded vermiculite after screening is placed into inside heating furnace, carry out calcination processing, calcining temperature to it
Degree is 150 DEG C～300 DEG C, and calcination time is 1 hour to 3 hours, takes out after finally naturally cooling down it.
The acquisition mode of described calcium hydroxide, is first placed into quick lime inside container, after container adds suitable quantity of water
Being stirred uniformly, reaction obtains calcium hydroxide after completing, and is placed into calcium hydroxide in the standard screen that fineness is less than 200 mesh, utilizes
Calcium hydroxide is screened by standard screen.
Described quick lime includes calcium oxide, manganese oxide, di-iron trioxide, alundum (Al2O3) and the crystallization water, wherein aoxidizes
The content of calcium accounts for more than the 70% of quick lime total amount.
N-deacetylation content in described shitosan is 55%～70%；The form of described waterglass is fixing shape
And be soluble solids, it is desirable to solubility >=95% of waterglass.
Described flyash includes silica, alundum (Al2O3), di-iron trioxide, calcium oxide, iron oxide, titanium dioxide
Flyash is placed into granularity and enters row filter less than the standard screen of 200 mesh by the components such as titanium, magnesia, sodium oxide molybdena and potassium oxide, powder
The loss on ignition of coal ash is less than 15%.
It is quenched that the method step one carries out contaminated soil, and step 2 is modified vermiculite mix precuring, and step 3 is carried out
Excited inorganic solidifies, and step 4 carries out maintenance.
The quenched method of described contaminated soil is：Contaminated soil is placed in the standard screen that fineness is 10 mesh and sieves
Choosing, adds water, the water content of contaminated soil is adjusted to 20%～35% in the container after screening；Water content will be regulated
Contaminated soil and modified expanded vermiculite press 1:The quality of 35～45, than mix, is aged 1 day～3 days after abundant mix；By old
Soil after change presses 1：The mix proportions of 20～30 mixes solidification component, carries out curing after abundant mix.
Curing ambient humidity is more than 90%, and curing time is 15 days～35 days.
The invention has the beneficial effects as follows：It is one that component modification expanded vermiculite is fixed in the pretreatment containing in renovation agent of the present invention
Kind there are excellent absorption property, the lamellar aluminosilicate mineral of ion-exchange performance, can be effectively in the exchange adsorption soil liquid
Heavy metal ion, be fixed in its interlamination region, reduce its mobility and the toxic action to organism.And solidification
Component can pass through self-excitation effect, the dignified structure of activity silicon containing component containing aluminium structure glue that will wherein contain, and is formed with alumina four
Heavy metal in soil is carried out further effectively by the gel solidification construction unit of face body and silicon-oxy tetrahedron in the process
Solidification, promote its solidification effect.The solidification of this dual cure effect heavy metal soil can also according to the character of soil,
The form of content of beary metal and existence thereof adjusts between component the mass fraction shared by active principle in ratio and component, thus carries
The fixed effect of the heavy metal soil to various pollution types for the principle of readjustment, restructuring, consolidation and improvement.
Can obtain when utilizing this renovation agent curing soil solidification closely, soil body amount of contraction is little and is not likely to produce consolidating of be full of cracks
Changing body, therefore impervious, the freeze proof/cracking resistance of firming body is preferable, and preferably solving conventional curing material curing soil is to deposit
Water stability difference, the problem such as drying shrinkage is big, easy to crack, and cured soil is not easy to " secondary argillization " phenomenon occur.
This soil-repairing agent technique is simple simultaneously, and raw material sources are extensive, cheap and easy to get, be easy to the advantages such as site operation, can extensively use
In the heavy metal soil remediation of China, prevent heavy metal soil from producing toxic action to underground water and organism, play reparation and
The double action of protection environment.
Detailed description of the invention：
In conjunction with specific embodiments the present invention is further described：
Embodiment one：
A kind of heavy-metal contaminated soil renovation agent and using method, it is swollen that this renovation agent contains pretreatment curing component modification
Swollen vermiculite, its modifying process is the fineness that modified expanded vermiculite was ground to 100 mesh standard sieves, then to it at 150 DEG C of bars
Carry out under part calcining 3 hours；Solidification component is equal by calcium hydroxide the 8%th, shitosan the 10%th, waterglass the 22%th, flyash 60%
Even mix.200 mesh fineness crossed by its medium-slaking lime, and before digestion, calcium content is 85%；Shitosan N-deacetylation content is
55%；Waterglass is solid-state, and solid content is 95%；Fineness of pulverized-coal ash crosses 200 mesh, and loss on ignition is 5%.
By above-mentioned modified expanded vermiculite according to 1:The mass ratio of 35 with carry out quenched lead, zinc, arsenic heavy metal pollution in advance
It is uniform that soil (crossing 10 mesh standard sieves, water content is 35%) carries out precuring mix, rear ageing 1 day；Press 1 again:The mass ratio of 20
Mix above-mentioned solidification agent, maintenance 15 days under conditions of humidity is more than 90% after mixing；Weight in cured rear soil
The Leaching of metal is substantially reduced.
Embodiment two：
A kind of heavy-metal contaminated soil renovation agent and using method, it is swollen that this renovation agent contains pretreatment curing component modification
Swollen vermiculite, its modifying process is the fineness that modified expanded vermiculite was ground to 100 mesh standard sieves, then to it at 300 DEG C of bars
Carry out under part calcining 1 hour；Solidification component is equal by calcium hydroxide the 11%th, shitosan the 10%th, waterglass the 34%th, flyash 45%
Even mix.200 mesh fineness crossed by its medium-slaking lime, and before digestion, calcium content is 80%；Shitosan N-deacetylation content is
70%；Waterglass is solid-state, and solid content is 95%；Fineness of pulverized-coal ash crosses 200 mesh, and loss on ignition is 8%.
By above-mentioned modified expanded vermiculite according to 1:The mass ratio of 45 with carry out quenched lead, cadmium heavy-metal contaminated soil in advance
It is uniform that (crossing 10 mesh standard sieves, water content is 20%) carries out precuring mix, rear ageing 3 days；Press 1 again:The mass ratio of 30 mixes
Above-mentioned solidification agent, maintenance 35 days under conditions of humidity is more than 90% after mixing；Cured rear heavy metal in soil
Leaching be substantially reduced.
Embodiment three：
A kind of heavy-metal contaminated soil renovation agent and using method, it is swollen that this renovation agent contains pretreatment curing component modification
Swollen vermiculite, its modifying process is the fineness that modified expanded vermiculite was ground to 100 mesh standard sieves, then to it at 200 DEG C of bars
Carry out under part calcining 2 hours；Solidification component is uniform by calcium hydroxide the 4%th, shitosan the 4%th, waterglass the 34%th, flyash 58%
Mix；200 mesh fineness crossed by its medium-slaking lime, and before digestion, calcium content is 83%；Shitosan N-deacetylation content is 65%；
Waterglass is solid-state, and solid content is 97%；Fineness of pulverized-coal ash crosses 200 mesh, and loss on ignition is 10%.
By above-mentioned modified expanded vermiculite according to 1:The mass ratio of 40 with carry out quenched copper, zinc heavy-metal contaminated soil in advance
It is uniform that (crossing 10 mesh standard sieves, water content is 25%) carries out precuring mix, rear ageing 2 days；Press 1 again:The mass ratio of 25 mixes
Above-mentioned solidification agent, maintenance 30 days under conditions of humidity is more than 90% after mixing；Cured rear heavy metal in soil
Leaching be substantially reduced.
Using effect is tested：
This research is tested by different heavy-metal contaminated soils by 10 pieces, investigates this heavy-metal contaminated soil renovation agent
The effect of each side.Test event standard is：
Embodiment one data
Embodiment two data
Embodiment three data
In sum, the present invention its be possible not only to realize the efficient solidification of heavy metal-polluted soil, solve heavy metal pollution of soil
Problem, and can effectively avoid in strong acid or strong basicity and secondary pollution, it is achieved the system of environmental benefit and social benefit
One.
For a person skilled in the art, can be made other various accordingly according to above technical scheme and design
Change and deformation, and all these change and deformation all should belong within the protection domain of the claims in the present invention.
Claims (9)
1. a heavy-metal contaminated soil renovation agent, it is characterised in that：This renovation agent includes pretreatment curing component and excites solid
Changing component, described pretreatment curing component includes modified expanded vermiculite；Described solidification component include calcium hydroxide 4%～
18%th, shitosan 4%～10%, waterglass 16%～34% and flyash 45%～60%.
2. heavy-metal contaminated soil renovation agent according to claim 1, it is characterised in that：Described modified expanded vermiculite
First processing method for entering row filter by being put in the standard screen of 100 mesh after expanded vermiculite grinding to it, after secondly screening
Expanded vermiculite be placed into inside heating furnace, calcination processing is carried out to it, calcining heat is 150 DEG C～300 DEG C, and calcination time is
1 hour to 3 hours, take out after finally it being cooled down naturally.
3. heavy-metal contaminated soil renovation agent according to claim 1, it is characterised in that：The acquisition side of described calcium hydroxide
Formula, is first placed into quick lime inside container, stirs after container adds suitable quantity of water, and reaction is disappeared after completing
Calcium hydroxide is placed in the standard screen of 200 mesh by lime, utilizes standard screen to screen calcium hydroxide.
4. heavy-metal contaminated soil renovation agent according to claim 3, it is characterised in that：Described quick lime includes oxidation
Calcium, manganese oxide, di-iron trioxide, alundum (Al2O3) and the crystallization water, wherein the content of calcium oxide accounts for the 70% of quick lime gross mass
Above.
5. heavy-metal contaminated soil renovation agent according to claim 1, it is characterised in that：The described N-in shitosan takes off
Acetyl degree content is 55%～70%；The form of described waterglass is for fixing shape and being soluble solids, it is desirable to waterglass
Solubility >=95%.
6. heavy-metal contaminated soil renovation agent according to claim 1, it is characterised in that：Described flyash includes dioxy
The groups such as SiClx, alundum (Al2O3), di-iron trioxide, calcium oxide, iron oxide, titanium dioxide, magnesia, sodium oxide molybdena and potassium oxide
Point, the standard screen that flyash is placed into 200 mesh enters row filter, and the loss on ignition of flyash is less than 15%.
7. the using method of a heavy metal species soil-repairing agent, it is characterised in that：The method step one carries out heavy metal polluted soil
Earth is quenched, and step 2 is modified vermiculite mix precuring, and step 3 carries out excited inorganic solidification, and step 4 carries out maintenance.
8. the using method of heavy metal soil-repairing agent according to claim 7, it is characterised in that：Described contaminated soil
Quenched method is：Contaminated soil is placed in the standard screen that fineness is 10 mesh and enters row filter, in the container after screening
Add water, the water content of contaminated soil is adjusted to 20%～35%；By regulate the contaminated soil of water content with modified expanded
Vermiculite presses 1:The quality of 35～45, than mix, is aged 1 day～3 days after abundant mix；Soil after ageing is pressed 1:20～30
Mix proportions mix solidification component, carry out curing after abundant mix.
9. the using method of heavy metal soil-repairing agent according to claim 8, it is characterised in that：Curing environment
Humidity is more than 90%, and curing time is 15 days～35 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610773209.0A CN106433668A (en) | 2016-08-30 | 2016-08-30 | Heavy metal pollution soil restoration agent and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610773209.0A CN106433668A (en) | 2016-08-30 | 2016-08-30 | Heavy metal pollution soil restoration agent and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106433668A true CN106433668A (en) | 2017-02-22 |
Family
ID=58090610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610773209.0A Pending CN106433668A (en) | 2016-08-30 | 2016-08-30 | Heavy metal pollution soil restoration agent and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106433668A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903132A (en) * | 2017-03-09 | 2017-06-30 | 西北农林科技大学 | A kind of method of stable environment medium cationic heavy metal contaminants |
| CN108672482A (en) * | 2018-04-20 | 2018-10-19 | 南安市创培电子科技有限公司 | One heavy metal species fixative and heavy-metal contaminated soil curing |
| CN110982535A (en) * | 2019-12-19 | 2020-04-10 | 江苏华东新能源勘探有限公司（江苏省有色金属华东地质勘查局八一三队） | Biomass charcoal soil heavy metal restoration agent and application method thereof |
| CN111073658A (en) * | 2019-11-21 | 2020-04-28 | 河北建设集团安装工程有限公司 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
| CN113293003A (en) * | 2021-04-17 | 2021-08-24 | 江西源春环保科技有限公司 | Method for restoring mine polluted soil |
| CN114989832A (en) * | 2022-05-13 | 2022-09-02 | 华侨大学 | CSGP reagent for repairing beach polluted soil and application method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102598911A (en) * | 2012-03-29 | 2012-07-25 | 常熟市佳盛农业科技发展有限公司 | Method for remedying heavy metal polluted mining soil |
| CN103933696A (en) * | 2014-03-19 | 2014-07-23 | 上海鼓华生态科技有限公司 | Curing agent for curing and stabilization of poisonous and harmful solid waste |
| CN104311235A (en) * | 2014-09-26 | 2015-01-28 | 赵刚 | Special slow release composite fertilizer for red jujubes and preparation method of special slow release composite fertilizer |
| CN104403675A (en) * | 2014-09-28 | 2015-03-11 | 上海化工研究院 | Soil repairing agent used for fixing heavy metal element in polluted soil, preparation method and application thereof |
-
2016
- 2016-08-30 CN CN201610773209.0A patent/CN106433668A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102598911A (en) * | 2012-03-29 | 2012-07-25 | 常熟市佳盛农业科技发展有限公司 | Method for remedying heavy metal polluted mining soil |
| CN103933696A (en) * | 2014-03-19 | 2014-07-23 | 上海鼓华生态科技有限公司 | Curing agent for curing and stabilization of poisonous and harmful solid waste |
| CN104311235A (en) * | 2014-09-26 | 2015-01-28 | 赵刚 | Special slow release composite fertilizer for red jujubes and preparation method of special slow release composite fertilizer |
| CN104403675A (en) * | 2014-09-28 | 2015-03-11 | 上海化工研究院 | Soil repairing agent used for fixing heavy metal element in polluted soil, preparation method and application thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903132A (en) * | 2017-03-09 | 2017-06-30 | 西北农林科技大学 | A kind of method of stable environment medium cationic heavy metal contaminants |
| CN106903132B (en) * | 2017-03-09 | 2019-08-02 | 西北农林科技大学 | A kind of method of cationic heavy metal contaminants in stable environment medium |
| CN108672482A (en) * | 2018-04-20 | 2018-10-19 | 南安市创培电子科技有限公司 | One heavy metal species fixative and heavy-metal contaminated soil curing |
| CN111073658A (en) * | 2019-11-21 | 2020-04-28 | 河北建设集团安装工程有限公司 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
| CN110982535A (en) * | 2019-12-19 | 2020-04-10 | 江苏华东新能源勘探有限公司（江苏省有色金属华东地质勘查局八一三队） | Biomass charcoal soil heavy metal restoration agent and application method thereof |
| CN113293003A (en) * | 2021-04-17 | 2021-08-24 | 江西源春环保科技有限公司 | Method for restoring mine polluted soil |
| CN114989832A (en) * | 2022-05-13 | 2022-09-02 | 华侨大学 | CSGP reagent for repairing beach polluted soil and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106433668A (en) | Heavy metal pollution soil restoration agent and use method thereof | |
| Li et al. | A review on the applications of coal combustion products in China | |
| Zeng et al. | Progress on the industrial applications of red mud with a focus on China | |
| CN105294142B (en) | A kind of red mud base sintering light-weight aggregate and preparation method thereof | |
| CN104193202B (en) | A kind of high-moisture-retention cement | |
| CN111847924A (en) | Tailing-based cementing material and preparation method thereof | |
| CN103664108B (en) | Novel environment-friendly building brick and preparation method | |
| CN113735475B (en) | Light ceramsite and preparation method thereof | |
| CN110653247B (en) | Soil phosphorus condition improvement method based on red mud-based composite solid waste material recycling | |
| CN106915936A (en) | A kind of muck soil composite curing agent and application | |
| CN105060786B (en) | A kind of feldspar waste material concrete and preparation method thereof | |
| CN108672482A (en) | One heavy metal species fixative and heavy-metal contaminated soil curing | |
| CN105669157A (en) | Preparation method of copper mine tailing haydite for landscaping | |
| CN105016643B (en) | A kind of new miberal powder of utilization sludge production and preparation method thereof | |
| CN106630700A (en) | Inorganic gelling material made from coal ash and waste glass and preparation method of inorganic gelling material | |
| CN108203271A (en) | Baking-free and steaming-free brick prepared by treating sludge with lead-zinc smelting wastewater and preparation method thereof | |
| CN104072069B (en) | It is a kind of that with coal gangue and red mud, to be major ingredient non-burning brick and preparation method thereof | |
| CN105837163B (en) | A kind of preparation method of chambersite tailing Ceramic Tiles | |
| Fan et al. | New applications of municipal solid waste incineration bottom ash (MSWIBA) and calcined clay in construction: Preparation and use of an eco-friendly artificial aggregate | |
| CN108328950A (en) | A kind of red mud cooperates with the method that other solid wastes prepare ferrous aluminate cement | |
| CN103864404A (en) | Ceramsite made from quartz sand tailings and sludge and preparation method of ceramsite | |
| CN105130221A (en) | Method for comprehensively utilizing waste concrete and sludge to produce ecologic clinker | |
| CN101412595A (en) | Method for preparing concrete admixture from kaoline tailing | |
| Xie et al. | Characterization of red mud and fly ash based for co-curing of Cu2+-contaminated soil | |
| CN113800941B (en) | Method for preparing ceramsite by utilizing chromium-contaminated soil and ceramsite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |