CN110003917A - Soil complex repairation agent and its preparation method and application - Google Patents
Soil complex repairation agent and its preparation method and application Download PDFInfo
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- CN110003917A CN110003917A CN201910307436.8A CN201910307436A CN110003917A CN 110003917 A CN110003917 A CN 110003917A CN 201910307436 A CN201910307436 A CN 201910307436A CN 110003917 A CN110003917 A CN 110003917A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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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
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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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Abstract
The present invention relates to a kind of soil complex repairation agent and its preparation method and application.The soil complex repairation agent, in percentage by weight, comprising: chitose-acrylic amide compound stabilizer 10%-50%, active carbon-sodium alginate compound adsorbent 10%-50%；Wherein, the chitose-acrylic amide compound stabilizer is by the way that acrylamide solution to be added drop-wise in chitosan solution and stir, freeze-drying is made later, the active carbon-sodium alginate compound adsorbent is placed in water stirring to sodium alginate by sodium alginate and active carbon and dissolves, ageing obtains ageing liquid after mixing, and the ageing drop is added to CaCl2It is made in solution.Soil complex repairation agent proposed by the present invention has a good suction-operated to metal ion, and can the heavy metal in preferable stable soil realize the reparation to soil.In addition, the invention also provides the preparation method and application of above-mentioned soil complex repairation agent.
Description
Technical field
The present invention relates to environmental protection and materials science field more particularly to a kind of soil complex repairation agent and its preparation sides
Method and application.
Background technique
The total point exceeding standard rate of national soil is 16.1%, and wherein light contamination point ratio is 11.2%, slight pollution
Point ratio is 2.3%, intermediate pollution point ratio is 1.5%, serious pollution point ratio is 1.1%.Heavy metal-polluted soil is dirty
Dye not only influences the clean manufacturing of crops, and finally can cause greatly to threaten to human health by food chain, because of it
Have the characteristics that cumulative bad is strong, it is long to endanger the period, it is difficult to administer.
Remediation of heavy metal-contaminated soil mainly has peripheral doses, chemical remediation, biological prosthetic and agricultural regulation technology
Deng.Stabilization technology is widely used as one of chemical remediation technology by its simple, fast and efficient advantage.
Stabilization technology is that stabilizer is added into contaminated soil, is adequately mixed, it is made to react with pollution medium, pollutant,
By contaminated soil sealing it is the solidified body with low-permeability of structural integrity, or pollutant is converted to chemical property torpescence
Form, minimize Leaching, dissolubility and the migration of pollutant in the environment, and ensure the machinery of reaction product
Stability.
Contaminated soil is not single heavy metal pollution, is often associated with other different degrees of heavy metal pollutions, such as antimony
Factory waste residue is smelted in addition to major pollutants antimony, is also associated with the heavy metal contaminants such as arsenic, lead.Different soils renovation agent is to difference
Heavy metal has certain stabilization suction-operated, and various heavy combined contamination soil can not be solidified and be stablized, made by single renovation agent
Stabilization processes are carried out as inexorable trend to various heavy combined contamination soil with soil-repairing agent.
Summary of the invention
It is also not nearly enough for stabiliser research of the soil-repairing agent to various heavy both at home and abroad at present, in view of not of the same race
Class renovation agent is to the stablizing effect of heavy metal and the characteristic of different type renovation agent, it is necessary to develop new heavy metal-polluted soil and repair
Multiple agent is to achieve the purpose that improve various heavy comprehensive treatment efficiency while reduce cost.Therefore, heavy-metal contaminated soil is controlled
The research emphasis of reason renovation agent is that a kind of not only environmentally friendly, economic but also renovation agent easy to implement can be developed.
In consideration of it, the invention proposes a kind of soil complex repairation agent and its preparation method and application.
A kind of soil complex repairation agent, in percentage by weight, comprising: chitose-acrylic amide compound stabilizer
10%-50%, active carbon-sodium alginate compound adsorbent 10%-50%；Wherein, the chitose-acrylic amide stable composition
Agent is by the way that acrylamide solution to be added drop-wise in chitosan solution and stir, and freeze-drying is made later, the active carbon-seaweed
Sour sodium compound adsorbent is placed in water stirring to sodium alginate by sodium alginate and active carbon and dissolves, and ageing obtains after mixing
It is aged liquid, the ageing drop is added into CaCl2It is made in solution.
Preferably, according to weight percent, the soil complex repairation agent further includes calcium hydroxide 0%-80%.
Preferably, the active carbon is modified activated carbon, and the modified activated carbon is 5%- through concentration by active carbon
10% NaOH solution, which is impregnated, to be made.
Preferably, the partial size in the calcium hydroxide≤200 mesh.
The present invention also proposes a kind of preparation method of soil complex repairation agent described above, comprising the following steps:
S1, acrylamide solution is added drop-wise in chitosan solution and is stirred, be freeze-dried chitosan-propylene is made later
Amide compound stabilizer；
S2, sodium alginate and modified activated carbon are placed in water to stirring to sodium alginate dissolution, are aged after mixing
To ageing liquid, the ageing drop is added into CaCl2Active carbon-sodium alginate compound adsorbent is made in solution；
S3, by chitose-acrylic amide compound stabilizer described in step S1, active carbon-alginic acid described in step S2
Sodium compound adsorbent, calcium hydroxide mix according to the ratio, add water and stir and are tuned into paste, obtain the mixture of three；
S4, dry by mixture that step S3 is obtained and ball milling obtains the soil complex repairation agent.
It preferably, in step sl, is 2~4:1 by the acrylamide according to the mass ratio of chitosan and acrylamide
Solution is added drop-wise in the chitosan solution.
Preferably, in step s3, described to add water and stir before being tuned into paste further include: according to weight percent, to be added
The calcium hydroxide of 0-80%.
Preferably, in step s 2, the sodium alginate is placed in water according to parts by weight 1:5~8 with the modified activated carbon
Middle stirring.
Preferably, in step s 2, the time of the ageing is 12~15h.
Preferably, in step s 4, the mixture is dried to 2~4h at 100-120 DEG C, later by the institute after drying
It states mixture and is milled to partial size≤200 mesh and obtain the soil complex repairation agent.
In addition, the invention also provides a kind of application in rehabilitating soil of soil complex repairation agent described above,
Weight according to soil complex repairation agent is the 2%-10% of contaminated soil weight by the soil complex repairation agent and the dirt
Contaminate soil blending.
The beneficial effect of the present invention compared with the prior art includes: chitose-acrylic amide compound stabilizer by by third
Acrylamide solution is added drop-wise in chitosan solution and stirs, and is freeze-dried chitose-acrylic amide compound stabilizer is made later
It is, using acrylamide as grafted monomers, to prepare chitose-acrylic amide compound stabilizer by being crosslinked using chitosan as matrix,
It can change the reticular structure that the original linear structure of chitosan is crosslinking, make it insoluble in acid medium.Crosslinked action due to
Occur after crosslinking, to improve the mechanical property of chitosan in amino, polyhydroxylated molecule active site, therefore synthesizes one kind both
There is preferable mechanical strength to enhance the solidification to heavy metal ion, while also having the metal ion of good absorption property
Adsorbent, active carbon-sodium alginate compound adsorbent is by being placed in water stirring to seaweed for sodium alginate and modified activated carbon
Sour sodium dissolution, ageing obtains ageing liquid after mixing, and the ageing drop is added to CaCl2It is made, gives full play in solution
The synergistic effect of functional group (COO-) is enriched on active carbon and sodium alginate surface, can be used for adsorbing positively charged heavy metal from
Son, such as Cu2+、Ni2+、Zn2+、Pb2+、Cd2+Deng the chitose-acrylic amide compound stabilizer and 10%-50% of 10%-50%
The cooperation of active carbon-sodium alginate compound adsorbent further enhance the agent of soil complex repairation the absorption of metal ion made
With absorption property greatly improved, realize reparation to soil so as to the heavy metal in preferable stable soil.
The calcium hydroxide of 0%-80% can be improved soil pH, and the heavy metal in soil is promoted to form hydroxide or combination
State precipitating or co-precipitation；And Ca2+There is antagonism to lead, cadmium etc., can inhibit the heavy metal pollutions such as lead, cadmium and be absorbed by plants,
Heavy metal in soil is passivated to realize.
In addition, NaOH has certain etching action to active carbon during active carbon alkali process, lead to active carbon skeleton
Structure changes, the duct of internal not intercommunication originally is got through to form micropore caused by, micropore specific area and micropore pore volume
It increased, heavy metal adsorption area increased, adsorption capacity enhancing, the modified activated carbon specific surface area by alkali process can
15-20 times is improved, absorption property greatly improved, further improve and sodium alginate surface functional group abundant (COO-)
Synergistic effect.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below to specific reality of the invention
The mode of applying is described in detail.In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.But
The invention can be embodied in many other ways as described herein, and those skilled in the art can be without prejudice to this hair
Similar improvement is done in the case where bright intension, therefore the present invention is not limited to the specific embodiments disclosed below.
In following embodiment 1-3, chitose-acrylic amide compound stabilizer and active carbon-sodium alginate composite adsorption
Agent is prepared by the following method respectively:
It prepares chitose-acrylic amide compound stabilizer: chitosan 5g being added in 4% acetic acid solution (100mL), stirs
30min is mixed, acrylamide is configured to 4% aqueous solution, the aqueous solution of acrylamide is added drop-wise to the acetic acid solution of chitosan
In, and be 2~4:1 addition according to the mass ratio of chitosan and acrylamide, 1h is stirred at room temperature, hydrogel, freeze-drying is made
Afterwards, powder is ground to obtain, is washed with water, is dried in vacuo at 100 DEG C for 24 hours, chitose-acrylic amide compound stabilizer is obtained.
Prepare active carbon-sodium alginate compound adsorbent: by the modification of the sodium alginate powder of 2 parts by weight and 10 parts by weight
Active carbon is placed in stirring to sodium alginate in the deionized water of 200 parts by weight and dissolves, and is aged 12h after mixing, is aged
Liquid；Ageing drop is added to the CaCl of 500 parts by weight2Curing process 2h in solution is washed with water, at 100 DEG C after being granulated balling-up
Vacuum drying for 24 hours, obtains active carbon-sodium alginate compound adsorbent.
Embodiment 1
Collecting soil sample is tested from Hengyang, Hunan Province smeltery periphery farmland, is higher than " soil through arsenic, lead in detection soil
Environmental quality farming land soil pollution risk management and control standard (tentative) " 5.5 pH≤6.5 < (GB15618-2018) standard, arsenic,
Lead, antimony are according to " People's Republic of China's state environment protecting standard (HJ557-2010): Leaching leaching method horizontal oscillations
Method " leaching concentration exceed " Groundwater Environmental Quality standard " (GB/T14848-2017) IV class quality standard, concrete condition such as table 1
It is shown.
The 1 exceeded content of beary metal of Hengyang, Hunan Province smeltery periphery agricultural land soil of table
The soil complex repairation agent of the present embodiment, according to weight percent, comprising:
Chitose-acrylic amide compound stabilizer 40%；
Active carbon-sodium alginate compound adsorbent 30%；
Calcium hydroxide 30%.
The preparation method of above-mentioned soil complex repairation agent, comprising the following steps:
(1) chitose-acrylic amide compound stabilizer, active carbon-sodium alginate compound adsorbent, calcium hydroxide, by than
Example is sufficiently stirred, and adds deionized water to be tuned into paste, is allowed to sufficiently infiltrate, obtains three's mixture.
(2) it is dry to dry 2h at 100 DEG C for mixture.
(3) mixture pours into dry ball, carries out mixing and ball milling, and partial size≤200 mesh are after ball milling to get to for controlling
Manage the soil complex repairation agent of heavy metal pollution.
The present embodiment further includes that Hengyang, Hunan Province smeltery periphery agricultural land soil is being administered in the soil complex repairation agent
Using, comprising the following steps:
(1) arsenic pollution soil sample 10kg is taken, is mixed by the 6% of the weight that the weight of soil complex repairation agent is contaminated soil
It is mixed.Soil complex repairation agent 0.6kg described in embodiment 1 is added, is uniformly layered on pollution soil sample surface to be processed；
(2) pollution soil sample to be processed is uniformly mixed with stabilizer, forms mixed soil；
(3) add water in mixed soil, make soil moisture content not less than 30%, and keep water with plastic film mulching soil
Point；
(4) soil moisture content 20%-30% maintenance a period of time is maintained to take soil sample by professional standard after maintenance 7 days,
It is air-dried under natural conditions, carries out Leaching Heavy Metals detection, testing result is shown in Table 2, it is known that maintenance 7 days is leached dense in soil
Degree meets " Groundwater Environmental Quality standard " (GB/T14848-2017) IV class quality standard, by soil described in the present embodiment
The heavy metal contaminants discharge amount such as arsenic, antimony and lead significantly reduces in complex repairation agent treated smeltery periphery agricultural land soil,
It is greatly improved region environment.
2 Hengyang, Hunan Province smeltery periphery agricultural land soil regulation effect situation of table
Embodiment 2
It tests collecting soil sample to plough from Chenzhou, Hunan Province dressing plant periphery, is higher than " soil through detection mercury in soils, lead
Environmental quality farming land soil pollution risk management and control standard (tentative) " 5.5 pH≤6.5 < (GB15618-2018) screening value mark
Standard, mercury, lead leaching concentration exceed " Groundwater Environmental Quality standard " (GB/T14848-2017) IV class quality standard, concrete condition
As shown in table 3.
The 3 exceeded content of beary metal of Chenzhou, Hunan Province dressing plant periphery arable soil of table
The soil complex repairation agent of the present embodiment, according to weight percent, comprising:
Chitose-acrylic amide compound stabilizer 30%；
Active carbon-sodium alginate compound adsorbent 20%；
Calcium hydroxide 50%.
The preparation method of above-mentioned soil complex repairation agent, comprising the following steps:
(1) chitose-acrylic amide compound stabilizer, active carbon-sodium alginate compound adsorbent, calcium hydroxide, by than
Example is sufficiently stirred, and adds deionized water to be tuned into paste, is allowed to sufficiently infiltrate, obtains three's mixture.
(2) it is dry to dry 2h at 100 DEG C for mixture.
(3) mixture pours into dry ball, carries out mixing and ball milling, and partial size≤200 mesh are after ball milling to get to for controlling
Manage the agent of heavy-metal contaminated soil complex repairation.
The present embodiment further includes that Chenzhou, Hunan Province dressing plant periphery arable soil is being administered in the soil complex repairation agent
Using steps are as follows:
(1) arsenic pollution soil sample 10kg is taken, by the weight mixing proportion 4% of the agent of soil complex repairation and contaminated soil.It is added
Soil complex repairation agent 0.4kg described in embodiment 1 is uniformly layered on pollution soil sample surface to be processed；
(2) pollution soil sample to be processed is uniformly mixed with stabilizer, forms mixed soil；
(3) add water in mixed soil, make soil moisture content not less than 30%, and keep water with plastic film mulching soil
Point；
(4) soil moisture content 20%-30% maintenance a period of time is maintained to take soil sample by professional standard after maintenance 7 days,
It is air-dried under natural conditions, carries out Leaching Heavy Metals detection, testing result is shown in Table 4, it is known that maintenance 7 days, mercury in soils, lead leaching
Concentration meets " Groundwater Environmental Quality standard " (GB/T14848-2017) IV class quality standard out, by described in the present embodiment
The heavy metal contaminants discharge amount such as mercury and lead significantly reduces in soil complex repairation agent treated dressing plant periphery arable soil,
It is greatly improved region environment.
4 Chenzhou, Hunan Province dressing plant periphery arable soil regulation effect situation of table
Embodiment 3
Collecting soil sample is tested from a certain regional soil in Hunan chromium salt factory place, is higher than through chromium, arsenic in detection soil
5.5 pH≤6.5 < " soil environment quality construction land soil pollution risk management and control standard (tentative) " (GB36600-2018)
Screening value standard, chromium, arsenic leaching concentration exceed " Groundwater Environmental Quality standard " (GB/T14848-2017) IV class quality standard,
Concrete condition is as shown in table 5.
The 5 exceeded content of beary metal of a certain regional soil in Changsha chromium salt factory place of table
The soil complex repairation agent of the present embodiment, according to weight percent, comprising:
Chitose-acrylic amide compound stabilizer 60%；
Active carbon-sodium alginate compound adsorbent 40%.
The preparation method of above-mentioned soil complex repairation agent, comprising the following steps:
(1) chitose-acrylic amide compound stabilizer, active carbon-sodium alginate compound adsorbent, is sufficiently stirred in proportion
It mixes, deionized water is added to be tuned into paste, be allowed to sufficiently infiltrate, obtain mixture.
(2) it is dry to dry 2h at 100 DEG C for mixture.
(3) mixture pours into dry ball, carries out mixing and ball milling, and partial size is arrived no more than 200 mesh and used after ball milling
In the soil complex repairation agent for administering heavy metal pollution.
The present embodiment further includes that a certain regional soil in Changsha chromium salt factory place is being administered in the agent of soil complex repairation
Using, comprising the following steps:
(1) arsenic pollution soil sample 10kg is taken, account for the weight of contaminated soil by the weight of soil complex repairation agent 7% is mixed
It is mixed, soil complex repairation agent 0.7kg described in embodiment 1 is added, is uniformly layered on pollution soil sample surface to be processed；
(2) pollution soil sample to be processed is uniformly mixed with stabilizer, forms mixed soil；
(3) add water in mixed soil, make soil moisture content not less than 30%, and keep water with plastic film mulching soil
Point；
(4) soil moisture content 20%-30% maintenance a period of time is maintained to take soil sample by professional standard after maintenance 7 days,
It is air-dried under natural conditions, carries out Leaching Heavy Metals detection, testing result is shown in Table 6, it is known that maintenance 7 days, chromium, arsenic leaching in soil
Concentration meets " Groundwater Environmental Quality standard " (GB/T14848-2017) IV class quality standard out, by the present embodiment
The heavy metal contaminants discharge amount such as chromium and arsenic significantly reduces in soil complex repairation agent treated chromium salt factory place soil, makes area
Domain ecological environment is greatly improved.
The 6 a certain regional soil regulation effect situation in Changsha chromium salt factory place of table
Comparative example 1
The soil-repairing agent of this comparative example directlys adopt mixed raw material as soil remediation according to the preparation method of embodiment 1
Agent, raw material are made without chitose-acrylic amide crosslinked action, the compound collaboration of activated carbon modified and active carbon-sodium alginate
With the soil-repairing agent, according to weight percent, comprising:
Chitosan 30%；
Acrylamide 10%；
Unmodified active carbon 25%；
Sodium alginate 5%；
Calcium hydroxide 30%.
Soil-repairing agent in the comparative example also uses the Hengyang, Hunan Province smeltery periphery agricultural land soil in embodiment 1
Identical method is administered, and the results are shown in Table 7.
7 Hengyang, Hunan Province smeltery periphery agricultural land soil regulation effect situation of table
As can be seen from Table 7, Sb, As leaching concentration are more than " Groundwater Environmental Quality standard " (GB/ in soil
T14848-2017) IV class quality standard, heavy metal-polluted soil coefficient of stabilization is significantly lower than the soil complex repairation agent pair in embodiment 1
The coefficient of stabilization of heavy metal-polluted soil, soil remediation effect are poor.
Soil complex repairation agent in present embodiment can be directed to arsenic, antimony, lead, cadmium, chromium, the one or more huge sum of moneys of mercury
Belong to the repairing and treating of contaminated soil, heavy metal ion easy to migrate can be stabilized and shape by the modes such as adsorbing, precipitating
At the compound that indissoluble difficulty migrates, and keep preferable stability.Prepare soil complex repairation agent raw material sources extensively, valence
Lattice are cheap, and easy to operate, quick and effect is good when medicament uses.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Each technical characteristic of embodiment described above can carry out arbitrarily
Combination, for simplicity of description, it is not all possible to each technical characteristic in above-described embodiment combination be all described, so
And as long as there is no contradiction in the combination of these technical features, it all should be considered as described in this specification.
Claims (10)
1. a kind of soil complex repairation agent, which is characterized in that in percentage by weight, comprising: chitose-acrylic amide is compound
Stabilizer 10%-50%, active carbon-sodium alginate compound adsorbent 10%-50%；Wherein, the chitose-acrylic amide is multiple
Stabilizer is closed by the way that acrylamide solution to be added drop-wise in chitosan solution and stir, freeze-drying is made later, the activity
Charcoal-sodium alginate compound adsorbent is placed in water stirring to sodium alginate by sodium alginate and active carbon and dissolves, after mixing
Ageing obtains ageing liquid, and the ageing drop is added to CaCl2It is made in solution.
2. soil complex repairation agent according to claim 1, which is characterized in that according to weight percent, the soil is multiple
Closing renovation agent further includes calcium hydroxide 0%-80%.
3. soil complex repairation agent according to claim 1, which is characterized in that the active carbon is modified activated carbon, institute
It states modified activated carbon and is made by active carbon through the NaOH solution immersion that concentration is 5%-10%.
4. a kind of preparation method of the described in any item soil complex repairation agent of claim 1-3, which is characterized in that including following
Step:
S1, acrylamide solution is added drop-wise in chitosan solution and is stirred, be freeze-dried chitose-acrylic amide is made later
Compound stabilizer；
S2, sodium alginate and modified activated carbon are placed in water to stirring to sodium alginate dissolution, ageing obtains old after mixing
Change liquid, the ageing drop is added into CaCl2Active carbon-sodium alginate compound adsorbent is made in solution；
S3, by chitose-acrylic amide compound stabilizer described in step S1, active carbon-sodium alginate described in step S2 is multiple
It closes adsorbent to mix according to the ratio, adds water and stirs and be tuned into paste, obtain mixture；
S4, dry by mixture that step S3 is obtained and ball milling obtains the soil complex repairation agent.
5. the preparation method of soil complex repairation agent according to claim 4, which is characterized in that in step s3, described
It adds water and stirs before being tuned into paste further include: according to weight percent, the calcium hydroxide of 0-80% is added.
6. the preparation method of soil complex repairation agent according to claim 4, which is characterized in that in step sl, according to
The mass ratio of chitosan and acrylamide is that the acrylamide solution is added drop-wise in the chitosan solution by 2~4:1.
7. the preparation method of soil complex repairation agent according to claim 4, which is characterized in that in step s 2, described
Sodium alginate is placed in water stirring according to parts by weight 1:5~8 with the modified activated carbon.
8. the preparation method of soil complex repairation agent according to claim 4, which is characterized in that in step s 2, described
The time of ageing is 12~15h.
9. the preparation method of soil complex repairation agent according to claim 4, which is characterized in that in step s 4, by institute
Mixture dry 2~4h at 100-120 DEG C is stated, the mixture after drying is milled to partial size≤200 mesh later and is obtained
The soil complex repairation agent.
10. a kind of application of described in any item soil complex repairation agent of claim 1-3 in rehabilitating soil, feature exist
In, according to soil complex repairation agent weight be contaminated soil weight 2%-10% by the soil complex repairation agent with it is described
Contaminated soil blending.
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| CN111135800A (en) * | 2020-01-10 | 2020-05-12 | 景德镇一牧堂陶瓷科技有限公司 | Biochar material for efficiently reducing arsenic pollution of soil and preparation method thereof |
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| CN113773849A (en) * | 2021-09-23 | 2021-12-10 | 湖南国重环境科技有限责任公司 | Slow-release heavy metal fixing agent, preparation method thereof and application thereof in remediation of heavy metal contaminated farmland soil |
| CN114591747A (en) * | 2022-02-28 | 2022-06-07 | 中国科学院南京土壤研究所 | Surface functional group amplification biomass charcoal and preparation method and application thereof |
| CN115193398A (en) * | 2022-05-16 | 2022-10-18 | 王之风 | Modified coconut shell carbon gel ball for adsorbing heavy metal ions |
| CN115502195A (en) * | 2022-09-16 | 2022-12-23 | 浙江乾精新材料科技有限责任公司 | Method for quickly restoring saline-alkali soil |
| CN115502195B (en) * | 2022-09-16 | 2024-01-09 | 浙江乾精新材料科技有限责任公司 | Quick restoration method for saline-alkali soil |
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Application publication date: 20190712 |