CN110038890B - A kind of ecological, environmental protective soil remediation method - Google Patents
A kind of ecological, environmental protective soil remediation method Download PDFInfo
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- CN110038890B CN110038890B CN201910403613.2A CN201910403613A CN110038890B CN 110038890 B CN110038890 B CN 110038890B CN 201910403613 A CN201910403613 A CN 201910403613A CN 110038890 B CN110038890 B CN 110038890B
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- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 claims abstract description 61
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 58
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 48
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- 239000011707 mineral Substances 0.000 description 2
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- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
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- 241000282412 Homo Species 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The present invention relates to a kind of ecological, environmental protective soil remediation methods, include the following steps: the surface that soil-repairing agent is uniformly sprinkling upon to heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil uniformly, balances 6-8 days completion heavy metal-polluted soil repair processes.In parts by weight, soil-repairing agent is by being modified 55-65 parts of hectorite, and 20-30 parts of organic fertilizer, 10-20 parts of humic acid and 1~3 part of microbial bacterial agent mix.The soil remediation method has at low cost, ecological, environmental protective, the advantages such as repairing efficiency is short, repairing effect is good, remediation efficiency is high suitable for repairing to heavy-metal contaminated soil.
Description
Technical field
The present invention relates to a kind of ecological, environmental protective soil remediation methods.
Background technique
Basis with soil as nature and Agro-ecological System, since the industrial revolution, toxic metals in biosphere
Pollution content sharply increases.Heavy metal pollution of soil refers to that mankind's activity brings heavy metal substance into soil, causes weight in soil
The phenomenon that tenor is apparently higher than its natural background content, and the ecosystem is destroyed, and environmental quality deteriorates.A huge sum of money in soil
The source of category is divided into two kinds of natural source and artificial source, and wherein human factor accounts for major part.In natural source, huge sum of money owner
Will be from the weathering of rock soil-forming process, content is usually lower, to environment and animals and plants be do not have it is virose.By people
It is influenced for factor, one or more heavy metals build up increase in soil, and are more than its Natural Background Values, when its content height arrives
When to a certain degree, the mankind, animals and plants and entire ecology erroneous zone will all be on the hazard.The mankind are to the Nature heavy metal pollution
Historical origin for a long time, the heavy metal element that combustion of wood is discharged is deposited on earth's surface, gradually changes local soil environment.It is ancient
After generation mining and smelting are risen, the relationship of " mankind-heavy metal-pollution " is just formd.Hong's etc. research shows that ancient Roman
Epoch mining and smelting have had resulted in pollution.After the industrial revolution, with industrialization, the fast development of urbanization, a soil huge sum of money
Belong to pollution it is also more serious, and present from industry to agricultural, city to rural area, put to face pollution development trend, pollution form
Also by building up the stage into sudden, linksystem, regional outburst.20 middle of century are external heavy metal pollution of soil
The high-incidence season of event, national governments also start to pay attention to heavy metal pollution problem at this moment.In the 1990s, the U.S. is used for soil
About 100,000,000,000 dollars of the investment of reparation；Claim in European Union's soil protection keynote speeches in 2006, European 25 states are that soil pollution is special
Repairing and treating conservative estimation will pay 17,300,000,000 Euros/year.At present, the heavy metal pollution of soil situation of Countries obtains
Improve, but the local pollutions such as mining area, factory still have.According to statistics, there are about 13.7 ten thousand square kilometres of agricultural land huge sum of moneys in Europe
Belonging to content is more than critical value；About 6,000,000 square kilometres of U.S. palm fibre ground is by different degrees of heavy metal pollution.China is in the world
Maximum developing country, with economic development, soil environment problem is also on the rise." the whole nation announced on April 17th, 2014
Soil Pollution Investigation bulletin " display, the national total exceeding standard rate of soil is 16.1%, and cadmium, zinc, lead, copper exceeding standard rate are respectively
7%, 0.9%, 1.5% and 2.1%.
The human activities such as industry, mining industry, agricultural are the main reason for causing heavy metal-polluted soil.Human factor causes in soil
Sources of heavy metal may be summarized to be four kinds of approach.(1) atmospheric sedimentation.Atmospheric sedimentation is divided into natural subsidence and the two kinds of sides of sedimentation that drench with rain
Formula, in addition to Hg, other heavy metals substantially enter atmosphere in the form of aerosol, by settling into soil.Industry
The exhaust gas of enterprise's production, motor vehicle exhaust emission, oil exploitation and processing mainly passes through atmospheric sedimentation form and enters in soil.
Wherein Non Ferrous Mineral Industry picks up and smelts the main path that the sedimentation of exhaust gas containing heavy metal discharged is heavy metal pollution.It grinds
Study carefully and shows that there are about 0.2~0.9kg/km every year2Heavy metal Cd through atmospheric sedimentation into soil, the heavy metals such as Zn, Hg, Cr, Pb
Also a large amount of discharges therewith, enter eventually into soil.Farmland near the multiple metal mines in Jiangxi and smeltery is studied
It investigates, it has been more than 50 times of China's standard of soil environment quality secondary standard that Cd content, which reaches 29.77mg/kg, in this area's soil.
(2) solid waste is accumulated.With the development of urbanization, China city solid waste, house refuse discharge amount increase year by year at present.
Heavy metal pollution of soil has become an important global environmental problem.It is estimated that under temperate climate, Cd
The residence time is 75~380 years in the soil, and Hg is 500~1000 years, and Ag, Cu, Ni, Pb, Se, Zn etc. are 1000~3000
Year.Once contaminated, heavy metal can not only be accumulated for a long time in the soil soil, can also be transferred in other surrounding mediums, draw
Play the secondary pollution of atmosphere and water body.Excessively high content of beary metal will affect the yield and quality of crops in soil, and pass through
It is healthy that food chain or the directly number of ways such as contact endanger animals and humans.Under normal circumstances, into the Cu of animal and human body,
The heavy metal elements such as Zn, Mn are not easy to cause damages to organism, but working as its content is more than certain limit, will generate toxicity；And
Most of heavy metal (such as Hg, Cd, Pb, As) has specific toxic action, therefore should strictly control to organism and nonessential
It is made into food chain.Heavy metal into human body is most of with original skilful formula presence, it is also possible to be converted into organism poison
The stronger compound of property.When they enter in adipose tissue or are deposited in the circulatory system, Bian Buyi is discharged, thus to human body
Cause acute or chronic injury.For example, cadmium is exceeded to will lead to the lesions such as injury of kidney, osteoporosis, cancer, manganese is exceeded may
Cause the symptom of similar parkinsonism, lead doping can then recycle blood, nervous centralis, reproductive system, immune system, kidney etc.
System and organ cause to damage.
Cadmium is heavy metal element more rare in soil, and earth's crust average content is 0.5mg/kg.In nature, cadmium is main
It is to be present in the non-ferrous metals mineral reserve such as copper, lead, zinc with sulphided form.Cadmium background value in China's topsoil is 0.017
~0.333mg/Kg, but cadmium can be brought into soil by the various production and living behaviors of the mankind, and the characteristics of cadmium migration is to be not easy to be given birth to
It is discharged after object decomposition and inversion, and is not easy up accumulate along food chain with water movement, so that organism health is endangered, it is right
Normal function and metabolic balance have an impact.The main source of heavy metal in soil cadmium pollution is mining industry, plating and chemical industry
Waste water, waste residue, exhaust gas, chemical fertilizer containing cadmium, pesticide used in agricultural production are also the important sources of cadmium.According to National Environmental general bureau
Statistics, China farmland cadmium pollution area just reached 280,000 square kilometres, up to 1,500,000 tons of the exceeded agricultural product of cadmium in 2003.
In-situ passivation be it is a kind of modifying agent is put into soil, change heavy metal existing forms in the soil to reach,
Metal ion in soil or solution is passivated, a kind of form of its utilization rate is reduced.Each modifying agent is for a huge sum of money
The passivation effect of category is different, and the mechanism of action is not also identical, and therefore, during actual soil remediation, adaptation to local conditions, selection is closed
Suitable modifying agent is best in the hope of achieving the effect that.Currently, common modifying agent mainly has lime, calcium carbonate, phosphate in the market
Deng.There is preferable improved effect to metals such as Cd, Cu, Zn.
Chinese granted patent CN105838382B discloses a kind of efficiently drop cadmium soil-repairing agent and its application, with parts by weight
Meter, soil-repairing agent is by being modified 40~60 parts of hectorite, and 20~30 parts of organic fertilizer, 5~38 parts of humic acid and microbial bacterial agent 1
~5 parts mix, then modified hectorite is added calcium polysulfide and is stirred to react, finally grind by calcining hectorite
It wears into particle or powdered obtains.The soil-repairing agent is suitable for repairing cadmium pollution soil, then after repair
Grown on soil rice, have it is at low cost, repairing efficiency is short, drop cadmium effect it is good, the clear superiorities such as rice yield height.
However, the available state concentration of Cadmium in Soil is still bigger than normal after the processing of above-mentioned patent, it is difficult to meet to heavy metal-polluted soil
The high quality requirement of content, can not also further decrease content of beary metal in crops.
Summary of the invention
Available state concentration in order to solve the Cadmium in Soil after soil-repairing agent is handled in the prior art is still bigger than normal, it is full to be difficult to
The technical issues of foot wants high quality soil, the invention proposes following technical solutions:
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 6-8 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 55-65 parts of hectorite, and 20-30 parts of organic fertilizer, humic acid 10-
20 parts and 1~3 part of microbial bacterial agent mix, and the modified hectorite is prepared via a method which to obtain: by hectorite
Calcined, then be added mixed modifier be stirred to react, while stirring carry out microwave irradiation processing, be finally ground into particle or
Powdered, described be stirred to react carries out at 280~320 DEG C of temperature, and the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and changes
Property agent I be in mass ratio that 2:1 is constituted, the structural formula of the modifying agent I is as follows:
Every gram of viable count of the microbial bacterial agent is 1.5~2.5 hundred million.
Preferably, the microwave irradiation power is 750~850W, it is highly preferred that the microwave irradiation power is 800W.
Preferably, the organic fertilizer is chicken manure, pig manure or cow dung.
Preferably, the microbial bacterial agent is bacillus.
Preferably, the partial size of modified hectorite is between 150 mesh~250 mesh.
Technical solution of the present invention has as follows by beneficial effect:
(1) modified effect can be greatly improved by being modified processing to hectorite using composite modifier, better than using single
Modified dose of modified effect, and then the heavy metals such as cadmium in soil are removed to greatest extent, removal efficiency is repaired better than existing soil
Multiple agent.Composite modifier can not only be such that the impurity inside hectorite duct is replaced, and space becomes larger, and improve the absorption to cadmium
And fixed function, composite modifier can also realize grafting and cross-linking reaction in hectorite microstructure, further increase water
The hydrophobic performance of pyroxene improves the ability of the heavy metal ion in absorption soil, widens the spacing of hectorite layer.
(2) on the basis of chemical modification, microwave modification used in parallel can be improved the modified effect of hectorite, and microwave changes
The mass transfer velocity of hectorite cellular internal is accelerated after property, and the influence of interior diffusion is lowered, and raising hectorite not only can be improved
Activity, while can also make composite modifier also can preferably into hectorite microstructure in.Importantly, by big
Amount experiment is it can be found that microwave irradiation power is not the bigger the better, and there are an optimized scope values, i.e., when microwave irradiation power
When within the scope of 750~850W, the effect of microwave modification is best, can remove the heavy metals such as cadmium in soil to greatest extent.In addition,
The use of microwave modification shortens the modification time of hectorite, improves production efficiency, reduces production cost.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments and comparative example,
The present invention will be described in further detail.
Embodiment 1
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 6 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 55 parts of hectorite, and 20 parts of organic fertilizer, 10 parts of humic acid and micro-
1 part of bacteria agent mixes, and the modified hectorite is prepared via a method which to obtain: hectorite being calcined, then
Mixed modifier is added to be stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powdered, it is described to stir
It mixes reaction to carry out at 280 DEG C of temperature, the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and changes
Property agent I be in mass ratio that 2:1 is constituted, the structural formula of the modifying agent I is as follows:
Wherein, the microwave irradiation power is 750W, and the organic fertilizer is chicken manure, and the microbial bacterial agent is gemma bar
Bacterium, the partial size of modified hectorite is between 150 mesh.
Embodiment 2
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 7 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 60 parts of hectorite, and 25 parts of organic fertilizer, 15 parts of humic acid and micro-
2 parts of bacteria agent mix, and the modified hectorite is prepared via a method which to obtain: hectorite being calcined, then
Mixed modifier is added to be stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powdered, it is described to stir
It mixes reaction to carry out at 300 DEG C of temperature, the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and changes
Property agent I be in mass ratio that 2:1 is constituted, the structural formula of the modifying agent I is as follows:
Wherein, the microwave irradiation power is 800W, and the organic fertilizer is pig manure, and the microbial bacterial agent is gemma bar
Bacterium, the partial size of modified hectorite is between 200 mesh.
Embodiment 3
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 8 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 65 parts of hectorite, and 30 parts of organic fertilizer, 20 parts of humic acid and micro-
3 parts of bacteria agent mix, and the modified hectorite is prepared via a method which to obtain: hectorite being calcined, then
Mixed modifier is added to be stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powdered, it is described to stir
It mixes reaction to carry out at 320 DEG C of temperature, the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and changes
Property agent I be in mass ratio that 2:1 is constituted, the structural formula of the modifying agent I is as follows:
Wherein, the microwave irradiation power is 850W, and the organic fertilizer is cow dung, and the microbial bacterial agent is gemma bar
Bacterium, the partial size of modified hectorite is between 250 mesh.
Comparative example 1
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 7 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 60 parts of hectorite, and 25 parts of organic fertilizer, 15 parts of humic acid and micro-
2 parts of bacteria agent mix, and the modified hectorite is prepared via a method which to obtain: hectorite being calcined, then
Mixed modifier is added to be stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powdered, it is described to stir
It mixes reaction to carry out at 300 DEG C of temperature, the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is only by modifying agent I structure
At the structural formula of the modifying agent I is as follows:
Wherein, the microwave irradiation power is 800W, and the organic fertilizer is pig manure, and the microbial bacterial agent is gemma bar
Bacterium, the partial size of modified hectorite is between 200 mesh.
Comparative example 2
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 7 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 60 parts of hectorite, and 25 parts of organic fertilizer, 15 parts of humic acid and micro-
2 parts of bacteria agent mix, and the modified hectorite is prepared via a method which to obtain: hectorite being calcined, then
Mixed modifier is added to be stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powdered, it is described to stir
It mixes reaction to carry out at 300 DEG C of temperature, the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and changes
Property agent I be in mass ratio that 2:1 is constituted, the structural formula of the modifying agent I is as follows:
Wherein, the microwave irradiation power is 600W, and the organic fertilizer is pig manure, and the microbial bacterial agent is gemma bar
Bacterium, the partial size of modified hectorite is between 200 mesh.
Comparative example 3
A kind of ecological, environmental protective soil remediation method, characterized by the following steps: be uniformly sprinkling upon soil-repairing agent
The surface of heavy-metal contaminated soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil
It is even, balance 7 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 60 parts of hectorite, and 25 parts of organic fertilizer, 15 parts of humic acid and micro-
2 parts of bacteria agent mix, and the modified hectorite is prepared via a method which to obtain: hectorite being calcined, then
Mixed modifier is added to be stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powdered, it is described to stir
It mixes reaction to carry out at 300 DEG C of temperature, the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and changes
Property agent I be in mass ratio that 2:1 is constituted, the structural formula of the modifying agent I is as follows:
Wherein, the microwave irradiation power is 1000W, and the organic fertilizer is pig manure, and the microbial bacterial agent is gemma bar
Bacterium, the partial size of modified hectorite is between 200 mesh.
Following table describes the composition of mixed modifier and the power of microwave irradiation in embodiment 2 and comparative example 1-3 in detail.
| Number | Mixed modifier | Microwave irradiation power |
| Embodiment 2 | Calcium polysulfide+modifying agent I | 800W |
| Comparative example 1 | Modifying agent I | 800W |
| Comparative example 2 | Calcium polysulfide+modifying agent I | 600W |
| Comparative example 3 | Calcium polysulfide+modifying agent I | 1000W |
Characterization result: soil-repairing agent in embodiment 2 and comparative example 1-3 is uniformly mixed and is sprinkling upon heavy metal cadmium soil
Surface, be per acre 150kg, then carry out Soil tillage, balance 7 days completion heavy metal-polluted soil repair processes.After reparation
Soil is tested, as a result as follows:
| Number | The available state concentration of untreated Cadmium in Soil | The available state concentration of Cadmium in Soil after processing |
| Embodiment 2 | 0.613ug/L | 0.059ug/L |
| Comparative example 1 | 0.613ug/L | 0.102ug/L |
| Comparative example 2 | 0.613ug/L | 0.086ug/L |
| Comparative example 3 | 0.613ug/L | 0.074ug/L |
The above results show: (1) can send out from embodiment and comparative example 1, the experimental result of prior art CN105838382B
It was found that modified effect can be greatly improved using composite modifier, better than the modified effect for using single modifying agent, and then can
Removing heavy metals, the composite modifier such as cadmium in soil to greatest extent can not only be such that the impurity inside hectorite duct is replaced
It changes, space becomes larger, and improves absorption and fixed function to cadmium, and composite modifier can also realize connecing in hectorite microstructure
Branch and cross-linking reaction further increase the hydrophobic performance of hectorite, improve the ability of the heavy metal ion in absorption soil, broadening
The spacing of hectorite layer.(2) it can be found from embodiment and the experimental result of comparative example 3-4, on the basis of chemical modification, and
Connection can be improved the modified effect of hectorite using microwave modification, and the mass transfer velocity of hectorite cellular internal is added after microwave modification
Fastly, the influence of interior diffusion is lowered, and the activity for improving hectorite not only can be improved, while composite modifier can also be made also
Preferably enter in the microstructure of hectorite.Importantly, passing through many experiments it can be found that microwave irradiation power is not got over
Big better, when microwave irradiation power is within the scope of 750~850W, the effect of microwave modification is best, can remove to greatest extent
The heavy metals such as cadmium in soil.
Claims (6)
1. a kind of ecological, environmental protective soil remediation method, characterized by the following steps: soil-repairing agent is uniformly sprinkling upon to weight
The surface of metallic pollution soil, then carrying out Soil tillage is sufficiently mixed soil-repairing agent and heavy-metal contaminated soil uniformly,
Balance 6-8 days completion heavy metal-polluted soil repair processes；
In parts by weight, the soil-repairing agent is by being modified 55-65 parts of hectorite, 20-30 parts of organic fertilizer, 10-20 parts of humic acid
And 1 ~ 3 part of microbial bacterial agent mix, the modified hectorite is prepared via a method which to obtain: hectorite is forged
It burns, mixed modifier is then added and is stirred to react, carries out microwave irradiation processing while stirring, is finally ground into particle or powder
Shape, described be stirred to react carry out at 280~320 DEG C of temperature, and the time is 1 hour；
The dosage of the mixed modifier accounts for the 10wt% of modified hectorite, and the mixed modifier is by calcium polysulfide and modifying agent I
It is constituted in mass ratio for 2:1, the structural formula of the modifying agent I is as follows:
；
Wherein, the power of the microwave irradiation is 750 ~ 850W.
2. ecological, environmental protective soil remediation method according to claim 1, it is characterised in that: the power of the microwave irradiation is
800W。
3. ecological, environmental protective soil remediation method according to claim 1, it is characterised in that: the organic fertilizer is chicken manure, pig
Excrement or cow dung.
4. ecological, environmental protective soil remediation method according to claim 1, it is characterised in that: the microbial bacterial agent is gemma
Bacillus.
5. ecological, environmental protective soil remediation method according to claim 1, it is characterised in that: the partial size of the modified hectorite
Between 150 mesh~250 mesh.
6. ecological, environmental protective soil remediation method according to claim 1, it is characterised in that: the viable bacteria of the microbial bacterial agent
Every gram of number is 1.5~2.5 hundred million.
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| CN111085536B (en) * | 2019-12-31 | 2021-08-03 | 杭州渗源环境科技有限公司 | Soil remediation process |
| CN111748351B (en) * | 2020-06-30 | 2021-10-29 | 盛世生态环境股份有限公司 | Conditioner for repairing heavy metal contaminated soil and preparation method and application thereof |
| CN115156280A (en) * | 2022-06-25 | 2022-10-11 | 河南省地质环境规划设计院有限公司 | Chromium-contaminated soil remediation process |
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