CN110014032A - A kind of restorative procedure of farmland soil heavy metals pollution - Google Patents
A kind of restorative procedure of farmland soil heavy metals pollution Download PDFInfo
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- CN110014032A CN110014032A CN201910351179.8A CN201910351179A CN110014032A CN 110014032 A CN110014032 A CN 110014032A CN 201910351179 A CN201910351179 A CN 201910351179A CN 110014032 A CN110014032 A CN 110014032A
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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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- 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
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
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Abstract
The invention belongs to soil protection technical fields, and in particular to a kind of restorative procedure of farmland soil heavy metals pollution.This method is uniformly mixed using heavy metal deactivator with soil, the first crops are planted after maintenance, then super enriching plant is planted, apply heavy metallic activation agent simultaneously, subsequently apply passivator, after planting the second crops, first applying heavy metal deactivator can be effectively reduced heavy metal risk of phosphate leaching loss, avoid heavy metal accumulation in crops simultaneously, heavy metallic activation agent is then applied again, plant super enriching plant, absorb heavy metal, reduce the content of heavy metal in soil, heavy metal in the non-coverage area of root system of plant in soil keeps low risk of phosphate leaching loss due to the presence of heavy metal deactivator.The problem of present invention not only can fundamentally remove removing heavy metals using the method for plants enriched technology and application heavy metal deactivator, but also processing can be passivated to heavy metal in long-term cropping, improve the service efficiency of soil.
Description
Technical field
The invention belongs to soil protection technical fields, and in particular to a kind of restorative procedure of farmland soil heavy metals pollution.
Background technique
Soil is important material base for the survival of mankind, but as industrialization, urbanization process are constantly deepened, weight
Metal discharge is continuously increased, and soil pollution is caused to get worse.National Soil Pollution Investigation is the results show that inorganic pollution
Exceeded digit accounts for the 82.8% of all exceeded digits, and causing the main matter of inorganic pollution is cadmium (7.0%), nickel
(4.8%), arsenic (2.7%), copper (2.1%), mercury (1.6%), lead (1.5%), chromium (1.1%) and zinc (0.9%), the whole world are flat
Annual 5000000 tons of lead of discharge, 3,400,000 tons of copper, 1.5 ten thousand tons of mercury, 15,000,000 tons of manganese, 1,000,000 tons of nickel, and pollute and still constantly adding
It is acute.The 19.4% of the total arable soil area of China heavy metals exceeding standard arable soil Zhan, the gross area are mostly more up to 25,000,000 hectares
Heavy metal species combined pollution, wherein slight, slight, moderate and serious pollution point ratio be respectively 13.7%, 2.8%,
1.8% and 1.1%, causing the direct economic losses such as the underproduction is more than 10,000,000,000 yuan, and is up to every year by the grain of heavy metal pollution
It 12000000 tons, is enriched with layer by layer through food chain, can be transferred in mankind's body, seriously affect human health.
Heavy metal-polluted soil is many kinds of, distinct, and the difficulty administered and restored is larger, it has also become global problem.
To realize sustainable development, improves human lives, be effectively removed heavy metal in soil and have become current very urgent appoint
Business.The restorative procedure of present heavy-metal contaminated soil mainly has engineering control reparation, physical chemistry reparation, chemical remediation, biology
It repairs；Wherein, the plant super enrichment technology in the solidification and stabilization technology and bioremediation technology in physical chemistry reparation is
The restorative procedure of excellent effect at home and abroad has successful case study on implementation, but two methods respectively have drawback, and mutual lance
Shield, solidification and stabilization technology can be by absorption heavy metal or change heavy metal compound structure, and then it is living to reduce its physical chemistry
Property, it is not easy to be absorbed by plant and microorganism, achievees the purpose that reduce its pollution risk, but heavy metal is not removed really,
There are still the risks of pollution environment；Plant super enrichment technology passes through harvesting by belonging to plant root with much money in Enriching soil
Plant achievees the purpose that removing heavy metals, but it requires heavy metal compound structure to be easy to be absorbed and used by plants, and plant
Growing state greatly influences removal effect.Common super enriching plant has vetiver, Pinnate Beggarticks and rough melic herb etc., but it
Be common crops, for removal heavy metal-polluted soil and large area plantation certainly will will affect normal farming operation, cause grain
Eat the underproduction.Therefore, finding neither influences farming operation can fundamentally go the recovery technique of removing heavy metals to be of great significance again.
The farmland soil heavy metals of a kind of coupling activation and passivation are disclosed in Chinese patent literature CN201310476035
Pollution amelioration method, this method include applying heavy metallic activation agent in the soil, and harvest is enriched the plant of heavy metal, so that agriculture
Heavy metal concentration in the soil of field reduces, and then plants and harvest the crops of content of beary metal safety compliance, makes farmland can be with
Coming into operation as early as possible, but this method first applies heavy metallic activation agent plantation super enriching plant, then applies heavy metal passivation
Agent, when planting super enriching plant, do not plant the heavy metal in the part soil of super enriching plant activity it is still higher, exist compared with
High risk of phosphate leaching loss, and passivator selected in the patent is mainly phosphate, organic fertilizer and metalliferous mineral, phosphate with again
It is chemically combined between metal, and combines the high stability of rear substance, be not easy to be activated again, make the heavy metal in soil
Content increases；Organic fertilizer and metalliferous mineral can secondary introducing heavy metal, while introducing a certain amount of sulfate radical, do not utilize and crop
Growth；In addition, in that patent, plants enriched technology occupies farmland, influences farming, the service efficiency of soil is reduced.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming in prior art restorative procedure that there are higher for heavy metal
The defects of risk of phosphate leaching loss, plantation enriching plant reduce soil service efficiency, to provide a kind of pollution of farmland soil heavy metals
Method for comprehensive repairing.
For this purpose, the present invention provides following technical schemes.
The present invention provides a kind of restorative procedures of farmland soil heavy metals pollution, include the following steps,
First heavy metal deactivator is uniformly mixed with Soil tillage 10-30cm before plantation crops, is conserved 12-17 days；
In stubble period in spring, the first crops are planted, after first crop harvesting, plants super enriching plant, apply simultaneously
With heavy metallic activation agent；
Super enriching plant is harvested before autumn and winter stubble, then applies heavy metal deactivator again, 10-30cm is turned over and is uniformly mixed, support
Shield 12-17 days；
In stubble period autumn and winter, the second crops are planted, after harvesting second crops, is applied while planting super enriching plant
It aggravates metal activation agent or lies fallow to spring in coming year stubble；
Wherein, the super enriching plant includes vetiver, castor-oil plant, Sedum alfredii Hance, black nightshade, honeysuckle or close hair fern；Described
One crops include wheat, semen viciae fabae, corn or soybean；Second crops include corn and soybean, sweet potato, millet, peanut or
Tobacco.
The stubble period in spring is July in April-；The autumn and winter stubble is September-December.
The passivator is at least one of PERFORMANCE OF MODIFIED VERMICULITE, modification biological charcoal and modified meerschaum；
The method of modifying of vermiculite includes that vermiculite and acid solution press solid-to-liquid ratio 1:10 after mixing, is placed under constant temperature
1-2h is shaken, vermiculite and acid are centrifugated, deionized water repeated washing centrifugation is then added in vermiculite after isolation, is made after drying
Obtain the PERFORMANCE OF MODIFIED VERMICULITE；The concentration of the acid solution is 0.01-0.02mol/L；The temperature of the constant temperature is 70-90 DEG C；
The method of modifying of charcoal includes under confined conditions obtained biological carbon precursor of the straw at 400-450 DEG C,
It is mixed after the charcoal presoma is crushed with ferric chloride solution, is placed in 75-95 DEG C of water-bath and is evaporated, then in 400-450
DEG C it is pyrolyzed 25-35min under confined conditions, after being cooled to room temperature, obtains the modification biological charcoal；Wherein, the charcoal forerunner
The mass ratio of ferro element is (18-22) in body and the ferric chloride solution: 1；
The method of modifying of sepiolite includes being uniformly mixed sepiolite by solid-to-liquid ratio 1:10 with acid solution, being placed in constant temperature item
6-8h, centrifugal treating, separating acid and sepiolite are shaken under part, then, in sepiolite after isolation plus deionized water repeats to wash
Washing centrifugation to pH value is 6, and the modified meerschaum is made after dry；The concentration of the acid solution is 0.8-1.2mol/L；It is described
The temperature of constant temperature is 75-85 DEG C.
The dosage of the heavy metal deactivator is 50-150kg/ mus.
The activator includes humic acid, poly-aspartic-acid, polyglutamic acid, itaconic acid, D-sorbite, citric acid, micro-
Bacteria agent and promoter；The microbial bacterial agent includes bacillus subtilis, green trichoderma bacterium, bacillus licheniformis, urease
At least one of bacillus, saccharomycete, pseudomonad；The promoter includes iminodisuccinic acid, [bis- (2- of 9,9-
Ethylhexyl) -9H- fluorenes -2,7- diyl] at least one of hypoboric acid and 4- nitrobenzophenone-β-D- cellobioside.
Further, the mass fraction of each component is in the activator, the poly- lucid asparagus of 20-25% humic acid, 15-20%
Propylhomoserin, 15-20% polyglutamic acid, 15-20% itaconic acid, 8-10% D-sorbite, 8-10% citric acid, 3-5% microbial bacteria
Agent and 0.5-2% promoter.
The preparation method of the activator includes, by 25% humic acid, 20% poly-aspartic-acid, 15% polyglutamic acid,
20% itaconic acid, 8% D-sorbite, 8% citric acid, be sieved decontamination after dry, grinding, is dissolved with water, 0.5% promoting root growth is added
Agent mixes dispersion, 3.5% microbial bacterial agent is added after spray drying, and powdered heavy metal activator is made.
The dosage of the activator is 3-10kg/ mus.
Technical solution of the present invention has the advantages that
1. the restorative procedure of farmland soil heavy metals pollution provided by the invention, this method is using heavy metal deactivator and soil
Earth is uniformly mixed, and the first crops are planted after maintenance, then plant super enriching plant, while applying heavy metallic activation agent, then so
After apply passivator, after planting the second crops, first applying heavy metal deactivator can be effectively reduced heavy metal risk of phosphate leaching loss, together
When avoid heavy metal accumulation in crops, then applying heavy metallic activation agent again, plant super enriching plant, absorb heavy metal,
Reduce the content of heavy metal in soil, heavy metal the depositing due to heavy metal deactivator in the non-coverage area of root system of plant in soil
Keeping low risk of phosphate leaching loss；And this method compensates for plants enriched technology and accounts for by selecting crop and super enriching plant
According to farmland soil, the problem of influencing farming, enable the normal farming in farmland；The present invention is using plants enriched technology and applies a huge sum of money
The problem of belonging to the method for passivator not only can fundamentally remove removing heavy metals, but also heavy metal can be carried out in long-term cropping blunt
Change processing, improves the service efficiency of soil.
2. the restorative procedure of farmland soil heavy metals pollution provided by the invention, the passivator that this method uses mainly use
Physisorphtion is passivated heavy metal, and the activator of use is mostly processing waste or produces obtained, source by waste
Extensively, value is cheap, and can chelate heavy metal, promotes heavy metal solubility, soil microbial activities can be promoted after being manured into soil,
Soil fertility is promoted, the growth of super enriching plant is promoted.In addition, the whole activation of activator is better than the passivation of passivator
Effect, in long-term cropping, heavy metal is passivated, and reduces absorption of the crop to heavy metal, and plantation is super rich after passivation
When collecting plant, activator can be such that the heavy metal being passivated is activated, to be adsorbed by super enriching plant, reduce in agricultural land soil
The content of heavy metal improves the service efficiency of soil；
Passivator main component is modified absorbing material, and the passivation to heavy metal includes the two kinds of passivation of physics and chemistry
Effect, wherein physical adsorption process more wide spectrum can also adsorb the zwitterion in soil while adsorbing heavy metal ion
And moisture, play the role of retain water and nutrients salt resistance alkali；Chemical passivation process choosing is stronger, has obligate knot to various heavy
Cooperation is used, can heavy metal-passivated ion steady in a long-term.
3. the restorative procedure of farmland soil heavy metals provided by the invention pollution, the main component of activator is rotten in this method
Growing acid, poly-aspartic-acid, polyglutamic acid is neutral or alkalescent mixture, can neutralize itaconic acid, D-sorbite and lemon
The acidity of acid makes activator overall performance neutrality, after application will not acidified soil, and the microbial bacterial agent in the activator
And on the other hand promoter promotes super enriching plant root growth, it is right to enhance its on the one hand for strengthening heavy metallic activation effect
The absorption of heavy metal.
Specific embodiment
There is provided following embodiments is to preferably further understand the present invention, it is not limited to the best embodiment party
Formula is not construed as limiting the contents of the present invention and protection scope, anyone under the inspiration of the present invention or by the present invention and its
The feature of his prior art is combined and any and identical or similar product of the present invention for obtaining, all falls within of the invention
Within protection scope.
Specific experiment step or condition person are not specified in embodiment, according to the literature in the art described routine experiment
The operation of step or condition can carry out.Reagents or instruments used without specified manufacturer, being can be by commercially available acquisition
Conventional reagent product.
The preparation method for the activator used in the following Examples and Comparative Examples includes: to gather 25% humic acid, 20%
Asparatate, 15% polyglutamic acid, 20% itaconic acid, 8% D-sorbite, 8% citric acid, impurity elimination of being sieved after dry, grinding
Matter is dissolved with water, and 0.5% iminodisuccinic acid is added, and mixes dispersion, 3.5% bacillus subtilis is added after spray drying,
Powdered heavy metal activator is made.
The method of modifying for the passivator used in the following Examples and Comparative Examples is as follows:
The method of modifying of vermiculite includes after mixing by solid-to-liquid ratio 1:10 by the hydrochloric acid of vermiculite and 0.01mol/L, being placed in
1h is shaken at 80 DEG C, is centrifugated hydrochloric acid and vermiculite, and deionized water repeated washing, centrifugation 3 are then added in vermiculite after isolation
After secondary, it dry, pulverize 100 mesh of sieving, obtain PERFORMANCE OF MODIFIED VERMICULITE；
The method of modifying of charcoal includes that corn stover obtains biological carbon precursor through 400 DEG C of closed processes, will be biological
Carbon precursor and ferric chloride solution mix (mass ratio of ferro element is 20:1 in biological carbon precursor and ferric chloride solution), are placed in
It is evaporated in 80 DEG C of water-bath, is then pyrolyzed 30min under confined conditions at 400 DEG C, then cooled to room temperature, obtain modified life
Object charcoal；
The method of modifying of sepiolite includes being uniformly mixed sepiolite by solid-to-liquid ratio 1:10 with 1mol/L hydrochloric acid, being placed in 80
8h is shaken in DEG C, centrifugal treating separates hydrochloric acid and sepiolite, and then, in sepiolite after isolation plus deionized water repeats to wash
Washing, being centrifuged to sepiolite pH value is 6, and modified meerschaum is made after drying.
Embodiment 1
The restorative procedure for present embodiments providing a kind of farmland soil heavy metals pollution, specifically includes following steps,
Late March mixes PERFORMANCE OF MODIFIED VERMICULITE and Soil tillage, and depth of ploughing is 30cm, and passivator dosage is 100kg/ mus,
Then it conserves 15 days；Then, stubble period in spring plants wheat, normal management in early April, and early July harvests wheat, recycles straw
After stalk, plough to farmland；Super enriching plant black nightshade is planted, while applying activator, 6kg/ mus, every 15 days dissolved in water
1 activator；
Late August harvests black nightshade, mixes heavy metal deactivator and Soil tillage behind arable land, and depth of ploughing is 30cm, blunt
Agent dosage is 100kg/ mus, is then conserved 15 days；Stubble period autumn and winter plants millet in early September, and normal management, 11 below the moon
After ten days harvests, super enriching plant black nightshade is planted, while applying activator, 6kg/ mus, every 15 days dissolved in water, 1 activator；
Agricultural land soil is detected after next year late Febuary harvest black nightshade.
Embodiment 2
The restorative procedure for present embodiments providing a kind of farmland soil heavy metals pollution, specifically includes following steps,
Mid-March modification biological charcoal and Soil tillage are mixed, depth of ploughing is 30cm, and passivator dosage is 120kg/
Then mu conserves 15 days；Then, stubble period in spring plants wheat, normal management in early April, and early July harvests wheat, recycling
After stalk, plough to farmland；Super enriching plant vetiver is planted, while applying activator, 8kg/ mus, every 15 days with water
Apply 1 activator；
Late August harvests vetiver, then mixes heavy metal deactivator and Soil tillage, and depth of ploughing is 30cm, blunt
Agent dosage is 120kg/ mus, is then conserved 15 days；Stubble period autumn and winter plants millet in early September, and normal management, 11 below the moon
After ten days harvests, super enriching plant vetiver is planted, while applying activator, 8kg/ mus, is activated every 15 days dissolved in water 1 time
Agent；Agricultural land soil is detected after harvest vetiver within next year 2 months.
Embodiment 3
The restorative procedure for present embodiments providing a kind of farmland soil heavy metals pollution, specifically includes following steps,
Mid-March, using mixture that mass ratio is the PERFORMANCE OF MODIFIED VERMICULITE of 3:1:1, modification biological charcoal and modified meerschaum as
Passivator is mixed with Soil tillage, and depth of ploughing is 10cm, and passivator dosage is 50kg/ mus, is then conserved 15 days；Then, the spring
Stubble period plants semen viciae fabae, normal management in early April, and early July harvest then ploughs to farmland；Super enrichment is planted to plant
Object Sedum alfredii Hance, while applying activator, 3kg/ mus, every 15 days dissolved in water, 1 activator；
Late August harvests Sedum alfredii Hance, then mixes heavy metal deactivator and Soil tillage, and depth of ploughing is 30cm,
Passivator dosage is 50kg/ mus, is then conserved 15 days；In stubble period autumn and winter, in early September sweet potato planting, normal management, 11 below the moon
After ten days harvests, super enriching plant is planted, while applying activator, 3kg/ mus, every 15 days dissolved in water, 1 activator；It is next
Agricultural land soil is detected after early Febuary in year harvest Sedum alfredii Hance.
Comparative example 1
This comparative example provides a kind of restorative procedure of farmland soil heavy metals pollution, the difference from embodiment 1 is that the
One crops are different with super enriching plant type, and the first crop planting potato in this comparative example, enriching plant is India
Leaf mustard.
Comparative example 2
This comparative example provides a kind of restorative procedure of farmland soil heavy metals pollution, the difference from example 2 is that blunt
Agent and activator species are different, and the passivator in this comparative example is zeolite, and activator is citric acid.
Comparative example 3
This comparative example provides a kind of restorative procedure of farmland soil heavy metals pollution, and the difference with embodiment 3 is blunt
Agent and activator applying mode are on the contrary, specifically comprise the following steps:
The restorative procedure for present embodiments providing a kind of farmland soil heavy metals pollution, specifically includes following steps,
Late Febuary plants Sedum alfredii Hance, while applying activator, and 6kg/ mus, every 15 days dissolved in water, 1 activator,
After early April harvests Sedum alfredii Hance, heavy metal deactivator and Soil tillage are mixed, depth of ploughing is 30cm, passivator dosage
It is 100kg/ mus, then conserves 15 days, the first tenday period of a month in May plants wheat, and normal management examines agricultural land soil after harvesting wheat
It surveys.
Test example
This test example provides the detection method and testing result of soil in embodiment 1-3 and comparative example 1-3, concrete outcome
It is shown in Table 1, detection method is as follows:
The detection method of heavy metal in soil content is resolution method, and this method is specific as follows:
It accurately weighs 0.5g pedotheque (crossing 0.15mm) sieve and in tetrafluoro crucible, adds 7mL nitric acid+3mL perchloric acid+10mL
Hydrofluoric acid covers, and stands overnight and (it is same not to stay overnight effect), and high temperature shelves heat (the control temperature 300~350 of digital display on electric hot plate
DEG C) 1 hour, it goes to cover, is heated to closely dry, be cooled to room temperature, then again plus 3mL nitric acid+2mL perchloric acid+5mL hydrofluoric acid, high temperature
Shelves continue to be heated to exclude various acid completely, and both perchloric acid white cigarette emitted to the greatest extent, add 1mL (1+1) dissolving with hydrochloric acid residue, are completely transferred to
In 25mL volumetric flask, add the ammonium chloride solution of the 100g/L of 0.5mL, constant volume, then atomic absorption spectrophotometer detects；
Content of beary metal rate of descent=(soil after 2 enriching plants harvests of the average value-the of the initial content of beary metal of soil
The average value of content of beary metal) the initial content of beary metal of/soil average value × 100%；
The testing result of soil in 1 embodiment 1 of table and comparative example 1
The testing result of soil in 2 embodiment 2 of table and comparative example 2
The testing result of soil in 3 embodiment 3 of table and comparative example 3
It is found that the restorative procedure of farmland soil heavy metals provided by the invention pollution helps to improve soil from table 1-3
Reparation to heavy metal, and this method compensates for plants enriched technology and occupies by selecting crop and super enriching plant
Farmland soil, enables the normal farming in farmland at the problem of influencing farming；The present invention is using plants enriched technology and applies heavy metal
The method of passivator can not only remove removing heavy metals, but also can be passivated processing to heavy metal in long-term cropping, improve soil
The service efficiency of earth.
In table 1, it is found that the reparation side that farmland soil heavy metals provided by the invention pollute from embodiment 1 and comparative example 1
Soil can be improved to the repairing effect of heavy metal cadmium by selecting crop and super enriching plant in method.In table 2, from reality
Example 2 and comparative example 2 are applied it is found that the present invention is conducive to soil to heavy metal by selecting passivator and activator species
The reparation of lead improves repairing effect.In table 3, from embodiment 3 and comparative example 3 it is found that the present invention passes through to passivator and activator
Application sequence selected, help to improve soil to the repairing effect of heavy metal zinc.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (7)
1. a kind of restorative procedure of farmland soil heavy metals pollution, which is characterized in that include the following steps,
First heavy metal deactivator is uniformly mixed with Soil tillage 10-30cm before plantation crops, is conserved 12-17 days；
In stubble period in spring, the first crops are planted, after first crop harvesting, plants super enriching plant, weight is administered simultaneously
Metal activation agent；
Super enriching plant is harvested before autumn and winter stubble, then applies heavy metal deactivator again, 10-30cm is turned over and is uniformly mixed, conserve 12-
17 days；
In stubble period autumn and winter, the second crops are planted, after harvesting second crops, applies weight while planting super enriching plant
Metal activation agent is lain fallow to spring in coming year stubble；
Wherein, the super enriching plant includes vetiver, castor-oil plant, Sedum alfredii Hance, black nightshade, honeysuckle or close hair fern；First agriculture
Crop includes wheat, semen viciae fabae, corn or soybean；Second crops include corn and soybean, sweet potato, millet, peanut or cigarette
Grass.
2. the method according to claim 1, wherein the passivator is PERFORMANCE OF MODIFIED VERMICULITE, modification biological charcoal and changes
At least one of property sepiolite.
3. method according to claim 1 or 2, which is characterized in that the dosage of the heavy metal deactivator is 50-150kg/
Mu.
4. method according to claim 1-3, which is characterized in that the activator includes humic acid, poly- Tianmen
Aspartic acid, polyglutamic acid, itaconic acid, D-sorbite, citric acid, microbial bacterial agent and promoter；
The promoter include iminodisuccinic acid, [9,9- bis- (2- ethylhexyl) -9H- fluorenes -2,7- diyl] hypoboric acid and
At least one of 4- nitrobenzophenone-β-D- cellobioside；
The microbial bacterial agent includes bacillus subtilis, green trichoderma bacterium, bacillus licheniformis, urease bacillus, yeast
At least one of bacterium, pseudomonad.
5. according to the method described in claim 4, it is characterized in that, the mass fraction of each component is 20- in the activator
25% humic acid, 15-20% poly-aspartic-acid, 15-20% polyglutamic acid, 15-20% itaconic acid, 8-10% D-sorbite,
8-10% citric acid, 3-5% microbial bacterial agent and 0.5-2% promoter.
6. according to the method described in claim 5, it is characterized in that, the preparation method of the activator includes, by 25% humic
Acid, 20% poly-aspartic-acid, 15% polyglutamic acid, 20% itaconic acid, 8% D-sorbite, 8% citric acid, after dry, grinding
Be sieved decontamination, is dissolved with water, and 0.5% promoter is added, and mixes dispersion, 3.5% microbial bacterial agent is added after spray drying, makes
Obtain powdered heavy metal activator.
7. method according to claim 1-6, which is characterized in that the dosage of the activator is 3-10kg/ mus.
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| CN110893413A (en) * | 2019-11-26 | 2020-03-20 | 西北师范大学 | Method for restoring cadmium-polluted soil by utilizing in-situ activation, passivation and high-accumulation crops |
| CN111108839A (en) * | 2019-11-22 | 2020-05-08 | 华南农业大学 | Method for repairing cadmium-polluted rice field by intercropping sedum alfredii and broad beans |
| CN111299316A (en) * | 2019-11-25 | 2020-06-19 | 中节能大地环境修复有限公司 | Plant extraction-agronomic regulation combined remediation method for slightly-alkaline heavy metal contaminated farmland soil |
| CN112427454A (en) * | 2020-12-04 | 2021-03-02 | 榕知(杭州)信息技术有限公司 | Microbial preparation for repairing heavy metal contaminated soil and preparation method thereof |
| CN112931078A (en) * | 2021-02-01 | 2021-06-11 | 郑州轻工业大学 | Method for safely utilizing sedum-wheat intercropping and repairing cadmium-polluted soil |
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| CN113058989A (en) * | 2021-03-16 | 2021-07-02 | 苏州益亮生态修复有限公司 | Method for restoring farmland polluted by heavy metals |
| CN113042001A (en) * | 2021-03-26 | 2021-06-29 | 维塔探索(广东)科技有限公司 | Porous biochar for improving severe pollution and preparation method thereof |
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