CN106694541A - Method for repairing heavy metal pollution tailings with charcoal-based slow release fertilizer and imperata cylindrica - Google Patents
Method for repairing heavy metal pollution tailings with charcoal-based slow release fertilizer and imperata cylindrica Download PDFInfo
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- CN106694541A CN106694541A CN201611242285.5A CN201611242285A CN106694541A CN 106694541 A CN106694541 A CN 106694541A CN 201611242285 A CN201611242285 A CN 201611242285A CN 106694541 A CN106694541 A CN 106694541A
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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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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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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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention discloses a method for repairing heavy metal pollution tailings with charcoal-based slow release fertilizer and imperata cylindrica. The method includes the following steps that according to the mass ratio, 1-5 parts of charcoal, 100 parts of polyurethane emulsion with the concentration being 40%-50%, 5-10 parts of starch and 150-300 parts of distilled water are mixed to prepare a coating solution; 40-60 parts of composite organic fertilizer particles are suspended into 10-20 parts of the prepared coating solution, and slow release coating treatment is conducted to obtain the charcoal-based slow release fertilizer; the prepared charcoal-based slow release fertilizer is mixed with the heavy metal pollution tailings; and the imperata cylindrica is planted into the tailings containing the charcoal-based slow release fertilizer. By the adoption of the method, the treating effect of the heavy metal pollution tailings is good, the method is environmentally friendly, cost is low, and pollution is small; and heavy metal pollution is reduced, and meanwhile cycling utilization of recourses and lasting effect playing of fertilizer nutrients can be achieved.
Description
Technical field
The present invention relates to a kind of method that biological charcoal slow-release fertilizer cooperates with cogongrass repairing heavy metal pollution mine tailing.
Background technology
Mineral resources are non-renewable resources for the survival of mankind, to we provide abundant material base.Metal
During mining, ground through Mechanical Crushing, after screening wherein valuable mineral matter, the solid residue waste of discharge is tail
Ore deposit.According to statistics, the gross reserves of the current mine tailing of China is about 8,000,000,000 tons, and is being increased rapidly with 10% speed every year.In natural wind
In the presence of change, rain-out and biological factor, the mine tailing release toxic heavy metal element of long-term exposed stacking, poisonous residual
The acid waste water that containing sulfur minerals trigger in floating agent and barren rock, to the soil around mining area, surface water and groundwater, big compression ring
Border etc. can cause serious harm.Meanwhile, Tailings Dam exacerbates the contradiction that China has a large population and a few land to the occupancy of land resource, restriction
Social economic development of region and ecological environment security.
In recent years, the Controlling research on the discarded ground in mill tailings storehouse is more, and the administering method being related to mainly has three classes：Work
Journey Physical, chemical regulation method and biological restoration.By changing heavy metal in soil existence form, its animal migration and life are reduced
Thing availability, or removing heavy metals are directly removed from soil, or change planting patterns, to avoid heavy metal from flowing into food chain.
Study more at present, heavy metal pollution of mine is reduced by this green bio reactor of plant.Phytoremediation technology
Be using plant and its rhizosphere microorganism to the Metal uptake in mine tailing or soil, volatilization, conversion, degraded, fixation and
Reach removal purpose.In nature, there is the floristics much to mine tailing environment with adaptability, these plants turn into mine tailing
Storehouse repair discardedly in pionner, the accumulation ability that their heavy metals show often 100 times of common plant with
On, these plants are transferred to aerial part by by the heavy metal in soil, to reduce (the Wei court of the content of beary metal in soil
Sun, Chen Tongbin heavy metal super-enriched plants and phytoremediation technology progress [J] Acta Ecologica Sinicas, 2001,07:1196-
1203.).The common rehabilitation plant for heavy-metal contaminated soil has Sedum alfredii Hance (the Sedum alfredii Hances such as Yang Xiaoe (Sedum
Alfredii H) --- a kind of new Zinc hyperaccumulation plant [J] Science Bulletins, 2002,13:1003-1006.), Viola baoshanensis
(a kind of such as Liu Wei Viola baoshanensis (Viola baoshanensis) --- new Cd-hyperaccumulator [J] Science Bulletins,
2003,19:2046-2049.), ciliate desert-grass (CN101049603B；The such as Chen Tongbin arsenic super enriching plant ciliate desert-grass and its to arsenic
Enrichment characteristics [J] Science Bulletins, 2002,03:207-210.), sweetalyssum (Ni), native chaste tree shepherd's purse (Pb), Elsholtzia haichowensis (Cu) etc..
It is phytoremediation technology low cost, workable, heavy metal pollution of mine is not only reduced, can also increase vegetative coverage, effectively solution
Certainly the problems such as mine soil erosion, soil erosion, it has also become the optimization technique that Mine Abandoned Land pollution ecology is administered.
Mine tailing composition is more based on the grains of sand and powder, and content of beary metal is high, organic matter and the barren, poor air permeability of nutrient etc.,
Mostly bare area, the phenomenon that weathers is serious, and the growth for limiting vegetation is settled down.The removal effect of the same species heavy metal in different regions
Fruit differs, and phytoremediation is largely dependent upon screened floristics.Cogongrass is perennial herbaceous plant, existence and
Fertility is extremely strong, because of its powerful complicated root system system, can make full use of the nutrient in soil, poor in arid
In lean environment also can growth and breeding, thus often be used as mining area recovery pionner.(copper tailing is certainly for Shen Zhangjun etc.
Right in good time distribution and Leaf N phosphorus metabolism the regulation enzymatic activity dynamic Acta Phytoecologica Sinicas for settling down cogongrass to internal nitrogen phosphorus, 2012,
02:Research 159-168.) finds that cogongrass can improve the soil property of copper mine, for entering for other species provides habitat
Condition.(the Different spontaneous plant communities in Sanmen Pb/Zn mine such as Wang
tailing and their effects on mine tailing physico-chemical
properties.Environmental Earth Sciences,2011,62(4):779-86.) discovery, cogongrass and Caulis Miscanthis floriduli
Also there is good result to the ecological recovery of Pb-Zn tailings.Cogongrass is gradually applied to different type mine tailing as pionner
It is preliminary to repair, but application in femic mine tailing is less, carries out cogongrass to femic mine tailing heavy metal pollution repairing research, can
For the Heavy Metal Pollution Control and ecological reconstruction of Disused tailing land provide theoretical foundation.
Because the nutritive element contents such as the organic matter of Tailings Dam, nitrogen and phosphorus are relatively low, there is that to repair vegetation difficult in a short time suitable more
Problem is answered, some researchs are using several vegetation combine d bioremediations (CN101974910A) and optimization vegetation kind shoot survival percent
Etc. (CN101444185B) means, realize that the firm vegetable layer without mine tailing under the conditions of earthing is set up, and side slope is fixed and water and soil conservation.
Some use microbial bacterial agent or activator (CN102936574B, CN103272832B), and the form of heavy metal ion is carried out
Conversion, promotes the absorption and extraction of plant heavy metal element, so that fortification of plants restoration of soil polluted by heavy metal effect.Due to
The dosage and effect of microbial bacterial agent are limited, and activator price general charged costly and brings secondary pollution problem, repairing effect
Also it is difficult to ensure that, effect stability and the popularization and application of phytoremediation technology is limited to a certain extent.
China is large agricultural country, there is abundant agricultural crop straw and forest tree resource, and annual stalk yield is 800,000,000 tons；Greatly
Gone out of use amount stalk and forest more or directly burned, this had both caused the waste in large amount of biomass energy source, was also brought seriously to environment
Pollution.Research finds, is prepared into height aromatization structure through pyrolysis charring by various forest and agricultural biomass under anoxic conditions
Charcoal after, its in terms of soil improvement, reduction of greenhouse gas discharge and polluted soil reparation all have application potential.Charcoal
Pore structure is flourishing, and specific surface area is big and with abundant oxygen-containing functional group, and heavy metal element has stronger adsorption capacity.This
Outward, charcoal can improve soil pH value, and phosphorus content is enriched, and containing various mineral elements, be planted for mine tailing heavy metal pollution
During thing is repaired, nutrition can be provided for the growth of pionner.Change of the charcoal to soil physics structure, can promote root system of plant
Growth and the absorption of heavy metal element.In heavy metal pollution Disused tailing land environment, charcoal is cooperateed with pionner
The effect disquisition for administering heavy-metal contaminated soil is simultaneously few.Explore based on charcoal and its base manure to phytoremediation heavy metal pollution
Influence research, can for heavy metal polluted soil Reel improvement technical support be provided.
The content of the invention
Regarding to the issue above, the present invention provides a kind of reduction heavy metal pollution of soil, improves soil texture and nutritional condition
Biological charcoal slow-release fertilizer cooperate with cogongrass repairing heavy metal pollution mine tailing method.
To reach above-mentioned purpose, a kind of biological charcoal slow-release fertilizer of the present invention cooperates with the side of cogongrass repairing heavy metal pollution mine tailing
Method, comprises the following steps：
(1) by 1~5 mass parts charcoal, the polyaminoester emulsion that 100 mass parts concentration are 40%~50%, 5~10 mass
Part starch and 150~300 mass parts distilled water are mixed to prepare coating solution；
(2) the composite organic fertilizer particle of 40~60 mass parts is suspended in 10~20 mass parts prepared in step (1)
Coating solution in, and carry out slow release Cotton seeds be obtained biology charcoal slow-release fertilizer；
(3) obtained biological charcoal slow-release fertilizer in step (2) is mixed with heavy metal pollution mine tailing；
(4) cogongrass is planted in the heavy metal pollution mine tailing for being mixed into biological charcoal slow-release fertilizer in step (3).
Preferably, the preparation of charcoal is comprised the following steps in the step (1)：
(1) collect stalk or forest is cleaned and crush using salt solution；
(2) will mix with potassium hydroxide and under the conditions of 300 DEG C~700 DEG C under the stalk or forest oxygen free condition of crushing
The charcoal that pyrolysis carbonization obtains being loaded with potassium element for 4~8 hours.
Preferably, also including step after the step (3)：In the heavy metal pollution tail containing biological charcoal slow-release fertilizer
Earthworm culture medium is mixed into ore deposit and of the right age earthworm is delivered.
Preferably, heavy metal pollution mine tailing is iron magnesium type mine tailing in the step (3)；The iron magnesium type mine tailing includes
Serpentine tailing, olivine tailing mine and magnetic iron ore mine tailing；
Step (3) concretely comprise the following steps：By the iron magnesium type mine tailing and charcoal slow-release fertilizer with 5~8：1 mass
Than mixing.
Preferably, further comprising the steps of after the step (4)：
(1) cogongrass is gathered in after 70~90 days planting seasons, and gathers mine tailing and use HF-HNO3-HClO4Three Acid digestion methods are cleared up,
Using content of beary metal in ICP-OES measure mine tailings；
(2) no longer repaired if content of beary metal in mine tailing is not higher than predetermined value；If mine tailing heavy metal in soil
Content then returns to the step (3) higher than predetermined value.
Beneficial effects of the present invention：, used as important pionner type, plantation difficulty is low, and growth is rapid, population for cogongrass
Density is high, it is adaptable to establishing in large scale, it is not necessary to special management；As non-consumption plant, a huge sum of money for enrichment can be prevented effectively from
Category pollutant enters food chain.Additionally, adaptation and enrichment and growth of the cogongrass in Disused tailing land, not only view and admire with certain
Property, beautify mining area ecological environment, also help the improvement and productivity lifting of Tailings Dam soil fertility.
Simultaneously using charcoal combination composite organic fertilizer, coating type biology charcoal slow-release fertilizer is obtained, is applied to heavy metal
The reparation of mine tailing is polluted, its technique and application process are simple, and production cost is relatively low；Not only reduce the unreasonable heap of forest and agricultural biomass
The pollution effect to environment is put, good economic results in society can also be brought.The basicity that biomass carbon has in itself, can be effective
Reduce the acidity of Disused tailing land；Larger specific surface area and loose structure, easily absorption mineral and heavy metal element, continually and steadily
Promotion pionner growth and the absorption of heavy metal element, biological charcoal slow-release fertilizer can promote with the synergy of plant
Enter the restoration of the ecosystem of heavy-metal contaminated soil, improve regional environmental quality.
Specific embodiment
The present invention will be further described below.
Embodiment 1
The method that a kind of biological charcoal slow-release fertilizer of the present embodiment cooperates with cogongrass repairing heavy metal pollution mine tailing, including following step
Suddenly：
(1) by 1~5 mass parts charcoal, the polyaminoester emulsion that 100 mass parts concentration are 40%~50%, 5~10 mass
Part starch and 150-300 mass parts distilled water are mixed to prepare coating solution；
(2) 40~60 mass parts composite organic fertilizer particles are suspended in 10~20 mass parts bags prepared in step (1)
In clothing liquid, and carry out the prepared biology charcoal slow-release fertilizer of slow release Cotton seeds；
(3) obtained biological charcoal slow-release fertilizer in step (2) is mixed with heavy metal pollution mine tailing；
(4) cogongrass is planted in the heavy metal mine tailing for being mixed into biological charcoal slow-release fertilizer in step (3).
According to by the charcoal of 1-5 mass parts, the concentration 40%-50% polyaminoester emulsions of 100 mass parts, 5-10 mass parts
Starch and 150-300 mass parts distilled water mix, persistently stir 20-30min, that is, be obtained coating solution；By 10~20 parts
Coating solution is placed on fluid bed together with 40~60 parts of compound organic fertilizer particles and is coated treatment by seed-coating machine and biology is obtained
Charcoal slow-release fertilizer；Obtained biological charcoal slow-release fertilizer is well mixed stabilization treatment with the heavy metal pollution mine tailing for needing to administer again
Cogongrass seedling is planted after a period of time.
In the present embodiment absorption of the plant to heavy metal element in mine tailing can be greatly improved using biological charcoal slow-release fertilizer
Efficiency, promotes good growth of the rehabilitation plant in mine tailing matrix, improves the soil texture and nutritional condition of mine tailing, it is ensured that residual
The long-acting stabilisation of heavy metal, and there is environment-friendly, non-secondary pollution, low cost and workable.
Embodiment 2
Based on embodiment 1, the preparation of charcoal is comprised the following steps in step (1) described in the present embodiment：
(1) collect stalk or forest is cleaned and crush using salt solution；
(2) will mix with potassium hydroxide and under the conditions of 300 DEG C~700 DEG C under the stalk or forest oxygen free condition of crushing
The charcoal that pyrolysis carbonization obtains being loaded with potassium element for 4~8 hours.
Potassium hydroxide and carbon dioxide react generation potassium carbonate in the present embodiment；Charcoal is prepared in pyrolysis carbonization
During add potassium hydroxide, because charcoal is rich in micropore, the charcoal of preparation is loaded with potassium element；The biology for preparing afterwards
Also potassium element is loaded with charcoal slow-release fertilizer；Potassium element promote cogongrass plant strain growth and it is photosynthetic carry out, improve cogongrass
Absorb the efficiency of heavy metal ion.
Embodiment 3
Based on embodiment 1, the present embodiment also includes step after the step (3)：Containing biological charcoal slow-release fertilizer
Heavy metal pollution mine tailing in be mixed into earthworm culture medium and deliver of the right age earthworm.
The specific enzymes of a kind of energy decomposing protein, fat and wood fibre can be secreted in earthworm body, therefore is lived in soil
Rubbish, activated sludge and Wastage of food industry can all eat decomposition；Earthworm can also absorb mercury in soil, lead and cadmium etc. simultaneously
Heavy metal contaminants are simultaneously enriched with earthworm body, and taking out earthworm after a period of time makes the heavy metal being enriched with earthworm body depart from ecological
Environment.
Earthworm energy chesson, increases the soil organism and improves structure simultaneously, in promoting acid or basic soil to be changed into
Property soil.
In the present embodiment, earthworm is delivered on the basis of biological charcoal slow-release fertilizer, serve the effect for reducing heavy metal, together
When further improve cogongrass growing environment improve cogongrass absorb heavy metal ion efficiency.
Embodiment 4
Based on embodiment 1, heavy metal pollution mine tailing is iron magnesium type mine tailing in step (3) described in the present embodiment；The iron
Magnesium type mine tailing includes serpentine tailing, olivine tailing mine and magnetic iron ore mine tailing；
Step (3) concretely comprise the following steps：By the iron magnesium type mine tailing and charcoal slow-release fertilizer with 5~8：1 mass
Than mixing；
It is further comprising the steps of after the step (4)：
(1) cogongrass is gathered in after 70~90 days planting seasons, and gathers mine tailing matrix and use HF-HNO3-HClO4Three Acid digestion methods
Clear up, using content of beary metal in ICP-OES measure mine tailing matrix；
(2) no longer repaired if content of beary metal in mine tailing matrix is not higher than predetermined value；If in mine tailing matrix soil
The content of heavy metal then returns to the step (3) higher than predetermined value.
Heavy metal pollution mine tailing repairs specific step：
Collect stalk or forest is cleaned and crush using salt solution；With hydrogen-oxygen under the stalk or forest oxygen free condition that will crush
Change potassium mixing and the charcoal that carbonization obtains being loaded with potassium element for 4~8 hours is pyrolyzed under the conditions of 300 DEG C~700 DEG C；
By polyaminoester emulsion, 5~10 parts of starch and 150- that 1~5 part of charcoal, 100 parts of concentration are 40%~50%
300ml distilled water is mixed to prepare coating solution；40~60 parts of composite organic fertilizer particles are suspended among the coating solution of preparation and are made
Into fluid bed, and carry out the prepared biology charcoal slow-release fertilizer of slow release Cotton seeds；Heavy metal pollution mine tailing and charcoal are sustained
Fertilizer is with 5~8：1 mass ratio mixes；Earthworm culture medium is mixed into the heavy metal pollution mine tailing containing biological charcoal slow-release fertilizer and is thrown
Of the right age earthworm is put, afterwards in plantation cogongrass；
Cogongrass, taking-up earthworm are gathered in after 70~90 days planting seasons, and gathers mine tailing and use HF-HNO3-HClO4Three acid are cleared up
Method is cleared up, using content of beary metal in ICP-OES measure mine tailings；
No longer repaired if content of beary metal in mine tailing is not higher than predetermined value；If the content of mine tailing heavy metal in soil
Then continue to repeat the above steps higher than predetermined value up to content of beary metal not higher than predetermined value in mine tailing matrix.
The present embodiment is obtained coating type biology charcoal slow-release fertilizer using charcoal combination composite organic fertilizer, is applied to weight
The reparation of metallic pollution mine tailing, its technique and application process are simple, and production cost is relatively low；Forest and agricultural biomass is not only reduced not conform to
The pollution effect that reason is banked up to environment, can also bring good economic results in society.The basicity that biomass carbon has in itself, can
Effectively reduce the acidity of Disused tailing land；Larger specific surface area and loose structure, easily absorption mineral and heavy metal element, continue
The synergy energy of the growth and the absorption of heavy metal element of the promotion cogongrass plant of stabilization, biological charcoal slow-release fertilizer and plant
Enough promote the restoration of the ecosystem of heavy-metal contaminated soil, improve regional environmental quality.
It should be pointed out that the present invention is during heavy metal pollution mine tailing is administered, the plantation of plant, the plantation cycle and
The applied amount of biological charcoal slow-release fertilizer, need to according to the change of Tailings Dam type appropriate adaptation, so as to reach preferably repair control
Reason.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should be defined by claim is defined.
Claims (5)
1. a kind of method that biological charcoal slow-release fertilizer cooperates with cogongrass repairing heavy metal pollution mine tailing, it is characterised in that：：Including following
Step：
(1) 1~5 mass parts charcoal, the polyaminoester emulsion that 100 mass parts concentration are 40%~50%, 5~10 mass parts are formed sediment
Powder and 150~300 mass parts distilled water are mixed to prepare coating solution；
(2) the composite organic fertilizer particle of 40~60 mass parts is suspended in the bag of 10~20 mass parts prepared in step (1)
In clothing liquid, and carry out the prepared biology charcoal slow-release fertilizer of slow release Cotton seeds；
(3) obtained biological charcoal slow-release fertilizer in step (2) is mixed with heavy metal pollution mine tailing；
(4) cogongrass is planted in the heavy metal pollution mine tailing for being mixed into biological charcoal slow-release fertilizer in step (3).
2. a kind of method that biological charcoal slow-release fertilizer cooperates with cogongrass repairing heavy metal pollution mine tailing as claimed in claim 1, it is special
Levy and be：The preparation of charcoal is comprised the following steps in the step (1)：
(1) collect stalk or forest is cleaned and crush using salt solution；
(2) will mix with potassium hydroxide under the stalk or forest oxygen free condition of crushing and be pyrolyzed under the conditions of 300 DEG C~700 DEG C
The charcoal that carbonization obtains being loaded with potassium element for 4~8 hours.
3. a kind of method that biological charcoal slow-release fertilizer cooperates with cogongrass repairing heavy metal pollution mine tailing as claimed in claim 1, it is special
Levy and be：Also include step after the step (3)：It is mixed into the heavy metal pollution mine tailing containing biological charcoal slow-release fertilizer
Earthworm culture medium simultaneously delivers of the right age earthworm.
4. a kind of method that biological charcoal slow-release fertilizer cooperates with cogongrass repairing heavy metal pollution mine tailing as claimed in claim 1, it is special
Levy and be：Heavy metal pollution mine tailing is iron magnesium type mine tailing in the step (3)；The iron magnesium type mine tailing includes serpentine tail
Ore deposit, olivine tailing mine and magnetic iron ore mine tailing；
Step (3) concretely comprise the following steps：By the iron magnesium type mine tailing and charcoal slow-release fertilizer with 5~8：1 mass ratio is mixed
Close.
5. a kind of method that biological charcoal slow-release fertilizer cooperates with cogongrass repairing heavy metal pollution mine tailing as claimed in claim 1, it is special
Levy and be：It is further comprising the steps of after the step (4)：
(1) cogongrass is gathered in after 70~90 days planting seasons, and gathers mine tailing and use HF-HNO3-HClO4Three Acid digestion methods are cleared up, and utilize
ICP-OES determines content of beary metal in mine tailing；
(2) no longer repaired if content of beary metal in mine tailing is not higher than predetermined value；If the content of mine tailing heavy metal in soil
The step (3) is then returned higher than predetermined value.
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| CN201611242285.5A CN106694541A (en) | 2016-12-29 | 2016-12-29 | Method for repairing heavy metal pollution tailings with charcoal-based slow release fertilizer and imperata cylindrica |
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| CN108271452A (en) * | 2017-12-15 | 2018-07-13 | 安徽金阳光农业服务有限公司 | One kind being rich in heavy metal tailing phytoremediation |
| CN110235746A (en) * | 2019-04-19 | 2019-09-17 | 湖北声荣再生资源利用有限公司 | A kind of environmental-friendly plant culture medium and preparation method thereof |
| CN111036174A (en) * | 2019-12-13 | 2020-04-21 | 南京师范大学 | Magnetic biochar based on iron-enriched plants and preparation method and application thereof |
| CN111185469A (en) * | 2020-01-15 | 2020-05-22 | 厦门海石生态环境股份有限公司 | Abandoned mine restoration method based on biological habitat restoration |
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| CN114847124A (en) * | 2022-06-17 | 2022-08-05 | 北京清大绿源科技有限公司 | Greening method by planting biomass carbon particles |
| CN114958821A (en) * | 2022-06-15 | 2022-08-30 | 中化地质矿山总局地质研究院 | Immobilized SRB pellet, ecological particle, preparation method and application thereof |
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Application publication date: 20170524 |