CN110373197A - A kind of soil passivator, preparation method and application - Google Patents
A kind of soil passivator, preparation method and application Download PDFInfo
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- CN110373197A CN110373197A CN201910677753.9A CN201910677753A CN110373197A CN 110373197 A CN110373197 A CN 110373197A CN 201910677753 A CN201910677753 A CN 201910677753A CN 110373197 A CN110373197 A CN 110373197A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Environmental & Geological Engineering (AREA)
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of soil passivator comprising by animal bone powder through pyrogenous origin bone black material.Preparation method includes: S10, the animal bone powder after drying is put into crucible, is placed in the Muffle furnace of protective atmosphere；S20, the Muffle furnace is warming up to scheduled pyrolysis temperature with scheduled heating rate；S30, it is pyrolyzed 1~3h under the scheduled pyrolysis temperature, is then cooled to room temperature to the Muffle furnace, prepares the bone black material.Further, the bone black material ball milling that pyrolysis is formed can also be formed into micro-nano bone black material using ball-milling technology.In the present invention, can be carried out in-situ immobilization applied to the improvement of heavy metal pollution of soil as soil passivator through pyrogenous origin bone black material by animal bone powder to the soil of heavy metal pollution, realize ecology improvement and sustainable development.
Description
Technical field
The invention belongs to remediation contaminated soil technical fields, and in particular to a kind of soil passivator and preparation method thereof and answer
With.
Background technique
Economic fast development and size of population surge keep global environmental pollution situation increasingly serious, wherein heavy metal-polluted soil
Have become one of main problem of environmental pollution.Heavy metal-polluted soil has high toxicity, is not easily decomposed, easily spreads and pass through food chain
The features such as passing can dramatically increase the disease incidence of the malignant diseases such as cancer, cause to seriously threaten to people's health and ecological environment.This
Outside, the quality and yield for the crop cultivated on heavy-metal contaminated soil also occur significantly decline, cause potential grain and
Food-safety problem.
Fixation in situ recovery technique is a kind of heavy metal pollution of soil Treatment process of high-efficiency and economic, by adding into soil
Enter and be passivated agent material, apply heavy metal deactivator material into soil, can by absorption, precipitating, complexing, ion exchange and
Redox etc. one is the physics, chemistry and biological effect of class, reduces the biological effectiveness and migration of heavy metal ion.
Conventional soil passivator such as lime, flyash, red mud, zeolite, inorganic clay mineral material, phosphate and NaS
Deng, though can heavy metal in preferable stable soil, its amount of application is big, and larger to the disturbance of soil, it is unfavorable to take a long view
In the long-term recovery of soil.Common soil passivator is artificial conjunction there are also hydroxyapatite (HAP), HAP used at present
At nano-HAP, and artificial synthesized nano-HAP directly apply in soil environment can reduce soil organic matter content, destroy
Soil nutrient elements are balanced and there are the risks of eutrophication.
Charcoal is to be pyrolyzed preparation under the conditions of anoxybiotic or anoxic and relative low temperature (< 700 DEG C) by biological organic matter
The carbon containing aromatising substance of surface oxygen-containing functional group rich in has and prepares that raw material is extensive, without secondary pollution and cost
The advantages that cheap, improves tool positive effect in heavy metal-polluted soil reparation and soil quality.However, charcoal is directly used in soil
There is also certain limitations in practical applications for passivation, and if amount of application is larger, single standard biologic charcoal passivator is to soil
The effect of middle heavy metal is limited and improvement soil physico-chemical property is slower.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of soil passivator and preparation method thereof, the soil
Earth passivator is applied to the improvement of heavy metal pollution of soil, can improve to the solidification effect of heavy metal in soil and obviously
It increases soil fertility and improves soil physico-chemical property.
For achieving the above object, present invention employs following technical solutions:
A kind of soil passivator comprising by animal bone powder through pyrogenous origin bone black material.
Further, the bone black material forms micro-nano bone black material via ball-milling technology ball milling.
Specifically, the animal bone powder be by animal skeleton through crush is formed, the animal skeleton selected from pig bone, ox bone,
At least one of sheep bone, chicken bone, duck bone and fish-bone.
The present invention also provides a kind of preparation methods of soil passivator as described above comprising: it will be dynamic after drying
Object bone meal is pyrolyzed under protective atmosphere and forms the bone black material.
Specifically, the preparation method comprising steps of
S10, the animal bone powder after drying is put into crucible, is placed in the Muffle furnace of protective atmosphere；
S20, the Muffle furnace is warming up to scheduled pyrolysis temperature with scheduled heating rate；
S30, it is pyrolyzed 1~3h under the scheduled pyrolysis temperature, is then cooled to room temperature to the Muffle furnace, preparation obtains
Obtain the bone black material.
Wherein, the scheduled heating rate is 15~25 DEG C/min, and the scheduled pyrolysis temperature is 300~700 DEG C.
Wherein, the protective atmosphere is at least one of nitrogen, helium, neon and argon gas.
Further, the bone black that the preparation method further comprises the steps of: S40, forms pyrolysis using ball-milling technology
Material ball milling forms micro-nano bone black material.
Wherein, the step S40 is specifically included: the bone black material that pyrolysis is formed is added in high-energy ball milling tank,
And grinding aid agent solution is added and carries out ball milling；Wherein, in ball-milling technology, control ratio of grinding media to material is 5:1~100:1, and rotational speed of ball-mill is
100r/min~600r/min, Ball-milling Time are 10min~48h.
Another aspect of the present invention is to provide a kind of soil passivator as described above in heavy metal pollution of soil improvement
Application.
Soil passivator provided in an embodiment of the present invention and preparation method thereof is raw material through pyrolysis preparation using animal bone powder
Bone black material is as soil passivator, and not only oxygen-containing functional group rich in, is also rich in the hydroxyl phosphorus with porous structure
Lime stone (Ca5(PO4)3(OH)2, HAP) and nutrients composition, the carbon therein such as calcium, phosphorus and nitrogen be distributed in good
It is native containing organic matter and hydroxyl and calcium, phosphorus etc. in the porous structure of biocompatibility and active natural mineral hydroxyapatite
Earth nutrient ingredient becomes the stabilization of heavy metal-polluted soil and improves the ideal material of soil physico-chemical property, and bone black is to heavy metal
Ion has stronger stablizing effect, can be acted on by the forms such as surface precipitating, complexing and fragrance complexing and heavy metal,
Improve the crystallized ability to heavy metal ion in soil and aqueous solution.
Ca, C for being rich in bone black material, N, P element can significantly improve soil fertility and improve soil physico-chemical property, wherein
The hydroxyapatite (HAP) for the porous structure being rich in again can be to avoid directly largely using artificial synthesized nano-HAP to soil
Caused by environmental risk.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation method of soil passivator provided in an embodiment of the present invention；
Fig. 2 and Fig. 3 is SEM figure of the ox bone charcoal of the embodiment of the present invention 1 before ball milling；
Fig. 4 and Fig. 5 is the SEM figure of the ox bone charcoal of the embodiment of the present invention 1 after ball milling.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, with reference to the accompanying drawing to specific reality of the invention
The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in attached drawing and according to
The embodiments of the present invention of attached drawing description are only exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only
Show with closely related structure and/or processing step according to the solution of the present invention, and be omitted little with relationship of the present invention
Other details.
Present embodiments provide a kind of soil passivator comprising by animal bone powder through pyrogenous origin bone black material.?
In further preferred technical solution, the bone black material also forms micro-nano bone black material via ball-milling technology ball milling.
Specifically, the animal bone powder refer to animal waste bone or meat products processing leftover bits and pieces through crush shape
At, mainly also refer to animal skeleton, the animal skeleton be, for example, in pig bone, ox bone, sheep bone, chicken bone, duck bone and fish-bone extremely
Few one kind.
The embodiment of the invention also provides the preparation methods of soil passivator as described above, by the animal bone powder after drying
Pyrolysis forms the bone black material under protective atmosphere.Refering to fig. 1, the soil passivator preparation method comprising steps of
S10, the animal bone powder after drying is put into crucible, is placed in the Muffle furnace of protective atmosphere.Wherein, it will do
Animal skeleton after dry is ground into bone meal in being put into crucible, and the protective atmosphere is in nitrogen, helium, neon and argon gas
It is at least one.
S20, the Muffle furnace is warming up to scheduled pyrolysis temperature with scheduled heating rate.Wherein, described scheduled
Heating rate is preferably 10~25 DEG C/min；The scheduled pyrolysis temperature is preferably 300~700 DEG C.
S30, it is pyrolyzed 1~3h under the scheduled pyrolysis temperature, is then cooled to room temperature to the Muffle furnace, preparation obtains
Obtain bone black material.
S40, the bone black material ball milling that pyrolysis is formed is formed into micro-nano bone black material using ball-milling technology.Specific packet
It includes: the bone black material that pyrolysis is formed is added in high-energy ball milling tank, and grinding aid agent solution is added and carries out ball milling.Wherein,
In ball-milling technology, control ratio of grinding media to material is 5:1~100:1, and rotational speed of ball-mill is 100r/min~600r/min, and Ball-milling Time is
10min~48h；The grinding aid can choose as one of ethyl alcohol, methanol, water, acetone, n-hexane, normal heptane etc. or several
The mixing of kind, preferably nontoxic ethanol solution and water.
Soil passivator as provided above, the improvement for being applied to heavy metal pollution of soil have the following advantages:
(1), the bone black material using animal bone powder as raw material through pyrolysis preparation, carbon are distributed in good biology
In the porous structure of compatibility and active natural mineral hydroxyapatite, sought containing organic matter and the soil such as hydroxyl and calcium, phosphorus
Elemental composition is supported, wherein the Ca, C being rich in, N, P element can significantly improve soil fertility and improve soil physico-chemical property, wherein rich
The hydroxyapatite (HAP) of the porous structure contained again can be to avoid directly largely making soil using artificial synthesized nano-HAP
At environmental risk.
(2), the bone black material ball milling that pyrolysis is formed in the preferred scheme, is formed into micro-nano bone black material as passivation
Agent has many advantages, such as that small partial size, large specific surface area, high surface activity and reducing power are strong, controls heavy metal pollution of soil
Reason is more efficient, and heavy metal ion can effectively be made to be turned from the high form of bioavailability to the low form of bioavailability
Become.
(3), the preparation process of the soil passivator is simple, low in cost, is conducive on a large scale at production and for conduct
Soil passivator is promoted.Wherein, it prepares to form bone black material using animal waste, is conducive to the recycling of resource, become useless
For treasured.
Currently, people are huge to the consumption of various cattle foods in life, the poultry of generation give up bone quantity also with
Increase.Bone is given up by Commercial cultivation in spite of part poultry, however still fails to be fully used in the presence of the useless bone resource in part,
And the bad of processing just pollutes the environment.The present invention can effectively utilize the useless bone resource of animal, can generate biggish economy
Benefit and reduce this pollution of part waste to environment.
Application of the soil passivator as described above in heavy metal pollution of soil improvement, specifically may is that the soil
Earth passivator is dispersed in water, and forms uniform suspension, and suspension is imposed on soil by spray pattern, may further be led to
Cross and mix or turn over equal measures and come into full contact with passivator with soil, thus reach reduction heavy metal in soil (such as Pb, Cd,
Cu and Zn etc.) available state content purpose.
Embodiment 1
The bovine bone powder obtained after Os Bovis seu Bubali after drying is crushed is put into crucible, is placed in the Muffle furnace of nitrogen protection
It is pyrolyzed (Pintsch process), continues logical nitrogen after the completion of pyrolysis, Muffle in-furnace temperature is made to be down to room temperature, take out black bone black material
Material.
(1), 450 DEG C are warming up to the heating rate of 10 DEG C/min in Muffle furnace, then continue to be pyrolyzed at such a temperature
2.0h prepares bone black material sample 1.Fig. 2 and Fig. 3 is that the difference for the bone black material sample 1 that the present embodiment prepares is put
The SEM figure of big multiplying power, from figures 2 and 3, it will be seen that particulate material of the bone black material for random geometry, and material surface
Tiny gap structure is presented.
(2), 600 DEG C are warming up to the heating rate of 20 DEG C/min in Muffle furnace, then continue to be pyrolyzed at such a temperature
1.0h prepares bone black material sample 2.
(3), it takes a part application ball-milling technology ball milling of bone black material sample 1 to form micro-nano bone black material, obtains bone
Carbon Materials sample 3.Fig. 4 and Fig. 5 is the SEM figure of the different enlargement ratios of bone black material sample 3, as can be seen from Figure 4 and Figure 5,
Bone black material has micro-nano dimensional structure after ball milling.
(4), it takes a part application ball-milling technology ball milling of bone black material sample 2 to form micro-nano bone black material, obtains bone
Carbon Materials sample 4.
Wherein, the ball-milling technology condition of above (3) and (4) item are as follows: select ethanol solution for grinding aid, control ratio of grinding media to material
For 100:1, rotational speed of ball-mill 200r/min, Ball-milling Time 1h.
Its physical-chemical parameters is tested respectively for the above bone black material sample 1~4, as shown in table 1 below.
The physical-chemical parameters of 1 bone black material sample 1~4 of table
Its constituent content is tested respectively for the above bone black material sample 1 and 2, as shown in table 2 below.
The constituent content (%) of ox bone Carbon Materials under the different pyrolytical conditions of table 2
| Sample | C (wt%) | N (wt%) | O (wt%) | P (wt%) | Ca (wt%) |
| Bone black material sample 1 | 34.26 | 8.50 | 31.64 | 8.34 | 17.26 |
| Bone black material sample 2 | 23.15 | 7.56 | 36.76 | 10.13 | 22.39 |
It can be found from table 2, not only containing the carbon and oxygen element in standard biologic charcoal in bone black material, also containing a large amount of
Ca, N and P etc. are conducive to the nutrient of soil property improvement.
Embodiment 2
By crush it is dry after ox bone bone meal be put into crucible, be placed in the Muffle furnace of nitrogen protection atmosphere, with 10 DEG C/
Min is warming up to 600 DEG C, continues to be pyrolyzed 2h at such a temperature, is cooled to Muffle furnace under conditions of continuing to be passed through protective gas
Room temperature takes out black bio charcoal solid material, and the black bio charcoal solid material washing and drying is obtained bone black material.
Take a part of bone black material achieved above as soil passivator A1.
The bone black material application ball-milling technology ball milling for taking another part achieved above forms micro-nano bone black material, as soil
Earth passivator B1.Ball-milling technology is specifically: the bone black material after drying being added in high-energy ball milling tank, chooses water as grinding aid
Agent, and controlling ratio of grinding media to material is 100:1, revolving speed 300r/min, Ball-milling Time 12h.To the end of ball milling, it is centrifuged, is quiet
Drying is set, micro-nano bone black material is obtained.
Tongling, Anhui Province somewhere copper tailing topsoil (0cm~20cm) is taken, which is successively carried out to reject gravel and broken
Root natural air drying, is mixed, is pulverized, after the processing of 18 mesh nylon mesh excessively, as trying soil.PH value for trying soil is 7.12,
It is in neutrality, moisture content 5.71%, Available Cu content are 598.0mg/kg.
30g/ parts are weighed for trying soil, is 0.5% and 1.0% point for trying soil weight according to soil passivator amount of application
The soil passivator A1 and soil passivator B1 for also known as the present embodiment being taken to prepare, every part is added in the water of 30.0mL point
It dissipates, is sprayed onto for being uniformly mixed it in examination soil.After soil stabilization culture 21 days, a huge sum of money is carried out after soil is air-dried
Belong to the test of available state: weighing soil after 10.0g is air-dried, the available state of copper in soil is extracted with 20.0mL DTPA.Through detecting,
Biologically effective state content of the contaminated soil through heavy metal copper in soil before and after bone black composite material is as shown in table 3 below.
Table 3 is for the soil conditions before and after examination soil application soil passivator A1 or B1
Embodiment 3
By crush it is dry after ox bone bone meal be put into crucible, be placed in the Muffle furnace of nitrogen protection atmosphere, with 10 DEG C/
Min is warming up to 450 DEG C, continues to be pyrolyzed 2h at such a temperature, is cooled to Muffle furnace under conditions of continuing to be passed through protective gas
Room temperature takes out black bio charcoal solid material, and the black bio charcoal solid material washing and drying is obtained bone black material.
Take a part of bone black material achieved above as soil passivator A2.
The bone black material application ball-milling technology ball milling for taking another part achieved above forms micro-nano bone black material, as soil
Earth passivator B2.Ball-milling technology is specifically: the bone black material after drying being added in high-energy ball milling tank, chooses water as grinding aid
Agent, and controlling ratio of grinding media to material is 100:1, revolving speed 300r/min, Ball-milling Time 12h.To the end of ball milling, it is centrifuged, is quiet
Drying is set, micro-nano bone black material is obtained.
Tongling, Anhui Province somewhere copper tailing topsoil (0cm~20cm) is taken, which is successively carried out to reject gravel and broken
Root natural air drying, is mixed, is pulverized, after the processing of 18 mesh nylon mesh excessively, as trying soil.PH value for trying soil is 7.12,
It is in neutrality, moisture content 5.71%, Available Cu content are 598.0mg/kg.
30g/ parts are weighed for trying soil, is 0.5% and 1.0% point for trying soil weight according to soil passivator amount of application
The soil passivator A2 and soil passivator B2 for also known as the present embodiment being taken to prepare, every part is added in the water of 30.0mL point
It dissipates, is sprayed onto for being uniformly mixed it in examination soil.After soil stabilization culture 21 days, a huge sum of money is carried out after soil is air-dried
Belong to the test of available state: weighing soil after 10.0g is air-dried, the available state of copper in soil is extracted with 20.0mL DTPA.Through detecting,
Biologically effective state content of the contaminated soil through heavy metal copper in soil before and after bone black composite material is as shown in table 4 below.
Table 4 is for the soil conditions before and after examination soil application soil passivator A2 or B2
Embodiment 4
The present embodiment as different from Example 2, chosen in the present embodiment for try soil and embodiment 2 difference.
Specifically, soil passivator A1 and soil passivator B1 are prepared in the way of embodiment 2.
Fuyang, Zhejiang zinc smelting factory pollution arable land topsoil (0cm~20cm) is taken, which is successively rejected
Gravel and broken, after natural air drying, mixing, pulverize, crossing the processing of 18 mesh nylon mesh, as trying soil.For trying the pH of soil
Value be 7.63, in alkalescent, moisture content 13.71%, soil available Zn and Cd content be respectively 230mg/kg and
36.9mg/kg。
30g/ parts are weighed for trying soil, is 0.5% and 1.0% point for trying soil weight according to soil passivator amount of application
The soil passivator A1 and soil passivator B1 for also known as the present embodiment being taken to prepare, every part is added in the water of 30.0mL point
It dissipates, is sprayed onto for being uniformly mixed it in examination soil.After soil stabilization culture 21 days, a huge sum of money is carried out after soil is air-dried
Belong to the test of available state: weighing soil after 10.0g is air-dried, the available state of Zn and Cd in soil is extracted with 20.0mL DTPA.Through examining
It surveys, biologically effective state content such as the following table 5 institute of the contaminated soil through bone black composite material heavy metal in soil Zn and Cd before and after the processing
Show.
Table 5 is for the soil conditions before and after examination soil application soil passivator A1 or B1
Embodiment 5
The present embodiment as different from Example 3, chosen in the present embodiment for try soil and embodiment 3 difference.
Specifically, soil passivator A2 and soil passivator B2 are prepared in the way of embodiment 3.
Fuyang, Zhejiang zinc smelting factory pollution arable land topsoil (0cm~20cm) is taken, which is successively rejected
Gravel and broken, after natural air drying, mixing, pulverize, crossing the processing of 18 mesh nylon mesh, as trying soil.For trying the pH of soil
Value be 7.63, in alkalescent, moisture content 13.71%, soil available Zn and Cd content be respectively 230mg/kg and
36.9mg/kg。
30g/ parts are weighed for trying soil, is 0.5% and 1.0% point for trying soil weight according to soil passivator amount of application
The soil passivator A2 and soil passivator B2 for also known as the present embodiment being taken to prepare, every part is added in the water of 30.0mL point
It dissipates, is sprayed onto for being uniformly mixed it in examination soil.After soil stabilization culture 21 days, a huge sum of money is carried out after soil is air-dried
Belong to the test of available state: weighing soil after 10.0g is air-dried, the available state of Zn and Cd in soil is extracted with 20.0mL DTPA.Through examining
It surveys, biologically effective state content such as the following table 6 institute of the contaminated soil through bone black composite material heavy metal in soil Zn and Cd before and after the processing
Show.
Table 6 is for the soil conditions before and after examination soil application soil passivator A2 or B2
It should be noted that be all that ox bone charcoal is selected to be illustrated as specific embodiment in above embodiments, this field
The content recorded according to specification of technical staff, the ox bone charcoal in each embodiment can be replaced with into other animal bone chars,
Such as pig bone, sheep bone, chicken bone, duck bone and fish-bone etc., the effect of preparation process and acquirement are all with using ox bone phase
As.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (10)
1. a kind of soil passivator, which is characterized in that including by animal bone powder through pyrogenous origin bone black material.
2. soil passivator according to claim 1, which is characterized in that the bone black material is via ball-milling technology ball milling shape
At micro-nano bone black material.
3. soil passivator according to claim 1 or 2, which is characterized in that the animal bone powder is passed through by animal skeleton
It crushes and is formed, the animal skeleton is selected from least one of pig bone, ox bone, sheep bone, chicken bone, duck bone and fish-bone.
4. a kind of preparation method of soil passivator a method according to any one of claims 1-3 characterized by comprising will dry
Animal bone powder afterwards is pyrolyzed under protective atmosphere and forms the bone black material.
5. the preparation method of soil passivator according to claim 4, which is characterized in that the preparation method includes step
It is rapid:
S10, the animal bone powder after drying is put into crucible, is placed in the Muffle furnace of protective atmosphere；
S20, the Muffle furnace is warming up to scheduled pyrolysis temperature with scheduled heating rate；
S30, it is pyrolyzed 1~3h under the scheduled pyrolysis temperature, is then cooled to room temperature to the Muffle furnace, prepares institute
State bone black material.
6. the preparation method of soil passivator according to claim 5, which is characterized in that the scheduled heating rate is
15~25 DEG C/min, the scheduled pyrolysis temperature is 300~700 DEG C.
7. the preparation method of soil passivator according to claim 5, which is characterized in that the protective atmosphere be nitrogen,
At least one of helium, neon and argon gas.
8. according to the preparation method of any soil passivator of claim 5-7, which is characterized in that the preparation method is also
Comprising steps of S40, using ball-milling technology by pyrolysis formed the bone black material ball milling form micro-nano bone black material.
9. the preparation method of soil passivator according to claim 8, which is characterized in that the step S40 is specifically included:
The bone black material that pyrolysis is formed is added in high-energy ball milling tank, and grinding aid agent solution is added and carries out ball milling；Wherein, ball milling
In technique, control ratio of grinding media to material be 5:1~100:1, rotational speed of ball-mill be 100r/min~600r/min, Ball-milling Time be 10min~
48h。
10. a kind of application of soil passivator a method according to any one of claims 1-3 in heavy metal pollution of soil improvement.
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|---|---|---|---|---|
| CN111847423A (en) * | 2020-08-20 | 2020-10-30 | 南开大学 | Preparation method and application of phosphorus modified biochar |
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Application publication date: 20191025 |