CN108018046A - A kind of soil conditioner for cadmium pollution soil and preparation method thereof - Google Patents
A kind of soil conditioner for cadmium pollution soil and preparation method thereof Download PDFInfo
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- CN108018046A CN108018046A CN201711486134.9A CN201711486134A CN108018046A CN 108018046 A CN108018046 A CN 108018046A CN 201711486134 A CN201711486134 A CN 201711486134A CN 108018046 A CN108018046 A CN 108018046A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- 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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- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of soil conditioner for cadmium pollution soil and preparation method thereof, include the raw material of following parts by weight：48 parts of 18 24 parts of diatomite, 10 15 parts of zeolite powder, 16 25 parts of plant ash, 15 20 parts of bed-silt, 2 3.5 parts of 4 nitrile of purine, 14 18 parts of slag, 1.4 2.5 parts of saponin, 28 parts of lime and sodium alginate.Raw material sources of the present invention are extensive, preparation process is simple, pass through the interaction between various raw materials, cadmium ion in soil, chromium ion and copper ion can be converted into its most stable of compound in nature in existence form by the finished product of preparation, so as to lose toxicity and migration, secondary pollution will not be produced, there are good market prospects.
Description
Technical field
The present invention relates to soil remediation field, is specifically a kind of soil conditioner for cadmium pollution soil.
Background technology
Geochemical process and mankind's activity in natural environment, such as metallurgy, industrial wastewater discharge, pesticide, lead jointly
The heavy metal concentration in soil and groundwater has been caused increasingly to increase.Heavy metal generally refers to proportion in 5.0g/cm3Above about 45
Kind element.It is notable that heavy metal in Study on environmental pollution is primarily referred to as the bio-toxicity such as Pb, Cd, Hg, Cr and metalloid As
Element, further include the elements such as the heavy metal Zn with certain toxicity, Cu, Co, Ni and Sn.Soil is by heavy metal pollution at present
It is more and more, heavy metal pollution farmland area in China's accounts for the 1/5 of cultivated area up to 20,000,000 hectares.Every year because of soil pollution
And the grain yield of reduction is up to 10,000,000 tons, direct economic loss is up to more than 100 hundred million yuan.Heavy metal pollution of soil refers to that the mankind live
It is dynamic to input heavy metal in soil, cause heavy metal content in soil apparently higher than normal contents, and cause eco-environmental quality to dislike
The phenomenon of change, cadmium pollution are exactly the most common type heavy metal pollution, and the cadmium in contaminated soil is cadmium in food and water
Main source.Cadmium in soil, especially available Cd can be absorbed by crops such as rice, wheats eventually enters into agricultural product
In, make agricultural product security reduction, all there is great threat to health and ecological safety.
It is by improving soil quality, reducing absorption of the plant to cadmium, promote plant growth, protect using soil conditioner
The effective measures of Cd-polluted farmland agricultural product quality and safety are demonstrate,proved, but the country is applied to the improvement of cadmium pollution soil repair at present
Agent has the disadvantage that：1st, organic modifying agent production process discharges pollutants in itself, and for there are secondary pollution when repairing；
2nd, inorganic modifying agent is generally cured by making cadmium form hydroxide or carbonate precipitation, once environmental condition is sent out
Raw to change following deacidification rain, chromium easily discharges again, this just brings inconvenience for the use of people.
The content of the invention
It is an object of the invention to provide a kind of soil conditioner for cadmium pollution soil, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides following technical solution：
A kind of soil conditioner for cadmium pollution soil, includes the raw material of following parts by weight：18-24 parts of diatomite, zeolite powder
10-15 parts, 16-25 parts of plant ash, 15-20 parts of bed-silt, 2-3.5 parts of purine -4- nitriles, 14-18 parts of slag, saponin
4-8 parts of 1.4-2.5 parts, 2-8 parts of lime and sodium alginate.
As the further scheme of the present invention：The moisture content of bed-silt is not higher than 4%.
As the further scheme of the present invention：Diatomaceous granularity is 1.45-3.67mm, and the granularity of zeolite powder is 0.15-
0.78mm。
The preparation method of the soil conditioner for cadmium pollution soil, comprises the following steps that：
Step 1, it is by diatomite, zeolite powder, plant ash, bed-silt, purine -4- nitriles, slag and lime pulverizing and fully mixed
Close, be then deposited in shady and cool local 30-50 days to take shelter from rain, air-dry and crush, obtain the first mixture；
Step 2, saponin and sodium alginate are mixed and add the water of 3-5 times of gross weight, ultrasonic wave is uniformly dispersed, and obtains
First mixed solution；
Step 3, the first mixed solution and the first mixture are added in ball mill and are milled to 100-200 mesh, then in high-speed stirring
Mix in machine and stir evenly, the product after stirring is dry under 28-35 degrees Celsius, you can obtains finished product.
As the further scheme of the present invention：The power that ultrasonic wave disperses in step 2 is 480-640W, the frequency of ultrasonic wave
Rate is 23-40KHz.
As the further scheme of the present invention：The mixing speed of step 3 high speed mixer is 2400-3000rpm.
The application method of the soil conditioner for cadmium pollution soil, comprises the following steps that：By soil conditioner with
Cadmium pollution soil is 1 according to mass ratio:130-150 dry mixing is sufficiently mixed, and then plus water continues to stir, and amount of water is so that soil
Moisture content is 24-30%, is conserved 8-12 days after stirring evenly completely.
Compared with prior art, the beneficial effects of the invention are as follows：Raw material sources of the present invention are extensive, and preparation process is simple, lead to
The interaction between various raw materials is crossed, the cadmium ion in soil, chromium ion and copper ion can be converted into by the finished product of preparation
Its most stable of compound in nature in existence form, so as to lose toxicity and migration, will not produce secondary pollution,
With good market prospects.
Embodiment
The technical solution of this patent is described in more detail with reference to embodiment.
Embodiment 1
A kind of soil conditioner for cadmium pollution soil, includes the raw material of following parts by weight：18 parts of diatomite, zeolite powder 10
Part, 16 parts of plant ash, 15 parts of bed-silt, 2 parts of purine -4- nitriles, 14 parts of slag, 1.4 parts of saponin, 2 parts of lime and alginic acid
4 parts of sodium.The moisture content of bed-silt is 2.4%.
The preparation method of the soil conditioner for cadmium pollution soil, comprises the following steps that：
Step 1, it is by diatomite, zeolite powder, plant ash, bed-silt, purine -4- nitriles, slag and lime pulverizing and fully mixed
Close, be then deposited in the shady and cool place taken shelter from rain 38 days, air-dry and crush, obtain the first mixture；
Step 2, saponin and sodium alginate are mixed and add the water of 4 times of gross weight, ultrasonic wave is uniformly dispersed, ultrasonic wave
Scattered power is 540W, and the frequency of ultrasonic wave is 23KHz, obtains the first mixed solution；
Step 3, the first mixed solution and the first mixture are added in ball mill and are milled to 140 mesh, then in homogenizer
In stir evenly, the product after stirring is dry under 31 degrees Celsius, you can obtains finished product.
The application method of the soil conditioner for cadmium pollution soil, comprises the following steps that：By soil conditioner with
Cadmium pollution soil is 1 according to mass ratio:145 dry mixing are sufficiently mixed, and then plus water continues to stir, and amount of water is so that soil water-containing
Rate is 26%, is conserved 10 days after stirring evenly completely.
The soil for improveing front and rear is measured, after the leaching concentration of cadmium drops to improvement by the 0.87mg/L before improveing
0.04mg/L, the leaching concentration of chromium are dropped to the 0.05mg/L after improvement by the 0.67mg/L before improveing, the leaching concentration of copper by
3.64mg/L before improvement drops to the 0.13mg/L after improvement.
Embodiment 2
A kind of soil conditioner for cadmium pollution soil, includes the raw material of following parts by weight：20 parts of diatomite, zeolite powder 12
Part, 19 parts of plant ash, 17 parts of bed-silt, 2.8 parts of purine -4- nitriles, 15 parts of slag, 1.9 parts of saponin, 4.5 parts of lime and sea
6 parts of mosanom.Diatomaceous granularity is 2.26mm, and the granularity of zeolite powder is 0.42mm.
The preparation method of the soil conditioner for cadmium pollution soil, comprises the following steps that：
Step 1, it is by diatomite, zeolite powder, plant ash, bed-silt, purine -4- nitriles, slag and lime pulverizing and fully mixed
Close, be then deposited in the shady and cool place taken shelter from rain 50 days, air-dry and crush, obtain the first mixture；
Step 2, saponin and sodium alginate are mixed and add the water of 3 times of gross weight, ultrasonic wave is uniformly dispersed, ultrasonic wave
Scattered power is 560W, and the frequency of ultrasonic wave is 40KHz, obtains the first mixed solution；
Step 3, the first mixed solution and the first mixture are added in ball mill and are milled to 160 mesh, then in homogenizer
In stir evenly, the product after stirring is dry under 35 degrees Celsius, you can obtains finished product.
The application method of the soil conditioner for cadmium pollution soil, comprises the following steps that：By soil conditioner with
Cadmium pollution soil is 1 according to mass ratio:140 dry mixing are sufficiently mixed, and then plus water continues to stir, and amount of water is so that soil water-containing
Rate is 28%, is conserved 10 days after stirring evenly completely.
The soil for improveing front and rear is measured, after the leaching concentration of cadmium drops to improvement by the 0.94mg/L before improveing
0.02mg/L, the leaching concentration of chromium are dropped to the 0.03mg/L after improvement by the 0.84mg/L before improveing, the leaching concentration of copper by
2.96mg/L before improvement drops to the 0.08mg/L after improvement.
Embodiment 3
A kind of soil conditioner for cadmium pollution soil, includes the raw material of following parts by weight：23 parts of diatomite, zeolite powder 14
Part, 23 parts of plant ash, 18 parts of bed-silt, 3.3 parts of purine -4- nitriles, 17 parts of slag, 2.1 parts of saponin, 6.5 parts of lime and sea
7 parts of mosanom.The moisture content of bed-silt is 3.5%.
The preparation method of the soil conditioner for cadmium pollution soil, comprises the following steps that：
Step 1, it is by diatomite, zeolite powder, plant ash, bed-silt, purine -4- nitriles, slag and lime pulverizing and fully mixed
Close, be then deposited in the shady and cool place taken shelter from rain 44 days, air-dry and crush, obtain the first mixture；
Step 2, saponin and sodium alginate are mixed and add the water of 5 times of gross weight, and ultrasonic wave is uniformly dispersed, and obtain the
One mixed solution；
Step 3, the first mixed solution and the first mixture are added in ball mill and are milled to 170 mesh, then with 2700rpm's
Rotating speed stirs evenly in homogenizer, and the product after stirring is dry under 30 degrees Celsius, you can obtains finished product.
The application method of the soil conditioner for cadmium pollution soil, comprises the following steps that：By soil conditioner with
Cadmium pollution soil is 1 according to mass ratio:130 dry mixing are sufficiently mixed, and then plus water continues to stir, and amount of water is so that soil water-containing
Rate is 25%, is conserved 12 days after stirring evenly completely.
The soil for improveing front and rear is measured, after the leaching concentration of cadmium drops to improvement by 1.24 mg/L before improveing
0.05mg/L, the leaching concentration of chromium drops to the 0.02mg/L after improvement, the leaching concentration of copper by the 0.93mg/L before improveing
0.16mg/L after improvement is dropped to by the 4.75mg/L before improveing.
Embodiment 4
A kind of soil conditioner for cadmium pollution soil, includes the raw material of following parts by weight：24 parts of diatomite, zeolite powder 15
Part, 25 parts of plant ash, 20 parts of bed-silt, 3.5 parts of purine -4- nitriles, 18 parts of slag, 2.5 parts of saponin, 8 parts of lime and seaweed
Sour 8 parts of sodium.The moisture content of bed-silt is 3.5%.Diatomaceous granularity is 2.84mm, and the granularity of zeolite powder is 0.48mm.
The preparation method of the soil conditioner for cadmium pollution soil, comprises the following steps that：
Step 1, it is by diatomite, zeolite powder, plant ash, bed-silt, purine -4- nitriles, slag and lime pulverizing and fully mixed
Close, be then deposited in the shady and cool place taken shelter from rain 45 days, air-dry and crush, obtain the first mixture；
Step 2, saponin and sodium alginate are mixed and add the water of 4 times of gross weight, ultrasonic wave is uniformly dispersed, ultrasonic wave
Scattered power is 600W, and the frequency of ultrasonic wave is 40KHz, obtains the first mixed solution；
Step 3, the first mixed solution and the first mixture are added in ball mill and are milled to 160 mesh, then with 3000rpm's
Rotating speed stirs evenly in homogenizer, and the product after stirring is dry under 35 degrees Celsius, you can obtains finished product.
The application method of the soil conditioner for cadmium pollution soil, comprises the following steps that：By soil conditioner with
Cadmium pollution soil is 1 according to mass ratio:150 dry mixing are sufficiently mixed, and then plus water continues to stir, and amount of water is so that soil water-containing
Rate is 28%, is conserved 10 days after stirring evenly completely.
The soil for improveing front and rear is measured, after the leaching concentration of cadmium drops to improvement by the 0.98mg/L before improveing
0.01mg/L, the leaching concentration of chromium are dropped to the 0.03mg/L after improvement by the 0.73mg/L before improveing, the leaching concentration of copper by
4.21mg/L before improvement drops to the 0.06mg/L after improvement.
Comparative example 1
Except purine -4- nitriles are not contained, remaining component and preparation method are same as Example 3.
The soil for improveing front and rear is measured, after the leaching concentration of cadmium drops to improvement by the 0.85mg/L before improveing
0.68mg/L, the leaching concentration of chromium are dropped to the 0.94mg/L after improvement by the 1.28mg/L before improveing, the leaching concentration of copper by
3.84mg/L before improvement drops to the 3.12mg/L after improvement.
It can be seen that effect of the product of embodiment 1-4 in terms of cadmium, chromium and copper leaching concentration is reduced is excellent from above-mentioned data
In the product of comparative example 1.
The crystal structure of zeolite is by silicon（Aluminium）Oxygen tetrahedron is linked to be the screen work of three-dimensional, has in screen work of all sizes
Hole and passage, have very big opening, have ion exchangeable, adsorbing separation, diatomite have it is fine and smooth, loose, light,
Porous, water imbibition and the strong property of permeability, under an electron microscope it is observed that special porous construction, recycles gleditsia sinensis
Glycosides, alginic acid, purine -4- nitriles, slag and lime are modified zeolite and diatomite, using ion therein and cadmium ion,
Exchange interaction occurs for chromium ion and copper ion, and heavy metal is introduced wherein and is allowed to firm combining, proportion metal surface is adsorbed more
Safety and stability, i.e., be converted into its most stable of chemical combination in nature in existence form by cadmium ion, chromium ion and copper ion
Thing, so as to lose toxicity and migration, will not produce secondary pollution.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (7)
1. a kind of soil conditioner for cadmium pollution soil, it is characterised in that include the raw material of following parts by weight：Diatomite
18-24 parts, 10-15 parts of zeolite powder, 16-25 parts of plant ash, 15-20 parts of bed-silt, 2-3.5 parts of purine -4- nitriles, slag 14-
4-8 parts of 18 parts, 1.4-2.5 parts of saponin, 2-8 parts of lime and sodium alginate.
2. the soil conditioner according to claim 1 for cadmium pollution soil, it is characterised in that the bed-silt
Moisture content is not higher than 4%.
3. the soil conditioner according to claim 1 for cadmium pollution soil, it is characterised in that the diatomaceous grain
Spend for 1.45-3.67mm, the granularity of zeolite powder is 0.15-0.78mm.
4. a kind of preparation method of soil conditioner for cadmium pollution soil as described in claim 1-3 is any, its feature
It is, comprises the following steps that：
Step 1, it is by diatomite, zeolite powder, plant ash, bed-silt, purine -4- nitriles, slag and lime pulverizing and fully mixed
Close, be then deposited in shady and cool local 30-50 days to take shelter from rain, air-dry and crush, obtain the first mixture；
Step 2, saponin and sodium alginate are mixed and add the water of 3-5 times of gross weight, ultrasonic wave is uniformly dispersed, and obtains
First mixed solution；
Step 3, the first mixed solution and the first mixture are added in ball mill and are milled to 100-200 mesh, then in high-speed stirring
Mix in machine and stir evenly, the product after stirring is dry under 28-35 degrees Celsius, you can obtains finished product.
5. the preparation method of the soil conditioner according to claim 4 for cadmium pollution soil, it is characterised in that described
The power that ultrasonic wave disperses in step 2 is 480-640W, and the frequency of ultrasonic wave is 23-40KHz.
6. the preparation method of the soil conditioner according to claim 4 for cadmium pollution soil, it is characterised in that described
The mixing speed of step 3 high speed mixer is 2400-3000rpm.
7. a kind of application method of soil conditioner for cadmium pollution soil as described in claim 1-3 is any, its feature
It is, comprises the following steps that：According to mass ratio it is 1 by soil conditioner and cadmium pollution soil:130-150 dry mixing is sufficiently mixed,
Then plus water continues to stir, and amount of water conserves 8-12 days make it that soil moisture content is 24-30% after stirring evenly completely.
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| CN201711486134.9A CN108018046A (en) | 2017-12-30 | 2017-12-30 | A kind of soil conditioner for cadmium pollution soil and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108728109A (en) * | 2018-06-01 | 2018-11-02 | 湖南图强科技开发有限公司 | A kind of soil sanitation agent and preparation method thereof for Rice Cropping |
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| CN101538469A (en) * | 2009-04-29 | 2009-09-23 | 广东省农业科学院土壤肥料研究所 | Compound conditioner for soil pollution remediation and preparation method thereof |
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| CN108728109A (en) * | 2018-06-01 | 2018-11-02 | 湖南图强科技开发有限公司 | A kind of soil sanitation agent and preparation method thereof for Rice Cropping |
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Application publication date: 20180511 |