CN109513740A - One kind is for alkaline heavy metal contaminated soil renovation agent and its application method and application - Google Patents
One kind is for alkaline heavy metal contaminated soil renovation agent and its application method and application Download PDFInfo
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- CN109513740A CN109513740A CN201811416217.5A CN201811416217A CN109513740A CN 109513740 A CN109513740 A CN 109513740A CN 201811416217 A CN201811416217 A CN 201811416217A CN 109513740 A CN109513740 A CN 109513740A
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- soil
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- repairing agent
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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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- 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
- C09K2101/00—Agricultural use
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to one kind for alkaline heavy metal contaminated soil renovation agent and its application method and application, the soil-repairing agent includes bone meal and oxalic acid, the application method of the soil-repairing agent are as follows: mix soil-repairing agent with fertilizer, in being manured into soil jointly, it is turned over, and adjusts the water content of soil.The soil-repairing agent passes through the reasonable compatibility of bone meal and oxalic acid, can ensure that soil fertility, green economy can will not make basic soil pH vary widely while rehabilitating soil, there is splendid lasting repairing effect to alkaline heavy metal contaminated soil.
Description
Technical field
The invention belongs to heavy metal-polluted soils to repair field, be related to a kind of soil-repairing agent and its application method and application, especially
It is related to a kind of for alkaline heavy metal contaminated soil renovation agent and its application method and application.
Background technique
Heavy metal pollution of soil recovery technique mainly include by control for the purpose of soil control technique and to repair as mesh
Phytoremediation technology.Soil control technique includes agronomy regulation technology and solidification and stabilization recovery technique again.In-situ solidifying
Stabilization Remediation Technology refers to by adjusting soil physico-chemical property and series of chemical, and the toxic heavy metal in soil is consolidated
It is fixed, or the inactive form of chemical property is converted it into, reduce the biological effectiveness of heavy metal.Phytoremediation technology is usually
Refer to the heavy metal removed in contaminated soil using the extraction effect of super enriching plant, plant extract is considered as solving a soil huge sum of money
Belong to one of pollution problem ideal method, but it is always problem of the pendulum before environmental science interface that remediation efficiency is not high.It is practical at present
In the heavy metal pollution of soil repair of development, mainly repaired with solidification and stabilization based on, auxiliary agronomy regulation technology etc..Compared with
Repairing chemical material for common cadmium pollution has alkaline modifying agent (lime, magnesia etc.), clay mineral (zeolite, sepiolite
Deng), phosphate (calcium magnesium phosphate, calcium superphosphate etc.) and organic matter (charcoal, organic compost etc.).
It is less to the research of alkaline heavy metal contaminated soil remediation at present compared to acid heavy metal contaminated soil.
CN108393344A discloses a kind of method for reducing cadmium accumulation for paddy rice in acid slight cadmium pollution soil, including such as
Lower step: before acid slight cadmium pollution soil is turned over, soil pH conditioner is uniformly spread fertilizer over the fields in the cadmium pollution soil
Surface, then soil is turned over, is mixed well, applies nitrogen, phosphorus, potash fertilizer again after soil water balance；In conjunction with transplanting
Cadmium low absorption rice varieties keep normal irrigation management.Method of the invention is easy to operate, reliable, is easy to be received by farmer,
Using rear quick, to prevention and treatment heavy metal pollution of soil, ensure that quality of rice has a very important significance safely.But this method
It can only be for the reparation of acid slight cadmium pollution soil.
CN107118010A discloses a kind of heavy metal-passivated Water soluble fertilizer compound additive, and raw material includes: by weight
20-35 parts of clay mineral, 10-20 parts of nanometer hydroxyapatite, 2-8 parts of carboxymethyl cellulose, phosphate-modified compounding albumen 8-
15 parts, 3-7 parts of bacillus subtilis, 5-15 parts of solubilizer, 1-3 parts of poly-aspartic-acid, 1-5 parts of pH adjusting agent, growth regulating
0.5-3 parts of agent；Also disclose a kind of preparation method of heavy metal-passivated Water soluble fertilizer compound additive.The present invention has effectively been passivated soil
Heavy metal in earth reduces water-soluble state content of beary metal in soil, improves yield, improves soil pollution, but this is compound
Additive can not effectively repair the cadmium pollution soil of alkalinity.
CN106914488A discloses a kind of soil-repairing agent for cadmium pollution rice field and application, by weight, this hair
The soil-repairing agent of bright offer includes offal charcoal 40-70, sepiolite 10-20, diatomite 10-20, light burnt powder 5-10, lime 5-
10, calcium magnesium phosphate 5-20, zinc fertilizer 0.5-2 and microbial bacterial agent 1-5.Soil-repairing agent is uniformly sprinkling upon to native table, then turning over makes
Soil-repairing agent is sufficiently mixed with contaminated soil, and application amount is 100-300kg/ mus.The soil-repairing agent is using simple, cost
Cheap, high-efficiency environment friendly.But it still can not effectively repair the cadmium pollution soil of alkalinity.
Therefore, develop it is a kind of can effectively repair alkaline heavy metal pollution and green economy soil-repairing agent and its use
Methods and applications are necessary.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of soil-repairing agent and its application method
And application, it especially provides a kind of for alkaline heavy metal contaminated soil renovation agent and its application method and application.
In order to achieve that object of the invention, the invention adopts the following technical scheme:
On the one hand, the present invention provides a kind of for alkaline heavy metal contaminated soil renovation agent, the soil-repairing agent packet
Include bone meal and oxalic acid.
The soil-repairing agent is by the reasonable compatibility to bone meal and oxalic acid, in the case where ensureing soil fertility, green
Economy, rehabilitating soil while, will not make the pH value of soil vary widely；In addition, bone meal is as a kind of neutral slow release
Phosphate can slowly discharge phosphate radical, and the activation by formula mesoxalic acid to it, can be to alkaline heavy metal contaminated soil
Generate splendid lasting repairing effect.Meanwhile the usage ratio of bone meal and oxalic acid can according to the needs of actual conditions arbitrarily
It adjusts.
Preferably, the pH value of the bone meal is 7.0-7.5, such as 7.0,7.1,7.2,7.3,7.4 or 7.5 etc..
Preferably, the phosphorus content of the bone meal be 10-20%, such as 10%, 11%, 12%, 13%, 14%, 15%,
16%, 17%, 18%, 19% or 20% etc..
In the present invention, the partial size of the bone meal be 0.2-3mm, such as 0.2mm, 0.5mm, 1mm, 1.2mm, 1.5mm,
2mm, 2.5mm, 2.7mm or 3mm etc..
The partial size of bone meal is smaller or surface area is bigger, more advantageous to the repairing effect of enhancing soil.
On the other hand, the present invention provides a kind of application method of soil-repairing agent as described above, the methods are as follows: will be native
Earth renovation agent is mixed with fertilizer, is manured into soil jointly, is turned over, and adjust the water content of soil.
The application method is simple and easy, and cost is relatively low.
Preferably, in the soil-repairing agent bone meal sowing amount be soil quality to be repaired 0.2-1%, such as
0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1% etc..
Preferably, the sowing amount of the soil-repairing agent mesoxalic acid is the 0.5-5% of soil quality to be repaired, such as
0.5%, 0.8%, 1%, 2%, 3%, 4% or 5% etc..
Preferably, the depth turned over be 20-50cm, such as 20cm, 25cm, 30cm, 35cm, 40cm, 45cm or
50cm etc., the number turned over are 2-10 times, such as 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, 9 times or 10 are inferior.
Preferably, the water content for adjusting soil be adjusting soil water content to 18-35%, such as 18%,
20%, 25%, 27%, 30%, 32%, 33% or 35% etc..
In another aspect, the present invention also provides a kind of soil-repairing agents as described above in repairing alkaline heavy metal contaminated soil
Application.
Preferably, the heavy metal pollution is cadmium pollution.
Preferably, the heavy metal pollution is lead cadmium combined pollution.
Compared with prior art, the present invention has the advantage that
The soil-repairing agent is by the reasonable compatibility to bone meal and oxalic acid, in the case where ensureing soil fertility, green
Economy, rehabilitating soil while, will not make changes of pH or vary widely；In addition, bone meal is as a kind of neutral sustained release
Acid phosphate can slowly discharge phosphate radical, and the activation by formula mesoxalic acid to it, can be to alkaline heavy metal Polluted Soil
Earth generates splendid lasting repairing effect.Meanwhile the usage ratio of bone meal and oxalic acid can according to the needs of actual conditions with
Meaning is adjusted.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example to further illustrate the technical scheme of the present invention, but the present invention is not limited in scope of embodiments.
The content of pollutant in soil sample used in following embodiment are as follows: total cadmium 10.2mg/Kg, total lead 920mg/
Kg, pH value 7.8 use method in " soil quality Available Lead and Cadmium detrmination atomic absorption method GB/T 23739-2009 "
The content for measuring soil available Cd is 5.39mg/Kg, and the content of Available Lead is 374mg/Kg.
Embodiment 1
The present embodiment provides one kind to be used for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes bone meal
And oxalic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer,
In being manured into soil jointly, wherein the sowing amount of bone meal is the 1% of soil quality to be repaired, and the sowing amount of oxalic acid is soil to be repaired
The 5% of quality, carrying out 3 depth is turning over for 20cm, and the water content for adjusting soil conserves 7 days, adds during maintenance to 35%
Water keeps the water content of soil, and Available Lead content, the pH value of available Cd content and soil of soil are measured after maintenance.
Measurement result are as follows: the content of soil available Cd has dropped 87.0%, and the content of Available Lead has dropped
84.4%, the pH value of soil is 7.3.
Embodiment 2
The present embodiment provides one kind to be used for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes bone meal
And oxalic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer,
In being manured into soil jointly, wherein the sowing amount of bone meal is the 1% of soil quality to be repaired, and the sowing amount of oxalic acid is earth backing to be repaired
The 1% of loamy texture amount, carrying out 5 depth is turning over for 30cm, and the water content for adjusting soil conserves 7 days, during maintenance to 30%
Add water to keep the water content of soil, the Available Lead content of soil, the pH of available Cd content and soil are measured after maintenance
Value.
Measurement result are as follows: the content of soil available Cd has dropped 37.2%, and the content of Available Lead has dropped
12.3%, the pH value of soil is 7.5.
Embodiment 3
The present embodiment provides one kind to be used for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes bone meal
And oxalic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer,
In being manured into soil jointly, wherein the sowing amount of bone meal is the 0.2% of soil quality to be repaired, and the sowing amount of oxalic acid is to be repaired
The 2% of soil quality, carrying out 10 depth is turning over for 20cm, and the water content for adjusting soil conserves 7 days, maintenance to 18%
Period adds water to keep the water content of soil, and Available Lead content, available Cd content and the soil of soil are measured after maintenance
PH value.
Measurement result are as follows: the content of soil available Cd has dropped 46.6%, and the content of Available Lead has dropped
24.3%, the pH value of soil is 7.4.
Embodiment 4
The present embodiment provides one kind to be used for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes bone meal
And oxalic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer,
In being manured into soil jointly, wherein the sowing amount of bone meal is the 0.5% of soil quality to be repaired, and the sowing amount of oxalic acid is to be repaired
The 1% of soil quality, carrying out 5 depth is turning over for 25cm, and the water content for adjusting soil conserves 7 days, curing period to 25%
Between plus water keep the water content of soil, the Available Lead content of soil, available Cd content and soil are measured after maintenance
PH value.
Measurement result are as follows: the content of soil available Cd has dropped 35.2%, and the content of Available Lead has dropped
15.8%, the pH value of soil is 7.5.
Comparative example 1
The present embodiment provides one kind to be used for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes bone meal
And malic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer
It closes, is manured into soil jointly, wherein the sowing amount of bone meal is the 1% of soil quality to be repaired, and the sowing amount of malic acid is to be repaired
The 5% of multiple soil quality, carrying out 3 depth is turning over for 20cm, and the water content for adjusting soil conserves 7 days, maintenance to 35%
Period adds water to keep the water content of soil, and Available Lead content, available Cd content and the soil of soil are measured after maintenance
PH value.
Measurement result are as follows: the content of soil available Cd increases 34%, and the content of Available Lead increases 49%,
The pH value of soil is 6.32.
Comparative example 2
The present embodiment provides one kind to be used for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes calcium and magnesium
Phosphate fertilizer and oxalic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer
Close, be manured into soil jointly, wherein the sowing amount of calcium magnesium phosphate is the 1% of soil quality to be repaired, the sowing amount of oxalic acid be to
The 5% of rehabilitating soil quality carries out 3 depth and is that 20cm being turned over, and adjusts the water content of soil to 35%, conserves 7 days,
During maintenance plus water keeps the water content of soil, measured after maintenance the Available Lead content of soil, available Cd content and
The pH value of soil.
Measurement result are as follows: the content of soil available Cd has dropped 12%, and the content of Available Lead has dropped 22%,
The pH value of soil is 7.3.
Comparative example 3
Embodiment provides one kind for alkaline heavy metal contaminated soil renovation agent, and the soil-repairing agent includes ground phosphate rock
And silicic acid, and it is used for the reparation of above-mentioned soil sample, application method are as follows: the soil-repairing agent is mixed with fertilizer,
In being manured into soil jointly, wherein the sowing amount of ground phosphate rock is the 1% of soil quality to be repaired, and the sowing amount of silicic acid is earth backing to be repaired
The 5% of loamy texture amount, carrying out 3 depth is turning over for 20cm, and the water content for adjusting soil conserves 7 days, during maintenance to 35%
Add water to keep the water content of soil, the Available Lead content of soil, the pH of available Cd content and soil are measured after maintenance
Value.
Measurement result are as follows: the content of soil available Cd increases 17%, and the content of Available Lead increases 49%,
The pH value of soil is 7.5.
From embodiment 1-4 and comparative example 1-3 measurement result: when bone meal and oxalic acid are as soil-repairing agent compatible use
When, the content of the available Cd and lead in alkaline heavy metal contaminated soil can be made to significantly reduce, and influence on the pH value of soil
Very little；When bone meal and other kinds of sour compatible use, other kinds of phosphate and oxalic acid compatible use or other kinds of
When phosphate and other kinds of sour compatible use, it cannot all make containing for the available Cd and lead in alkaline heavy metal contaminated soil
Amount significantly reduces, or increases instead.
The Applicant declares that the present invention is explained by the above embodiments of the invention is used for alkaline heavy metal contaminated soil
Renovation agent and its application method and application, but the present invention is not limited to the above embodiments do not mean that the present invention must be according to
Bad above-described embodiment could be implemented.It should be clear to those skilled in the art, any improvement in the present invention, to this hair
The equivalence replacement of bright each raw material of product and addition, the selection of concrete mode of auxiliary element etc., all fall within protection model of the invention
Enclose within the open scope.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
Claims (10)
1. one kind be used for alkaline heavy metal contaminated soil renovation agent, which is characterized in that the soil-repairing agent include bone meal and
Oxalic acid.
2. soil-repairing agent as described in claim 1, which is characterized in that the pH value of the bone meal is 7.0-7.5.
3. soil-repairing agent as claimed in claim 1 or 2, which is characterized in that the phosphorus content of the bone meal is 10-20%.
4. soil-repairing agent as claimed in any one of claims 1-3, which is characterized in that the partial size of the bone meal is 0.2-
3mm。
5. the application method of soil-repairing agent as described in any one of claim 1-4, which is characterized in that the method are as follows: will
Soil-repairing agent is mixed with fertilizer, is manured into soil jointly, is turned over, and adjust the water content of soil.
6. application method as claimed in claim 5, which is characterized in that the sowing amount of bone meal is to be repaired in the soil-repairing agent
The 0.2-1% of multiple soil quality.
7. application method as claimed in claim 5, which is characterized in that the sowing amount of the soil-repairing agent mesoxalic acid is to be repaired
The 0.5-5% of multiple soil quality.
8. the application method as described in any one of claim 5-7, which is characterized in that the depth turned over is 20-50cm,
The number turned over is 2-10 times.
9. the application method as described in any one of claim 5-8, which is characterized in that the water content for adjusting soil is to adjust
The water content of soil is saved to 18-35%.
10. soil-repairing agent is repairing the application in alkaline heavy metal contaminated soil as described in any one of claim 1-4；
Preferably, the heavy metal pollution is cadmium pollution；
Preferably, the heavy metal pollution is lead cadmium combined pollution.
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| CN201811416217.5A CN109513740A (en) | 2018-11-26 | 2018-11-26 | One kind is for alkaline heavy metal contaminated soil renovation agent and its application method and application |
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| CN112159663A (en) * | 2020-10-14 | 2021-01-01 | 东南大学 | Activation method for improving heavy metal solidifying effect and fertility of bone meal material |
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Effective date of registration: 20191223 Address after: 518000 Guangdong city of Shenzhen province Nanshan District Taoyuan Xueyuan Road 1088 Street Applicant after: Shenzhen Nanke big asset management limited company Applicant after: Hu Qing Address before: 100083 Beijing city Haidian District Wangzhuang Road No. 1, Tsinghua Tongfang technology building D, East Building 28 storey Applicant before: BEIJING NANKEDA BLUE TECHNOLOGY CO., LTD. Applicant before: Hu Qing |
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Application publication date: 20190326 |
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