CN110591726A - Conditioner for farmland heavy metal pollution remediation - Google Patents
Conditioner for farmland heavy metal pollution remediation Download PDFInfo
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- CN110591726A CN110591726A CN201910968167.XA CN201910968167A CN110591726A CN 110591726 A CN110591726 A CN 110591726A CN 201910968167 A CN201910968167 A CN 201910968167A CN 110591726 A CN110591726 A CN 110591726A
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- Prior art keywords
- conditioner
- equal
- soil
- heavy metal
- metal pollution
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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
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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
-
- 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
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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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- 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
-
- 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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Abstract
The invention discloses a conditioner for farmland heavy metal pollution remediation, which comprises a soil conditioner, wherein the soil conditioner is compounded from the specific components of modified attapulgite, organic matters, sulfur-based materials, potassium phosphate and calcium-based mineral materials; the product can effectively improve the pH value of soil, improve activated soil, strengthen a soil granular structure, improve permeability, water storage and fertilizer retention capacity and improve the ecological environment of the soil, can generate adsorption, oxidation reduction, antagonism or precipitation effects on heavy metal ions in the soil, can reduce the bioavailability of heavy metals, can stimulate the propagation of microorganisms by organic matters in the product, improves the number of beneficial microbial floras in the soil, and is beneficial to the growth of crops.
Description
Technical Field
The invention belongs to the field of conditioners for farmland heavy metal pollution remediation, and particularly relates to a conditioner for farmland heavy metal pollution remediation.
Background
Soil is a basic environmental element in an ecological service system and is a material basis for production and life of human beings. With the rapid development of industrialization, urbanization and high agricultural intensification in Nanjing, the degradation situation of the soil environment quality in Nanjing is severe day by day, the overall situation of soil pollution is not optimistic, and the cadmium pollution of the soil in part of areas is serious. Cadmium has great environmental hazard, cadmium pollution in soil has accumulative property and difficult elimination property, and the hazard of cadmium is difficult to eliminate by the purification of soil and the natural attenuation process of cadmium
The existing conditioner for restoring heavy metal pollution of farmlands still has some defects in practical application: the high-efficiency and cheap synchronous passivator for heavy metal pollution is lacked, so that on one hand, the cost of the farmland heavy metal passivator sold in the market at present is high; on the other hand, the soil fertility is possibly reduced due to long-term application of the passivator to the soil, and a passivation product which has the functions of passivating the cadmium activity of the soil and improving the soil fertility is lacked in the current market; the prevention and treatment research aiming at the actual situation of the agricultural product base is lacked, the cadmium pollution remediation work of the soil is developed in part of the agricultural product base, but the remediation cost is higher, and the acceptance degree of farmers is low; in addition, research is mostly focused on a single prevention and control technology, but the prevention and control effect of heavy metal pollution in agricultural product bases is obviously influenced by agricultural measures (dry-wet alternation process, fertilizer types and farming system), in addition, heavy metal pollution is difficult to control, the period is long, heavy metal toxicity is high, and the heavy metal pollution is easy to accumulate in a food chain, and the current soil heavy metal pollution already poses serious threats to crop yield, agricultural product safety, ecological safety, human living environment and sustainable development of regional economy and society.
Disclosure of Invention
The invention aims to provide a conditioner for restoring heavy metal pollution of farmlands, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a conditioner for farmland heavy metal pollution remediation comprises a soil conditioner, the concrete components of the soil conditioner are compounded by modified attapulgite, organic matters, sulfur-based materials, potassium phosphate and calcium-based mineral materials, and the preparation process of the soil conditioner comprises the following steps:
the method comprises the following steps: taking out the modified attapulgite, the organic matter, the sulfur-based material, the potassium phosphate and the calcium-based mineral material according to the proportion and placing;
step two: mixing and stirring the materials in the step one for five to ten minutes, and taking out;
step three: putting the taken material into a closed reaction kettle, introducing steam, pressurizing to 10 atmospheric pressures, and performing steam curing and activation treatment for 6-20 hours at the temperature of 130-250 ℃.
Preferably, the moisture content of the modified attapulgite is less than or equal to 15 percent, and the silicon content of the modified attapulgite is more than or equal to 15 percent.
Preferably, the ratio of the organic matter particle size smaller than 2mm is more than or equal to 98%.
Preferably, the sulfur element in the sulfur-based material is more than or equal to 5 percent.
Preferably, the content of the potassium phosphate is more than or equal to 10 percent.
Preferably, the content of calcium in the calcium-based mineral is more than or equal to 25 percent.
Preferably, the total pH of the soil conditioner is in the range of 9-11.
Preferably, the limit values of harmful substances used by the soil conditioner are Cd mg/kg is less than or equal to 3, Pb mg/kg is less than or equal to 50, As mg/kg is less than or equal to 10, Cr mg/kg is less than or equal to 50 and Hg mg/kg is less than or equal to 10.
Compared with the prior art, the invention has the beneficial effects that: the product can effectively improve the pH value of soil, improve activated soil, strengthen a soil granular structure, improve permeability, water storage and fertilizer retention capacity and improve the ecological environment of the soil, can generate adsorption, oxidation reduction, antagonism or precipitation effects on heavy metal ions in the soil, can reduce the bioavailability of heavy metals, can stimulate the reproduction of microorganisms by organic matters in the product, improve the number of beneficial microorganism flora in the soil, is beneficial to the growth of crops, can provide medium trace elements for mineral materials in the product, promotes the rapid development of plant roots, enhances the resistance of the crops, increases the yield and income, is light gray solid powder, and is convenient, safe and environment-friendly to broadcast.
Detailed Description
Example 1
The invention provides a technical scheme that: a conditioner for farmland heavy metal pollution remediation comprises a soil conditioner, the concrete components of the soil conditioner are compounded by modified attapulgite, organic matters, sulfur-based materials, potassium phosphate and calcium-based mineral materials, and the preparation process of the soil conditioner comprises the following steps:
the method comprises the following steps: taking out the modified attapulgite, the organic matter, the sulfur-based material, the potassium phosphate and the calcium-based mineral material according to the proportion and placing;
step two: mixing and stirring the materials in the step one for five to ten minutes, and taking out;
step three: and (3) putting the taken-out material into a closed reaction kettle, introducing steam, pressurizing to 10 atmospheric pressures, and performing steam curing and activating treatment for 6 hours at the temperature of 130 ℃.
In the embodiment, preferably, the moisture content of the modified attapulgite is less than or equal to 15 percent, and the silicon content of the modified attapulgite is more than or equal to 15 percent.
In this embodiment, the ratio of the organic matter particle size of less than 2mm is preferably not less than 98%.
In this embodiment, it is preferable that the elemental sulfur in the sulfur-based material is 5% or more.
In this example, the potassium phosphate content is preferably not less than 10%.
In this embodiment, the calcium-based mineral preferably has a calcium content of 25% or more.
In this embodiment, the total pH of the soil conditioner is preferably in the range of 9.
In the embodiment, the limit values of harmful substances used by the soil conditioner are preferably Cd mg/kg less than or equal to 3, Pb mg/kg less than or equal to 50, As mg/kg less than or equal to 10, Cr mg/kg less than or equal to 50 and Hg mg/kg less than or equal to 10.
Example 2
The invention provides a technical scheme that: a conditioner for farmland heavy metal pollution remediation comprises a soil conditioner, the concrete components of the soil conditioner are compounded by modified attapulgite, organic matters, sulfur-based materials, potassium phosphate and calcium-based mineral materials, and the preparation process of the soil conditioner comprises the following steps:
the method comprises the following steps: taking out the modified attapulgite, the organic matter, the sulfur-based material, the potassium phosphate and the calcium-based mineral material according to the proportion and placing;
step two: mixing and stirring the materials in the step one for five to ten minutes, and taking out;
step three: and (3) putting the taken-out material into a closed reaction kettle, introducing steam, pressurizing to 10 atmospheric pressures, performing steam curing and activating treatment for 8 hours, and controlling the temperature at 200 ℃.
In the embodiment, preferably, the moisture content of the modified attapulgite is less than or equal to 15 percent, and the silicon content of the modified attapulgite is more than or equal to 15 percent.
In this embodiment, the ratio of the organic matter particle size of less than 2mm is preferably not less than 98%.
In this embodiment, it is preferable that the elemental sulfur in the sulfur-based material is 5% or more.
In this example, the potassium phosphate content is preferably not less than 10%.
In this embodiment, the calcium-based mineral preferably has a calcium content of 25% or more.
In this embodiment, the total pH of the soil conditioner is preferably in the range of 10.
In the embodiment, the limit values of harmful substances used by the soil conditioner are preferably Cd mg/kg less than or equal to 3, Pb mg/kg less than or equal to 50, As mg/kg less than or equal to 10, Cr mg/kg less than or equal to 50 and Hg mg/kg less than or equal to 10.
Example 3
The invention provides a technical scheme that: a conditioner for farmland heavy metal pollution remediation comprises a soil conditioner, the concrete components of the soil conditioner are compounded by modified attapulgite, organic matters, sulfur-based materials, potassium phosphate and calcium-based mineral materials, and the preparation process of the soil conditioner comprises the following steps:
the method comprises the following steps: taking out the modified attapulgite, the organic matter, the sulfur-based material, the potassium phosphate and the calcium-based mineral material according to the proportion and placing;
step two: mixing and stirring the materials in the step one for five to ten minutes, and taking out;
step three: and (3) putting the taken material into a closed reaction kettle, introducing steam, pressurizing to 10 atmospheric pressures, performing steam curing and activating treatment for 20 hours, and controlling the temperature at 250 ℃.
In the embodiment, preferably, the moisture content of the modified attapulgite is less than or equal to 15 percent, and the silicon content of the modified attapulgite is more than or equal to 15 percent.
In this embodiment, the ratio of the organic matter particle size of less than 2mm is preferably not less than 98%.
In this embodiment, it is preferable that the elemental sulfur in the sulfur-based material is 5% or more.
In this example, the potassium phosphate content is preferably not less than 10%.
In this embodiment, the calcium-based mineral preferably has a calcium content of 25% or more.
In this embodiment, the total pH of the soil conditioner is preferably in the range of 11.
In the embodiment, the limit values of harmful substances used by the soil conditioner are preferably Cd mg/kg less than or equal to 3, Pb mg/kg less than or equal to 50, As mg/kg less than or equal to 10, Cr mg/kg less than or equal to 50 and Hg mg/kg less than or equal to 10.
When the fertilizer is used, the application amount needs to be determined according to the pollution degree of soil and the characteristics of crops, 100-300 kilograms per mu are recommended, the fertilizer is uniformly spread and stored in a cool and dry storehouse, and the following cautions are taken in use:
a. the direct mixing with bactericide and nitrogenous fertilizer is forbidden;
b. the product can not be directly contacted with the rhizosphere of the seeds or the transplanted seedlings;
c. irrigating and watering in time after the application of the dry soil area;
d. the application amount of different crops in different areas is recommended to be controlled according to local conditions, or the application amount is determined according to the guidance of agricultural technicians;
e. should be protected from the sun, rain or moisture, and stored in a cool, ventilated and dry place.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A conditioner for farmland heavy metal pollution remediation comprises a soil conditioner and is characterized in that: the soil conditioner is prepared by compounding modified attapulgite, organic matters, sulfur-based materials, potassium phosphate and calcium-based mineral materials, and the preparation process of the soil conditioner comprises the following steps:
the method comprises the following steps: taking out the modified attapulgite, the organic matter, the sulfur-based material, the potassium phosphate and the calcium-based mineral material according to the proportion and placing;
step two: mixing and stirring the materials in the step one for five to ten minutes, and taking out;
step three: putting the taken material into a closed reaction kettle, introducing steam, pressurizing to 10 atmospheric pressures, and performing steam curing and activation treatment for 6-20 hours at the temperature of 130-250 ℃.
2. The conditioner for restoring heavy metal pollution to farmland according to claim 1, which is characterized in that: the water content of the modified attapulgite is less than or equal to 15 percent, and the silicon content of the modified attapulgite is more than or equal to 15 percent.
3. The conditioner for restoring heavy metal pollution to farmland according to claim 1, which is characterized in that: the proportion of the organic matter with the grain diameter smaller than 2mm is more than or equal to 98 percent.
4. The conditioner for restoring heavy metal pollution to farmland according to claim 1, which is characterized in that: the sulfur element in the sulfur-based material is more than or equal to 5 percent.
5. The conditioner for restoring heavy metal pollution to farmland according to claim 1, which is characterized in that: the content of the potassium phosphate is more than or equal to 10 percent.
6. The conditioner for restoring heavy metal pollution to farmland according to claim 1, which is characterized in that: the content of calcium in the calcium-based mineral is more than or equal to 25 percent.
7. The conditioner for restoring heavy metal pollution to farmland according to claims 2-6, which is characterized in that: the total pH value of the soil conditioner is in the range of 9-11.
8. The conditioner for restoring heavy metal pollution to farmland according to claim 1, which is characterized in that: the limiting values of harmful substances used by the soil conditioner are Cd mg/kg less than or equal to 3, Pb mg/kg less than or equal to 50, As mg/kg less than or equal to 10, Cr mg/kg less than or equal to 50 and Hg mg/kg less than or equal to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968167.XA CN110591726A (en) | 2019-10-12 | 2019-10-12 | Conditioner for farmland heavy metal pollution remediation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968167.XA CN110591726A (en) | 2019-10-12 | 2019-10-12 | Conditioner for farmland heavy metal pollution remediation |
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| Publication Number | Publication Date |
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| CN110591726A true CN110591726A (en) | 2019-12-20 |
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| CN201910968167.XA Pending CN110591726A (en) | 2019-10-12 | 2019-10-12 | Conditioner for farmland heavy metal pollution remediation |
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Citations (7)
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|---|---|---|---|---|
| US20110116872A1 (en) * | 2009-11-13 | 2011-05-19 | Restoration Products, LLC | Composition and method for remediation of heavy metal contaminated substances |
| CN102766465A (en) * | 2012-07-31 | 2012-11-07 | 湖南永清环境修复有限公司 | Ion mineralization stabilizer for treating soil with heavy metal pollution and application method thereof |
| CN104560049A (en) * | 2015-02-09 | 2015-04-29 | 湖南神隆超级稻丰产工程有限公司 | Soil heavy metal repairing agent |
| CN106520128A (en) * | 2016-10-19 | 2017-03-22 | 北京德瑞科森环保科技有限公司 | A stabilizing agent used for restoration of cadmium-polluted soil |
| CN106748494A (en) * | 2016-12-28 | 2017-05-31 | 贵州大学 | A kind of organic matter has both the repairing fertiliser of heavy-metal contaminated soil |
| CN107603631A (en) * | 2017-08-23 | 2018-01-19 | 侯玉德 | A kind of lead-contaminated soil curing agent and preparation method thereof |
| CN108998042A (en) * | 2018-06-22 | 2018-12-14 | 武汉市秀谷科技有限公司 | Farmland soil heavy metals contaminated soil conditioner and preparation method thereof is repaired in passivation |
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2019
- 2019-10-12 CN CN201910968167.XA patent/CN110591726A/en active Pending
Patent Citations (7)
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| US20110116872A1 (en) * | 2009-11-13 | 2011-05-19 | Restoration Products, LLC | Composition and method for remediation of heavy metal contaminated substances |
| CN102766465A (en) * | 2012-07-31 | 2012-11-07 | 湖南永清环境修复有限公司 | Ion mineralization stabilizer for treating soil with heavy metal pollution and application method thereof |
| CN104560049A (en) * | 2015-02-09 | 2015-04-29 | 湖南神隆超级稻丰产工程有限公司 | Soil heavy metal repairing agent |
| CN106520128A (en) * | 2016-10-19 | 2017-03-22 | 北京德瑞科森环保科技有限公司 | A stabilizing agent used for restoration of cadmium-polluted soil |
| CN106748494A (en) * | 2016-12-28 | 2017-05-31 | 贵州大学 | A kind of organic matter has both the repairing fertiliser of heavy-metal contaminated soil |
| CN107603631A (en) * | 2017-08-23 | 2018-01-19 | 侯玉德 | A kind of lead-contaminated soil curing agent and preparation method thereof |
| CN108998042A (en) * | 2018-06-22 | 2018-12-14 | 武汉市秀谷科技有限公司 | Farmland soil heavy metals contaminated soil conditioner and preparation method thereof is repaired in passivation |
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Application publication date: 20191220 |
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