CN111085540A - Novel material capable of separating soil pollutants and preparation process thereof - Google Patents
Novel material capable of separating soil pollutants and preparation process thereof Download PDFInfo
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- CN111085540A CN111085540A CN201911318596.9A CN201911318596A CN111085540A CN 111085540 A CN111085540 A CN 111085540A CN 201911318596 A CN201911318596 A CN 201911318596A CN 111085540 A CN111085540 A CN 111085540A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
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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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- 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
Abstract
A new material for separating soil pollutants is composed of ferromagnetic material, porous carbon and clay. The invention has the beneficial effects that: the prepared new material capable of separating soil pollutants is put into polluted soil, can effectively adsorb pollutants in the soil, particularly heavy metal ions and pesticide residues, has the capacity of inducing magnetism, can be separated from the soil by utilizing the magnetic attraction force, is recovered in a centralized manner, and simultaneously carries the pollutants out of the soil, so that the pollutants in the soil are separated from the original soil along with the adsorption material, and the purposes of separating and radically treating the pollutants are achieved.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a new material capable of separating soil pollutants and a preparation process thereof.
Background
At present, humans face three major pollutions: air pollution, water pollution and food pollution. The food pollution is mainly caused by the migration of pollutants in soil, and is caused by the pollution in the processes of seed culture, food processing, storage and transportation. Among them, contamination of soil has seriously threatened food safety and economic sustainability. Therefore, it is important to treat and restore soil and remove pollutants from soil.
The soil pollution includes inorganic pollution, organic pollution and biological pollution, such as heavy metal pollution, pesticide residue and harmful organic pollution. Some of them are from nature and some are from human production and life. During the growth of plants, they migrate more or less into the food, causing harm to humans.
According to the national mandatory standard of management and control standard (trial) of soil pollution risks of agricultural land for soil environmental quality (GB15618-2018), the basic screening items of the soil pollution risks of the agricultural land comprise: lead, mercury, cadmium, chromium, arsenic, copper, nickel and zinc, and the selected items comprise: hexachloro cyclohexane, dichlorodiphenyl trichloroethane and benzopyrene; the agricultural land soil pollution risk control project comprises: lead, mercury, cadmium, chromium and arsenic. When the soil pollution of the agricultural land exceeds the control value, the agricultural land is no longer suitable for planting food. At the moment, the soil is required to be treated and repaired to meet the requirement of soil pollution control.
In recent years, porous materials (plant carbon, zeolite and the like) are added into soil for adsorption, which is a good method, but the porous materials are left in the soil, so that adsorbates are difficult to be desorbed under certain conditions, and the soil is polluted again; meanwhile, the porous material also has the problems of pore channel blockage and adsorption saturation; in addition, there must be competition between the absorption of the plant to the contaminants and the adsorption of the porous material to the contaminants, so the problem has not been solved completely.
Disclosure of Invention
The invention aims to solve the problem of soil pollution treatment and provides a new material capable of separating soil pollutants and a preparation process thereof.
The invention adopts the technical scheme for solving the technical problems that: the new material capable of separating soil pollutants is prepared from the following raw materials in parts by weight: 1-20 parts of ferromagnetic material, 10-70 parts of porous carbon and 10-89 parts of clay.
The new material capable of separating soil pollutants is prepared from the following raw materials in parts by weight: 10 parts of ferromagnetic material, 50 parts of porous carbon and 40 parts of clay.
The preparation process of the new material capable of separating the soil pollutants comprises the following steps:
step one, mixing, namely stirring and uniformly mixing a ferromagnetic material, porous carbon and clay to obtain a mixture:
secondly, granulating, namely granulating the mixture by adopting a granulator, wherein the particle size of the granules is 1-10 mm, and obtaining granules after granulation;
thirdly, drying, namely drying the particles in an airing or drying mode, wherein the water content of the particles is less than 15%;
and fourthly, high-temperature oxygen-isolated firing, namely placing the particles into a kiln to perform oxygen-isolated firing at the temperature of 400-1200 ℃ for 0.5-12 hours to obtain the carbon-containing granular adsorption new material capable of inducing magnetism after firing.
In the novel material capable of separating soil pollutants, the ferromagnetic material adopts ferromagnetic material particles or ferromagnetic material powder without magnetism, and any one or any combination of ferrite, iron and stainless iron is adopted.
In the new material for separating soil pollutants, the porous carbon adopts porous carbon particles or porous carbon powder and adopts any one or any combination of biological carbon, coal and active carbon.
In the new material for separating soil pollutants, clay is clay powder.
The new material is prepared by mixing and firing a ferromagnetic material, porous carbon and clay, has the capacity of inducing magnetism, does not carry the magnetism, can be conveniently dispersed into soil, has the adsorption capacity, adsorbs pollutants in the soil, particularly heavy metal ions and pesticide residues, has magnetism including soft magnetism and hard magnetism under the action of an external magnetic field, can be separated from the soil by using magnetic attraction only by using magnetic induction equipment, is intensively recovered, and simultaneously carries the pollutants out of the soil, so that the pollutants in the soil are separated from the original soil along with the adsorption material, and the purposes of separating and radically treating the pollution are achieved.
The invention has the beneficial effects that: the new material capable of separating the soil pollutants and the preparation process thereof have the following advantages:
firstly, the fertilizer is put into polluted soil, and can effectively adsorb pollutants in the soil, particularly heavy metal ions and pesticide residues;
the magnetic material has the capacity of inducing magnetism, but does not have magnetism, and only under the action of an external magnetic field, the magnetic material has magnetism, including soft magnetism and hard magnetism.
Detailed Description
The invention is further illustrated below:
the first embodiment is as follows:
the new material capable of separating soil pollutants is prepared from the following raw materials in parts by weight: 1 part of ferromagnetic material, 10 parts of porous carbon and 10 parts of clay.
The preparation process of the new material capable of separating the soil pollutants comprises the following steps:
step one, mixing, namely stirring and uniformly mixing a ferromagnetic material, porous carbon and clay to obtain a mixture:
secondly, granulating, namely granulating the mixture by adopting a granulator, wherein the particle size of the granules is 1mm, and obtaining granules after granulation;
thirdly, drying, namely drying the particles in an airing or drying mode, wherein the water content of the particles is less than 15%;
and fourthly, high-temperature oxygen-isolated firing, namely placing the particles into a kiln to perform oxygen-isolated firing at the firing temperature of 400 ℃ for 5 hours to obtain the novel carbon-containing granular adsorption material capable of inducing magnetism.
In the novel material capable of separating soil pollutants, the ferromagnetic material adopts ferromagnetic material particles without magnetism, and ferrite particles are adopted.
In the new material capable of separating soil pollutants, porous carbon adopts porous carbon particles and biological carbon particles.
In the new material for separating soil pollutants, clay is clay powder.
Example two:
the new material capable of separating soil pollutants is prepared from the following raw materials in parts by weight: 12 parts of ferromagnetic material, 45 parts of porous carbon and 62 parts of clay.
The preparation process of the new material capable of separating the soil pollutants comprises the following steps:
step one, mixing, namely stirring and uniformly mixing a ferromagnetic material, porous carbon and clay to obtain a mixture:
secondly, granulating, namely granulating the mixture by adopting a granulator, wherein the particle size of the granules is 6mm, and obtaining granules after granulation;
thirdly, drying, namely drying the particles in an airing or drying mode, wherein the water content of the particles is less than 15%;
and fourthly, high-temperature oxygen-isolated firing, namely placing the particles into a kiln to perform oxygen-isolated firing at the firing temperature of 800 ℃ for 6 hours to obtain the carbon-containing granular adsorption new material capable of inducing magnetism after firing.
In the novel material capable of separating soil pollutants, the ferromagnetic material adopts ferromagnetic material particles without magnetism, and adopts iron particles.
In the new material capable of separating soil pollutants, porous carbon adopts porous carbon particles and coal particles.
In the new material for separating soil pollutants, clay is clay powder.
Example three:
the new material capable of separating soil pollutants is prepared from the following raw materials in parts by weight: 20 parts of ferromagnetic material, 70 parts of porous carbon and 89 parts of clay.
The preparation process of the new material capable of separating the soil pollutants comprises the following steps:
step one, mixing, namely stirring and uniformly mixing a ferromagnetic material, porous carbon and clay to obtain a mixture:
secondly, granulating, namely granulating the mixture by adopting a granulator, wherein the particle size of the granules is 10mm, and obtaining granules after granulation;
thirdly, drying, namely drying the particles in an airing or drying mode, wherein the water content of the particles is less than 15%;
and fourthly, high-temperature oxygen-isolated firing, namely placing the particles into a kiln to perform oxygen-isolated firing at the temperature of 1200 ℃ for 7 hours to obtain the novel carbon-containing granular adsorption material capable of inducing magnetism.
In the novel material capable of separating soil pollutants, the ferromagnetic material adopts ferromagnetic material powder without magnetism, and adopts stainless iron powder.
In the new material capable of separating soil pollutants, the porous carbon adopts porous carbon powder and adopts activated carbon powder.
In the new material for separating soil pollutants, clay is clay powder.
In the examples of the present invention, 1 part was 1 kg.
The new materials of the first embodiment, the second embodiment and the third embodiment of the invention are put into soil for separating pollutants, and the soil with the heavy metal ions as 1 unit and the pesticide residue as 1 unit and the standard exceeding pollution is taken as an example, and the implementation results are as follows:
from the above table, the new material of the embodiment of the invention can sufficiently and effectively adsorb pollutants in soil.
The embodiment of the invention has the characteristics that: the mixed high-efficiency adsorption material is put into the polluted soil, and the adsorption material is recovered after the full adsorption, so that the pollutants in the soil are separated from the original soil along with the adsorption material, and the purposes of separating and radically treating the pollution are achieved.
Although the present invention has been described with reference to preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the scope of the claims.
Claims (6)
1. A new material capable of separating soil pollutants is characterized by being prepared from the following raw materials in parts by weight: 1-20 parts of ferromagnetic material, 10-70 parts of porous carbon and 10-89 parts of clay.
2. The new material capable of separating soil pollutants as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 10 parts of ferromagnetic material, 50 parts of porous carbon and 40 parts of clay.
3. The process for preparing a new material for separating soil contaminants according to claim 1 or 2, comprising the steps of:
(1) mixing: stirring and mixing the ferromagnetic material, the porous carbon and the clay uniformly to obtain a mixture:
(2) and (3) granulating: granulating the mixture by a granulator to obtain granules with the particle size of 1-10 mm;
(3) and (3) drying: drying the granules in a drying or baking mode, wherein the water content of the granules is less than 15%;
(4) high-temperature oxygen-insulating firing: the particles are put into a kiln to be sintered in the presence of oxygen at the temperature of 400-1200 ℃ for 0.5-12 hours, and the carbon-containing granular adsorption new material capable of inducing magnetism is obtained after sintering.
4. The new material for soil contaminant separation according to claim 1, wherein: the ferromagnetic material adopts ferromagnetic material particles or ferromagnetic material powder, and adopts any one or any combination of ferrite, iron and stainless iron.
5. The new material for soil contaminant separation according to claim 1, wherein: the porous carbon adopts porous carbon particles or porous carbon powder, and adopts any one or any combination of biological carbon, coal and active carbon.
6. The new material for soil contaminant separation according to claim 1, wherein: the clay is clay powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911318596.9A CN111085540A (en) | 2019-12-19 | 2019-12-19 | Novel material capable of separating soil pollutants and preparation process thereof |
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| CN201911318596.9A CN111085540A (en) | 2019-12-19 | 2019-12-19 | Novel material capable of separating soil pollutants and preparation process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662728A (en) * | 2020-07-29 | 2020-09-15 | 杨凌职业技术学院 | Walnut branch biochar-based fertilizer soil remediation agent and preparation method and application thereof |
| CN112138632A (en) * | 2020-08-21 | 2020-12-29 | 浙江碧岩环保科技有限公司 | Water float carbon and method for separating soil heavy metal by using same |
| CN113398884A (en) * | 2021-06-17 | 2021-09-17 | 遂昌高净界净化科技有限公司 | Floating adsorbent and its proportioning metering method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662728A (en) * | 2020-07-29 | 2020-09-15 | 杨凌职业技术学院 | Walnut branch biochar-based fertilizer soil remediation agent and preparation method and application thereof |
| CN111662728B (en) * | 2020-07-29 | 2021-12-21 | 杨凌职业技术学院 | Walnut branch biochar-based fertilizer soil remediation agent and preparation method and application thereof |
| CN112138632A (en) * | 2020-08-21 | 2020-12-29 | 浙江碧岩环保科技有限公司 | Water float carbon and method for separating soil heavy metal by using same |
| CN112138632B (en) * | 2020-08-21 | 2023-10-13 | 遂昌高净界净化科技有限公司 | Method for separating soil heavy metals by water floating carbon |
| CN113398884A (en) * | 2021-06-17 | 2021-09-17 | 遂昌高净界净化科技有限公司 | Floating adsorbent and its proportioning metering method |
| CN113398884B (en) * | 2021-06-17 | 2024-01-16 | 遂昌高净界净化科技有限公司 | Floating adsorbent and proportioning and metering method thereof |
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Effective date of registration: 20210607 Address after: 323300 No.18 Tanyuan Road, miaogao street, Suichang County, Lishui City, Zhejiang Province Applicant after: Suichang gaojingjie Purification Technology Co.,Ltd. Address before: 323300 No. 12 Carbon Margin Road, Miaogao Street, Suichang County, Lishui City, Zhejiang Province Applicant before: Zhejiang Biyan Environmental Protection Technology Co.,Ltd. |
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