CN112457864A - Repairing agent for repairing heavy metal contaminated soil and preparation method thereof - Google Patents
Repairing agent for repairing heavy metal contaminated soil and preparation method thereof Download PDFInfo
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- CN112457864A CN112457864A CN202011574705.6A CN202011574705A CN112457864A CN 112457864 A CN112457864 A CN 112457864A CN 202011574705 A CN202011574705 A CN 202011574705A CN 112457864 A CN112457864 A CN 112457864A
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
- A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
- A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
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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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pest Control & Pesticides (AREA)
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Abstract
The invention discloses a repairing agent for repairing heavy metal contaminated soil and a preparation method thereof, wherein a soil repairing agent is prepared by mixing a compound of biochar and chitosan, diatomite, plant ash, zeolite and starch in proportion, the soil repairing agent is added into the heavy metal contaminated soil in proportion according to the contamination degree, and the heavy metal forms a stable chemical form by the synergistic effects of adsorption, ion exchange, chelation and the like to react with the heavy metal in the soil, so that the environmental migration and diffusion of the heavy metal are prevented, and the toxic degree of the heavy metal in the environment is reduced. The soil remediation agent has the advantages of natural sources, no damage to the physicochemical properties of soil and good treatment effect, can effectively treat the polluted soil, and is suitable for large-scale popularization and application.
Description
Technical Field
The invention belongs to the field of soil remediation, and particularly relates to a remediation agent for remediating heavy metal contaminated soil, which is prepared from a composite material of biochar and chitosan.
Background
With the rapid development of economy and the rapid increase in the population of the world, energy development, industrial construction and urbanization progress are also progressing at an alarming rate. Global industrialization has resulted in the discharge of a large amount of pollutants including heavy metals into the environment, and it is statistically estimated that, in the past 50 years, heavy metals discharged into the environment globally have reached as much as 22000t of cadmium, 939000t of copper, 783000t of lead and 135000t of zinc, and a considerable portion of them have been directly or indirectly introduced into the soil environment, thereby causing the soil environment to be contaminated with heavy metals. Heavy metal pollution has the characteristics of concealment, long-term property and irreversibility, is difficult to degrade and easy to accumulate in the soil environment, has high toxicity, and is an important pollutant affecting the safety of a soil ecosystem. Therefore, the remediation of the heavy metal contaminated soil and the restoration of the original functions of the soil are always difficult points and key points of the research in the fields of agriculture, ecology and environmental science internationally. The U.S. authorities have listed remediation of heavy metal contaminated soils as one of the ten major goals of the twenty-first century.
Heavy metals are significantly toxic and are not degraded by microorganisms, and thus accumulate in the food chain, posing a serious threat to humans. The pollution of heavy metal mercury can cause nephritis, uremia and the like; lead pollution can injure brain cells of a human body, influence the normal development of children intelligence and cause blood diseases, and when the mass of lead in a human body reaches a certain proportion, a series of symptoms including headache, memory deterioration, abdominal pain and the like can be caused; cadmium is one of heavy metal elements with the strongest toxicity to plants, animals and human beings in the environment, and the cadmium entering the human body can be continuously accumulated in the liver and the kidney, and can generate toxic action on the health of the human body after exceeding a certain concentration, and the cadmium mainly shows that osteoporosis, the damage to the kidney, the canceration of the body and even the damage to the reproductive development function of the human body to different degrees are caused. In addition, the ecological impact of heavy metals is also great. The increase of the heavy metal content in the soil can cause the physicochemical property and the soil structure of the soil to be changed, so that the number of soil microorganisms is reduced, the content of the soil N, P, K is also influenced, and finally the fertility of the soil is reduced. So that the yield and quality of the crops are reduced.
The existing soil remediation method has a series of problems of overhigh regulation and control technical cost, secondary pollution, damage to soil physicochemical properties and the like, so that researches and developments of a conditioner which is low in cost, natural in source and capable of more quickly and effectively remedying soil on the basis of not damaging the soil structure are urgently needed. Chitosan is a deacetylated product of chitin, is very rich in nature, is the second most natural organic compound next to cellulose, and has good biocompatibility and biodegradability. It contains a large amount of active groups such as amino, hydroxyl and the like, and can be chelated with heavy metal ions to generate adsorption. The biochar has larger specific surface area and porosity, is a good adsorption material with environmental benefit, and plays an increasingly important role in the fields of agriculture, ecological restoration and environmental protection due to the functions of increasing carbon sink, improving soil, restoring environmental pollution and the like. Meanwhile, the surface of the biomass charcoal contains rich oxygen-containing functional groups such as-COOH, -COH and-OH, and the oxygen-containing functional groups can form specific metal complexes with metal ions through the coordination effect, so that the heavy metal ions are fixed in the soil. The low-cost adsorbent with better adsorption effect on heavy metals can be prepared by combining the biochar and the chitosan, can react with pollutants in soil more quickly and efficiently, greatly improves the adsorption capacity of a single material, increases the adsorption quantity, and has wide application prospect.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a repairing agent for repairing heavy metal contaminated soil and a preparation method thereof, the repairing agent is prepared by mixing a compound of biochar and chitosan, diatomite, plant ash, zeolite and starch in proportion, is added into the heavy metal contaminated soil in proportion according to the pollution degree, and reacts with the heavy metal in the soil through synergistic effects of adsorption, ion exchange, chelation and the like, so that the heavy metal forms a stable chemical form, the environmental migration and diffusion of the heavy metal are prevented, and the toxic degree of the heavy metal in the environment is reduced.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the heavy metal contaminated soil remediation agent comprises the following raw materials in percentage by weight:
40-60% of biochar-chitosan compound
10 to 15 percent of diatomite
15 to 20 percent of plant ash
10-15% of zeolite
5 to 10 percent of starch
The sum of the mass percentages of the raw materials is 100 percent.
Preferably, the soil remediation agent comprises the following raw materials in percentage by weight: 40% of biochar-chitosan compound, 15% of diatomite, 20% of plant ash, 15% of zeolite and 10% of starch.
Further, the chitosan in the repairing agent can be chitosan and derivatives thereof, including carboxymethyl chitosan, water-soluble chitosan, chitosan quaternary ammonium salt and the like.
The preparation method of the biochar-chitosan compound comprises the following steps: MgCl for corn straw2Treating the solution, soaking at room temperature, drying in an oven at 80 ℃, then placing the composite material in a vacuum tube furnace, introducing nitrogen, pyrolyzing at 500 ℃, cooling, cleaning, drying, and sieving with a 100-mesh sieve to obtain modified biochar; adding MgCl into chitosan solution respectively2And (3) continuously stirring the solution and the modified biochar by magnetic force for 30min, dropwise adding the chitosan solution into the condensation solution NaOH solution, standing at room temperature for 24h, washing with distilled water to be neutral, and performing vacuum freeze drying for 24h to obtain the biochar-chitosan composite material.
The mass concentration of the magnesium chloride solution is 1%.
The mass concentration of chitosan in the chitosan solution is 2-4%.
The mass ratio of the chitosan solution to the magnesium chloride to the modified biochar is 1: 8-10.
The invention also provides a preparation method of the heavy metal contaminated soil remediation agent, which comprises the following specific steps: and uniformly mixing the biochar-chitosan compound, the diatomite, the plant ash, the zeolite and the starch according to the proportion to obtain the soil remediation agent.
The invention also provides an application method of the heavy metal contaminated soil remediation agent, the soil remediation agent is added into the heavy metal contaminated soil, the dosage of the added soil remediation agent is 5-10% of the weight of the contaminated soil, and then a small amount of water is sprayed to keep the soil moist. The agent can be used for treating single heavy metal contaminated soil, is also suitable for treating composite heavy metal contaminated soil, and is suitable for repairing large-area heavy metal contaminated soil.
In the invention, the chitosan has good biocompatibility and biodegradability, contains a large number of active groups such as amino groups and hydroxyl groups, can be chelated with heavy metal ions to generate an adsorption effect, and the biochar has larger specific surface area and porosity, is a good adsorption material with environmental benefits, and combines the biochar with the chitosan to remarkably improve the adsorption effect on the heavy metals and reduce the repair cost; the diatomite is siliceous rock, siliceous sedimentary rock of biological origin, mainly composed of remains of ancient diatoms, and has strong adsorbability, light volume weight, uniform fineness, neutral pH value, no toxicity and good mixing uniformity. The diatomite can be used as a high-efficiency fertilizer to promote the growth of crops and improve soil; the zeolite soil remediation method is characterized in that heavy metals in soil are solidified and passivated in zeolite pore cavities through reactions such as adsorption and ion exchange with the heavy metals, so that the biological effectiveness and the mobility of the heavy metals in the soil are reduced, the risks of absorption of pollutants by crops and transfer of the pollutants to a food chain are reduced, and the poisoning threat caused by eating the polluted crops by people is avoided.
Compared with the prior art, the soil remediation agent has the advantages of natural source, no damage to the physicochemical properties of soil and good remediation effect, and can effectively remediate the contaminated soil. In addition, the chitosan has good sterilization and bacteriostasis performance, can effectively inhibit the growth of harmful bacteria in soil, and can also be used as a soil conditioner.
Detailed Description
In the following specific examples, the preparation methods of the biochar-chitosan composite are as follows: MgCl for corn straw2Treating the solution, soaking at room temperature, drying in an oven at 80 ℃, then placing the composite material in a vacuum tube furnace, introducing nitrogen, pyrolyzing at 500 ℃, cooling, cleaning, drying, and sieving with a 100-mesh sieve to obtain modified biochar; adding MgCl into chitosan solution respectively2Continuously stirring the solution and the modified biochar by magnetic force for 30min, dropwise adding the chitosan solution into a condensation solution NaOH solution, standing at room temperature for 24h, washing with distilled water to be neutral, and performing vacuum freeze drying for 24h to obtain a biochar-chitosan composite material; the mass concentration of the magnesium chloride solution is 1%; the mass concentration of chitosan in the chitosan solution is 2-4%; the mass ratio of the chitosan solution to the magnesium chloride to the modified biochar is 1: 1: 10.
example 1
A soil remediation agent is prepared from the following raw materials in parts by weight: 40% of biochar-chitosan compound, 15% of diatomite, 20% of plant ash, 15% of zeolite and 10% of starch, and uniformly mixing; the chitosan is water-soluble chitosan;
the soil repairing agent repairing method comprises the following steps:
A. collecting the polluted soil to be restored, removing impurities from the polluted soil, and crushing the polluted soil, wherein the diameter of the crushed polluted soil is not more than 3 cm;
B. b, uniformly mixing the soil remediation agent and the contaminated soil in the step A according to a ratio of 1:10, and spraying a small amount of water;
C. standing and repairing for 10 days;
through comparing the soil before and after restoration, the soil after restoration has higher restoration efficiency of contaminated soil containing toxic and harmful substances such as copper, chromium, lead, zinc, arsenic, mercury, phenols, nitrobenzene and the like, and can meet the relevant requirements of the soil pollution risk management and control standard (trial) for soil environment quality construction land (GB 36600-2018).
Example 2
A soil remediation agent is prepared from the following raw materials in parts by weight: 50% of biochar-chitosan compound, 13% of diatomite, 17% of plant ash, 13% of zeolite and 7% of starch, and uniformly mixing; the chitosan is water-soluble chitosan;
the soil repairing agent repairing method comprises the following steps:
A. collecting the polluted soil to be restored, removing impurities from the polluted soil, and crushing the polluted soil, wherein the diameter of the crushed polluted soil is not more than 3 cm;
B. b, uniformly mixing the soil remediation agent and the contaminated soil in the step A according to a ratio of 1:10, and spraying a small amount of water;
C. standing and repairing for 10 days;
through comparing the soil before and after restoration, the soil after restoration has higher restoration efficiency of contaminated soil containing toxic and harmful substances such as copper, chromium, lead, zinc, arsenic, mercury, phenols, nitrobenzene and the like, and can meet the relevant requirements of the soil pollution risk management and control standard (trial) for soil environment quality construction land (GB 36600-2018).
Example 3
A soil remediation agent is prepared from the following raw materials in parts by weight: 60% of biochar-chitosan compound, 10% of diatomite, 15% of plant ash, 10% of zeolite and 5% of starch, and uniformly mixing; the chitosan is water-soluble chitosan;
the soil repairing agent repairing method comprises the following steps:
A. collecting the polluted soil to be restored, removing impurities from the polluted soil, and crushing the polluted soil, wherein the diameter of the crushed polluted soil is not more than 3 cm;
B. b, uniformly mixing the soil remediation agent and the contaminated soil in the step A according to a ratio of 1:10, and spraying a small amount of water;
C. standing and repairing for 10 days;
through comparing the soil before and after restoration, the soil after restoration has higher restoration efficiency of contaminated soil containing toxic and harmful substances such as copper, chromium, lead, zinc, arsenic, mercury, phenols, nitrobenzene and the like, and can meet the relevant requirements of the soil pollution risk management and control standard (trial) for soil environment quality construction land (GB 36600-2018).
Example 4
A soil remediation agent is prepared from the following raw materials in parts by weight: 40% of biochar-chitosan compound, 15% of diatomite, 20% of plant ash, 15% of zeolite and 10% of starch, and uniformly mixing; the chitosan is carboxymethyl chitosan;
the soil repairing agent repairing method comprises the following steps:
A. collecting the polluted soil to be restored, removing impurities from the polluted soil, and crushing the polluted soil, wherein the diameter of the crushed polluted soil is not more than 3 cm;
B. b, uniformly mixing the soil remediation agent and the contaminated soil in the step A according to a ratio of 1:10, and spraying a small amount of water;
C. and standing for repairing for 10 days.
Example 5
A soil remediation agent is prepared from the following raw materials in parts by weight: 40% of biochar-chitosan compound, 15% of diatomite, 20% of plant ash, 15% of zeolite and 10% of starch, and uniformly mixing; the chitosan is chitosan quaternary ammonium salt;
the soil repairing agent repairing method comprises the following steps:
A. collecting the polluted soil to be restored, removing impurities from the polluted soil, and crushing the polluted soil, wherein the diameter of the crushed polluted soil is not more than 3 cm;
B. b, uniformly mixing the soil remediation agent and the contaminated soil in the step A according to a ratio of 1:10, and spraying a small amount of water;
C. and standing for repairing for 10 days.
Example 6
The method comprises the following steps of measuring the repairing result of solidifying and repairing the lead-cadmium polluted soil by the soil repairing agent, wherein the experimental method and the experimental result are shown in the following table 1:
TABLE 1 Experimental results of different repairing and estimating remediation of lead-cadmium contaminated soil
In the above experiment, biochar and chitosan of the same mass as in example 1 were added to the same control example 1, and no complex was prepared. Experimental results show that the embodiment 1 has a remarkable curing and repairing effect, the forms of heavy metals such as lead, cadmium and the like mainly change from an unstable state to a stable state, and the curing effect of heavy metals such as lead and cadmium is facilitated, so that the embodiment is the best embodiment of the invention. The experimental results of the embodiments 2 to 3 show that the compatibility proportion of the raw materials has significant influence on the curing and repairing effect of the repairing agent, wherein the larger the addition amount of the biochar-chitosan is, the better the curing effect of the repairing agent is; the experimental results of examples 4-5 show that the selection of chitosan has a significant influence on the curing repair effect of the product, wherein water-soluble chitosan is optimally added; the experimental results of the comparative examples show that the repairing agent has a remarkable curing repairing effect, and the preparation of the biochar and chitosan compound is the root cause for achieving the technical effects.
The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention as set forth in the appended claims.
Claims (8)
1. The heavy metal contaminated soil remediation agent is characterized in that the soil remediation agent is composed of biochar-chitosan compound, diatomite, plant ash, zeolite and starch, and the soil remediation agent is prepared from the following raw materials in percentage by weight:
40-60% of biochar-chitosan compound
10 to 15 percent of diatomite
15 to 20 percent of plant ash
10-15% of zeolite
5 to 10 percent of starch
The sum of the mass percentages of the raw materials is 100 percent.
2. The soil remediation agent for heavy metal contaminated soil according to claim 1, wherein the soil remediation agent comprises the following raw materials in percentage by weight: 40% of biochar-chitosan compound, 15% of diatomite, 20% of plant ash, 15% of zeolite and 10% of starch.
3. The soil remediation agent of claim 1, wherein the chitosan is selected from the group consisting of chitosan and derivatives thereof, such as carboxymethyl chitosan, water-soluble chitosan, and chitosan quaternary ammonium salt.
4. The heavy metal contaminated soil remediation agent of claim 1, wherein said biochar-chitosan complex is prepared by the following steps: MgCl for corn straw2Treating the solution, soaking at room temperature, drying in an oven at 80 ℃, then placing the composite material in a vacuum tube furnace, introducing nitrogen, pyrolyzing at 500 ℃, cooling, cleaning, drying, and sieving with a 100-mesh sieve to obtain modified biochar; adding MgCl into chitosan solution respectively2And (3) continuously stirring the solution and the modified biochar by magnetic force for 30min, dropwise adding the chitosan solution into the condensation solution NaOH solution, standing at room temperature for 24h, washing with distilled water to be neutral, and performing vacuum freeze drying for 24h to obtain the biochar-chitosan composite material.
5. The agent for remediating heavy metal contaminated soil as recited in claim 4, wherein said MgCl is selected from the group consisting of2The mass concentration of the solution was 1%.
6. The agent for remediating heavy metal contaminated soil as recited in claim 4, wherein the chitosan solution has a chitosan concentration of 2-4% by weight.
7. The agent for remediating heavy metal contaminated soil as recited in claim 1, wherein said chitosan solution, MgCl2The mass ratio of the solution to the modified biochar is 1: 8-10.
8. The heavy metal contaminated soil remediation agent of claim 1, wherein said soil remediation agent is prepared by a method comprising the steps of: and uniformly mixing the biochar-chitosan compound, the diatomite, the plant ash, the zeolite and the starch according to the proportion to obtain the soil remediation agent.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861994A (en) * | 2021-09-30 | 2021-12-31 | 广西壮族自治区农业科学院 | Biochar soil restoration agent and preparation method thereof |
| CN115450601A (en) * | 2022-10-09 | 2022-12-09 | 中国石油大学(北京) | Radial well foam fracturing repair method for low-permeability polluted soil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788960A (en) * | 2014-03-05 | 2014-05-14 | 中国科学院合肥物质科学研究院 | Functional fertilizer and repair agents for repairing soil heavy metal |
| CN105733602A (en) * | 2016-02-04 | 2016-07-06 | 周益辉 | Heavy metal cadmium and lead composite polluted soil restoration agent and preparing method thereof |
-
2020
- 2020-12-28 CN CN202011574705.6A patent/CN112457864A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788960A (en) * | 2014-03-05 | 2014-05-14 | 中国科学院合肥物质科学研究院 | Functional fertilizer and repair agents for repairing soil heavy metal |
| CN105733602A (en) * | 2016-02-04 | 2016-07-06 | 周益辉 | Heavy metal cadmium and lead composite polluted soil restoration agent and preparing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 项江欣: "生物炭-壳聚糖复合材料对Cd的吸附特性及对Cd污染土壤的修复效应与机理研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
| 黄占斌主编: "《环境材料学》", 30 November 2017, 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861994A (en) * | 2021-09-30 | 2021-12-31 | 广西壮族自治区农业科学院 | Biochar soil restoration agent and preparation method thereof |
| CN115450601A (en) * | 2022-10-09 | 2022-12-09 | 中国石油大学(北京) | Radial well foam fracturing repair method for low-permeability polluted soil |
| CN115450601B (en) * | 2022-10-09 | 2023-12-22 | 中国石油大学(北京) | Foam fracturing repair method for radial well of low-permeability polluted soil |
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Application publication date: 20210309 |