CN113578949A - Method for restoring soil for planting garden plants - Google Patents
Method for restoring soil for planting garden plants Download PDFInfo
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- CN113578949A CN113578949A CN202110855986.0A CN202110855986A CN113578949A CN 113578949 A CN113578949 A CN 113578949A CN 202110855986 A CN202110855986 A CN 202110855986A CN 113578949 A CN113578949 A CN 113578949A
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- soil
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- 239000002689 soil Substances 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 238000005067 remediation Methods 0.000 claims abstract description 45
- 239000002738 chelating agent Substances 0.000 claims abstract description 32
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000005725 8-Hydroxyquinoline Substances 0.000 claims abstract description 26
- 229920001661 Chitosan Polymers 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229960003540 oxyquinoline Drugs 0.000 claims abstract description 26
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000645 desinfectant Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 229920002125 Sokalan® Polymers 0.000 claims description 10
- 239000004584 polyacrylic acid Substances 0.000 claims description 10
- 239000000176 sodium gluconate Substances 0.000 claims description 10
- 235000012207 sodium gluconate Nutrition 0.000 claims description 10
- 229940005574 sodium gluconate Drugs 0.000 claims description 10
- GNVDAZSPJWCIQZ-UHFFFAOYSA-N flusulfamide Chemical compound ClC1=CC([N+](=O)[O-])=CC=C1NS(=O)(=O)C1=CC=C(Cl)C(C(F)(F)F)=C1 GNVDAZSPJWCIQZ-UHFFFAOYSA-N 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 239000001488 sodium phosphate Substances 0.000 claims description 9
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 9
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 9
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 claims description 5
- 235000011006 sodium potassium tartrate Nutrition 0.000 claims description 5
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 3
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 3
- 229940074439 potassium sodium tartrate Drugs 0.000 claims description 3
- 229960001484 edetic acid Drugs 0.000 claims description 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 38
- 230000000694 effects Effects 0.000 abstract description 29
- 238000002386 leaching Methods 0.000 description 16
- 239000000126 substance Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 8
- 238000013329 compounding Methods 0.000 description 7
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000000536 complexating effect Effects 0.000 description 3
- 238000010668 complexation reaction Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000000975 co-precipitation Methods 0.000 description 2
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical group O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 231100001240 inorganic pollutant Toxicity 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000001476 sodium potassium tartrate Substances 0.000 description 2
- 239000003802 soil pollutant Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 metal complex compound Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- HFFLGKNGCAIQMO-UHFFFAOYSA-N trichloroacetaldehyde Chemical compound ClC(Cl)(Cl)C=O HFFLGKNGCAIQMO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
- A01N41/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom containing a sulfur-to-oxygen double bond
- A01N41/04—Sulfonic acids; Derivatives thereof
- A01N41/06—Sulfonic acid amides
-
- 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
- A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
- A01N41/12—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom not containing sulfur-to-oxygen bonds, e.g. polysulfides
-
- 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
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
-
- 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
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/26—Phosphorus; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dentistry (AREA)
- Environmental Sciences (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Inorganic Chemistry (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to the field of soil remediation, and particularly discloses a method for remediating soil for planting garden plants. The method for restoring the soil for planting the garden plants comprises the following steps: step 1) soil disinfection: adding a soil disinfectant into soil to be repaired, and stirring and mixing; step 2) preparing a soil remediation agent: uniformly mixing 25-30 parts by mass of ammonium citrate, 10-18 parts by mass of chitosan, 28-35 parts by mass of diatomite, 8-15 parts by mass of 8-hydroxyquinoline, 8-12 parts by mass of chelating agent and 5-10 parts by mass of pH regulator to obtain a soil remediation agent; step 3) soil remediation: adding a soil repairing agent into the soil to be repaired, and maintaining for 1-15 d. The restoration method of planting landscape plant soil makes the soil after the restoration have higher density, and repair effect is good, and stability is better, is difficult to appear heavy metal element secondary pollution.
Description
Technical Field
The application relates to the field of soil remediation, in particular to a method for remediating soil for planting garden plants.
Background
Soil pollutants are substances causing soil pollution, and can be roughly divided into two categories, namely inorganic pollutants and organic pollutants, wherein the inorganic pollutants are mostly heavy metal elements, arsenic, selenium, fluorine, radioactive elements, salts, acids, alkalis and the like; organic pesticides are more organic pollutants; and chloral, phenol, cyanogen, benzopyrene, petroleum, detergent and other harmful substances. After the soil is polluted, influence exists when garden plants are planted, so that certain measures need to be taken for soil restoration.
Soil remediation is a technical measure to restore the normal function of soil containing soil pollutants. Soil remediation refers to the physical, chemical and biological processes used to transfer, absorb, degrade and transform pollutants in soil to reduce their concentration to acceptable levels or to transform toxic and harmful pollutants into harmless materials. The general chemical method is to add the modifying agent into the soil, reduce the biological effectiveness of the heavy metal through the adsorption, oxidation reduction, antagonism or precipitation of the heavy metal, the modifying agent has poor solidification stability after repairing the soil, the heavy metal is easy to separate from the soil for a long time, secondary pollution is generated, and the better effect of repairing the soil cannot be achieved.
In view of the above related technologies, the inventors consider that the conditioner is likely to cause secondary pollution after soil remediation, and cannot achieve the expected soil remediation effect, which needs to be further improved.
Disclosure of Invention
In order to improve the effect of soil remediation and reduce secondary pollution, the application provides a method for remediating plant and garden plant soil.
The application provides a method for restoring soil for planting plants and garden plants, which adopts the following technical scheme:
a method for restoring soil for planting plants and garden plants comprises the following steps:
step 1) soil disinfection:
adding a soil disinfectant into the soil to be repaired, stirring and mixing, and reacting for 24-72h, wherein the mass ratio of the soil disinfectant to the soil to be repaired is (0.1-2): 100, respectively;
step 2) preparing a soil remediation agent:
uniformly mixing 25-30 parts by mass of ammonium citrate, 10-18 parts by mass of chitosan, 28-35 parts by mass of diatomite, 8-15 parts by mass of 8-hydroxyquinoline, 8-12 parts by mass of chelating agent and 5-10 parts by mass of pH regulator to obtain a soil remediation agent;
step 3) soil remediation:
adding a soil repairing agent into the soil to be repaired, and maintaining for 1-15d, wherein the mass ratio of the soil repairing agent to the soil to be repaired is (0.5-1.5): 100.
by adopting the technical scheme, the soil repairing agent is compounded by adopting ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline and is added with the chelating agent, so that the reaction and combination of the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline with harmful substances contained in the soil are promoted, the repaired soil has higher density and good repairing effect, meanwhile, the soil repairing agent has better stability of complexing with heavy metal elements, the stable curing performance of the heavy metals is improved remarkably, and the condition of secondary pollution of the heavy metal elements is not easy to occur for a long time.
Preferably, in the step 2), 27-28 parts by mass of ammonium citrate, 13-15 parts by mass of chitosan, 30-32 parts by mass of diatomite, 11-13 parts by mass of 8-hydroxyquinoline, 9-11 parts by mass of chelating agent and 7-8 parts by mass of pH regulator are uniformly mixed to obtain the soil remediation agent.
By adopting the technical scheme, the proportion of the raw materials of the soil repairing agent is optimized, so that the compound soil repairing agent can repair the soil to be repaired, the soil repairing agent has a better repairing effect, the complexing and adsorbing effects on heavy metal elements are better, the soil repairing agent has better stability after being combined with the heavy metal elements in the soil, the repairing effect is better, and the secondary pollution is further reduced.
Preferably, in the step 2), the chelating agent comprises one or more of disodium ethylenediaminetetraacetate, ethylenediaminetetraacetic acid, potassium sodium tartrate and nitrilotriacetic acid.
By adopting the technical scheme, the chelating agent and the harmful substances such as heavy metals in the soil to be repaired have higher selectivity and sensitivity due to the adoption of the specific chelating agent, the generated metal chelate has higher curing rate and better curing effect, and the repairing effect is better.
Preferably, the chelating agent is prepared from polyacrylic acid and sodium gluconate according to the weight ratio of 2: (2-3) by mass ratio.
By adopting the technical scheme, the adopted chelating agent is compounded by polyacrylic acid and sodium gluconate according to a specific proportion, so that better selectivity of ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline in soil remediation is promoted, the remediation effect is better, meanwhile, the biodegradability is good, the environmental protection requirement is met, the influence on soil remediation is smaller, the complex of heavy metal elements has better stability, and the situation of secondary pollution is not easy to occur in the remedied soil for a long time.
Preferably, 8-10 parts by mass of polyacrylamide is further added in the step 2).
By adopting the technical scheme, the polyacrylamide is added when the soil repairing agent is prepared, and the polyacrylamide is utilized to promote the coordinated compounding of ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline, so that the prepared soil repairing agent can better realize the in-situ solidification of heavy metals in various modes such as adsorption, surface complexation, ion exchange, coprecipitation and the like when the soil to be repaired is repaired, the solidification efficiency is higher, the repairing effect is obvious, meanwhile, the stability of the metal complex compound is better, and the secondary pollution is not easy to occur for a long time.
Preferably, the soil disinfectant comprises 8-10 parts by mass of flusulfamide and 20-25 parts by mass of trisodium phosphate.
By adopting the technical scheme, the soil disinfectant is formed by compounding the flusulfamide and the trisodium phosphate according to a specific ratio, the soil to be repaired is disinfected firstly, and some harmful substances and strains in the soil to be repaired are disinfected, so that when the soil repairing agent is used for repairing the soil, the interference of the harmful substances is further reduced, and the soil repairing effect is better.
Preferably, the pH regulator comprises one or more of calcium oxide, calcium hydroxide, and calcium carbonate.
By adopting the technical scheme, the soil remediation agent is regulated by utilizing the specific pH regulator, and the calcium oxide, the calcium hydroxide and the calcium carbonate are beneficial to promoting the coordinated compounding of the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline and the adsorption of heavy metals in the soil, so that the heavy metals are better fixed, and the remediation effect is better.
Preferably, in the step 3), the mass water content of the soil to be repaired is kept at 20% -60%, and the soil to be repaired is maintained for 5-7 d.
By adopting the technical scheme, the water content of the soil to be repaired is controlled to be 20% -60%, so that the soil repairing agent has better maintenance and repair effects in the maintenance process of the soil to be repaired, the in-situ solidification of heavy metal by the soil repairing agent through various modes such as adsorption, surface complexation, ion exchange, coprecipitation and the like is facilitated, the solidification efficiency is high, the soil repairing agent can be more stably acted in the soil, the soil is not easy to run off, and the solidification efficiency of the heavy metal elements is high.
In summary, the present application has the following beneficial effects:
1. because the soil repairing agent is compounded by adopting the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline and the chelating agent is added, the soil repairing agent is beneficial to promoting the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline to react and combine with harmful substances contained in the soil, so that the repaired soil has higher density and good repairing effect, meanwhile, the soil repairing agent has better stability of complexing with heavy metal elements, is beneficial to obviously improving the stable solidification performance of the heavy metals, and is not easy to cause the secondary pollution of the heavy metal elements for a long time.
2. In the application, preferably, the adopted chelating agent is compounded by polyacrylic acid and sodium gluconate according to a specific proportion, so that the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline are better promoted to have better selectivity when the soil is repaired, the complex of the heavy metal elements has better stability, and the condition of secondary pollution is not easy to occur to the repaired soil for a long time.
3. According to the soil remediation agent, the soil disinfectant is formed by compounding the flusulfamide and the trisodium phosphate according to a specific ratio, the soil to be remediated is disinfected firstly, and some harmful substances and strains in the soil to be remediated are disinfected, so that when the soil remediation agent is used for remediating the soil, the interference of the harmful substances is further reduced, and the soil remediation effect is better.
Detailed Description
The present application will be described in further detail with reference to examples.
The information on the source of each component used in the following examples and comparative examples is detailed in Table 1.
TABLE 1
Example 1
A method for restoring soil for planting garden plants comprises the following steps:
step 1) soil disinfection:
adding 0.1kg of soil disinfectant into 100kg of soil to be repaired, stirring and mixing, and reacting for 24 hours;
in this embodiment, the soil disinfectant is chlorine dioxide disinfectant powder.
Step 2) preparing a soil remediation agent:
adding 25kg of ammonium citrate, 10kg of chitosan, 28kg of diatomite, 8kg of 8-hydroxyquinoline, 8kg of chelating agent and 5kg of pH regulator into a stirring kettle, and stirring at a stirring speed of 500r/min for 15min to obtain a soil remediation agent;
in this example, the chelating agent is nitrilotriacetic acid, and the pH adjuster is magnesium oxide;
step 3) soil remediation:
0.5kg of soil remediation agent is added into 100kg of soil to be remediated, and the soil is maintained for 1 d.
Example 2
Compared with example 1, the difference is only that:
in the step 1), 2kg of soil disinfectant is mixed with 100kg of soil to be repaired, and the reaction time is 72 hours;
in the step 2), the addition amount of ammonium citrate is 30kg, the addition amount of chitosan is 18kg, the addition amount of kieselguhr is 35kg, the addition amount of 8-hydroxyquinoline is 15kg, the addition amount of chelating agent is 12kg, and the addition amount of pH regulator is 10 kg;
in the step 3), 1.5kg of soil remediation agent is mixed with 100kg of soil to be remediated, and the soil is maintained for 15 days.
Example 3
Compared with example 1, the difference is only that:
in the step 1), 1kg of soil disinfectant is mixed with 100kg of soil to be repaired, and the reaction time is 48 hours;
in the step 2), the addition amount of ammonium citrate is 27.5kg, the addition amount of chitosan is 14kg, the addition amount of kieselguhr is 31kg, the addition amount of 8-hydroxyquinoline is 12kg, the addition amount of a chelating agent is 10kg, and the addition amount of a pH regulator is 7.5 kg;
in the step 3), 1kg of soil remediation agent is mixed with 100kg of soil to be remediated, and the soil is maintained for 10 days.
Example 4
Compared with example 3, the difference is only that:
in the step 2), the addition amount of ammonium citrate is 27kg, the addition amount of chitosan is 13kg, the addition amount of diatomite is 30kg, the addition amount of 8-hydroxyquinoline is 11kg, the addition amount of a chelating agent is 9kg, and the addition amount of a pH regulator is 7 kg.
Example 5
Compared with example 3, the difference is only that:
in the step 2), the addition amount of ammonium citrate is 28kg, the addition amount of chitosan is 15kg, the addition amount of diatomite is 32kg, the addition amount of 8-hydroxyquinoline is 13kg, the addition amount of a chelating agent is 11kg, and the addition amount of a pH regulator is 8 kg.
Example 6
Compared with example 3, the difference is only that:
the chelating agent is disodium ethylene diamine tetraacetate.
Example 7
Compared with example 3, the difference is only that:
the chelating agent is potassium sodium tartrate.
Example 8
Compared with example 3, the difference is only that:
the chelating agent is composed of 5kg of polyacrylic acid and 5kg of sodium gluconate.
Example 9
Compared with example 3, the difference is only that:
the chelating agent is composed of 4kg of polyacrylic acid and 6kg of sodium gluconate.
Example 10
Compared with example 9, the difference is only that:
the chelating agent is composed of 4kg of polyacrylic acid and 6kg of sodium potassium tartrate.
Example 11
Compared with example 9, the difference is only that:
the chelating agent consists of 4kg of sodium potassium tartrate and 6kg of sodium gluconate.
Example 12
Compared to example 3, the difference is only between:
in the step 2), 8kg of polyacrylamide is also added.
Example 13
Compared to example 3, the difference is only between:
in the step 2), 10kg of polyacrylamide is also added.
Example 14
Compared with example 3, the difference is only that:
the soil disinfectant consists of 8kg of flusulfamide and 20kg of trisodium phosphate.
Example 15
Compared with example 14, the difference is only that:
the adding amount of the flusulfamide is 10kg, and the adding amount of the trisodium phosphate is 25 kg.
Example 16
Compared to example 3, the difference is only between:
the pH regulator is calcium carbonate.
Example 17
Compared with example 3, the difference is only that:
and 3) maintaining the mass water content of the soil to be repaired at 20%, and maintaining the soil to be repaired for 5 d.
Example 18
Compared with example 3, the difference is only that:
and 3) maintaining the mass water content of the soil to be repaired at 60%, and maintaining the soil to be repaired for 7 d.
Example 19
Compared with example 3, the difference is only that:
the soil disinfectant consists of 8kg of flusulfamide, 8kg of dimethyl disulfide and 20kg of trisodium phosphate.
In the step 2), 8kg of polyacrylamide is also added.
The chelating agent is composed of 5kg of polyacrylic acid and 5kg of sodium gluconate.
The pH regulator is calcium carbonate.
And 3) maintaining the mass water content of the soil to be repaired at 60%, and maintaining the soil to be repaired for 7 d.
Comparative example 1
Compared with example 3, the difference is only that:
the same amount of ammonium citrate is used to replace chitosan, diatomite and 8-hydroxyquinoline.
Comparative example 2
Compared with example 3, the difference is only that:
the chitosan was replaced with an equal amount of ammonium citrate.
Comparative example 3
Compared with example 3, the difference is only that:
equal amounts of ammonium citrate were used instead of diatomaceous earth.
Comparative example 4
Compared with example 3, the difference is only that:
equal amount of ammonium citrate was used instead of 8-hydroxyquinoline.
Experiment 1
Repairing effect of heavy metal pollutants
The soil repaired by the method for repairing the soil for planting garden plants in examples 1 to 19 and comparative examples 1 to 4 is tested for the leaching concentration (mg/kg) of heavy metals according to GB 5085.3-2007 Standard for identification of hazardous waste Leaching toxicity identification, and is recorded as the leaching concentration (mg/kg) of heavy metals, and the fixation rate (%) is calculated.
The fixation rate (%) [ (after repair-before repair)/before repair ] × 100%.
Experiment 2
Secondary pollution improving effect
After 90 days, the soil repaired by the method for repairing soil for planting garden plants in examples 1 to 19 and comparative examples 1 to 4 is tested for heavy metal leaching concentration (mg/kg) according to GB 5085.3-2007 Standard Distinguishing for hazardous waste Distinguishing Leaching toxicity, the heavy metal leaching concentration (mg/kg) is recorded as 90 days, and the variation (mg/kg) of the heavy metal leaching concentration is calculated.
And (4) after the heavy metal leaching concentration variable quantity (mg/kg) is 90 d.
The data for the assay of experiment 1 are detailed in tables 2 and 3.
The data for experiment 2 are detailed in tables 4 and 5.
TABLE 2
TABLE 3
TABLE 4
TABLE 5
According to tables 2 to 5, comparative examples 1 to 4 are respectively compared with the data of example 3, and the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline are added into the soil remediation agent to remediate the soil after compounding, so that the leaching concentration of the heavy metal in the remediated soil is obviously reduced, the fixation rate is obviously increased, and the variation is obviously reduced, which shows that the compounding of the ammonium citrate, the chitosan, the diatomite and the 8-hydroxyquinoline has the effect of obviously fixing the heavy metal in the soil, is not easy to generate secondary pollution, and has no obvious effect when any substance is lacked.
According to tables 2 to 5, the data comparison between examples 4 and 5 and example 3 shows that the proportion of ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline in the soil remediation agent is optimized, so that the leaching concentration of heavy metals in the remediated soil is reduced, the fixation rate is increased, the variation is reduced, and the optimization of the proportion of ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline is helpful for improving the remediation effect of the soil remediation agent and reducing secondary pollution to a certain extent.
According to tables 2 to 5, the data comparison between examples 6 and 7 and example 3 shows that the soil remediation agent adopts a specific chelating agent, so that the leaching concentration of heavy metal in the remediated soil is reduced to a certain extent, and the fixation rate is increased to a certain extent, which indicates that the use of the specific chelating agent is beneficial to promoting the complexation of heavy metal ions in the soil remediation agent to a certain extent, and further improves the remediation effect.
According to tables 2 to 5, comparing the data of examples 8 to 11 with the data of example 3, respectively, it can be seen that the chelating agent adopted in the soil remediation agent again is composed of polyacrylic acid and sodium gluconate in a specific ratio, the leaching concentration of heavy metals in the remediated soil is reduced, the fixation rate is increased, and the variation is reduced, which indicates that the polyacrylic acid and sodium gluconate are compounded in the specific ratio to form the chelating agent, which is helpful to promote the synergistic cooperation of ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline to a certain extent, so that the remediation effect is better, the stability is better, the secondary pollution is reduced, and no obvious effect exists in replacing any substance.
According to tables 2 to 5, comparing the data of the embodiments 12 and 13 with the data of the embodiment 3, when the soil is repaired, a specific amount of polyacrylamide is further added into the soil repairing agent, so that the leaching concentration of heavy metals in the repaired soil is reduced, the fixation rate is increased, and the variation is reduced, which indicates that the polyacrylamide is helpful for promoting the synergistic cooperation of ammonium citrate, chitosan, diatomite and 8-hydroxyquinoline to a certain extent, so that the repairing effect is better, the stability is better, and the secondary pollution is reduced.
According to the data comparison of the examples 14 and 15 in tables 2 to 5, the soil disinfectant adopted in the soil remediation is formed by mixing the flusulfamide and the trisodium phosphate in a specific ratio, the leaching concentration of the heavy metals in the remediated soil is reduced, the fixation rate is increased, and the soil disinfectant prepared by compounding the flusulfamide and the trisodium phosphate in a specific ratio can improve the remediation effect of the soil to a certain extent.
According to tables 2 to 5, as can be seen from comparison of the data of example 16 and example 3, when the specific pH regulator is used for soil remediation, the leaching concentration of the heavy metal in the remediated soil is reduced to a certain extent, and the fixation rate is increased to a certain extent, which indicates that the specific pH regulator can improve the remediation effect of the soil to a certain extent.
According to tables 2 to 5, the data of the embodiments 17 and 18 are compared with the data of the embodiment 3, so that the mass water content of the soil to be repaired is controlled when the soil is repaired, the leaching concentration of the heavy metal in the repaired soil is reduced, the fixation rate is increased, and the repairing effect of the soil can be improved to a certain extent by controlling the mass water content of the soil to be repaired.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A restoration method for soil for planting garden plants is characterized in that: the method comprises the following steps:
step 1) soil disinfection:
adding a soil disinfectant into the soil to be repaired, stirring and mixing, and reacting for 24-72h, wherein the mass ratio of the soil disinfectant to the soil to be repaired is (0.1-2): 100, respectively;
step 2) preparing a soil remediation agent:
uniformly mixing 25-30 parts by mass of ammonium citrate, 10-18 parts by mass of chitosan, 28-35 parts by mass of diatomite, 8-15 parts by mass of 8-hydroxyquinoline, 8-12 parts by mass of chelating agent and 5-10 parts by mass of pH regulator to obtain a soil remediation agent;
step 3) soil remediation:
adding a soil repairing agent into the soil to be repaired, and maintaining for 1-15d, wherein the mass ratio of the soil repairing agent to the soil to be repaired is (0.5-1.5): 100.
2. the method for remediating garden plant growing soil as recited in claim 1, wherein:
in the step 2), 27-28 parts by mass of ammonium citrate, 13-15 parts by mass of chitosan, 30-32 parts by mass of diatomite, 11-13 parts by mass of 8-hydroxyquinoline, 9-11 parts by mass of a chelating agent and 7-8 parts by mass of a pH regulator are uniformly mixed to obtain the soil remediation agent.
3. The method for remediating garden plant growing soil as recited in claim 2, wherein:
in the step 2), the chelating agent comprises one or more of disodium ethylene diamine tetraacetate, ethylene diamine tetraacetic acid, potassium sodium tartrate and nitrilotriacetic acid.
4. The method for remediating garden plant growing soil as recited in claim 3, wherein:
the chelating agent is prepared from polyacrylic acid and sodium gluconate according to the weight ratio of 2: (2-3) by mass ratio.
5. The method for remediating garden plant growing soil as recited in claim 4, wherein:
in the step 2), 8-10 parts by mass of polyacrylamide is also added.
6. The method for remediating garden plant growing soil as recited in claim 4, wherein:
the soil disinfectant comprises 8-10 parts by mass of flusulfamide and 20-25 parts by mass of trisodium phosphate.
7. The method for remediating garden plant growing soil as recited in claim 4, wherein:
the pH regulator comprises one or more of calcium oxide, calcium hydroxide and calcium carbonate.
8. The method for remediating garden plant growing soil as recited in claim 4, wherein:
in the step 3), the mass water content of the soil to be repaired is kept at 20% -60%, and the soil to be repaired is maintained for 5-7 d.
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Application publication date: 20211102 |