CN113072946A - Agent for in-situ remediation of petroleum hydrocarbon contaminated soil, preparation method and application thereof - Google Patents
Agent for in-situ remediation of petroleum hydrocarbon contaminated soil, preparation method and application thereof Download PDFInfo
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- CN113072946A CN113072946A CN201911303738.4A CN201911303738A CN113072946A CN 113072946 A CN113072946 A CN 113072946A CN 201911303738 A CN201911303738 A CN 201911303738A CN 113072946 A CN113072946 A CN 113072946A
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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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- 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
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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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
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Abstract
The invention provides a medicament for in-situ remediation of petroleum hydrocarbon contaminated soil, and a preparation method and application thereof. The agent for in-situ remediation of petroleum hydrocarbon contaminated soil comprises: and (2) component A: the fertilizer comprises, by weight, 10-15 parts of urea, 10-15 parts of monopotassium phosphate phosphorus-potassium compound fertilizer, 5-8 parts of potassium magnesium sulfate fertilizer and 100 parts of water; and (B) component: a powder liquid of rotten fruits; and (3) component C: crushed deciduous leaves of fruit trees and/or deciduous leaves of broad-leaved trees; and (3) component D: the wood sawdust and crop straw are included, and the weight ratio of the wood sawdust to the crop straw is 1: 1-1: 2; and (3) component E: the composite material comprises micron activated carbon powder, Rohm and Haas 1124 dispersing agent and water, and the weight ratio of the micron activated carbon powder to the Rohm and Haas 1124 dispersing agent to the water is 10-15: 5-10: 180-220. The agent is an environment-friendly agent, has no secondary pollution when used for in-situ remediation of the petroleum hydrocarbon polluted soil, is green and environment-friendly, and can achieve the rapid, efficient and stable remediation effect.
Description
Technical Field
The invention relates to the technical field of petroleum hydrocarbon polluted soil remediation, and particularly relates to a medicament for in-situ remediation of petroleum hydrocarbon polluted soil, and a preparation method and application thereof.
Background
With the rapid development of economy in China, petroleum becomes a main energy source in China, the demand is increasing day by day, and the petroleum inevitably generates blowout and leakage in the processes of exploitation, processing, storage and transportation to cause the overflow and discharge of petroleum hydrocarbons, so that the pollution to soil is serious day by day, the area is enlarged continuously, and the petroleum is absorbed by plants. At present, more than 400 oil fields are explored and developed in China, and the area of a covered area reaches 32 ten thousand square kilometers.
The petroleum pollution of the soil is mostly concentrated on the surface layer of 20cm, the permeability of the soil is influenced, the respiration and the absorption of plant root systems are directly hindered, the root systems are rotten, and the growth of the plant root systems is influenced. The reaction group rich in petroleum can combine with inorganic nitrogen and phosphorus and limit nitrification and dephosphorylation, so that the content of effective nitrogen and phosphorus in soil is reduced, and the nutrient absorption of crops is influenced. Petroleum products contain considerable amounts of phenols, organic chlorine, and the like in addition to aliphatic hydrocarbons and aromatic hydrocarbons. Research has shown that many organic pollutants have carcinogenic, teratogenic, mutagenic "triprodogenic effects". Serious contamination of soil can cause certain components of petroleum hydrocarbon to accumulate in grains, affect grain safety and damage human safety through a food chain. Most organic pollutants are difficult to remove in soil environments through natural degradation processes, and will persist and accumulate for a long time. In order to protect the soil environment, it is very important to enhance the remediation and treatment of the soil polluted by petroleum hydrocarbon.
Petroleum pollutants are easily attached to soil particles due to poor water solubility. Over time, petroleum hydrocarbons remain in the soil primarily in a bound state, which is difficult to remove from the soil by conventional remediation techniques. Currently, the main remediation methods for petroleum hydrocarbon contaminated soil include physical remediation, chemical remediation and biological remediation. The physical remediation technology is rapid in remediation and suitable for remediation of high-concentration petroleum-polluted soil, but has the problems of large capital investment, high energy consumption, incomplete pollutant elimination and secondary pollution. The chemical remediation technology has the advantages of complex process, long flow, high treatment cost, high chemical solvent cost and easy secondary pollution, and only treats the soil with high oil contamination under emergency conditions. The bioremediation technology has the characteristics of non-destructiveness, economy and safety, and is considered as the optimal selection for remedying the polluted soil, but the bioremediation technology has long remediation period and a plurality of influence factors, generally adopted strains have poor resistance to the environment, a pesticide must be thrown to adjust the pH value of the soil at most times, and a plurality of microorganisms are required to construct flora for synergistic action to remove petroleum hydrocarbon, so the bioremediation technology is rarely used alone at present, and is usually combined with other remediation technologies.
Disclosure of Invention
The invention mainly aims to provide a medicament for in-situ remediation of petroleum hydrocarbon contaminated soil, a preparation method and application thereof, so that the remediation of the petroleum hydrocarbon contaminated soil is more effective, free of secondary pollution, economical and practical.
In order to achieve the above objects, according to one aspect of the present invention, there is provided an agent for in situ remediation of petroleum hydrocarbon contaminated soil, comprising: and (2) component A: the fertilizer comprises, by weight, 10-15 parts of urea, 10-15 parts of monopotassium phosphate phosphorus-potassium compound fertilizer, 5-8 parts of potassium magnesium sulfate fertilizer and 100 parts of water; and (B) component: a powder liquid of rotten fruits; and (3) component C: crushed deciduous leaves of fruit trees and/or deciduous leaves of broad-leaved trees; and (3) component D: the wood sawdust and crop straw are included, and the weight ratio of the wood sawdust to the crop straw is 1: 1-1: 2; and (3) component E: the composite material comprises micron activated carbon powder, Rohm and Haas 1124 dispersing agent and water, and the weight ratio of the micron activated carbon powder to the Rohm and Haas 1124 dispersing agent to the water is 10-15: 5-10: 180-220.
Furthermore, the weight ratio of the component A, the component B, the component C, the component D and the component E is (15-30): (20-50): (50-80): (100-150): 5-10).
Further, the rotten fruit in component B comprises one or more of rotten apple, rotten pear, rotten citrus, rotten grape and rotten peach.
Further, the fruit tree fallen leaves are one or more of apple tree fallen leaves, pear tree fallen leaves, citrus tree fallen leaves, peach tree fallen leaves and plum tree fallen leaves; the deciduous leaf of broad-leaved tree is one or more of deciduous leaf of Sophora japonica, deciduous leaf of Populus chinensis, deciduous leaf of willow, deciduous leaf of Ginkgo biloba, deciduous leaf of Ulmus pumila, and deciduous leaf of Ailanthus altissima.
Furthermore, the crop straw is one or more of corn, sorghum, wheat, reed, millet, rice, highland barley and hulless oat straw.
Further, in the component C, the particle size of the crushed material is below 50 meshes; in the component D, the particle sizes of the wood sawdust and the crop straw are below 1 cm.
Furthermore, the micron activated carbon powder is a hard shell type shell micron activated carbon powder, and the particle size of the micron activated carbon powder is 0.5-15 microns.
According to another aspect of the invention, the preparation method of the agent for in-situ remediation of the petroleum hydrocarbon contaminated soil is also provided, and the agent for in-situ remediation of the petroleum hydrocarbon contaminated soil is obtained by mixing the component A, the component B, the component C, the component D and the component E.
According to another aspect of the present invention, there is also provided a method for in situ remediation of a petroleum hydrocarbon contaminated soil, comprising: the agent for in-situ remediation of the soil polluted by the petroleum hydrocarbon is used for in-situ remediation of the soil polluted by the petroleum hydrocarbon.
Further, the method comprises the following steps: irrigating and airing the petroleum hydrocarbon polluted soil to enable the water holding capacity of the petroleum hydrocarbon polluted soil to reach about 90% of the field water holding capacity, applying the agent for in-situ remediation of the petroleum hydrocarbon polluted soil to the surface of the soil according to the amount of 500-1000 kg/mu under the condition that the daily average air temperature is higher than 10 ℃, carrying out rotary tillage for more than 2 times, then intermittently irrigating to enable the water holding capacity to be kept at more than 80% of the field water holding capacity, and keeping for 2-3 months.
The agent provided by the invention comprises a component A, a component B, a component C, a component D and a component E, which are all environment-friendly agents, has no secondary pollution when in-situ remediation is carried out on the petroleum hydrocarbon polluted soil, is green and environment-friendly, and can achieve the rapid, efficient and stable remediation effect. Meanwhile, the medicament has the advantages of low cost, easy application, short time consumption, good effect and universal equipment, and compared with other technologies, the medicament is economical and practical and can be widely popularized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a graph of petroleum hydrocarbon concentration over time according to example 1 of the present invention;
FIG. 2 shows a graph of petroleum hydrocarbon concentration over time according to example 2 of the present invention;
FIG. 3 shows a graph of petroleum hydrocarbon concentration over time according to example 3 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As described in the background section, the prior art has failed to repair or work well on petroleum hydrocarbon contaminated soil, or has secondary contamination, or is costly. In order to solve the problem, the invention provides an agent for in-situ remediation of petroleum hydrocarbon contaminated soil, which comprises: and (2) component A: the fertilizer comprises, by weight, 10-15 parts of urea, 10-15 parts of monopotassium phosphate phosphorus-potassium compound fertilizer, 5-8 parts of potassium magnesium sulfate fertilizer and 100 parts of water; and (B) component: a powder liquid of rotten fruits; and (3) component C: crushed deciduous leaves of fruit trees and/or deciduous leaves of broad-leaved trees; and (3) component D: the wood sawdust and crop straw are included, and the weight ratio of the wood sawdust to the crop straw is 1: 1-1: 2; and (3) component E: the composite material comprises micron activated carbon powder, Rohm and Haas 1124 dispersing agent and water, and the weight ratio of the micron activated carbon powder to the Rohm and Haas 1124 dispersing agent to the water is 10-15: 5-10: 180-220.
The urea, the monopotassium phosphate-potassium high-efficiency compound fertilizer and the potash magnesium sulphate fertilizer belong to common soil fertilizers, contain rich N, P, K, Mg, Ca, Fe and other elements, can rapidly supplement effective nutrient elements of soil, improve the soil fertility, provide nutrients necessary for survival and propagation of indigenous petroleum hydrocarbon degrading bacteria in polluted soil, and enable the indigenous petroleum hydrocarbon degrading bacteria to more rapidly degrade petroleum hydrocarbon, so that the aim of repairing the soil is achieved. The rotten fruits contain various moulds, provide good symbiotic bacteria for petroleum degrading bacteria and are beneficial to the degradation of petroleum hydrocarbon. The rotten fruit pulp can be used as a surfactant to desorb petroleum hydrocarbon from soil, and can provide nutrients necessary for the survival of petroleum degrading bacteria to accelerate the degradation of the petroleum hydrocarbon. And the fertilizers, fruit pulp, leaves, sawdust and straws have different decay and degradation rates, and can continuously provide good carbon sources, nitrogen, phosphorus, potassium and other nutrient elements for the growth of degrading bacteria.
The micron-sized activated carbon powder using the Rohm and Haas 1124 dispersant is added, so that high-concentration petroleum hydrocarbon in the soil solution can be quickly adsorbed, the biotoxicity of the petroleum hydrocarbon can be reduced, and the degrading bacteria and the symbiotic bacteria can smoothly grow. The activated carbon powder can form a microenvironment beneficial to the growth of microorganisms through the effects of absorbing nutrient substances, loosening soil, improving soil fertility, improving soil water storage and ventilation capacity and the like, so that the degrading bacteria are attached to the surface of the activated carbon powder, and the petroleum hydrocarbon absorbed by the carbon powder is degraded more quickly. And Rohm and Ha 1124 can improve the dispersibility of activated carbon powder of micron in solution, make activated carbon powder of micron distribute in medicament and soil more evenly, give play to its absorption effect better (Rohm and Ha 1124 is a dispersant for emulsion paint, its main component is polyacrylic acid ammonium salt, the molecular weight is 14636, the commonality is good, it has good dispersing properties to activated carbon powder of micron to prove its experiment.
The urea, the monopotassium phosphate system phosphorus-potassium high-efficiency compound fertilizer and the potassium magnesium sulfate fertilizer are all agricultural fertilizers sold on the market, and the brand is not limited. In a preferred embodiment, the weight ratio of component A, component B, component C, component D and component E is (15-30): 20-50): 50-80): 100-150): 5-10. The proportion of each component is controlled within the range, so that the nutrient elements can be better provided for the petroleum degrading bacteria continuously.
In a preferred embodiment, the decayed fruit of component B includes, but is not limited to, one or more of decayed apples, decayed pears, decayed citrus fruits, decayed grapes, decayed peaches. In order to save cost, different fruits in the current season are selected and collected according to specific implementation seasons, and waste is avoided. More preferably, the fruit tree fallen leaves include, but are not limited to, one or more of apple tree fallen leaves, pear tree fallen leaves, citrus tree fallen leaves, peach tree fallen leaves, and plum tree fallen leaves; the deciduous leaf of broad-leaved tree is one or more of deciduous leaf of Sophora japonica, deciduous leaf of Populus chinensis, deciduous leaf of willow, deciduous leaf of Ginkgo biloba, deciduous leaf of Ulmus pumila, and deciduous leaf of Ailanthus altissima. In the practical application process, the fallen leaves of the broad-leaved trees can be selected according to seasons.
Preferably, the wood sawdust can be wood waste left in the daily production process of a wood factory or a furniture factory, and the selected straw is crop straw or reed straw in the season, and the straw is crushed to the particle size of below 1 cm. Preferably, the crop straws are one or more of corn, sorghum, wheat, reed, millet, rice, highland barley and hulless oat straws. In a preferred embodiment, in component C, the particle size of the pulverized material is 50 mesh or less; in the component D, the particle sizes of the wood sawdust and the crop straw are below 1 cm.
Preferably, the micron activated carbon powder is a hard shell type micron activated carbon powder, and the particle size of the micron activated carbon powder is 0.5-15 microns. The hard shell can be coconut shell, peach kernel, apricot kernel, etc.
According to another aspect of the invention, the preparation method of the agent for in-situ remediation of the petroleum hydrocarbon contaminated soil is also provided, and the agent for in-situ remediation of the petroleum hydrocarbon contaminated soil is obtained by mixing the component A, the component B, the component C, the component D and the component E.
The following are particularly preferred:
and (2) component A: 10-15 parts of urea, 10-15 parts of monopotassium phosphate phosphorus-potassium efficient compound fertilizer and 5-8 parts of potassium magnesium sulfate fertilizer are dissolved in 100 parts of water to prepare A base liquid.
And (B) component: crushing rotten fruits such as apple, pear and orange into pulp B;
and (3) component C: crushing deciduous leaves of fruit trees such as apple, pear, orange and the like or deciduous leaves of other similar broad-leaved trees to ensure that the particle size is below 50 meshes and is marked as C;
and (3) component D: mixing miscellaneous tree sawdust with crop straws crushed into grains with the grain diameter of less than 1cm, such as corn, sorghum, wheat or reed, and the like according to a ratio of 1:1 to prepare a mixture D;
and (3) component E: mixing the micron activated carbon powder, Rohm and Haas 1124 dispersant and tap water according to the weight ratio of 12:7:200 to prepare a mixture E;
medicament: a, B, C, D prepared by the steps and the medicament E are mixed according to the weight ratio of 15-30: 20-50: 50-80: 100-150: 5-10, and the repairing medicament F is obtained after the mixture is fully and uniformly stirred.
According to another aspect of the present invention, there is also provided a method for in situ remediation of a petroleum hydrocarbon contaminated soil, comprising: the agent for in-situ remediation of the soil polluted by the petroleum hydrocarbon is used for in-situ remediation of the soil polluted by the petroleum hydrocarbon.
Preferably, the method comprises the following steps: irrigating and airing the petroleum hydrocarbon polluted soil to enable the water holding capacity of the petroleum hydrocarbon polluted soil to reach about 90% of the field water holding capacity, applying the agent for in-situ remediation of the petroleum hydrocarbon polluted soil to the surface of the soil according to the amount of 500-1000 kg/mu under the condition that the daily average air temperature is higher than 10 ℃, carrying out rotary tillage for more than 2 times, then intermittently irrigating to enable the water holding capacity to be kept at more than 80% of the field water holding capacity, and keeping for 2-3 months. The optimized field water holding capacity and temperature also provide important growth conditions for the degrading bacteria. The repairing effect is better when the medicament is applied under the conditions.
The plowing equipment used in the process of applying the agent is universal with agricultural equipment, and the agent can be suitable for various soils.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1:
a1, dissolving 2kg of urea, 2kg of monopotassium phosphate phosphorus-potassium high-efficiency compound fertilizer and 1kg of potash magnesium sulphate fertilizer in 20kg of water to prepare a base solution A.
A2, collecting 30kg of rotten apples and pears, and grinding the apples and pears into slurry B;
a3, collecting 100kg of fallen leaves of apple trees and pear trees, drying in the sun, and crushing to obtain powder with the particle size of less than 50 meshes, which is marked as C;
a4, collecting 100kg of miscellaneous tree sawdust from a wood factory, collecting 100kg of waste corn and sorghum straws from a farmland, crushing the waste corn and sorghum straws into crushed residues with the particle size of less than 1cm, and mixing the crushed residues and the crushed residues to prepare a mixture D;
a5, dissolving 0.06kg of micron activated carbon powder and 0.035kg of Rohm and Haas 1124 dispersant in 10 kg of water, mixing to obtain mixture E;
a6, mixing A, B, C, D and E prepared in the steps, and fully and uniformly stirring to obtain a repairing medicament F;
a7, repairing 3 mu of polluted soil with petroleum hydrocarbon concentration of 2g/kg, irrigating and airing the soil polluted by petroleum hydrocarbon to enable the field water-holding capacity to reach 90%, applying a repairing agent F to the surface of the soil according to the amount of 800 kg/mu under the condition that the daily average temperature is 22 ℃, carrying out rotary tillage for 2 times, then intermittently irrigating to enable the field water-holding capacity to be kept at 80%, maintaining for 60 days, and reducing the concentration of petroleum hydrocarbon in the soil to 147mg/kg, thereby achieving a good repairing effect. The time-varying curve of the petroleum hydrocarbon concentration is shown in figure 1.
Example 2:
a1, dissolving 2kg of urea, 2kg of monopotassium phosphate phosphorus-potassium high-efficiency compound fertilizer and 1.5kg of potash magnesium sulphate fertilizer in 15kg of water to prepare a base solution A.
A2, collecting 70kg of rotten apples and pears, and grinding the apples and pears into slurry B;
a3, collecting 150kg of fallen leaves of apple trees and pear trees, and marking the fallen leaves as C when the particle size is 50 meshes;
a4, collecting 80kg of miscellaneous tree sawdust from a wood factory, collecting 80kg of waste corn and sorghum straws from a farmland, crushing the waste corn and sorghum straws into crushed residues with the particle size of less than 1cm, and mixing the crushed residues and the crushed residues to prepare a mixture D;
a5, adding 0.18kg of micron activated carbon powder and 0.1kg of Rohm and Haas 1124 dispersant into 11 kg of tap water, and stirring to prepare a mixture E;
a6, mixing A, B, C, D and E prepared in the steps, and fully and uniformly stirring to obtain a repairing medicament F;
a7, repairing contaminated soil with 5 mu of petroleum hydrocarbon concentration of 2.5g/kg, irrigating and airing the petroleum hydrocarbon contaminated soil to enable the field water-holding capacity to reach 95%, applying a repairing agent F to the soil surface according to the amount of 1000 kg/mu under the condition that the daily average temperature is 20 ℃, carrying out rotary tillage for 2 times, then carrying out intermittent irrigation to enable the field water-holding capacity to be kept at 85%, maintaining for 80 days, and reducing the concentration of the petroleum hydrocarbon in the soil to 116mg/kg, thereby achieving a good repairing effect. The time-dependent change of the petroleum hydrocarbon concentration is shown in figure 2.
Example 3:
a1, dissolving 3kg of urea, 3kg of monopotassium phosphate phosphorus-potassium high-efficiency compound fertilizer and 2kg of potash magnesium sulphate fertilizer in 30kg of water to prepare base liquid.
A2, collecting 60kg of rotten apples and pears, and grinding the apples and pears into slurry B;
a3, collecting 120kg of fallen leaves of apple trees and pear trees, and marking the fallen leaves as C when the particle size is 50 meshes;
a4, collecting 100kg of miscellaneous tree sawdust from a wood factory, collecting 100kg of waste corn and sorghum straws from a farmland, crushing the waste corn and sorghum straws into crushed residues with the particle size of less than 1cm, and mixing the crushed residues and the crushed residues to prepare a mixture D;
a5, dissolving 0.24kg of micron activated carbon powder and 0.14kg of Rohm and Haas 1124 dispersant in 12 kg of tap water to prepare a mixture E;
a6, mixing A, B, C, D and E prepared in the steps, and fully and uniformly stirring to obtain a repairing medicament F;
a7, repairing the polluted soil with the petroleum hydrocarbon concentration of 2.0g/kg for 3 mu, irrigating and airing the polluted soil with the petroleum hydrocarbon to enable the field water-holding capacity to reach 95%, applying a repairing agent F to the surface of the soil according to the amount of 900 kg/mu under the condition that the daily average temperature is 15 ℃, carrying out rotary tillage for 2 times, then carrying out intermittent irrigation to enable the field water-holding capacity to be kept at 85%, maintaining for 70 days, and reducing the concentration of the petroleum hydrocarbon in the soil to 197mg/kg, thereby achieving a good repairing effect. The time-dependent change of the petroleum hydrocarbon concentration is shown in figure 3.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An agent for in-situ remediation of petroleum hydrocarbon contaminated soil, comprising:
and (2) component A: the fertilizer comprises, by weight, 10-15 parts of urea, 10-15 parts of monopotassium phosphate phosphorus-potassium compound fertilizer, 5-8 parts of potassium magnesium sulfate fertilizer and 100 parts of water;
and (B) component: a powder liquid of rotten fruits;
and (3) component C: crushed deciduous leaves of fruit trees and/or deciduous leaves of broad-leaved trees;
and (3) component D: the wood sawdust and crop straw are included, and the weight ratio of the wood sawdust to the crop straw is 1: 1-1: 2;
and (3) component E: the composite material comprises micron activated carbon powder, Rohm and Haas 1124 dispersing agent and water, and the weight ratio of the micron activated carbon powder to the Rohm and Haas 1124 dispersing agent to the water is 10-15: 5-10: 180-220.
2. The agent for in situ remediation of petroleum hydrocarbon contaminated soil as claimed in claim 1, wherein the weight ratio of the component A, the component B, the component C, the component D and the component E is (15-30): 20-50): 50-80): 100-150): 5-10.
3. An agent for in situ remediation of petroleum hydrocarbon contaminated soil according to claim 1 or claim 2, wherein said rotten fruit of component B comprises one or more of rotten apples, rotten pears, rotten citrus, rotten grapes, rotten peaches.
4. The agent for in situ remediation of petroleum hydrocarbon contaminated soil as claimed in claim 1 or 2, wherein said fruit tree fallen leaves are one or more of apple tree fallen leaves, pear tree fallen leaves, citrus tree fallen leaves, peach tree fallen leaves, plum tree fallen leaves; the deciduous leaf of broad-leaved tree is one or more of deciduous leaf of Sophora japonica, deciduous leaf of Populus chinensis, deciduous leaf of willow, deciduous leaf of Ginkgo biloba, deciduous leaf of Ulmus pumila, and deciduous leaf of Ailanthus altissima.
5. The agent for in-situ remediation of petroleum hydrocarbon contaminated soil as claimed in claim 1 or claim 2, wherein the crop straw is one or more of corn, sorghum, wheat, reed, millet, rice, highland barley, and hulless oat straw.
6. An agent for in situ remediation of petroleum hydrocarbon contaminated soil as claimed in claim 1 or claim 2, wherein in component C, the size of the pulverizate is 50 mesh or less; in the component D, the particle sizes of the wood sawdust and the crop straws are below 1 cm.
7. The agent for in-situ remediation of petroleum hydrocarbon contaminated soil as claimed in claim 1 or 2, wherein the micron activated carbon powder is a hard shell micron activated carbon powder, and the particle size of the micron activated carbon powder is 0.5-15 μm.
8. The preparation method of the agent for in-situ remediation of petroleum hydrocarbon contaminated soil as claimed in any one of claims 1 to 7, wherein the agent for in-situ remediation of petroleum hydrocarbon contaminated soil is obtained by mixing component A, component B, component C, component D and component E.
9. An in-situ remediation method for petroleum hydrocarbon contaminated soil, characterized in that the agent for in-situ remediation of petroleum hydrocarbon contaminated soil according to any one of claims 1 to 7 is used for in-situ remediation of the petroleum hydrocarbon contaminated soil.
10. The in situ remediation method of petroleum hydrocarbon contaminated soil of claim 9, comprising the steps of:
and (2) irrigating and airing the petroleum hydrocarbon polluted soil to ensure that the water holding capacity of the petroleum hydrocarbon polluted soil reaches about 90% of the field water holding capacity, applying the agent for in-situ remediation of the petroleum hydrocarbon polluted soil to the surface of the soil according to the amount of 500-1000 kg/mu under the condition that the daily average air temperature is higher than 10 ℃, carrying out rotary tillage for more than 2 times, and then carrying out intermittent irrigation to ensure that the water holding capacity is kept at more than 80% of the field water holding capacity and is kept for 2-3 months.
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