CN111957726A - In-situ combined remediation method for petroleum-polluted soil - Google Patents
In-situ combined remediation method for petroleum-polluted soil Download PDFInfo
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- CN111957726A CN111957726A CN202010712258.XA CN202010712258A CN111957726A CN 111957726 A CN111957726 A CN 111957726A CN 202010712258 A CN202010712258 A CN 202010712258A CN 111957726 A CN111957726 A CN 111957726A
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- 239000002689 soil Substances 0.000 title claims abstract description 84
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005067 remediation Methods 0.000 title claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 32
- 239000003208 petroleum Substances 0.000 claims abstract description 31
- 239000007800 oxidant agent Substances 0.000 claims abstract description 20
- 230000001590 oxidative effect Effects 0.000 claims abstract description 20
- 238000009264 composting Methods 0.000 claims abstract description 18
- 210000003608 fece Anatomy 0.000 claims abstract description 18
- 239000010871 livestock manure Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 230000003213 activating effect Effects 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 8
- 239000003623 enhancer Substances 0.000 claims description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical group [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 231100000719 pollutant Toxicity 0.000 claims description 6
- 239000004343 Calcium peroxide Substances 0.000 claims description 5
- 241000196324 Embryophyta Species 0.000 claims description 5
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 claims description 5
- 235000019402 calcium peroxide Nutrition 0.000 claims description 5
- 244000005700 microbiome Species 0.000 claims description 5
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 239000011790 ferrous sulphate Substances 0.000 claims description 4
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 238000012258 culturing Methods 0.000 claims description 3
- 230000000593 degrading effect Effects 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 229960002089 ferrous chloride Drugs 0.000 claims description 3
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- 230000002262 irrigation Effects 0.000 claims description 3
- 238000003973 irrigation Methods 0.000 claims description 3
- 244000144972 livestock Species 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 244000144977 poultry Species 0.000 claims description 3
- 239000012744 reinforcing agent Substances 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 11
- 238000003900 soil pollution Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 239000012190 activator Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical class [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002680 soil gas Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Mycology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to an in-situ combined remediation method for petroleum polluted soil. The method comprises the following steps: the method comprises the steps of adding a reinforcer into in-situ petroleum polluted soil, uniformly mixing, then sequentially adding an activating agent and a chemical oxidant, uniformly mixing, and performing chemical oxidation treatment; (2) and (3) adding a proper amount of clean soil and farmyard manure in the peripheral area of the petroleum-polluted soil into the petroleum-polluted soil after chemical oxidation treatment, uniformly mixing, and then performing composting treatment. Experiments show that the petroleum polluted soil can be safely recycled after being treated by adopting the method; the invention can also be used for treating oil-bearing rock debris in the drilling of low-concentration oil and gas fields.
Description
Technical Field
The invention relates to a petroleum polluted soil treatment technology, in particular to an in-situ combined remediation method for petroleum polluted soil.
Background
With the development of modern society, the negative effects of soil pollution are increasingly prominent, and the soil pollution becomes a global environmental problem. The 2014 national soil pollution condition survey bulletin shows that the national soil environment condition is not optimistic overall, and the total exceeding rate of the soil point position is 16.1%; for the oil production area, out of 494 soil point positions of 13 oil production areas under investigation, the overproof point position accounts for 23.6%, and the main pollutants are petroleum hydrocarbon and polycyclic aromatic hydrocarbon. Obviously, petroleum pollution has become one of the main forms of soil environment pollution in China, and the soil environment of partial areas has been deteriorated to the unrecoverable edge. At least 3000 million hectares of polluted land exists in China so far, wherein the area of the petroleum polluted soil is as high as 500 million hectares. Therefore, how to repair the soil polluted by petroleum and make soil pollution control attack and fight against the attack and the solidness becomes a hotspot of research in the field at present.
For the remediation of polluted soil, developed countries form a series of mature technologies as early as 90 years of the 20 th century, and the remediation work of soil pollution in China just starts at the moment, so that a large gap exists between the fields of relevant theoretical research, technical research and development and industrialization. However, with the continuous innovation development of the last two decades, China obtains a happy result in the aspect of soil pollution remediation, wherein the technologies of organic polluted soil gas extraction, thermal desorption and biological (ventilation) pile, heavy metal polluted soil solidification/stabilization, oxidation/reduction regulation and the like are relatively mature, and industrialization is realized; technologies such as in-situ oxidation and bioremediation of organic contaminated soil, chemical cleaning of heavy metal contaminated soil, plant extraction and the like are gradually mature, and the method begins to enter an industrialization stage, but the method also has the defects of long bioremediation time, certain selectivity and the like; a great deal of research work has been carried out on the physicochemical enhanced remediation and chemical leaching technology of the organic contaminated soil and the heavy metal plant barrier and electrodynamics remediation technology. The activated persulfate is an advanced oxidation technology based on sulfate free radicals (SO 4- ·, E0= 2.6V) in-situ oxidation of organic polluted soil, has the advantages of high stability, good water solubility, strong oxidability, friendly reaction products and the like, forms various mature repair equipment and persulfate preparations abroad, is widely applied, and is in a research stage in China. The method for in-situ obtaining indigenous microorganisms through composting treatment is the most promising environmental management technology due to no secondary pollution, is also the first choice method of petroleum pollution, but has longer remediation period, can overcome the problems by combining with the activated persulfate oxidation technology, and has gradually become a hot spot at home and abroad in relevant research and very broad market prospect in the future.
Disclosure of Invention
The invention aims to provide an in-situ combined remediation method for petroleum-polluted soil.
In order to achieve the purpose, the technical scheme of the invention is as follows: an in-situ combined remediation method for petroleum-polluted soil, which is characterized by comprising the following steps: comprises the following steps:
adding a reinforcer into the in-situ petroleum polluted soil, uniformly mixing, sequentially adding an activating agent and a chemical oxidant, uniformly mixing, and performing chemical oxidation treatment;
wherein the chemical oxidant is one of sodium persulfate and potassium persulfate; the activating agent is ferrous salt capable of providing ferrous ions, and comprises ferrous sulfate, ferrous chloride and the like; the enhancer is one of calcium peroxide, calcium oxide, calcium hydroxide and sodium hydroxide; the molar ratio of the chemical oxidant to the activating agent is (0.7-6): 1, and the dosage of the reinforcing agent is 1-3% of the total dosage of the chemical oxidant and the activating agent;
adding a proper amount of clean soil and farmyard manure in the peripheral area of the petroleum-polluted soil into the petroleum-polluted soil after chemical oxidation treatment, uniformly mixing, and performing composting treatment for 25-45 d;
wherein the clean soil is the soil with the surface layer of 0-40 cm for agricultural use; the farmyard manure is a mixture of the crushed crop straws in the season, the weeds around the farm land and the livestock and poultry manure after composting and fermentation for 5-10 days; the weight ratio of the clean soil to the petroleum polluted soil is (0.5-2): 1, and the using amount of the farmyard manure is 3-8% of the total weight of the clean soil and the petroleum polluted soil.
The enhancer, the activating agent and the chemical oxidant can be sequentially added into the soil polluted by petroleum in a drip irrigation mode.
And (3) performing composting for 25-45 d, wherein in the period, the mixture consisting of the petroleum polluted soil, the clean soil and the farmyard manure needs to be subjected to watering (1-2 times per day, the humidity is kept at about 80%), ploughing (1-2 times per day), and ventilation and temperature control (intermittent ventilation, the temperature is kept at about 25 ℃).
And performing composting treatment for 25-45 days, and culturing and obtaining indigenous microorganisms capable of degrading petroleum pollutants in soil through composting treatment.
The method has the following advantages:
(1) the in-situ effective treatment and recycling safe utilization of the petroleum polluted soil are realized, and the defects of the single treatment technology are overcome;
(2) the addition of the strengthening agents such as calcium peroxide, calcium oxide, calcium hydroxide, sodium hydroxide and the like further improves the utilization efficiency of the chemical oxidant and enhances the removal rate of petroleum pollutants in the soil;
(3) the addition of farmyard manure and clean soil provides more favorable conditions for the acquisition and growth of in-situ indigenous microorganisms;
(4) the related technology can be used for treating oil-bearing rock debris of drilling of low-concentration (the mass concentration of the petroleum pollutants is 10% or less) oil and gas fields after being optimized and adjusted.
Drawings
FIG. 1 is a process flow diagram of an in-situ combined remediation method for petroleum-contaminated soil.
Detailed Description
The technical scheme of the invention is as follows: an in-situ combined remediation method for petroleum-polluted soil, which is characterized by comprising the following steps: comprises the following steps:
adding a reinforcer into the in-situ petroleum polluted soil, uniformly mixing, sequentially adding an activating agent and a chemical oxidant, uniformly mixing, and performing chemical oxidation treatment;
wherein the chemical oxidant is one of sodium persulfate and potassium persulfate; the activating agent is ferrous salt capable of providing ferrous ions, and comprises ferrous sulfate, ferrous chloride and the like; the enhancer is one of calcium peroxide, calcium oxide, calcium hydroxide and sodium hydroxide; the molar ratio of the chemical oxidant to the activating agent is (0.7-6): 1, and the dosage of the reinforcing agent is 1-3% of the total dosage of the chemical oxidant and the activating agent;
adding a proper amount of clean soil and farmyard manure in the peripheral area of the petroleum-polluted soil into the petroleum-polluted soil after chemical oxidation treatment, uniformly mixing, and performing composting treatment for 25-45 d;
wherein the clean soil is the soil with the surface layer of 0-40 cm for agricultural use; the farmyard manure is a mixture of the crushed crop straws in the season, the weeds around the farm land and the livestock and poultry manure after composting and fermentation for 5-10 days; the weight ratio of the clean soil to the petroleum polluted soil is (0.5-2): 1, and the using amount of the farmyard manure is 3-8% of the total weight of the clean soil and the petroleum polluted soil.
The enhancer, the activating agent and the chemical oxidant can be sequentially added into the soil polluted by petroleum in a drip irrigation mode.
And (3) performing composting for 25-45 d, wherein in the period, the mixture consisting of the petroleum polluted soil, the clean soil and the farmyard manure needs to be subjected to watering (1-2 times per day, the humidity is kept at about 80%), ploughing (1-2 times per day), and ventilation and temperature control (intermittent ventilation, the temperature is kept at about 25 ℃).
And performing composting treatment for 25-45 days, and culturing and obtaining indigenous microorganisms capable of degrading petroleum pollutants in soil through composting treatment.
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited to these examples.
Example 1: adding an enhancer calcium peroxide with the dosage of 1 percent of the total dosage of the chemical oxidant and the activator into the petroleum polluted soil, sequentially adding an activator ferrous sulfate and a chemical oxidant sodium persulfate (the molar ratio of the chemical oxidant to the activator is 0.7: 1) after in-situ mixing uniformly, and mixing uniformly for chemical oxidation treatment; adding clean soil (the weight ratio of the clean soil to the petroleum-polluted soil is 1: 1) and farmyard manure (the dosage is 6 percent of the total weight of the clean soil and the petroleum-polluted soil) into the petroleum-polluted soil after chemical oxidation treatment, uniformly mixing, performing composting treatment for 25 d, spraying water (1 time per day, the humidity is kept at about 80%), ploughing (1 time per day), ventilating and controlling the temperature (intermittent ventilation, the temperature is kept at about 25 ℃), and safely recycling the treated petroleum-polluted soil.
Claims (4)
1. An in-situ combined remediation method for petroleum-polluted soil, which is characterized by comprising the following steps: comprises the following steps:
the method comprises the steps of adding a reinforcer into in-situ petroleum polluted soil, uniformly mixing, then sequentially adding an activating agent and a chemical oxidant, and uniformly mixing for chemical oxidation treatment;
wherein the chemical oxidant is one of sodium persulfate and potassium persulfate; the activating agent is ferrous salt capable of providing ferrous ions, and comprises ferrous sulfate, ferrous chloride and the like; the enhancer is one of calcium peroxide, calcium oxide, calcium hydroxide and sodium hydroxide; the molar ratio of the chemical oxidant to the activating agent is (0.7-6): 1, and the dosage of the reinforcing agent is 1-3% of the total dosage of the chemical oxidant and the activating agent;
secondly, adding a proper amount of clean soil and farmyard manure in the peripheral area of the petroleum-polluted soil into the petroleum-polluted soil after chemical oxidation treatment, and composting for 25-45 d after uniform mixing;
wherein the clean soil is the soil with the surface layer of 0-40 cm for agricultural use; the farmyard manure is a mixture of the crushed crop straws in the season, the weeds around the farm land and the livestock and poultry manure after composting and fermentation for 5-10 days; the weight ratio of the clean soil to the petroleum polluted soil is (0.5-2): 1, and the using amount of the farmyard manure is 3-8% of the total weight of the clean soil and the petroleum polluted soil.
2. The in-situ combined remediation method for petroleum-contaminated soil according to claim 1, wherein the in-situ combined remediation method comprises the following steps: the enhancer, the activating agent and the chemical oxidant can be sequentially added into the soil polluted by petroleum in a drip irrigation mode.
3. The in-situ combined remediation method for petroleum-contaminated soil according to claim 1, wherein the in-situ combined remediation method comprises the following steps: and (3) performing composting for 25-45 d, wherein in the period, the mixture consisting of the petroleum polluted soil, the clean soil and the farmyard manure needs to be subjected to watering (1-2 times per day, the humidity is kept at about 80%), ploughing (1-2 times per day), and ventilation and temperature control (intermittent ventilation, the temperature is kept at about 25 ℃).
4. The in-situ combined remediation method for petroleum-contaminated soil according to claim 1, wherein the in-situ combined remediation method comprises the following steps: and performing composting treatment for 25-45 days, and culturing and obtaining indigenous microorganisms capable of degrading petroleum pollutants in soil through composting treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010712258.XA CN111957726A (en) | 2020-07-22 | 2020-07-22 | In-situ combined remediation method for petroleum-polluted soil |
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| CN202010712258.XA CN111957726A (en) | 2020-07-22 | 2020-07-22 | In-situ combined remediation method for petroleum-polluted soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070333A (en) * | 2021-03-18 | 2021-07-06 | 东南大学 | Cooperative thermal desorption combined vacuum remediation method for petroleum hydrocarbon contaminated soil |
| CN113647223A (en) * | 2021-08-02 | 2021-11-16 | 中煤科工集团北京土地整治与生态修复科技研究院有限公司 | Method for improving soil in high and cold plateau coal mine area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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