CN115625193A - Degradation method of refractory organics in soil and underground water - Google Patents
Degradation method of refractory organics in soil and underground water Download PDFInfo
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- CN115625193A CN115625193A CN202211100404.9A CN202211100404A CN115625193A CN 115625193 A CN115625193 A CN 115625193A CN 202211100404 A CN202211100404 A CN 202211100404A CN 115625193 A CN115625193 A CN 115625193A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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Abstract
A method for degrading refractory organic matters in soil and underground water belongs to the technical field of soil and underground water remediation, and solves the problems of low degradation rate and large medicament consumption of refractory organic matters such as benzene series, polycyclic aromatic hydrocarbon, petroleum hydrocarbon and the like in soil by the conventional chemical oxidation. The method comprises the following steps: adding a substance A and a substance B into polluted soil or underground water; adding A and B simultaneously, adding A first and then B, or adding B first and then A. The method comprises the following steps: adding a substance B and a substance C to the contaminated soil or groundwater; b and C are added simultaneously, B is added first and then C is added first or C is added first and then B is added. The method reduces the using amount of the oxidant, reduces the adsorption effect of the insoluble organic matters on the soil surface, obviously improves the removal rate of the pollutants which are difficult to degrade, such as petroleum hydrocarbon, polycyclic aromatic hydrocarbon and the like in the soil, ensures that the decomposition reaction of the pollutants is mild and long-acting, reduces the soil remediation cost, and weakens the acidification and damage of the oxidants, such as persulfate and the like, to the ecological conditions of the soil. Is suitable for degrading refractory organic matters in soil and underground water.
Description
Technical Field
The invention belongs to the technical field of soil and underground water remediation; in particular to a degradation method of refractory organics in soil and underground water.
Background
Many industrial production processes involve organic matters which are difficult to degrade, such as petroleum hydrocarbon, polycyclic aromatic hydrocarbon, benzene series, halogenated hydrocarbon and the like, soil and underground water are easy to pollute, for example, the bad treatment can harm the health and ecological safety of people, and the sustainable development and utilization of land are seriously restricted. At present, the remediation technology for organic contaminated soil at home and abroad generally has the problems of high treatment cost, high energy consumption, long remediation period, high concentration of residual pollutants, difficulty in deep soil remediation and the like, so that the economic burden of a treatment unit is remarkably increased, and the implementation of remediation engineering of a contaminated site is seriously influenced.
The biodegradability of benzene series, polycyclic aromatic hydrocarbon, petroleum hydrocarbon and halogenated hydrocarbon in soil is poor, so the bioremediation method has long common period and poor degradation effect. When the chemical oxidation technology is used for repairing soil polluted by benzene series, polycyclic aromatic hydrocarbon and petroleum hydrocarbon, the existing chemical oxidant has the problems of low pollutant removal rate, large medicament consumption, damage to soil environment and difficulty in dehalogenation of halogenated hydrocarbon, the existing soil chemical repairing agent has the removal rate of only 30% -50% of the action of polycyclic aromatic hydrocarbon, benzene series and petroleum hydrocarbon, the dehalogenation of halogenated hydrocarbon is lower than 30%, the treated high-concentration polluted soil still cannot reach the standard, and the existing soil chemical repairing agent has the advantages of short effective period, large consumption, high treatment cost and serious damage to soil ecology. Therefore, the development of an efficient soil remediation agent, the improvement of the pollutant removal effect, the reduction of the medicament consumption and the improvement of the halohydrocarbon degradation effect is a practical problem to be solved urgently at present.
Name: an iron-nitrogen co-doped nano carbon composite catalyst, a preparation method and application thereof are disclosed in the application number: 202111564406.9 discloses a biogas residue-based iron-nitrogen co-doped nano carbon composite catalyst, which realizes high content of petroleum-polluted soil while realizing resource utilization of biogas residuesEfficient and green restoration; the iron-nitrogen co-doped nano carbon material prepared in a laboratory is used as a catalyst to activate persulfate to treat organic contaminated soil, and the iron element in the prepared material is Fe 0 、Fe 3 C and FeN x And the like exist in the form of low-valence metal, and the Fe-based nano particles are uniformly dispersed in the pores of the porous carbon material, but the preparation process of the catalytic material is complex and the preparation cost is high. The excess impregnation method is used for preliminarily adding Fe in the preparation process of the catalyst 2+ Fixing on the surface of the carrier, and filtering out a large amount of Fe in the impregnation liquid 2+ Are not effectively utilized; and Fe 0 、Fe 3 C and FeN x The catalyst needs to undergo high-energy-consumption processes such as long-time freeze drying, high-temperature calcination under the protection of inert gas and the like during preparation, the energy consumption and the large material consumption of the technical process during the preparation process are high, the manufacturing cost is high, and the catalyst is neither economical nor environment-friendly. The catalyst is added in a solid powder mode, the catalytic material of the solid powder is difficult to effectively disperse in soil, the catalyst, the oxidant and the pollutant are not uniformly contacted, the mass transfer resistance is large, the oxidant consumption far exceeds the theoretical amount, and the adding amount of the persulfate and the catalytic powder is large. And the solid powder medicament has very limited moving and penetrating capability in soil, is intercepted and filtered by the soil, has short transmission distance and is not suitable for large-area pollution remediation by injecting deep soil and underground water.
Disclosure of Invention
The invention aims to solve the problems of low degradation rate and large medicament consumption of refractory organic matters such as benzene series, polycyclic aromatic hydrocarbon, petroleum hydrocarbon and the like in soil by the existing chemical oxidation, and provides a degradation method of the refractory organic matters in soil and underground water.
A degradation method of refractory organics in soil and underground water is characterized by that it adds a substance A and a substance B into the polluted soil or underground water so as to implement said degradation method; the adding mode of the substance A and the substance B is as follows: simultaneously, adding the substance A and then adding the substance B or adding the substance B and then adding the substance A.
A degradation method of refractory organics in soil and underground water is to add a substance B and a substance C into polluted soil or underground water to complete the degradation method; the adding modes of the substance B and the substance C are as follows: simultaneously, adding the substance B and then the substance C or adding the substance C and then the substance B.
The existing chemical oxidation methods such as persulfate, calcium peroxide, potassium permanganate and the like have low removal rate on petroleum hydrocarbon, polycyclic aromatic hydrocarbon and benzene series in soil, and have large consumption of oxidant and high treatment cost; the present invention solves the above problems.
In the invention, one or more of ammonium nitrogen, nitrate nitrogen, urea, nitrogen fertilizer, ammonia nitrogen, polyhydroxyalkanoate, chemical fertilizer, organic fertilizer, compost tea, slow release fertilizer, controlled release fertilizer and nitrogen-containing compound are added in the process of repairing soil by using oxidant (namely one of the substances A), so that the dosage of the oxidant can be greatly reduced, the degradation rate of pollutants of refractory organic matters is improved, the adsorption effect of the refractory organic matters on the surface of the soil is reduced, the removal rate of petroleum hydrocarbon, polycyclic aromatic hydrocarbon, benzene series and halogenated hydrocarbon in the soil can be obviously improved, the decomposition reaction of the pollutants is mild and long-acting, the soil repairing cost is reduced, and the acidification and damage of oxidants such as persulfate and the like to the ecological conditions of the soil are weakened. The method adopts three oxidants of activated persulfate, calcium peroxide and potassium permanganate to respectively carry out oxidation treatment on the polluted soil with petroleum hydrocarbon concentration of 40000mg/kg and 15000mg/kg, and the total petroleum hydrocarbon removal rate of the polluted soil is lower than 35 percent and 45 percent.
The method adopts low-price iron salt and iron ore which are sold in the market, and does not need the procedures of doping, loading and the like and the preparation of the nano carbon material, so that the treatment cost of soil and underground water can be greatly reduced. The effective substances can be injected into deep polluted soil and underground water through drilling, and the deep polluted soil and the underground water can be efficiently restored.
The invention is suitable for degrading refractory organic matters in soil and underground water.
Detailed Description
The technical solution of the present invention is not limited to the following specific embodiments, but includes any combination of the specific embodiments.
The first embodiment is as follows: the degradation method of the refractory organic matters in the soil and the underground water is implemented by adding a substance A and a substance B into the polluted soil or the underground water; the adding mode of the substance A and the substance B is as follows: simultaneously adding, firstly adding the substance A and then adding the substance B or firstly adding the substance B and then adding the substance A.
The time interval between the addition of species A and species B in this embodiment may be long or short.
The contaminated soil or groundwater in the present embodiment refers to surface-layer contaminated soil, deep-layer contaminated soil or groundwater contaminated with benzene compounds, polycyclic aromatic hydrocarbons, petroleum hydrocarbons, and halogenated hydrocarbons.
The second embodiment is as follows: different from the specific embodiment, the substance a is one or a combination of more of persulfate, calcium peroxide, potassium permanganate, ferrous or ferrous salt, ferric or ferric ion, ferric oxide, ferroferric oxide, ferrous sulfide, pyrite, magnetite, hematite, maghemite, limonite, and siderite. Other steps and parameters are the same as those in the first embodiment.
When the substance A is a composition in the present embodiment, the respective components are mixed at an arbitrary ratio.
The third concrete implementation mode: this embodiment differs from the first embodiment in that the substance B is a nitrogen-containing compound or a nitrogen-containing mixture. Other steps and parameters are the same as those in the first embodiment. Other steps and parameters are the same as those in the first embodiment.
The fourth concrete implementation mode: different from the specific embodiment, the substance B is one or a combination of ammonium nitrogen, nitrate nitrogen, urea, a nitrogen fertilizer, ammonia nitrogen, polyhydroxyalkanoate, a chemical fertilizer, an organic fertilizer, compost tea, a slow release fertilizer and a controlled release fertilizer. Other steps and parameters are the same as those in the first embodiment.
When the substance B is a composition in the present embodiment, the respective components are mixed at an arbitrary ratio.
The fifth concrete implementation mode: the present embodiment is different from the first embodiment in that the mass ratio of the substance A to the target pollutant in the contaminated soil or groundwater is (0.05-50): 1. Other steps and parameters are the same as those in the first embodiment.
The sixth specific implementation mode: the difference between the present embodiment and the first embodiment is that the mass ratio of the substance B to the target pollutant in the contaminated soil or groundwater is (0.05-50): 1. Other steps and parameters are the same as those in the first embodiment.
The seventh concrete implementation mode: different from the first embodiment, the substance a and the substance B may be used as they are, or may be used after being mixed with water. Other steps and parameters are the same as those in the first embodiment.
In the present embodiment, the concentration of the solution obtained by mixing the substance a and the substance B with water is not limited.
In this embodiment, the substance a and the substance B may be directly added to the contaminated soil or groundwater, or may be injected into the deep contaminated soil or groundwater.
The specific implementation mode is eight: the degradation method of the refractory organic matters in the soil and the underground water is implemented by adding a substance B and a substance C into the polluted soil or the underground water; the adding modes of the substance B and the substance C are as follows: simultaneously, adding the substance B and then the substance C or adding the substance C and then the substance B.
The time interval between the addition of species B and substance C in this embodiment may be long or short.
The contaminated soil or groundwater in the present embodiment refers to surface-layer contaminated soil, deep-layer contaminated soil or groundwater contaminated with benzene compounds, polycyclic aromatic hydrocarbons, petroleum hydrocarbons, and halogenated hydrocarbons.
In this embodiment, the substance B is a nitrogen-containing compound or a nitrogen-containing mixture; the substance B is one or a composition of more of ammonium nitrogen, nitrate nitrogen, urea, nitrogen fertilizer, ammonia nitrogen, polyhydroxyalkanoate, chemical fertilizer, organic fertilizer, compost tea, slow release fertilizer and controlled release fertilizer; when the substance B is a composition, all the components are mixed according to any ratio; the mass ratio of the substance B to the target pollutant in the polluted soil or the underground water is (0.05-50): 1.
In the present embodiment, the substance B and the substance C may be used as they are, or may be used after being mixed with water. Other steps and parameters are the same as those in the first embodiment.
In the present embodiment, the concentration of the solution obtained by mixing the substance B and the substance C with water is not limited.
In this embodiment, the substance B and the substance C may be directly added to the contaminated soil or groundwater, or may be injected into the deep contaminated soil or groundwater.
The specific implementation method nine: the difference between this embodiment and the eighth embodiment is that the substance C is one or a combination of several of persulfate, calcium peroxide, potassium permanganate, ferrous salt, and ferric salt. Other steps and parameters are the same as those in the eighth embodiment.
When the solution C is a composition in this embodiment, the components are mixed at an arbitrary ratio.
The detailed implementation mode is ten: the present embodiment is different from the eighth embodiment in that the mass ratio of the substance C to the target pollutant in the contaminated soil or groundwater is (0.05 to 50): 1. The other steps and parameters are the same as those in the eighth embodiment.
The beneficial effects of the present invention are demonstrated by the following examples:
example 1:
the degradation method of the refractory organics in the soil and the underground water is realized according to the following steps:
1. when the object to be treated is surface layer contaminated soil, adding the substance A into the surface layer contaminated soil, adding the substance B after 15 days, and finishing the degradation of the refractory organic matters in the surface layer contaminated soil after 40 days;
2. and when the to-be-treated object is deep polluted soil and underground water, drilling to the depth of the deep polluted soil or underground water, then injecting the water solution of the substance C into the deep polluted soil and underground water by using a pump for 15 days, then adding the water solution of the substance B by using the pump, and finishing the degradation of the refractory organic matters in the soil and underground water after 40 days.
In the present embodiment, the surface-contaminated soil, the deep-contaminated soil, or the ground water is contaminated with petroleum hydrocarbons.
In the first step of this embodiment, the surface contaminated soil is 0 to 20cm from the ground surface.
In the first step of this embodiment, the substance a is a mixture of sodium persulfate and ferrous sulfate, and the mass ratio is 4.
In the first step of this embodiment, the mass ratio of the substance a to the target pollutant in the surface layer contaminated soil is 7.5.
In the first step of this example, the substance B is urea.
In the first step of this embodiment, the mass ratio of the substance B to the target pollutant in the surface layer contaminated soil is 4.
In the second step of this embodiment, the deep contaminated soil is 2500 to 3000cm away from the earth's surface.
Aqueous solution of substance C in step two of this example: sodium persulfate with the concentration of 20wt% and ferrous sulfate with the concentration of 20wt% are mixed according to the mass ratio of 4.
The mass ratio of the substance C to the target pollutant in the deep polluted soil in the second step of the embodiment is 20.
The substance B in step two of this example, which had a concentration of 30wt%, was an aqueous solution of urea.
Comparative example 1-1:
this comparative example differs from example 1 in that: in step 1, no further substance B was added. The other steps and parameters were the same as in the first step of example 1.
Comparative examples 1 to 2:
this comparative example differs from comparative examples 1-1 in that: the adding amount of the substance A in the step 1 is 0.05-0.0625. The other steps and parameters were the same as in step one of example 1.
In the first step of this example, the surface contaminated soil of the object to be treated originates from Daqing city of Heilongjiang province, and is contaminated by petroleum hydrocarbon, the concentration of petroleum hydrocarbon in the soil is 5163 ± 113mg/kg, and the numerical value ratio of the initial state to each item after treatment in this example is shown in Table 1. The persulfate advanced oxidation method is independently used for treating the petroleum hydrocarbon polluted soil, the removal rate of the petroleum hydrocarbon reaches 40-44% within 15 days, the concentration of the residual petroleum hydrocarbon in the soil is 2117mg/kg, but the reaction time is continuously prolonged, and the removal effect of the petroleum hydrocarbon is not obvious any more. When the addition ratio of the substance A is increased from 3.75% to 6.25%, the final removal rate of petroleum hydrocarbon still does not exceed 45%. As shown in the example 1, the urea is continuously added into the chemically oxidized soil, the petroleum hydrocarbon degradation rates of the soil in 40 days of the coupling reaction reach 77.3%, and the concentration of the treated petroleum hydrocarbon is 1172mg/kg.
TABLE 1
| The amount of substance A | Initial concentration | Removal rate of 15 days | Removal rate of 55 days | Concentration after treatment | |
| mg/kg | ％ | ％ | mg/kg | ||
| Example 1 | 7.5:1 | 5164 | 43.3 | 77.3 | 1172 |
| Comparative examples 1 to 1 | 7.5:1 | 5177 | 42.8 | 41.6 | 2988 |
| Comparative examples 1 to 2 | 10:1 | 5151 | 44.4 | 45.5 | 2807 |
| Comparative examples 1 to 2 | 12.5:1 | 5143 | 40.6 | 42.7 | 2947 |
Comparative examples 1 to 3:
this comparative example differs from example 1 in that: in step 2, no further substance B was added. The other steps and parameters were the same as in the first step of example 1.
Comparative examples 1 to 4:
this comparative example differs from comparative examples 1 to 3 in that: the adding amount of the solution C in the step 1 is 24-32. The other steps and parameters were the same as in step one of example 1.
The deep contaminated soil and groundwater of the to-be-treated object in the second step of this example are from Daqing city of Heilongjiang province, and are contaminated by petroleum hydrocarbon, the concentration of petroleum hydrocarbon in the soil is 1343 + -52 mg/kg, and the numerical value ratio of the initial state and the treated items in this example is shown in Table 2. The persulfate advanced oxidation method is independently used for treating the deep petroleum hydrocarbon polluted soil, the removal rate of the petroleum hydrocarbon reaches 53-55% within 15 days, the concentration of the residual petroleum hydrocarbon in the soil is 712mg/kg, but the reaction time is continuously prolonged, and the removal effect of the petroleum hydrocarbon is not obvious any more. When the addition ratio of the substance C is increased from 3.75% to 6.25%, the final removal rate of petroleum hydrocarbon still does not exceed 55%. As shown in the example 1, the urea is continuously added into the chemically oxidized soil, the petroleum hydrocarbon degradation rates of the soil in 40 days of coupling reaction reach 85.8%, and the concentration of the petroleum hydrocarbon after treatment is 191mg/kg.
TABLE 2
| The amount of substance A | Initial concentration | Removal rate of 15 days | Removal rate of 55 days | Concentration after treatment | |
| mg/kg | ％ | ％ | mg/kg | ||
| Example 1 | 20:1 | 1343 | 51.5 | 85.8 | 191 |
| Comparative examples 1 to 3 | 20:1 | 1362 | 50.8 | 51.3 | 2988 |
| Comparative examples 1 to 4 | 24:1 | 1355 | 54.6 | 52.6 | 2807 |
| Comparative examples 1 to 4 | 32:1 | 1359 | 53.8 | 54.8 | 2947 |
Example 2:
the degradation method of the refractory organic matters in the soil and the underground water can be realized by the following steps:
1. when the object to be treated is surface layer contaminated soil, adding the substance B into the surface layer contaminated soil, adding the substance A after 50 days, and finishing the degradation of the refractory organic matters in the surface layer contaminated soil after 15 days;
2. and when the to-be-treated object is deep polluted soil and underground water, drilling to the depth of the deep polluted soil or underground water, then injecting the water solution of the substance B into the deep polluted soil and underground water by using a pump, after 50 days, adding the water solution of the substance C by using the pump, and after 15 days, finishing the degradation of the organic matters which are difficult to degrade in the soil and underground water.
In the present embodiment, the surface-contaminated soil, the deep-contaminated soil, or the ground water is contaminated with petroleum hydrocarbons.
In the first step of this embodiment, the surface contaminated soil is 0 to 20cm away from the ground surface.
In the first step of this embodiment, the substance a is a mixture of sodium persulfate and ferrous sulfate, and the mass ratio is 4.
In the first step of this embodiment, the mass ratio of the substance a to the target pollutant in the surface layer contaminated soil is 4.
In the first step of this example, the substance B is urea.
In the first step of this embodiment, the mass ratio of the substance B to the target pollutant in the surface layer contaminated soil is 4.
In the second step of this embodiment, the deep contaminated soil is 2500 to 3000cm away from the earth's surface.
Aqueous solution of substance C in step two of this example: sodium persulfate with the concentration of 20wt% and ferrous sulfate with the concentration of 20wt% are mixed according to the mass ratio of 4.
The mass ratio of the substance C to the target pollutant in the deep polluted soil in the second step of the embodiment is 20.
The substance B in step two of this example, which had a concentration of 30wt%, was an aqueous solution of urea.
Comparative example 2-1:
this comparative example differs from example 2 in that: in step 1, no more substance A was added. The other steps and parameters were the same as in step one of example 1.
Comparative examples 2 to 2:
this comparative example is different from comparative example 2-1 in that: the adding amount of the substance B in the step 1 is 6-10. The other steps and parameters were the same as in the first step of example 1.
The soil contaminated by the surface layer of the object to be treated in the first step of this example is from Daqing city of Heilongjiang province, and is contaminated by petroleum hydrocarbon, the concentration of the petroleum hydrocarbon in the soil is 5163 ± 113mg/kg, and the numerical value ratio of the initial state and the numerical values after treatment in this example is shown in Table 3. 2 percent, 3 percent and 5 percent of urea is added into the polluted soil, the degradation rate of petroleum hydrocarbon reaches 45.38 percent, 46.15 percent and 40.76 percent within 50 days, and the petroleum hydrocarbon is slowly degraded. After the addition of substance A, the concentration of petroleum hydrocarbon was reduced to 1355mg/kg after 15 days, and the removal rate reached 73.69%, which not only greatly improved the removal effect of pollutants, but also reduced the input of oxidant, as in the method of example 2.
TABLE 3
| The amount of substance A | Initial concentration | 50 days removal rate | 65 days of removal rate | Concentration after treatment | |
| mg/kg | ％ | ％ | mg/kg | ||
| Example 2 | 4:1 | 5152 | 45.38 | 73.69 | 1355 |
| Comparative example 2-1 | 4:1 | 5138 | 45.69 | 48.36 | 2653 |
| Comparative examples 2 to 2 | 6:1 | 5116 | 46.15 | 49.13 | 2754 |
| Comparative examples 2 to 2 | 10:1 | 5192 | 40.76 | 42.35 | 3075 |
Comparative examples 2 to 3:
this comparative example differs from example 2 in that: in step two, substance A is not added any more. The other steps and parameters were the same as those in the second step of example 2.
Comparative examples 2 to 4:
this comparative example differs from comparative example 2-1 in that: in the second step, the addition amount of the substance B is 6-10. The other steps and parameters were the same as those in the second step of example 2.
The soil contaminated by the surface layer of the object to be treated in the first step of this example is from Daqing city of Heilongjiang province, and is contaminated by petroleum hydrocarbon, the concentration of petroleum hydrocarbon in the soil is 1343 + -52 mg/kg, and the numerical value ratio of the initial state and the numerical values after treatment in this example is shown in Table 4. 2 percent, 3 percent and 5 percent of urea is added into the polluted soil, the degradation rate of petroleum hydrocarbon reaches 45.80 percent, 47.69 percent and 44.13 percent within 50 days, and the petroleum hydrocarbon is slowly degraded. In contrast, the method of example 2, in which the concentration of the petroleum hydrocarbon was reduced to 271mg/kg after 15 days, the removal rate reached 79.32%, with the addition of the substance A.
TABLE 4
| The amount of substance A | Initial concentration | 50 days removal rate | 65 days of removal rate | Concentration after treatment | |
| mg/kg | ％ | ％ | mg/kg | ||
| Example 2 | 4:1 | 1314 | 45.80 | 79.32 | 271 |
| Comparative examples 2 to 3 | 4:1 | 1325 | 46.15 | 48.26 | 810 |
| Comparative examples 2 to 4 | 6:1 | 1355 | 47.69 | 49.36 | 708 |
| Comparative examples 2 to 4 | 10:1 | 1311 | 44.13 | 48.23 | 678 |
Claims (10)
1. A method for degrading refractory organics in soil and underground water is characterized in that a substance A and a substance B are added into polluted soil or underground water to complete the degradation method; the adding mode of the substance A and the substance B is as follows: simultaneously adding, firstly adding the substance A and then adding the substance B or firstly adding the substance B and then adding the substance A.
2. The method according to claim 1, wherein the material A is one or a combination of persulfate, calcium peroxide, potassium permanganate, ferrous or ferrous iron salt, ferric or ferric iron salt, ferric oxide, ferroferric oxide, ferrous sulfide, pyrite, magnetite, hematite, maghemite, limonite, and siderite.
3. The method according to claim 1, wherein the substance B is a nitrogen-containing compound or a mixture thereof.
4. The method according to claim 1, wherein the substance B is one or more selected from ammonium nitrogen, nitrate nitrogen, urea, nitrogen fertilizer, ammoniacal nitrogen, polyhydroxyalkanoate, fertilizer, organic fertilizer, compost tea, slow release fertilizer, and controlled release fertilizer.
5. The method according to claim 1, wherein the mass ratio of the substance A to the target pollutant in the contaminated soil or groundwater is (0.05-50): 1.
6. The method according to claim 1, wherein the mass ratio of the substance B to the target pollutant in the contaminated soil or groundwater is (0.05-50): 1.
7. The method according to claim 1, wherein the substance A and the substance B can be used as they are or mixed with water.
8. A degradation method of refractory organics in soil and underground water is characterized in that a substance B and a substance C are added into polluted soil or underground water to complete the degradation method; the adding modes of the substance B and the substance C are as follows: simultaneously, adding the substance B and then the substance C or adding the substance C and then the substance B.
9. The method according to claim 8, wherein the substance C is one or more selected from the group consisting of persulfates, calcium peroxide, potassium permanganate, ferrous salts, and ferric salts.
10. The method according to claim 8, wherein the mass ratio of the substance C to the target pollutant in the contaminated soil or groundwater is (0.05-50): 1.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011245458A (en) * | 2010-05-31 | 2011-12-08 | Adeka Corp | Method for decomposition of organic substance, and decomposition agent kit for organic substance |
| CN107008745A (en) * | 2017-04-25 | 2017-08-04 | 南京农业大学 | A kind of petroleum hydrocarbon contaminated soil repairs medicament and application method |
| CN108405595A (en) * | 2018-03-02 | 2018-08-17 | 南京农业大学 | A kind of organic contamination agricultural land soil fertilizing-growth-promoting-attenuation treatment and detection method |
| CN110551505A (en) * | 2019-08-02 | 2019-12-10 | 湖南恒凯环保科技投资有限公司 | Combined reagent and method for repairing pentachlorophenol polluted soil |
| CN111136094A (en) * | 2018-11-02 | 2020-05-12 | 中国石油化工股份有限公司 | Method for restoring polluted soil and underground water |
-
2022
- 2022-09-08 CN CN202211100404.9A patent/CN115625193A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011245458A (en) * | 2010-05-31 | 2011-12-08 | Adeka Corp | Method for decomposition of organic substance, and decomposition agent kit for organic substance |
| CN107008745A (en) * | 2017-04-25 | 2017-08-04 | 南京农业大学 | A kind of petroleum hydrocarbon contaminated soil repairs medicament and application method |
| CN108405595A (en) * | 2018-03-02 | 2018-08-17 | 南京农业大学 | A kind of organic contamination agricultural land soil fertilizing-growth-promoting-attenuation treatment and detection method |
| CN111136094A (en) * | 2018-11-02 | 2020-05-12 | 中国石油化工股份有限公司 | Method for restoring polluted soil and underground water |
| CN110551505A (en) * | 2019-08-02 | 2019-12-10 | 湖南恒凯环保科技投资有限公司 | Combined reagent and method for repairing pentachlorophenol polluted soil |
Non-Patent Citations (1)
| Title |
|---|
| 王鸿显;邱自力;胡兰萍;姜国民;曹文;: "施过碳酰胺对土壤中有机污染物的降解作用" * |
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