CN114433616A - Method for treating soil organic degradation-resistant pollutants - Google Patents
Method for treating soil organic degradation-resistant pollutants Download PDFInfo
- Publication number
- CN114433616A CN114433616A CN202111496310.3A CN202111496310A CN114433616A CN 114433616 A CN114433616 A CN 114433616A CN 202111496310 A CN202111496310 A CN 202111496310A CN 114433616 A CN114433616 A CN 114433616A
- Authority
- CN
- China
- Prior art keywords
- soil
- pollutants
- sodium persulfate
- degradation
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 155
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 35
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 29
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 29
- 230000015556 catabolic process Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- 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 abstract description 53
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 239000007864 aqueous solution Substances 0.000 claims abstract description 22
- 239000004094 surface-active agent Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 238000007873 sieving Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 18
- -1 polyoxyethylene lauryl ether Polymers 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 claims description 11
- 235000012255 calcium oxide Nutrition 0.000 claims description 9
- 239000000292 calcium oxide Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 4
- 239000000244 polyoxyethylene sorbitan monooleate Substances 0.000 claims description 4
- 229920000053 polysorbate 80 Polymers 0.000 claims description 4
- 229940068968 polysorbate 80 Drugs 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 9
- 230000000593 degrading effect Effects 0.000 abstract description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 16
- 238000001514 detection method Methods 0.000 description 10
- 150000003254 radicals Chemical class 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 239000003993 organochlorine pesticide Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000009210 therapy by ultrasound Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 238000001994 activation Methods 0.000 description 4
- JLYXXMFPNIAWKQ-GNIYUCBRSA-N gamma-hexachlorocyclohexane Chemical compound Cl[C@H]1[C@H](Cl)[C@@H](Cl)[C@@H](Cl)[C@H](Cl)[C@H]1Cl JLYXXMFPNIAWKQ-GNIYUCBRSA-N 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 229960002809 lindane Drugs 0.000 description 4
- 239000000575 pesticide Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000006298 dechlorination reaction Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000007928 solubilization Effects 0.000 description 3
- 238000005063 solubilization Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
-
- 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
Abstract
The invention discloses a method for treating soil organic degradation-resistant pollutants, which comprises the following steps: step S10, crushing and sieving the soil, adding a surfactant, and uniformly mixing; step S20, heating the soil treated in the step S10 to 60-80 ℃, and spraying a sodium persulfate aqueous solution to the soil for degradation reaction; wherein the heating mode is microwave heating or steam heating. The invention aims to provide a method for effectively degrading organic pollutants which are difficult to degrade in soil, and the soil is repaired.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a method for treating soil organic degradation-resistant pollutants.
Background
Soil is an important component of the ecological environment and is one of the main resources on which human beings live. The organic chlorine pesticide is one of common pesticides, has strong toxicity, is difficult to naturally degrade, and causes great pollution to soil.
Disclosure of Invention
The invention mainly aims to provide a method for treating soil organic degradation-resistant pollutants, and aims to provide a method capable of effectively degrading the organic degradation-resistant pollutants in soil and restoring the soil.
In order to achieve the purpose, the invention provides a method for treating soil organic degradation-resistant pollutants, which comprises the following steps:
step S10, crushing and sieving the soil, adding a surfactant, and uniformly mixing;
step S20, heating the soil treated in the step S10 to 60-80 ℃, and spraying a sodium persulfate aqueous solution to the soil for degradation reaction;
wherein the heating mode is microwave heating or steam heating.
Optionally, in step S10, the concentration of the aqueous solution of sodium persulfate is 0.6-1.5 mol/L, and the addition amount of the aqueous solution of sodium persulfate is 1.5-3L per Kg of soil.
Optionally, in step S10, the surfactant includes polyoxyethylene lauryl ether or polysorbate-80; and/or the presence of a gas in the gas,
the addition amount of the surfactant is 0.8-1.2% of the weight of the soil.
Optionally, in step S10, the particle size of the sieved soil is not greater than 10 mm.
Optionally, in step S10, after the surfactant is added, the mixing time is 3-6 hours.
Alternatively, in step S20, the heating process is performed in a nitrogen stream.
Alternatively, in step S20, after spraying the aqueous solution of sodium persulfate to the soil, the soil is subjected to ultrasonic treatment.
Optionally, the ultrasonic frequency is 30kHz to 100kHz, the ultrasonic power is 50W to 300W, and the ultrasonic irradiation time is 3h to 4.5 h.
Optionally, the method further comprises:
and step S30, adding quicklime into the soil after the degradation reaction in the step S20 is finished, and uniformly stirring.
Optionally, the addition amount of the quicklime is 5% -10% of the soil.
According to the technical scheme, by heating the soil, sodium persulfate can be quickly activated to generate sulfate radicals and reductive radicals when meeting the high-temperature soil, the sulfate radicals are stable and have high redox potential, organic pollutants in the soil can be effectively degraded, and the reductive radicals have efficient dechlorination and degradation effects on organochlorine pesticides and are beneficial to reducing the content of the organochlorine pesticides in the soil; by selecting the modes of steam heating and microwave heating, the soil can be rapidly and uniformly heated, the situations that the surface temperature is too high and the internal temperature is still low can be avoided, and the sodium persulfate can be uniformly distributed in the soil by matching with the dosing modes of soil pulverization and spraying, so that the optimal temperature and the sodium persulfate concentration of the soil can be uniformly reached everywhere under the synergistic effect of the three modes, the degradation efficiency is improved, and the sodium persulfate dosage is saved; in addition, through before spraying sodium persulfate, add surfactant active earlier to make it and soil misce bene, thereby through the solubilization, increased hydrophobic nature organic pollutant's water-solubility, and then realized the promotion to degradation efficiency.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Soil is an important component of the ecological environment and is one of the main resources on which human beings live. The organic chlorine pesticide is one of common pesticides, has strong toxicity, is difficult to naturally degrade, and causes great pollution to soil.
In view of the above, the present invention provides a method for treating soil organic degradation-resistant pollutants, comprising the following steps:
and step S10, crushing and sieving the soil, adding the surfactant, and uniformly mixing.
In this example, soil was first pulverized to reduce the particle size thereof, so that the surfactant and sodium persulfate could uniformly contact the soil. The time and parameters of the crushing treatment and the mesh number of the sieving are based on the size of the soil particle size after crushing, and specifically, in the embodiment, the particle size of the soil after sieving is not more than 10 mm.
In addition, the combination of the surfactant and sodium persulfate is found to be helpful for improving the degradation efficiency. Specifically, in this embodiment, the surfactant includes polyoxyethylene lauryl ether or polysorbate-80; the addition amount of the surfactant is 0.8-1.2% of the weight of the soil; and after the surfactant is added, mixing for 3-6 h. In the embodiment, the surfactant is added before the sodium persulfate is sprayed, and is uniformly mixed with the soil, so that the water solubility of the hydrophobic organic pollutant can be increased by utilizing the solubilization effect, the contact between the hydrophobic organic pollutant and the sodium persulfate is increased, and the degradation efficiency is improved; meanwhile, in the present embodiment, a plurality of surfactants on the market are screened, and compared with other surfactants (such as sodium dodecyl benzene sulfonate and sodium dodecyl sulfate), the polyoxyethylene lauryl ether and polysorbate-80 have better effect on improving the degradation efficiency.
In addition, this embodiment chooses sodium persulfate as the oxidant, and compared with potassium persulfate and ammonium persulfate, sodium persulfate not only is easier to activate and produces sulfate radical and reducing radical, and the stability is better moreover.
When soil is repaired, the addition of sodium persulfate directly influences its degradation efficiency, specifically, in this embodiment, the concentration of sodium persulfate aqueous solution is 0.6 ~ 1.5mol/L, and in every Kg soil, the addition of sodium persulfate aqueous solution is 1.5 ~ 3L, when the addition of sodium persulfate is injectd at above-mentioned within range, can promote degradation efficiency to the biggest, simultaneously, can avoid leading to a large amount of free radicals that produce in the twinkling of an eye because of initial concentration is too high quenching each other, and then cause the sodium persulfate extravagant.
Step S20, heating the soil treated in the step S10 to 60-80 ℃, and spraying sodium persulfate aqueous solution to the soil for degradation reaction; wherein the heating mode is microwave heating or steam heating.
In the embodiment, the soil is heated by adopting a microwave heating or steam heating mode, after the temperature is raised to 60-80 ℃, the sodium persulfate aqueous solution is added in a spraying mode, the heating mode is optimized to uniformly and rapidly raise the temperature inside and outside the soil, the situations that the surface temperature is too high and the internal temperature is low can be avoided, so that when the sodium persulfate is contacted with the soil, on one hand, under the action of thermal activation, the sodium persulfate uniformly distributed at each position of the soil can be rapidly activated to generate free radicals which are uniformly distributed, so that the sodium persulfate can be sufficiently contacted with organic pollutants which are difficult to degrade, the degradation efficiency and the utilization rate of the sodium persulfate are improved, on the other hand, the heating mode can avoid that the local temperature is too high or too low, so that the activation efficiency of the sodium persulfate is not activated or is too low due to too low temperature is avoided, too high can lead to persulfate quenching), and then improve sodium persulfate utilization ratio, avoid extravagant.
In addition, in some embodiments, when step S20 is performed, the heating process is performed in a nitrogen gas flow, that is, step S20 is specifically performed as follows: the soil treated in step S10 was heated to 60 to 80 ℃ in a nitrogen stream, and then an aqueous solution of sodium persulfate was sprayed onto the soil. Under the heating environment, partial organochlorine pesticide can break away from soil, volatilize, and this embodiment will heat the step and place in the nitrogen gas flow and go on, can take away the organochlorine pesticide that volatilizees with the help of the air current on the one hand, reduces the content of organochlorine pesticide in the soil, and on the other hand, the anaerobic environment has been built to the nitrogen gas flow, and the dechlorination degradation effect of the reducing free radical that the sodium persulfate activation generated is better to the organochlorine pollutant under the anaerobic environment.
Further, in some embodiments, in step S20, after spraying the aqueous solution of sodium persulfate to the soil, the soil is subjected to ultrasonic treatment. Specifically, step S20 is implemented as follows: and (4) heating the soil treated in the step S10 to 60-80 ℃, spraying a sodium persulfate aqueous solution to the soil, and then carrying out ultrasonic radiation on the soil. By combining ultrasonic, the generation rate of free radicals is further improved, the activation effect is further improved, and the degradation rate is improved; in addition, ultrasonic treatment is also helpful for the separation of organic pollutants which are difficult to degrade, and the degradation rate is further improved. Specifically, the ultrasonic frequency is 30 kHz-100 kHz, the ultrasonic power is 50W-300W, and the ultrasonic irradiation time is 3-4.5 h.
In addition, in the specific implementation, after step S20, the method further includes:
and step S30, adding quicklime into the soil after the degradation reaction in the step S20 is finished, and uniformly stirring.
Quick lime can activate sodium persulfate on the one hand, makes the activation of remaining unactivated sodium persulfate, improves its utilization ratio, and on the other hand can decompose the sulfate ion production with sodium persulfate and generate calcium sulfate indissolvable in water, has avoided the sulfate to cause secondary pollution.
Specifically, the addition amount of the quicklime is 5% -10% of the soil.
According to the technical scheme, by heating the soil, sodium persulfate can be quickly activated to generate sulfate radicals and reductive radicals when meeting the high-temperature soil, the sulfate radicals are stable and have high redox potential, organic pollutants in the soil can be effectively degraded, and the reductive radicals have efficient dechlorination and degradation effects on organochlorine pesticides and are beneficial to reducing the content of the organochlorine pesticides in the soil; by selecting the modes of steam heating and microwave heating, the soil can be rapidly and uniformly heated, the situations that the surface temperature is too high and the internal temperature is still low can be avoided, and the sodium persulfate can be uniformly distributed in the soil by matching with the dosing modes of soil pulverization and spraying, so that the optimal temperature and the sodium persulfate concentration of the soil can be uniformly reached everywhere under the synergistic effect of the three modes, the degradation efficiency is improved, and the sodium persulfate dosage is saved; in addition, through before spraying sodium persulfate, add surfactant active earlier to make it and soil misce bene, thereby through the solubilization, increased hydrophobic nature organic pollutant's water-solubility, and then realized the promotion to degradation efficiency.
The technical solutions of the present invention are further described in detail with reference to the following specific examples, which should be understood as merely illustrative and not limitative.
Example 1
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 100g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 4.5 hours.
After the soil was heated by microwave to 70 ℃ and 2L of a 1.0mol/L aqueous solution of sodium persulfate was sprayed onto the soil, the soil was reacted for 1 day to obtain treated soil.
Through detection, the removal rate of total pollutants in the soil reaches 98.6%, the removal rate of phenanthrene reaches 82.4%, and the removal rate of sixty-six reaches 89.9%.
Example 2
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 80g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 3 hours.
After the soil was heated by microwave to 60 ℃ and then 3L of a 0.6mol/L aqueous sodium persulfate solution was sprayed to the soil, the soil was treated after 1 day of reaction.
Through detection, the removal rate of total pollutants in the soil reaches 98%, the removal rate of phenanthrene reaches 82.6%, and the removal rate of sixty-six reaches 89.1%.
Example 3
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. Polysorbate-80120 g is added to 10Kg of soil, and mixed for 6 hours with stirring.
After the soil was heated by microwave to 80 ℃ and 1.5L of a 1.5mol/L aqueous solution of sodium persulfate was sprayed onto the soil, the soil was treated after 1 day of reaction.
Through detection, the removal rate of total pollutants in the soil reaches 98%, the removal rate of phenanthrene reaches 80%, and the removal rate of sixty-six reaches 88%.
Example 4
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 100g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 4.5 hours.
After the soil was heated with steam to 70 ℃ and 2L of a 1mol/L aqueous solution of sodium persulfate was sprayed onto the soil, the soil was reacted for 1 day to obtain treated soil.
Through detection, the removal rate of total pollutants in the soil reaches 97.9%, the removal rate of phenanthrene reaches 81.9%, and the removal rate of hexachloro cyclohexane reaches 89.2%.
Example 5
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 100g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 4.5 hours.
The soil was heated by microwave in a nitrogen stream to 70 ℃ and then 2L of a 1.0mol/L aqueous sodium persulfate solution was sprayed onto the soil to react for 1 day, thereby obtaining treated soil.
Through detection, the removal rate of total pollutants in the soil reaches 98.9%, the removal rate of phenanthrene reaches 83.1%, and the removal rate of hexachloro cyclohexane reaches 91.0%.
Example 6
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 100g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 4.5 hours.
And (2) carrying out microwave heating on the soil to raise the temperature to 70 ℃, spraying 2L of 1mol/L sodium persulfate aqueous solution to the soil, and then carrying out ultrasonic treatment on the soil, wherein the ultrasonic frequency is 40kHz, the ultrasonic power is 200W, and the treated soil is obtained after ultrasonic irradiation is carried out for 4.5 hours.
Through detection, the removal rate of total pollutants in the soil reaches 99.2%, the removal rate of phenanthrene reaches 83.0%, and the removal rate of sixty-six reaches 93%.
Example 7
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 100g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 4.5 hours.
And (2) heating the soil by microwave to raise the temperature to 70 ℃, spraying 2L of 1.0mol/L sodium persulfate aqueous solution to the soil, reacting for 1 day, adding 800g of quicklime, stirring uniformly, and standing for 3h to obtain the treated soil.
Through detection, the removal rate of total pollutants in the soil reaches 98.9%, the removal rate of phenanthrene reaches 82.2%, and the removal rate of hexachloro cyclohexane reaches 90%.
Example 8
And (3) crushing the soil, and then sieving to obtain the soil with the particle size of not more than 10mm for later use. 100g of polyoxyethylene lauryl ether was added to 10Kg of soil, and the mixture was stirred and mixed for 4.5 hours.
Heating soil by microwave in nitrogen flow to raise the temperature to 70 ℃, spraying 2L of 1.0mol/L sodium persulfate aqueous solution to the soil, then carrying out ultrasonic treatment on the soil, wherein the ultrasonic frequency is 40kHz, the ultrasonic power is 200W, after ultrasonic irradiation is carried out for 4.5h, adding 800g of quicklime, stirring uniformly, and standing for 3h to obtain the treated soil.
Through detection, the removal rate of total pollutants in the soil reaches 99.6%, the removal rate of phenanthrene reaches 87.0%, and the removal rate of hexachloro cyclohexane reaches 95.3%.
Comparative example 1
The procedure was as in example 1 except that the surfactant was changed to sodium lauryl sulfate. Through detection, the removal rate of total pollutants in the soil reaches 96.7%.
Comparative example 2
The procedure was the same as in example 1 except that the heating method was changed to oven heating. Through detection, the removal rate of total pollutants in the soil reaches 94.9%.
The above is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the scope of the present invention.
Claims (10)
1. A method for treating soil organic degradation-resistant pollutants is characterized by comprising the following steps:
step S10, crushing and sieving the soil, adding a surfactant, and uniformly mixing;
step S20, heating the soil treated in the step S10 to 60-80 ℃, and spraying a sodium persulfate aqueous solution to the soil for degradation reaction;
wherein the heating mode is microwave heating or steam heating.
2. The method for treating soil organic degradation-resistant pollutants as claimed in claim 1, wherein in step S10, the concentration of said aqueous solution of sodium persulfate is 0.6-1.5 mol/L, and the addition amount of said aqueous solution of sodium persulfate is 1.5-3L per Kg of soil.
3. The method for treating soil organic refractory pollutants as claimed in claim 1, wherein in step S10, the surfactant comprises polyoxyethylene lauryl ether or polysorbate-80; and/or the presence of a gas in the gas,
the addition amount of the surfactant is 0.8-1.2% of the weight of the soil.
4. The method for treating soil organic degradation-resistant pollutants as claimed in claim 1, wherein in step S10, the particle size of the soil after sieving is not more than 10 mm.
5. The method for treating soil organic degradation-resistant pollutants as claimed in claim 1, wherein in step S10, the mixing time is 3-6 h after the surfactant is added.
6. The method for treating soil organic refractory pollutants as claimed in claim 1, wherein in step S20, the heating process is performed in a nitrogen stream.
7. The method for treating soil organic refractory pollutants as claimed in claim 1, wherein in step S20, after spraying the soil with the aqueous solution of sodium persulfate, the soil is treated with ultrasound.
8. The method for treating soil organic degradation-resistant pollutants according to claim 7, wherein the ultrasonic conditions are that the ultrasonic frequency is 30 kHz-100 kHz, the ultrasonic power is 50W-300W, and the ultrasonic irradiation time is 3-4.5 h.
9. The method for treating soil organic refractory pollutants as claimed in claim 1, further comprising:
and step S30, adding quicklime into the soil after the degradation reaction in the step S20 is finished, and uniformly stirring.
10. The method for treating soil organic refractory pollutants as claimed in claim 9, wherein the amount of the quicklime added is 5-10% of the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111496310.3A CN114433616A (en) | 2021-12-08 | 2021-12-08 | Method for treating soil organic degradation-resistant pollutants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111496310.3A CN114433616A (en) | 2021-12-08 | 2021-12-08 | Method for treating soil organic degradation-resistant pollutants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114433616A true CN114433616A (en) | 2022-05-06 |
Family
ID=81364815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111496310.3A Pending CN114433616A (en) | 2021-12-08 | 2021-12-08 | Method for treating soil organic degradation-resistant pollutants |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114433616A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976348A (en) * | 1998-03-30 | 1999-11-02 | Tennessee Valley Authority, United States Corporation | In situ remediation of soils containing organic contaminants using the electromigration of peroxysulfate ions |
| AU2008279649A1 (en) * | 2007-07-23 | 2009-01-29 | Verutek Technologies, Inc. | Enhanced biodegradation of non-aqueous phase liquids using surfactant enhanced in-situ chemical oxidation |
| CN106269823A (en) * | 2016-08-25 | 2017-01-04 | 杭州大地环保工程有限公司 | A kind of restorative procedure of high-enriched organics contaminated soil |
| CN109108067A (en) * | 2018-10-29 | 2019-01-01 | 南京贻润环境科技有限公司 | Utilize the method for ultrasound and surfactant renovation of heavy metal polluted soil with combined |
| CN110157443A (en) * | 2019-04-18 | 2019-08-23 | 江苏洁壤环保科技有限公司 | The composition of DDT and its application in a kind of processing contaminated soil |
| CN110814006A (en) * | 2019-11-08 | 2020-02-21 | 暨南大学 | Method for repairing organic matter contaminated soil by strengthening persulfate |
| CN111940485A (en) * | 2020-07-02 | 2020-11-17 | 广州市第一市政工程有限公司 | Chemical oxidation remediation agent for organic contaminated soil |
| CN112457858A (en) * | 2020-11-05 | 2021-03-09 | 北辰(上海)环境科技有限公司 | Chemical oxidation remediation agent for organic contaminated soil and use method |
-
2021
- 2021-12-08 CN CN202111496310.3A patent/CN114433616A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976348A (en) * | 1998-03-30 | 1999-11-02 | Tennessee Valley Authority, United States Corporation | In situ remediation of soils containing organic contaminants using the electromigration of peroxysulfate ions |
| AU2008279649A1 (en) * | 2007-07-23 | 2009-01-29 | Verutek Technologies, Inc. | Enhanced biodegradation of non-aqueous phase liquids using surfactant enhanced in-situ chemical oxidation |
| CN106269823A (en) * | 2016-08-25 | 2017-01-04 | 杭州大地环保工程有限公司 | A kind of restorative procedure of high-enriched organics contaminated soil |
| CN109108067A (en) * | 2018-10-29 | 2019-01-01 | 南京贻润环境科技有限公司 | Utilize the method for ultrasound and surfactant renovation of heavy metal polluted soil with combined |
| CN110157443A (en) * | 2019-04-18 | 2019-08-23 | 江苏洁壤环保科技有限公司 | The composition of DDT and its application in a kind of processing contaminated soil |
| CN110814006A (en) * | 2019-11-08 | 2020-02-21 | 暨南大学 | Method for repairing organic matter contaminated soil by strengthening persulfate |
| CN111940485A (en) * | 2020-07-02 | 2020-11-17 | 广州市第一市政工程有限公司 | Chemical oxidation remediation agent for organic contaminated soil |
| CN112457858A (en) * | 2020-11-05 | 2021-03-09 | 北辰(上海)环境科技有限公司 | Chemical oxidation remediation agent for organic contaminated soil and use method |
Non-Patent Citations (2)
| Title |
|---|
| 刘希涛: "《活化过硫酸盐在环境污染控制中的应用》", 30 April 2018, 中国环境出版集团 * |
| 肖鹏飞 等: "活化过硫酸盐氧化法修复有机污染土壤的研究进展", 《化工进展》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tang et al. | Enhanced photocatalytic performance of BiVO4 for degradation of methylene blue under LED visible light irradiation assisted by peroxymonosulfate | |
| CN106753386B (en) | Composition for treating high-concentration organophosphorus pesticide contaminated soil and application thereof | |
| CN101502838B (en) | Novel technique for harmless treatment of medical refuse burning flyash | |
| JP3772961B2 (en) | Method for treating exhaust gas containing dioxin and composite catalyst for dioxin suppression | |
| CN112457858A (en) | Chemical oxidation remediation agent for organic contaminated soil and use method | |
| CN101293173B (en) | Novel method for processing dioxins in fly ash | |
| CN106493162A (en) | A kind of method that PAEs contaminated soils repaired by microwave reinforced calper calcium peroxide | |
| CN103319066B (en) | A kind of deep dehydration method for sludge | |
| CN106391674A (en) | Harmless treatment method for cyanide-containing waste residues | |
| CN104108844B (en) | A kind of municipal sludge prepares the method for fuel | |
| CN106623382A (en) | Method for repairing organochlorine pesticide-polluted soil through microwave-enhanced sodium percarbonate | |
| CN106115841A (en) | The system of ammoniacal nitrogen in a kind of pair of optoelectronic pole photochemical catalytic oxidation water | |
| CN110961450B (en) | Method for degrading naphthalene in soil through microwave-induced synergistic catalytic oxidation | |
| CN111054341A (en) | Preparation method and application of bimetal oxide loaded activated carbon fiber composite electrode | |
| CN103819124A (en) | High-molecular organic-inorganic composite chemical for processing incineration fly ash and application thereof | |
| CN111121048B (en) | Efficient control method for dioxin in waste incineration | |
| CN115090312B (en) | Preparation method and application of MOF-derived Co and Zn-doped porous carbon nitride catalyst | |
| Yang et al. | Coupled microwave hydrothermal dechlorination and geopolymer preparation for the solidification/stabilization of heavy metals and chlorine in municipal solid waste incineration fly ash | |
| CN114433616A (en) | Method for treating soil organic degradation-resistant pollutants | |
| CN114405962A (en) | Method for efficiently removing ammonia nitrogen in electrolytic manganese slag | |
| CN106914483A (en) | A kind of chelating agent aids in nZVI/Na2CO4The method for cooperateing with rehabilitating soil organo-chlorine pesticide | |
| CN104045130B (en) | Bentonite-Fe-C composite water disposal agent and its preparation method and application | |
| CN1185440C (en) | Method and industrial apparatus for treating organic halides by plasma combustion | |
| CN105920995A (en) | Harmless recovery and treatment method for metallurgical industry chlorine-containing tail gas | |
| CN106006765B (en) | It is a kind of to handle the composition of Polychlorinated biphenyls and its application in soil elution liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 450040 west house, floor 5, unit 6, block B, fengyasong Tianjiao University South District, Sanquan Road, Jinshui District, Zhengzhou City, Henan Province Applicant after: Zhengkai Group Co.,Ltd. Address before: 450000 west house, floor 5, unit 6, block B, fengyasong Tianjiao University South District, Sanquan Road, Jinshui District, Zhengzhou City, Henan Province Applicant before: Henan Zhengkai Environmental Protection Engineering Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220506 |
|
| RJ01 | Rejection of invention patent application after publication |