CN117225877A - Treatment method for benzo (a) pyrene pollution in soil - Google Patents
Treatment method for benzo (a) pyrene pollution in soil Download PDFInfo
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- CN117225877A CN117225877A CN202311155642.4A CN202311155642A CN117225877A CN 117225877 A CN117225877 A CN 117225877A CN 202311155642 A CN202311155642 A CN 202311155642A CN 117225877 A CN117225877 A CN 117225877A
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- soil
- benzo
- pyrene
- activated carbon
- ball milling
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- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000002689 soil Substances 0.000 title claims abstract description 69
- TXVHTIQJNYSSKO-UHFFFAOYSA-N BeP Natural products C1=CC=C2C3=CC=CC=C3C3=CC=CC4=CC=C1C2=C34 TXVHTIQJNYSSKO-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000011282 treatment Methods 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000000498 ball milling Methods 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 16
- 239000011324 bead Substances 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002957 persistent organic pollutant Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
The invention belongs to the technical field of organic matter polluted soil treatment, and provides a treatment method for benzo (a) pyrene pollution in soil. The method comprises the following steps: mixing the soil with the activated carbon, and performing ball milling to finish the treatment of benzo (a) pyrene pollution in the soil. According to the invention, a ball milling technology is utilized to generate mechanochemical action, so that on one hand, activated carbon is promoted to generate more adsorption sites, and the adsorption quantity of the activated carbon to benzo (a) pyrene is improved; on the other hand, the benzo (a) pyrene is embedded between soil particle frames by mechanochemical action, so that the bioavailability of the benzo (a) pyrene is reduced, and the environmental risk is further reduced. The invention solves the problems of low utilization rate of the activated carbon in soil medium and more capacity increment in the polluted soil restoration process, and has the advantages of mild reaction conditions, simple operation, cleanness, high efficiency and wide application range. The treatment method has wide application prospect.
Description
Technical Field
The invention relates to the technical field of organic matter polluted soil treatment, in particular to a treatment method for benzo (a) pyrene pollution in soil.
Background
With the development of industries such as chemical industry, coal, steel, pesticides and the like, if the generated pollutants are not treated timely, certain ecological risks, especially pollution of field soil, can be brought. In many soil restoration methods, the thermal desorption technology has short restoration period, but needs ex-situ treatment, and has no obvious restoration effect on difficult volatile organic pollutants. The chemical oxidation/reduction technology is suitable for repairing various organic pollutants, and the repairing period is short, but the use of high-concentration oxidant or reducing agent increases the repairing cost, and the risk of damaging the physicochemical properties and ecological environment of the soil exists. Bioremediation technology generally has a longer period of bioremediation of hardly degradable organic pollutants with low bioavailability. The active carbon-based fixing/stabilizing technology has low cost, is suitable for repairing heavy metals and partial semi-volatile organic pollutants, but the insufficient utilization of the adsorbent can lead to excessive addition of the adsorbent, so that the soil is seriously compatibilized.
Therefore, the method for efficiently treating benzo (a) pyrene organic matter pollution in soil has very important significance.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a treatment method for benzo (a) pyrene pollution in soil.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a treatment method for benzo (a) pyrene pollution in soil, which comprises the following steps:
mixing the soil with the activated carbon, and performing ball milling to finish the treatment of benzo (a) pyrene pollution in the soil.
Preferably, the concentration of benzo (a) pyrene in the soil is 0.5 to 3.5mg/kg.
Preferably, the particle size of the activated carbon is 60 to 200 mesh.
Preferably, the mass ratio of the soil to the activated carbon is 1-100: 1.
preferably, the ball-milling beads used for ball milling are made of zirconia.
Preferably, the mass ratio of the soil to the ball-milling beads is 0.01-1: 1.
preferably, the rotation speed of the ball mill is 200-800 r/min.
Preferably, the ball milling time is 30-600 min.
The beneficial effects of the invention are as follows:
the invention provides a treatment method for benzo (a) pyrene pollution in soil, which comprises the following steps: mixing the soil with the activated carbon, and performing ball milling to finish the treatment of benzo (a) pyrene pollution in the soil. According to the invention, a ball milling technology is utilized to generate mechanochemical action, so that on one hand, activated carbon is promoted to generate more adsorption sites, and the adsorption quantity of the activated carbon to benzo (a) pyrene is improved; on the other hand, the benzo (a) pyrene is embedded between soil particle frames by mechanochemical action, so that the bioavailability of the benzo (a) pyrene is reduced, and the environmental risk is further reduced. The invention solves the problems of low utilization rate of the activated carbon in soil medium and more capacity increment in the polluted soil restoration process, and has the advantages of mild reaction conditions, simple operation, cleanness, high efficiency and wide application range. The treatment method has wide application prospect.
Detailed Description
The invention provides a treatment method for benzo (a) pyrene pollution in soil, which comprises the following steps:
mixing the soil with the activated carbon, and performing ball milling to finish the treatment of benzo (a) pyrene pollution in the soil.
In the present invention, the concentration of benzo (a) pyrene in the soil is preferably 0.5 to 3.5mg/kg, more preferably 1 to 3mg/kg, and still more preferably 1.5 to 2mg/kg.
In the present invention, the particle size of the activated carbon is preferably 60 to 200 mesh, more preferably 80 to 150 mesh, and even more preferably 100 to 120 mesh.
In the invention, the mass ratio of the soil to the activated carbon is preferably 1-100: 1, more preferably 5 to 80:1, more preferably 20 to 50:1.
in the invention, the ball milling is carried out in a zirconia ball milling tank, ball milling balls are added during the ball milling, and the ball milling balls used in the ball milling are preferably made of zirconia.
In the invention, the mass ratio of the soil to the ball-milling beads is preferably 0.01-1: 1, more preferably 0.1 to 0.8:1, more preferably 0.2 to 0.5:1.
in the present invention, the rotational speed of the ball mill is preferably 200 to 800r/min, more preferably 300 to 700r/min, and still more preferably 500 to 600r/min.
In the present invention, the time of the ball milling is preferably 30 to 600 minutes, more preferably 60 to 500 minutes, and still more preferably 90 to 350 minutes.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Mixing 10g of soil (the concentration of benzo (a) pyrene in the soil is 2 mg/kg) and 0.5g of active carbon with the particle size of 100 meshes, placing the mixture into a zirconia ball mill tank, adding 50g of zirconia ball mill beads, and ball milling for 120min in a planetary ball mill at the rotating speed of 500r/min to finish the treatment of benzo (a) pyrene pollution in the soil.
Example 2
The other conditions in example 1 were controlled to be unchanged, and the mass of the activated carbon was modified to 1.0g.
Example 3
The other conditions in example 1 were controlled to be unchanged, and the mass of the activated carbon was modified to 1.5g.
Example 4
The other conditions in example 1 were controlled to be unchanged, and the mass of the activated carbon was modified to 2.0g.
Example 5
Other conditions in example 1 were controlled and the rotational speed of the ball mill was modified to 350r/min.
Example 6
Other conditions in example 1 were controlled and the rotational speed of the ball mill was modified to 650r/min.
Example 7
The other conditions in example 1 were controlled and the ball milling time was modified to 60min.
Example 8
The other conditions in example 1 were controlled and the ball milling time was modified to 180min.
Example 9
The other conditions in example 1 were controlled and the ball milling time was modified to 240min.
Example 10
The other conditions in example 1 were controlled to be unchanged, and the particle size of the activated carbon was modified to 60 mesh.
Example 11
The other conditions in example 1 were controlled to be unchanged, and the particle size of the activated carbon was modified to 150 mesh.
Example 12
The other conditions in example 1 were controlled to be unchanged, and the particle size of the activated carbon was modified to 200 mesh.
Comparative example 1
10g of soil (the concentration of benzo (a) pyrene in the soil is 2 mg/kg) and 0.5g of active carbon with the particle size of 100 meshes are mixed, placed into a centrifuge tube, and oscillated for 120min at the temperature of 25 ℃ and the rotating speed of 200r/min to finish the treatment of benzo (a) pyrene pollution in the soil.
Comparative example 2
Mixing 10g of soil (the concentration of benzo (a) pyrene in the soil is 2 mg/kg) and 50g of zirconia ball milling beads, placing the mixture in a zirconia ball milling tank, and ball milling the mixture in a planetary ball mill for 120min at the rotating speed of 500r/min to finish the treatment of benzo (a) pyrene pollution in the soil.
Benzo (a) pyrene in the soil after the treatments of examples 1 to 12 and comparative examples 1 to 2 was tested to obtain curing results of benzo (a) pyrene in examples 1 to 12 and comparative examples 1 to 2, as shown in Table 1.
TABLE 1 curing results of benzo (a) pyrene in examples 1-12 and comparative examples 1-2
| Test | Benzo (a) pyrene curing Rate |
| Example 1 | 75.2％ |
| Example 2 | 76.5％ |
| Example 3 | 76.7％ |
| Example 4 | 76.9％ |
| Example 5 | 68.3％ |
| Example 6 | 74.1％ |
| Example 7 | 65.7％ |
| Example 8 | 76.6％ |
| Example 9 | 76.9％ |
| Example 10 | 66.8％ |
| Example 11 | 73.5％ |
| Example 12 | 65.3％ |
| Comparative example 1 | 23.4％ |
| Comparative example 2 | 5.4％ |
As can be seen from Table 1, the ball milling coupling active carbon system has better treatment effect on benzo (a) pyrene in soil than other reaction systems; the quality of the activated carbon is increased within a certain range, the immobilization rate of benzo (a) pyrene in the soil can be improved, but when the quality of the activated carbon is increased beyond a certain range, the improvement effect of the immobilization rate of the benzo (a) pyrene is not obvious, and the addition amount of the activated carbon is controlled within a preferred range in consideration of the cost and the soil compatibilization problem; the ball milling rotating speed is increased within a certain range, so that the immobilization rate of benzo (a) pyrene in soil can be increased, but when the ball milling rotating speed exceeds a certain range, the rotating speed is continuously increased, so that the rapid agglomeration of soil particles can be caused, the contact between the activated carbon and the soil particles is influenced, and the immobilization rate of benzo (a) pyrene can be reduced; the ball milling time is prolonged within a certain range, so that the immobilization rate of benzo (a) pyrene in soil can be improved, but when the ball milling time exceeds a certain range, the immobilization rate of benzo (a) pyrene in soil is not obviously improved, and the time is controlled within a preferred range in consideration of the cost; when the particle size of the activated carbon is within a certain range, the curing effect of benzo (a) pyrene in the soil can be improved by reducing the particle size of the activated carbon, but the activated carbon particles are wrapped by the soil particles, so that the adsorption of the activated carbon to the benzo (a) pyrene in the soil is affected, and the curing rate of the benzo (a) pyrene in the soil is reduced.
As can be seen from the above examples, the present invention provides a method for treating benzo (a) pyrene pollution in soil, comprising the steps of: mixing the soil with the activated carbon, and performing ball milling to finish the treatment of benzo (a) pyrene pollution in the soil. According to the invention, a ball milling technology is utilized to generate mechanochemical action, so that on one hand, activated carbon is promoted to generate more adsorption sites, and the adsorption quantity of the activated carbon to benzo (a) pyrene is improved; on the other hand, the benzo (a) pyrene is embedded between soil particle frames by mechanochemical action, so that the bioavailability of the benzo (a) pyrene is reduced, and the environmental risk is further reduced. The invention solves the problems of low utilization rate of the activated carbon in soil medium and more capacity increment in the polluted soil restoration process, and has the advantages of mild reaction conditions, simple operation, cleanness, high efficiency and wide application range. The treatment method has wide application prospect.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A method for treating benzo (a) pyrene pollution in soil, comprising the steps of:
mixing the soil with the activated carbon, and performing ball milling to finish the treatment of benzo (a) pyrene pollution in the soil.
2. The method according to claim 1, wherein the concentration of benzo (a) pyrene in the soil is 0.5 to 3.5mg/kg.
3. The method according to claim 1 or 2, wherein the activated carbon has a particle size of 60 to 200 mesh.
4. A treatment method according to claim 3, wherein the mass ratio of soil to activated carbon is 1 to 100:1.
5. the method according to claim 4, wherein the ball-milling beads used in the ball milling are made of zirconia.
6. The method according to claim 5, wherein the mass ratio of soil to ball-milling beads is 0.01 to 1:1.
7. the process according to claim 6, wherein the rotational speed of the ball mill is 200 to 800r/min.
8. The process according to claim 7, wherein the ball milling is performed for 30 to 600 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311155642.4A CN117225877A (en) | 2023-09-08 | 2023-09-08 | Treatment method for benzo (a) pyrene pollution in soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311155642.4A CN117225877A (en) | 2023-09-08 | 2023-09-08 | Treatment method for benzo (a) pyrene pollution in soil |
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| CN117225877A true CN117225877A (en) | 2023-12-15 |
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| CN202311155642.4A Pending CN117225877A (en) | 2023-09-08 | 2023-09-08 | Treatment method for benzo (a) pyrene pollution in soil |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104605218A (en) * | 2015-02-16 | 2015-05-13 | 青海康普生物科技股份有限公司 | Method for reducing harmful benzo (a) pyrene in hippophae rhamnoides oil |
| JP2016010768A (en) * | 2014-06-30 | 2016-01-21 | 株式会社安藤・間 | Method for purifying contaminated soil |
| CN105562427A (en) * | 2015-08-11 | 2016-05-11 | 济南大学 | Treatment method of Benzo(a)pyrene contaminated soil |
| CN109226240A (en) * | 2018-10-17 | 2019-01-18 | 广州市花林景观工程有限公司 | A kind of catalytic type contaminated soil remediation device |
| CN110065999A (en) * | 2019-04-26 | 2019-07-30 | 上海大学 | The preparation method and applications of mechanical ball mill Modified Iron carbon material |
| CN113120899A (en) * | 2021-04-22 | 2021-07-16 | 河北工业大学 | Activated carbon and preparation method and application thereof |
| CN114289494A (en) * | 2021-12-31 | 2022-04-08 | 北京建工环境修复股份有限公司 | Remediation method for organic contaminated soil |
| US20220193738A1 (en) * | 2019-04-10 | 2022-06-23 | Queen's University At Kingston | Method for Remediationg Polyfluorocarbon-Contaminated Soil |
| CN114870801A (en) * | 2022-05-10 | 2022-08-09 | 南方科技大学 | Preparation method and application of modified charcoal adsorbent |
-
2023
- 2023-09-08 CN CN202311155642.4A patent/CN117225877A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016010768A (en) * | 2014-06-30 | 2016-01-21 | 株式会社安藤・間 | Method for purifying contaminated soil |
| CN104605218A (en) * | 2015-02-16 | 2015-05-13 | 青海康普生物科技股份有限公司 | Method for reducing harmful benzo (a) pyrene in hippophae rhamnoides oil |
| CN105562427A (en) * | 2015-08-11 | 2016-05-11 | 济南大学 | Treatment method of Benzo(a)pyrene contaminated soil |
| CN109226240A (en) * | 2018-10-17 | 2019-01-18 | 广州市花林景观工程有限公司 | A kind of catalytic type contaminated soil remediation device |
| US20220193738A1 (en) * | 2019-04-10 | 2022-06-23 | Queen's University At Kingston | Method for Remediationg Polyfluorocarbon-Contaminated Soil |
| CN110065999A (en) * | 2019-04-26 | 2019-07-30 | 上海大学 | The preparation method and applications of mechanical ball mill Modified Iron carbon material |
| CN113120899A (en) * | 2021-04-22 | 2021-07-16 | 河北工业大学 | Activated carbon and preparation method and application thereof |
| CN114289494A (en) * | 2021-12-31 | 2022-04-08 | 北京建工环境修复股份有限公司 | Remediation method for organic contaminated soil |
| CN114870801A (en) * | 2022-05-10 | 2022-08-09 | 南方科技大学 | Preparation method and application of modified charcoal adsorbent |
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