CN111097791A - Remediation method for pesticide-contaminated soil - Google Patents
Remediation method for pesticide-contaminated soil Download PDFInfo
- Publication number
- CN111097791A CN111097791A CN201911395328.7A CN201911395328A CN111097791A CN 111097791 A CN111097791 A CN 111097791A CN 201911395328 A CN201911395328 A CN 201911395328A CN 111097791 A CN111097791 A CN 111097791A
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- China
- Prior art keywords
- soil
- solution
- tritonx
- hexachlorocyclopentadiene
- pesticide
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Classifications
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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
Abstract
The invention discloses a method for restoring soil polluted by pesticides, which has the technical scheme that the method comprises the following steps of 1) crushing the soil polluted by hexachlorocyclopentadiene, adding TritonX-100 and/or β -cyclodextrin solution or mixed solution of TritonX-100 and sodium polyacrylate, mixing the soil and the solution according to the proportion of 1Kg to 5-10L, 2) fully stirring the mixture obtained in the step 1), standing, 3) carrying out solid-liquid separation on the mixture obtained in the step 2) to obtain purified soil and filtrate, wherein the method is implemented at normal temperature and normal pressure, the investment is low, the implementation is simple and rapid, and the purification effect is good.
Description
Technical Field
The invention relates to the technical field of soil remediation methods, in particular to a remediation method for pesticide-contaminated soil.
Background
The rapid development of agricultural production for a long time cannot be separated from the use of chemical pesticides, and the pesticides not only can be remained in food and bring hidden danger to food safety, but also can be enriched and accumulated in soil through long-term application and use. Particularly, POPs are extremely harmful to the food chain of animals and plants and are extremely destructive to the ecology because of their difficult degradability. The general treatment methods for POPs agricultural chemicals include a redox chemical treatment method, a microbial degradation method, a high-temperature heat treatment method, and the like. However, these methods are difficult to purify and restore hexachlorocyclopentadiene-contaminated soil at normal temperature and pressure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention mainly aims to provide the method for restoring the pesticide-polluted soil, which is implemented at normal temperature and normal pressure, has low investment, simple and quick implementation and good purification effect.
In order to achieve the purpose, the invention provides the following technical scheme: a method for remedying pesticide-contaminated soil comprises the following steps,
1) crushing the soil polluted by hexachlorocyclopentadiene, adding TritonX-100 and/or β -cyclodextrin solution or mixed solution of TritonX-100 and sodium polyacrylate, and mixing the soil and the solution according to the proportion of 1Kg to 5-10L;
2) fully stirring the mixture obtained in the step 1) and standing;
3) and carrying out solid-liquid separation on the mixture obtained in the step 2) to obtain purified soil and filtrate.
Preferably, the mass concentration of the TritonX-100 solution, the β -cyclodextrin solution and the sodium polyacrylate solution is 50 g/L.
Preferably, the mixture in the step 2) is stirred for 5min and is kept still for 25 min.
Compared with the prior art, the method has the advantages that the soil polluted by hexachlorocyclopentadiene can be effectively purified at normal temperature and normal pressure, the degradation rate of hexachlorocyclopentadiene in the soil is 69.3-89.8%, and compared with a redox chemical treatment method, a microbial degradation method and a high-temperature heat treatment method in the prior art, the method has the advantages of low investment, simplicity and rapidness in implementation and good purification effect.
Detailed Description
The present invention will be further described with reference to examples.
A method for remedying pesticide-contaminated soil comprises the following steps,
1) crushing the soil polluted by hexachlorocyclopentadiene, adding TritonX-100 and/or β -cyclodextrin solution or mixed solution of TritonX-100 and sodium polyacrylate, and mixing the soil and the solution according to the proportion of 1Kg to 5-10L;
2) fully stirring the mixture obtained in the step 1) and standing;
3) and carrying out solid-liquid separation on the mixture obtained in the step 2) to obtain purified soil and filtrate.
Preferably, the mass concentration of the TritonX-100 solution, the β -cyclodextrin solution and the sodium polyacrylate solution is 50 g/L.
Preferably, the mixture in the step 2) is stirred for 5min and is kept still for 25 min.
In particular, reference is made to the following examples:
the first embodiment is as follows:
1. crushing hexachlorocyclopentadiene contaminated soil, adding TritonX-100 (50 g/L) solution, and mixing the soil and the extracting solution according to the weight ratio of 1 Kg: mixing at a ratio of 5L;
2. stirring thoroughly (5 min), standing for 25 min;
3. and (4) carrying out solid-liquid separation, and after dehydration, respectively collecting the soil and filtrate and carrying out detection and analysis.
The hexachlorocyclopentadiene concentration in the soil before the soil treatment is 186mg/kg, and the degradation rate of hexachlorocyclopentadiene in the treated soil is 69.3%.
Example two:
1. crushing hexachlorocyclopentadiene contaminated soil, adding a cyclodextrin (50 g/L) solution, and mixing the soil and an extracting solution according to the weight ratio of 1 Kg: mixing at a ratio of 10L;
2. stirring thoroughly (5 min), standing for 25 min;
3. and (4) carrying out solid-liquid separation, and after dehydration, respectively collecting the soil and filtrate and carrying out detection and analysis.
The hexachlorocyclopentadiene concentration in the soil before the soil treatment is 186mg/kg, and the degradation rate of the hexachlorocyclopentadiene in the soil after the soil treatment is 89.8%.
Example three:
1. crushing hexachlorocyclopentadiene contaminated soil, adding a mixed solution of TritonX-100 (50 g/L) and cyclodextrin (50 g/L), and mixing the soil and an extracting solution according to the weight ratio of 1 Kg: mixing at a ratio of 5L;
2. stirring thoroughly (5 min), standing for 25 min;
3. and (4) carrying out solid-liquid separation, and after dehydration, respectively collecting the soil and filtrate and carrying out detection and analysis.
The hexachlorocyclopentadiene concentration in the soil before the soil treatment is 186mg/kg, and the degradation rate of hexachlorocyclopentadiene in the treated soil is 84.5%.
Example four:
1. crushing hexachlorocyclopentadiene contaminated soil, adding a mixed solution of TritonX-100 (5 g/L) and sodium polyacrylate (3 g/L), and mixing the soil and an extracting solution according to the weight ratio of 1 Kg: mixing at a ratio of 5L;
2. stirring thoroughly (5 min), standing for 25 min;
3. and (4) carrying out solid-liquid separation, and after dehydration, respectively collecting the soil and filtrate and carrying out detection and analysis.
The hexachlorocyclopentadiene concentration in the soil before the soil treatment is 186mg/kg, and the degradation rate of hexachlorocyclopentadiene in the treated soil is 84.8%.
In conclusion, the invention can effectively purify the soil polluted by hexachlorocyclopentadiene at normal temperature and normal pressure, the degradation rate of hexachlorocyclopentadiene in the soil is 69.3-89.8%, and compared with the redox chemical treatment method, the microbial degradation method and the high-temperature heat treatment method in the prior art, the invention has the advantages of low investment, simple and rapid implementation and good purification effect.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (3)
1. A method for restoring pesticide contaminated soil is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
1) crushing the soil polluted by hexachlorocyclopentadiene, adding TritonX-100 and/or β -cyclodextrin solution or mixed solution of TritonX-100 and sodium polyacrylate, and mixing the soil and the solution according to the proportion of 1Kg to 5-10L;
2) fully stirring the mixture obtained in the step 1) and standing;
3) and carrying out solid-liquid separation on the mixture obtained in the step 2) to obtain purified soil and filtrate.
2. The method for remediating pesticide-contaminated soil as recited in claim 1, wherein the mass concentration of the TritonX-100 solution, the β -cyclodextrin solution and the sodium polyacrylate solution is 50 g/L.
3. The remediation method for pesticide-contaminated soil according to claim 1, characterized in that: and stirring the mixture in the step 2) for 5min, and standing for 25 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395328.7A CN111097791A (en) | 2019-12-30 | 2019-12-30 | Remediation method for pesticide-contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395328.7A CN111097791A (en) | 2019-12-30 | 2019-12-30 | Remediation method for pesticide-contaminated soil |
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| Publication Number | Publication Date |
|---|---|
| CN111097791A true CN111097791A (en) | 2020-05-05 |
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| CN201911395328.7A Pending CN111097791A (en) | 2019-12-30 | 2019-12-30 | Remediation method for pesticide-contaminated soil |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006247609A (en) * | 2005-03-14 | 2006-09-21 | Mitsui Eng & Shipbuild Co Ltd | Microbial treatment method of organic chlorine compound-containing soil |
| CN101670363A (en) * | 2009-09-24 | 2010-03-17 | 江苏大学 | Method for eluting and restoring 1,2,4-trichlorobenzene polluted soil by cyclodextrin solution |
| CN102211795A (en) * | 2011-04-20 | 2011-10-12 | 华中科技大学 | Method for regenerating eluant in organic polluted soil eluent |
| CN106623382A (en) * | 2016-12-22 | 2017-05-10 | 常州大学 | Method for repairing organochlorine pesticide-polluted soil through microwave-enhanced sodium percarbonate |
| CN109382402A (en) * | 2017-08-03 | 2019-02-26 | 中国石油化工股份有限公司 | The method and its application of petroleum hydrocarbon in a kind of removal soil |
-
2019
- 2019-12-30 CN CN201911395328.7A patent/CN111097791A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006247609A (en) * | 2005-03-14 | 2006-09-21 | Mitsui Eng & Shipbuild Co Ltd | Microbial treatment method of organic chlorine compound-containing soil |
| CN101670363A (en) * | 2009-09-24 | 2010-03-17 | 江苏大学 | Method for eluting and restoring 1,2,4-trichlorobenzene polluted soil by cyclodextrin solution |
| CN102211795A (en) * | 2011-04-20 | 2011-10-12 | 华中科技大学 | Method for regenerating eluant in organic polluted soil eluent |
| CN106623382A (en) * | 2016-12-22 | 2017-05-10 | 常州大学 | Method for repairing organochlorine pesticide-polluted soil through microwave-enhanced sodium percarbonate |
| CN109382402A (en) * | 2017-08-03 | 2019-02-26 | 中国石油化工股份有限公司 | The method and its application of petroleum hydrocarbon in a kind of removal soil |
Non-Patent Citations (1)
| Title |
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| 李玉双等: "污染土壤淋洗修复技术研究进展", 《生态学杂志》 * |
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Application publication date: 20200505 |