CN105312313A - Catalytic degradation method for petroleum-contaminated soil - Google Patents
Catalytic degradation method for petroleum-contaminated soil Download PDFInfo
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- CN105312313A CN105312313A CN201410361952.6A CN201410361952A CN105312313A CN 105312313 A CN105312313 A CN 105312313A CN 201410361952 A CN201410361952 A CN 201410361952A CN 105312313 A CN105312313 A CN 105312313A
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Abstract
The invention discloses a catalytic degradation method for petroleum-contaminated soil. The catalytic degradation method for the petroleum-contaminated soil is characterized in that a mixture of the contaminated soil, water and a catalyst is added into a polytetrafluoroethylene sealed pot and then is placed in a microwave digestion instrument for degradation; the mass of the added catalyst accounts for 0.2%-1.0% of the mass of the contaminated soil, and the mass of the added water accounts for 5.0%-30.0% of the mass of the contaminated soil; the microwave treatment time is 3-11 minutes; according to the microwave treatment conditions, the microwave frequency is 2450 MHz, the rated microwave output power is 400 W, and the pressure is 0.2 MPa. According to the catalytic degradation method for the petroleum-contaminated soil, the pollutant removal efficiency is high, the speed is high, operation is easy, and the cost is low; microwave chemical degradation is conducted, the catalyst added into the contaminated soil is the substance contained in the soil, no toxic effect on the soil can be caused, secondary pollution is avoided, and the method is an environment-friendly method for treating organic compounds in the soil.
Description
Technical field
The present invention relates to a kind of catalytic degradation method of oil-polluted soils.
Background technology
Oil is being opened in Bian, transport, processing and consumption process, be difficult to avoid polluting soil, its main component is the various hydrocarbons such as alkane, cycloalkane and aromatic hydrocarbon, some of them organic compound can disturb animal internal system, the procreation of impact biology and the mankind, make immune dysfunction, there is carcinogenic, teratogenesis and cause the effect of gene mutation, serious threat is produced to human health and environmental quality.In addition, petroleum hydrocarbon organic compound is more stable in soil, is difficult to degraded, the pollution of soil environment is had to the trend constantly increased the weight of.Thus, be to go to its improvement.At present, the recovery technique that Bian economy and environment benefit combines administers soil petroleum pollution, is more and more subject to the attention of environmental protection department and oil exploitation industry.
At present, the recovery technique about oil-polluted soils mainly comprises peripheral doses, biological prosthetic and chemical redemption.Mainly there is disposal cost height and repair halfway shortcoming in peripheral doses method.Although biological renovation method have disposal cost low, do not produce the advantages such as secondary pollution, in actual process, comparatively obvious, restive by environmental factor and weather influence, and repairing efficiency is longer.
Summary of the invention
For solving above-mentioned existing shortcoming, main purpose of the present invention is the catalytic degradation method of the oil-polluted soils providing a kind of practicality, simple, quick, efficiently, not produce secondary pollution.
For reaching above-described object, the catalytic degradation method of a kind of oil-polluted soils of the present invention takes following technical scheme:
A kind of catalytic degradation method of oil-polluted soils, it is characterized in that, by the mixture of Polluted Soil Reel, water, catalyst in the hermetically sealed can of polytetrafluoroethylene (PTFE), be placed in microwave dissolver to degrade, the addition of catalyst is 0.2% ~ 1.0% of contaminated soil quality, and the addition of water is 5.0% ~ 30.0% of contaminated soil quality, microwave treatment time is 3 ~ 11 minutes, microwave treatment conditions: microwave frequency 2450MHz, specified microwave output power 400W, pressure 0.2Mpa.
Described catalyst is one or both of active carbon, tri-iron tetroxide or nano titanium oxide, and the addition of described water is 16.0% ~ 20.0% of contaminated soil quality.
Adopt the present invention of as above technical scheme, there is following beneficial effect:
1, operation is easy to.The present invention makes the process of contaminated soil simple.Only contaminated soil need be carried out simple process that is air-dry, mixing of sieving, the mixture of one or both catalyst of a small amount of active carbon, tri-iron tetroxide or nano titanium oxide and contaminated soil are carried out mechanical mixture, regulate water content, then soil sample is proceeded in the hermetically sealed can of polytetrafluoroethylene (PTFE), process under microwave condition.
2, secondary pollution is not produced.The invention belongs to microwave chemical degraded, the material that the catalyst system soil itself added in contaminated soil has, can not produce toxic action to soil, not cause secondary pollution, is the method for organic compound in a kind of environmentally friendly process soil.
3, the speed removing pollutant is fast, and efficiency is high.Microwave treatment conditions; Microwave frequency 2450MHz, the hermetically sealed can volume 50ml of specified microwave output power 400W, pressure 0.2MPa polytetrafluoroethylene (PTFE).Regulate the mass ratio of moisture, catalyst and contaminated soil, optimize digestion time, greatly can improve the degradation efficiency of total petroleum hydrocarbon in soil.When microwave digestion time is 5 minutes, degradation rate can reach 73.25%.
4, with low cost.The consumption of catalyst and moisture is little, and the addition of catalyst is 0.2% of contaminated soil quality, and the addition of water is 16.0% of contaminated soil quality, and degradation rate can reach 84.52%.
Detailed description of the invention
In order to further illustrate the present invention, below in conjunction with example, the present invention is further described:
Material: contaminated soil: soil sample Bian is from Liaohe Oil Field Xinglongtai Bian oil district, and sample is air-dry in indoor dark place, grind, to mix 1 ㎜ sieve for subsequent use.
Active carbon: analyze pure, specific area is 0.5m
2/ g, average grain diameter 0.3 ㎜.Tri-iron tetroxide: analyze pure.
Nano titanium oxide: anatase titanium dioxide, specific area 50m
2/ g, average grain diameter 15 ~ 20 ㎜.
Embodiment 1.
Take 10g contaminated soil, 2g moisture, add the catalyst of 0.1g by table 1 respectively, mechanical agitation is to even.
By contaminated soil, water, catalyst in the hermetically sealed can of 50ml polytetrafluoroethylene (PTFE), be placed in microwave dissolver and degrade, degradation time is respectively 3 minutes, 5 minutes, 7 minutes, 9 minutes and 11 minutes.
Microwave treatment conditions: microwave frequency 2450MHz, specified microwave output power 400W, pressure 0.2Mpa.
Contaminated soil after above-mentioned degraded is carried out to the extraction and determination of total petroleum hydrocarbon: the soil sample after degraded being terminated proceeds in 50ml centrifuge tube, add 20ml carrene, ultrasonic wave ice bath extracts 30 minutes, centrifugal 5 minutes of 4000rmp, repeat ultrasonic and centrifugal three times, ultraviolet spectrophotometer method measures the content of total petroleum hydrocarbon, calculates degradation rate, the results are shown in Table 1.
Table 1
The degradation rate adding active carbon is respectively 26.73% ~ 69.65%, is optimum time when microwave digestion time is 7 minutes, and degradation rate is 69.65%; The degradation rate adding tri-iron tetroxide is respectively 41.96% ~ 73.25%, is optimum time when microwave digestion time is 5 minutes, and degradation rate is 73.25%; The degradation rate adding nano titanium oxide is respectively 24.20% ~ 58.55%, and be optimum time when microwave digestion time is 7 minutes, degradation rate reaches 58.55%; The degradation rate adding active carbon and nanometer titanium dioxide carbon (1:1) mixture is respectively 33.58% ~ 43.81%, is optimum time when microwave digestion time is 7 minutes, and degradation rate is 43.81%.
Embodiment 2
Take 10g contaminated soil, add the catalyst of 0.02g by table 2 respectively, the addition of water is respectively 10.0%, 16.0%, 20.0%, 24.0% and 30.0% of contaminated soil quality, and mechanical agitation is to even.
By contaminated soil, water, catalyst in the hermetically sealed can of 50ml polytetrafluoroethylene (PTFE), be placed in microwave dissolver and degrade, degradation time is 7 minutes.
Microwave treatment conditions: microwave frequency 2450MHz, specified microwave output power 400W, pressure 0.2MPa.
Total petroleum hydrocarbon extraction and determination is carried out to the contaminated soil after above-mentioned degraded: the soil sample after degraded being terminated proceeds in 50ml centrifuge tube, add 20ml carrene, ultrasonic wave ice bath extracts 30 minutes, centrifugal 5 minutes of 4000rmp, repeat ultrasonic and centrifugal three times, ultraviolet spectrophotometer method measures the content of total petroleum hydrocarbon, calculates degradation rate, the results are shown in Table 2.
Through the micro-wave digestion of 7 minutes, take active carbon as catalyst, when changing the consumption of water, degradation rate is respectively 70.05% ~ 78.69%, and be optimal dose when the addition of moisture is 20.0% of contaminated soil quality, degradation rate reaches 78.69%; Take tri-iron tetroxide as catalyst, when changing the consumption of water, degradation rate is respectively 64.44% ~ 84.21%, and be optimal dose when the addition of moisture is 16.0% of contaminated soil quality, degradation rate reaches 84.21%; Take nano titanium oxide as catalyst, when changing the consumption of water, degradation rate is respectively 64.49% ~ 84.52%, be optimal dose when the addition of moisture is 16.0% of contaminated soil quality, degradation rate reaches 84.52%, with active carbon and nano titanium oxide (1:1) for catalyst, when changing the consumption of water, degradation rate is respectively 56.91% ~ 79.63%, and be optimal dose when the addition of moisture is 16.0% of contaminated soil quality, degradation rate reaches 79.63%.
Claims (2)
1. the catalytic degradation method of an oil-polluted soils, it is characterized in that, by the mixture of Polluted Soil Reel, water, catalyst in the hermetically sealed can of polytetrafluoroethylene (PTFE), be placed in microwave dissolver to degrade, the addition of catalyst is 0.2% ~ 1.0% of contaminated soil quality, and the addition of water is 5.0% ~ 30.0% of contaminated soil quality, microwave treatment time is 3 ~ 11 minutes, microwave treatment conditions: microwave frequency 2450MHz, specified microwave output power 400W, pressure 0.2Mpa.
2. the catalytic degradation method of a kind of oil-polluted soils according to claim 1, it is characterized in that, described catalyst is one or both of active carbon, tri-iron tetroxide or nano titanium oxide, and the addition of described water is 16.0% ~ 20.0% of contaminated soil quality.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410361952.6A CN105312313A (en) | 2014-07-28 | 2014-07-28 | Catalytic degradation method for petroleum-contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410361952.6A CN105312313A (en) | 2014-07-28 | 2014-07-28 | Catalytic degradation method for petroleum-contaminated soil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107363087A (en) * | 2017-09-13 | 2017-11-21 | 西南科技大学 | A kind of processing method of Petroleum concentration soil |
| CN110479753A (en) * | 2019-07-30 | 2019-11-22 | 广东工业大学 | A kind of microwave catalysis oxidation device and method of organic polluted soil |
| WO2021142511A1 (en) * | 2020-01-16 | 2021-07-22 | Amt Remediation Pty Ltd | Pfas processing |
-
2014
- 2014-07-28 CN CN201410361952.6A patent/CN105312313A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107363087A (en) * | 2017-09-13 | 2017-11-21 | 西南科技大学 | A kind of processing method of Petroleum concentration soil |
| CN110479753A (en) * | 2019-07-30 | 2019-11-22 | 广东工业大学 | A kind of microwave catalysis oxidation device and method of organic polluted soil |
| WO2021142511A1 (en) * | 2020-01-16 | 2021-07-22 | Amt Remediation Pty Ltd | Pfas processing |
| AU2021208710B2 (en) * | 2020-01-16 | 2023-08-03 | Amt Remediation Pty Ltd | PFAS processing |
| EP4090478A4 (en) * | 2020-01-16 | 2024-01-17 | Amt Remediation Pty Ltd | Pfas processing |
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Application publication date: 20160210 |