CN105562428A - Phenanthrene-contaminated soil treatment method - Google Patents
Phenanthrene-contaminated soil treatment method Download PDFInfo
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- CN105562428A CN105562428A CN201510486368.8A CN201510486368A CN105562428A CN 105562428 A CN105562428 A CN 105562428A CN 201510486368 A CN201510486368 A CN 201510486368A CN 105562428 A CN105562428 A CN 105562428A
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Abstract
The invention discloses a phenanthrene-contaminated soil treatment method. The method includes: airing or drying wheat stems, and pyrolyzing at 300-350 DEG C for 5-8 hours to obtain charcoal; respectively grinding the wheat stems and wheat bran, filtering through a 100-mesh screen, well mixing according to a proportion of 4:1 to obtain cellulose, performing high-pressure sterilizing at 121 DEG C for 20min, and subjecting a surfactant Brij30 to high-pressure sterilization before standby application; well mixing the charcoal, the cellulose and the surfactant according to a weight ratio of 2:2:1 to obtain a phenanthrene adsorbent; mixing the phenanthrene adsorbent and phenanthrene-contaminated soil according to a weight ratio of 1/8, regulating the moisture to be 40% of maximum water holding capacity of a field, mixing completely, and treating in the absence of light at 25-30 DEG C. The phenanthrene-contaminated soil treatment method is nontoxic and low in cost and avoids secondary environment pollution; after addition of the charcoal and the cellulose into the soil, an excellent soil improving agent can be obtained to improve soil productivity; since the charcoal and the cellulose are both prepared from agricultural wastes, low material cost is achieved, environment protection is benefited, requirements of cyclic economy are met, and promising application prospect in contaminated soil remediation is realized.
Description
Technical field
The present invention relates to a kind of processing method of contaminated soil, be specifically related to a kind of small-molecular-weight polycyclic aromatic hydrocarbon, i.e. the administering method of phenanthrene-polluted soil.
Background technology
Phenanthrene is a kind of thrcylic aromatic hydrocarbon, has the structure of typical polycyclic aromatic hydrocarbon, is the mark of fuel oil and motor vehicle exhaust emission polycyclic aromatic hydrocarbon, mainly exists in a gaseous form in an atmosphere, enters into soil environment by precipitation, is one of pollutant common in soil.Although the different in kind of phenanthrene is in the polycyclic aromatic hydrocarbon of HMW, there is carcinogenic and mutagenesis equally, enter human body by food chain, be detrimental to health.The eighties in 20th century, phenanthrene was just listed in one of organic compound first controlled by EPA, and China also early lists phenanthrene in the pollutant blacklist of Environment Priority monitoring.
At present, the method for administering phenanthrene-polluted soil mainly contains microorganism remediation, phytoremediation and physical chemistry reparation.Microorganism remediation needs to introduce inoculating microbe in soil, and the obligate degradation bacteria that these are introduced into or the effect of genetic engineering bacterium degrading polycyclic aromatic hydrocarbons are vulnerable to the impact of indigenous microorganism competition, also there is potential soil ecology risk simultaneously.While utilizing microorganism to carry out contaminated soil remediation, adding cellulose and charcoal fixes pollutant and strengthens indigenous microorganism renovation of organic pollution thing soil in soil, is important topic in current research.The mechanism of phytoremediation polycyclic aromatic hydrocarbon mainly contains: directly absorb and accumulation; Promote the degradation of rhizosphere indigenous microorganism.
Many difficult problems such as large for soil luxuriant and rich with fragrance pollution plot difficulty, cost is high, method is few, seek that a kind of cost is low, efficiency is high, suit measures to local conditions, the administering method of phenanthrene-polluted soil simple to operate, become key of the present invention.
Summary of the invention
The object of the present invention is to provide a kind of small-molecular-weight polycyclic aromatic hydrocarbon, the i.e. administering method of phenanthrene-polluted soil, the method has that cost is low, efficiency is high, suits measures to local conditions, simple to operate, secondary pollution can not be caused to environment, the advantage of utilization of resources can be realized.
Technical scheme of the present invention is as follows:
An administering method for phenanthrene-polluted soil, be by adsorbent with the mass ratio of 15-20% join more than 20cm by luxuriant and rich with fragrance contaminated soil top layer, mixing of turning over;
Described, luxuriant and rich with fragrance adsorbent is prepared by following steps:
1) dried and simple crushing by wheat-straw, obtain charcoal in Muffle furnace at 300-350 DEG C after pyrolysis 5-8 hour, cross 100 mesh sieve, by washed with de-ionized water, 60-70 DEG C in baking oven, dries 2-3 hour; 2) cross 100 mesh sieve by after straw and the fragmentation of wheat bran difference, mix as cellulose using the ratio of 4:1, autoclaving (121 DEG C, 20 minutes) is for subsequent use, for subsequent use after surfactant B rij30 autoclaving; 3) charcoal, cellulose and surfactant B rij30 press the quality of 2:2:1 than Homogeneous phase mixing, as luxuriant and rich with fragrance adsorbent; 4) luxuriant and rich with fragrance adsorbent with mixed with the mass ratio of 15-20% by luxuriant and rich with fragrance contaminated soil after, regulate moisture be maxmun field capacity 40% and fully mixing, lucifuge process at 25-30 DEG C.
Described, the concentration by luxuriant and rich with fragrance contaminated soil China and Philippines is 100-300mg/Kg.
Beneficial effect of the present invention: processing method of the present invention is nontoxic, and cost is low, can not cause secondary pollution to environment, and add charcoal and cellulose in soil after, can be used as a kind of excellent soil conditioner, improves the productivity of soil; Charcoal and cellulose are all prepared with agricultural wastes, and low in raw material price is conducive to environmental protection, meet the needs of recycling economy development, have good contaminated soil remediation application prospect.
Detailed description of the invention
According to following embodiment, the present invention may be better understood.
embodiment 1
A kind of administering method of phenanthrene-polluted soil, that charcoal, cellulose and surfactant B rij30 are joined more than 20cm's with the mass ratio of 2:2:1, concentration by luxuriant and rich with fragrance pollution is the upper soll layer of 100mg/Kg, the amount added is 1/8 of polluted soil total amount, turn over, obtaining luxuriant and rich with fragrance clearance through detection computations after 3 days is 89.86%.
Described, detecting step is: 4g pedotheque is placed in tool plug glass centrifuge tube, adds 30mL ethane and carrene (1:1), carries out ultrasonic, ultrasonic time 20 minutes, keeps water temperature at 20-30 DEG C, prevents solution from seething with excitement.Ultrasonic complete after carry out centrifugal 15 minutes of 2200rpm.Get supernatant, in triplicate.Concentrating with revolving steaming instrument, solution replacement being become acetonitrile, carries out liquid phase test.0.22 μm of filter membrane is crossed before test.Mobile phase is acetonitrile-water (95/5), and chromatographic column is: the XDB-C18 post of 4.6 × 150mm, column temperature 25 DEG C, flow velocity 1mLmin-1, wavelength 254nm.
embodiment 2
A kind of administering method of phenanthrene-polluted soil, charcoal, cellulose and surfactant B rij30 are joined more than 20cm's with the mass ratio of 2:2:1, concentration by luxuriant and rich with fragrance pollution is the upper soll layer of 100mg/Kg, the amount added is 1/8 of polluted soil total amount, turn over, obtaining luxuriant and rich with fragrance clearance through detection computations after 7 days is 98.41%.
Described, detecting step is: 4g pedotheque is placed in tool plug glass centrifuge tube, adds 30mL ethane and carrene (1:1), carries out ultrasonic, ultrasonic time 20 minutes, keeps water temperature at 20-30 DEG C, prevents solution from seething with excitement.Ultrasonic complete after carry out centrifugal 15 minutes of 2200rpm.Get supernatant, in triplicate.Concentrating with revolving steaming instrument, solution replacement being become acetonitrile, carries out liquid phase test.0.22 μm of filter membrane is crossed before test.Mobile phase is acetonitrile-water (95/5), and chromatographic column is: the XDB-C18 post of 4.6 × 150mm, column temperature 25 DEG C, flow velocity 1mLmin-1, wavelength 254nm.
embodiment 3
A kind of administering method of phenanthrene-polluted soil, charcoal, cellulose and surfactant B rij30 are joined more than 20cm's with the mass ratio of 2:2:1, concentration by luxuriant and rich with fragrance pollution is the upper soll layer of 300mg/Kg, the amount added is 1/8 of polluted soil total amount, turn over, obtaining luxuriant and rich with fragrance clearance through detection computations after 3 days is 85.03%.
Described, detecting step is: 4g pedotheque is placed in tool plug glass centrifuge tube, adds 30mL ethane and carrene (1:1), carries out ultrasonic, ultrasonic time 20 minutes, keeps water temperature at 20-30 DEG C, prevents solution from seething with excitement.Ultrasonic complete after carry out centrifugal 15 minutes of 2200rpm.Get supernatant, in triplicate.Concentrating with revolving steaming instrument, solution replacement being become acetonitrile, carries out liquid phase test.0.22 μm of filter membrane is crossed before test.Mobile phase is acetonitrile-water (95/5), and chromatographic column is: the XDB-C18 post of 4.6 × 150mm, column temperature 25 DEG C, flow velocity 1mLmin-1, wavelength 254nm.
embodiment 4
A kind of administering method of phenanthrene-polluted soil, charcoal, cellulose and surfactant B rij30 are joined more than 20cm's with the mass ratio of 2:2:1, concentration by luxuriant and rich with fragrance pollution is the upper soll layer of 300mg/Kg, the amount added is 1/8 of polluted soil total amount, turn over, obtaining luxuriant and rich with fragrance clearance through detection computations after 7 days is 97.98%.
Described, detecting step is: 4g pedotheque is placed in tool plug glass centrifuge tube, adds 30mL ethane and carrene (1:1), carries out ultrasonic, ultrasonic time 20 minutes, keeps water temperature at 20-30 DEG C, prevents solution from seething with excitement.Ultrasonic complete after carry out centrifugal 15 minutes of 2200rpm.Get supernatant, in triplicate.Concentrating with revolving steaming instrument, solution replacement being become acetonitrile, carries out liquid phase test.0.22 μm of filter membrane is crossed before test.Mobile phase is acetonitrile-water (95/5), and chromatographic column is: the XDB-C18 post of 4.6 × 150mm, column temperature 25 DEG C, flow velocity 1mLmin-1, wavelength 254nm.
Claims (6)
1. an administering method for phenanthrene-polluted soil, is characterized in that, by luxuriant and rich with fragrance adsorbent with the mass ratio of 15-20% join more than 20cm by luxuriant and rich with fragrance contaminated soil top layer, mixing of turning over.
2. adsorbent according to claim 1 is prepared by following steps:
1) dried and simple crushing by wheat-straw, obtained charcoal after pyrolysis 5-8 hour at 300-350 DEG C, cross 100 mesh sieve, with washed with de-ionized water, oven dry, temperature is 60-70 DEG C, and the time is 2-3 hour;
2) wheat-straw and wheat bran are pulverized rear mistake 100 mesh sieve respectively, mix as cellulose using the ratio of 4:1, autoclaving (121 DEG C, 20 minutes) is for subsequent use; For subsequent use after surfactant B rij30 autoclaving;
3) charcoal, cellulose and surfactant press the quality of 2:2:1 than Homogeneous phase mixing, as luxuriant and rich with fragrance adsorbent;
4) luxuriant and rich with fragrance adsorbent with mixed with the mass ratio of 15-20% by luxuriant and rich with fragrance contaminated soil after, regulate moisture be maxmun field capacity 40% and fully mixing, lucifuge process at 25-30 DEG C.
3. administering method according to claim 1, is characterized in that, the described concentration by luxuriant and rich with fragrance contaminated soil China and Philippines is 100-300mg/Kg.
4. absorbent preparation step according to claim 2, is characterized in that, described cellulose is that after wheat-straw and wheat bran mix with the ratio of 4:1, autoclaving obtains.
5. luxuriant and rich with fragrance adsorbent according to claim 2, is characterized in that, described luxuriant and rich with fragrance adsorbent is that charcoal, cellulose and surfactant B rij30 are more obtained than Homogeneous phase mixing by the quality of 2:2:1.
6. processing mode according to claim 2, is characterized in that, described adsorbent mixes with the mass ratio of 15-20% with polluted soil, lucifuge process at 25-30 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109365498A (en) * | 2018-12-20 | 2019-02-22 | 北京市环境保护科学研究院 | A kind of formula and soil treatment device reducing P in soil AHs biological effectiveness |
| CN109365495A (en) * | 2018-12-05 | 2019-02-22 | 辽宁石油化工大学 | The method of charcoal carrier surface activating agent coupling antimicrobial plant remedying oil-polluted soils |
| CN115213215A (en) * | 2022-06-21 | 2022-10-21 | 北京师范大学 | Remediation agent for remediating polycyclic aromatic hydrocarbon contaminated soil and preparation method thereof |
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| CN109365495A (en) * | 2018-12-05 | 2019-02-22 | 辽宁石油化工大学 | The method of charcoal carrier surface activating agent coupling antimicrobial plant remedying oil-polluted soils |
| CN109365498A (en) * | 2018-12-20 | 2019-02-22 | 北京市环境保护科学研究院 | A kind of formula and soil treatment device reducing P in soil AHs biological effectiveness |
| CN115213215A (en) * | 2022-06-21 | 2022-10-21 | 北京师范大学 | Remediation agent for remediating polycyclic aromatic hydrocarbon contaminated soil and preparation method thereof |
| CN115213215B (en) * | 2022-06-21 | 2023-05-26 | 北京师范大学 | Repairing agent for repairing polycyclic aromatic hydrocarbon polluted soil and preparation method thereof |
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