CN105478461A - Method for repairing soil seriously polluted by polycyclic aromatic hydrocarbon by utilizing plants - Google Patents
Method for repairing soil seriously polluted by polycyclic aromatic hydrocarbon by utilizing plants Download PDFInfo
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- CN105478461A CN105478461A CN201610020606.0A CN201610020606A CN105478461A CN 105478461 A CN105478461 A CN 105478461A CN 201610020606 A CN201610020606 A CN 201610020606A CN 105478461 A CN105478461 A CN 105478461A
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- polycyclic aromatic
- soil
- aromatic hydrocarbon
- plant
- aromatic hydrocarbons
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention relates to a method for repairing soil seriously polluted by polycyclic aromatic hydrocarbon by utilizing plants. The method comprises the specific steps that plant seedlings are planted on the soil polluted by high-concentration polycyclic aromatic hydrocarbon, leaf surface spraying is carried out on the plant seedlings with sodium selenite solution with a certain concentration every 10 days to 15 days, and spraying lasts for 2-3 months; and when the plants grow to be mature, the plants are pulled out, innocent treatment is carried out, and the processes are repeatedly executed till the content of the soil polycyclic aromatic hydrocarbon reaches the safety environment standard. The pollution tolerance of the plants to the high-concentration polycyclic aromatic hydrocarbon in the soil can be improved, the plants are promoted to absorb polycyclic aromatic hydrocarbon, the repairing time is short, and the plant repairing effect is improved. Due to the fact that industrial sodium selenite is cheap, the cost for treating the soil polluted by the high-concentration polycyclic aromatic hydrocarbon is lower, and the higher actual application value is achieved.
Description
Technical field
The present invention relates to a kind of polycyclic aromatic hydrocarbons contaminated plant restoration method of severe executing selenium based on plant leaf blade, be specially and apply a certain amount of selenium at plant leaf surface, improve plant to the polycyclic aromatic hydrocarbons contaminated absorbability of soil high concentration.
Background technology
Polycyclic aromatic hydrocarbon (polycyclicaromatichydrocarbons, PAHs) is the volatile hydrocarbon that coal, oil, timber, tobacco and organic high molecular compound imperfect combustion produce, and is the important dirty pollutant of environment.Polycyclic aromatic hydrocarbon is widely distributed in the environment, having very large potential hazard polycyclic aromatic hydrocarbon to human health and ecological environment is prevalent in the varying environment such as soil, deposit matrix, there is teratogenesis, carcinogenic, mutagenic three and cause effect and bio-refractory, along with the mankind are to the progressively intensification of environmental awareness, the reparation problem of polycyclic aromatic hydrocarbon becomes the problem of global concern.More than 90% polycyclic aromatic hydrocarbon be discharged in air will enter soil by atmospheric sedimentation approach, make soil become the major storage storehouse of PAHs in environment.Therefore, method is fast and effectively needed to repair polycyclic aromatic hydrocarbon pollution.What polycyclic aromatic hydrocarbon was a large amount of is present in discarded artificial coal gas production field, and mainly produced by coke and coal tar, artificial coal gas production field is by Coal Pyrolysis or Petroleum Production coal gas, and these two processes all produce polycyclic aromatic hydrocarbon.Although artificial coal gas production field is own through going out of use, the pollution of polycyclic aromatic hydrocarbon is not also solved.Oil is in industrial production, transport process urban waste as junked tire in addition, and the organic combusting Municipal such as plastics heating boiler, the discharge of insufficient vehicle exhaust of little cooking stove burning can both cause the pollution of polycyclic aromatic hydrocarbon.Coke-oven plant's contaminated soil of site pollution history is longer, the high and complicated component of polycyclic aromatic hydrocarbon total amount, and polycyclic aromatic hydrocarbon with high molecular weight content is high, and is locked in soil particle inside configuration due to aging action, and it is large to repair difficulty.
Administering method at present for polycyclic aromatic hydrocarbon pollution mainly contains three major types: Physical, chemical method and biological restoration.Wherein biological prosthetic because its processing cost is low, non-secondary pollution, can the advantage such as treatment in situ, public's acceptance level be high and effective, there is boundless development potentiality and application prospect.Biological prosthetic type mainly comprises microorganism remediation, phytoremediation and microorganism-plant combined reparation, wherein and microorganism-plant combined reparation be contaminated soil bioremediation technology research new development, have the advantage of microorganism remediation and phytoremediation concurrently.But when PAHs in soil excessive concentration, Soil Microorganism is difficult to survival, and the growth of large portion plant also can be suppressed, and existing biological renovation method is difficult to carry out.Therefore, up to the present, the reparation of high concentration polycyclic aromatic hydrocarbon pollution remains of an environmental science difficult problem urgently to be resolved hurrily.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of polycyclic aromatic hydrocarbons contaminated plant restoration method of severe executing selenium based on plant leaf blade, the herbaceous plant of, well developed root system comparatively strong in high concentration polycyclic aromatic hydrocarbon pollution plantation field survivorship ability, as Siberian cocklebur, annual fleabane herb, beggar-ticks, clover, Alternanthera philoxeroides etc., and sodium selenite solution sprinkling is carried out to plant leaf blade, improve plant to the tolerance of soil high concentration polycyclic aromatic hydrocarbon.
The technical solution adopted in the present invention is: one is executed selenium based on plant leaf blade and repaired high concentration polycyclic aromatic hydrocarbon soil pollution method.
Said method specifically comprises the following steps:
At the grown on soil plant seedlings that high concentration is polycyclic aromatic hydrocarbons contaminated, with certain density sodium selenite solution, every 10-15 days, foliage spray is carried out to plant seedlings again, continue 2-3 month, when plant grows to the maturity period, plant is pulled out and carries out harmless treatment, so repeatedly until soil polycyclic aromatic hydrocarbon content reaches environmental safety standard.
The polycyclic aromatic hydrocarbons contaminated soil of high concentration comprises the soil of coke-oven plant, manufactured gas factory, coal tar factory, and soil polycyclic aromatic hydrocarbon concentration reaches 0.2-2.5g/kg.Planting density is 50-200 strain/m
2.1.2-1.8 μm of ol/L of sodium selenite solution.
So repeatedly reach environmental safety standard to soil polycyclic aromatic hydrocarbon content;
Industry sodium selenite low price, lower with process high concentration polycyclic aromatic hydrocarbon pollution control expense of the present invention, actual application value is large.
The present invention is at the polycyclic aromatic hydrocarbons contaminated grown on soil plant seedlings of high concentration, with certain density sodium selenite solution, every 10-15 days, foliage spray is carried out to plant seedlings again, continue 2-3 month, when plant grows to the maturity period, plant is pulled out and carries out harmless treatment, so repeatedly until soil polycyclic aromatic hydrocarbon content reaches environmental safety standard.As benzo (a) pyrene content is less than 0.10mg/kg, namely reach environmental safety standard.The present invention can improve plant to the polycyclic aromatic hydrocarbons contaminated tolerance of soil middle and high concentration, and promotes that plant absorbs polycyclic aromatic hydrocarbon, and repair time is short, improves effect of plant restoration.Due to industrial sodium selenite low price, administer high concentration polycyclic aromatic hydrocarbon pollution expense with the present invention lower, have higher actual application value.Previous experiments finds, plant grows and is subject to obvious suppression in high concentration petroleum hydrocarbon soil, and add low dosage sodium selenite in soil after, detect and find that plant leaf blade photosynthetic capacity improves, root system decomposing petroleum hydrocarbon ability obviously strengthens, and therefore the invention has the beneficial effects as follows in soil that adding low dosage selenium can improve the repairing effect of plant to high concentration petroleum hydrocarbon.
Detailed description of the invention
Embodiment one
Certain discarded coke-oven plant, the concentration of PAHs in soil is 0.2g/kg, and contaminated area is 100m
2.To highly be about 10cm Siberian cocklebur seedling kind in above discarded coke-oven plant's polycyclic aromatic hydrocarbon pollution, planting density is 100-200 strain/m
2.Compound concentration is the sodium selenite solution 10L of 1.2 μm of ol/L simultaneously, carries out foliage spray, every 10 days 1 time, 2 totally months to Siberian cocklebur seedling.When Siberian cocklebur grows to seed stage, plant is carried out dial and remove, and carry out harmless treatment, so repeatedly reach environmental safety standard to soil polycyclic aromatic hydrocarbon content.
Embodiment two
Certain discarded coke-oven plant, the concentration of PAHs in soil is 0.2g/kg, and contaminated area is 100m
2.To highly be about 5cm annual fleabane herb seedling kind in above discarded coke-oven plant's polycyclic aromatic hydrocarbon pollution, planting density is 100-200 strain/m
2.Compound concentration is the sodium selenite solution 10L of 1.2 μm of ol/L simultaneously, carries out foliage spray, every 10 days 1 time, 2 totally months to annual fleabane herb seedling.When annual fleabane herb is to the maturity period, plant is carried out dial and remove, and carry out harmless treatment, so repeatedly reach environmental safety standard to soil polycyclic aromatic hydrocarbon content.
Embodiment three
Certain discarded coke-oven plant, the concentration of PAHs in soil is 0.2g/kg, and contaminated area is 100m
2.To highly be about 5cm beggar-ticks seedling kind in above discarded coke-oven plant's polycyclic aromatic hydrocarbon pollution, planting density is 100-200 strain/m
2.Compound concentration is the sodium selenite solution 10L of 1.2 μm of ol/L simultaneously, carries out foliage spray, every 10 days 1 time, 2 totally months to beggar-ticks seedling.When beggar-ticks is to the maturity period, plant is carried out dial and remove, and carry out harmless treatment, so repeatedly reach environmental safety standard to soil polycyclic aromatic hydrocarbon content.
Embodiment four
Certain discarded manufactured gas factory, the concentration of PAHs in soil reaches 2.5g/kg, and contaminated area is 200m
2.To highly be about 10cm clover seedling kind in above discarded coke-oven plant's polycyclic aromatic hydrocarbon pollution, planting density is 100-200 strain/m
2.Compound concentration is the sodium selenite solution 10L of 1.8 μm of ol/L simultaneously, carries out foliage spray, 1 time weekly, 2 totally months to clover seedling.When clover grows to seed stage, carried out by this clover dialling and remove, and carry out harmless treatment, clover vitality is strong, and annual spring and autumn can respectively plant once, so repeatedly reaches environmental safety standard to soil polycyclic aromatic hydrocarbon content.
Embodiment five
Certain discarded manufactured gas factory, the concentration of PAHs in soil reaches 2.5g/kg, and contaminated area is 200m
2.To highly be about 10cm Alternanthera philoxeroides seedling kind in above discarded coke-oven plant's polycyclic aromatic hydrocarbon pollution, planting density is 100-200 strain/m
2.Compound concentration is the sodium selenite solution 10L of 1.8 μm of ol/L simultaneously, carries out foliage spray, 1 time weekly, 2 totally months to Alternanthera philoxeroides seedling.When Alternanthera philoxeroides grows to seed stage, carried out by this Alternanthera philoxeroides dialling and remove, and carry out harmless treatment, Alternanthera philoxeroides vitality is strong, and annual spring and autumn can respectively plant once, so repeatedly reaches environmental safety standard to soil polycyclic aromatic hydrocarbon content.
Claims (5)
1. the method for the soil adopting phytoremediation severe polycyclic aromatic hydrocarbons contaminated, it is characterized in that, at the grown on soil plant seedlings that high concentration is polycyclic aromatic hydrocarbons contaminated, with certain density sodium selenite solution, every 10-15 days, foliage spray is carried out to plant seedlings again, continue 2-3 month, when plant grows to the maturity period, plant is pulled out and carries out harmless treatment, so repeatedly until soil polycyclic aromatic hydrocarbon content reaches environmental safety standard.
2. the method for the soil that employing phytoremediation severe according to claim 1 is polycyclic aromatic hydrocarbons contaminated, it is characterized in that, the polycyclic aromatic hydrocarbons contaminated soil of high concentration comprises the soil of coke-oven plant, manufactured gas factory, coal tar factory, and soil polycyclic aromatic hydrocarbon concentration reaches 0.2-2.5g/kg.
3. the method for the soil that employing phytoremediation severe according to claim 1 is polycyclic aromatic hydrocarbons contaminated, is characterized in that, planting density is 50-200 strain/m
2.
4. the method for the soil that employing phytoremediation severe according to claim 1 is polycyclic aromatic hydrocarbons contaminated, is characterized in that, 1.2-1.8 μm of ol/L of sodium selenite solution.
5. the method for the soil that employing phytoremediation severe according to claim 1 is polycyclic aromatic hydrocarbons contaminated, is characterized in that, described plant comprise in Siberian cocklebur, annual fleabane herb, terrible leaf grass, clover, happiness yerbadetajo seed any one.
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Cited By (4)
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| CN108271452A (en) * | 2017-12-15 | 2018-07-13 | 安徽金阳光农业服务有限公司 | One kind being rich in heavy metal tailing phytoremediation |
| CN109365521A (en) * | 2018-12-04 | 2019-02-22 | 三峡大学 | Soil silicate fortification of plants repairs polycyclic aromatic hydrocarbons contaminated method |
| CN109926439A (en) * | 2018-08-08 | 2019-06-25 | 环境保护部华南环境科学研究所 | It is a kind of can simultaneously in fixing soil heavy metal and decomposing petroleum hydrocarbon method |
| CN110972832A (en) * | 2019-12-23 | 2020-04-10 | 中国环境科学研究院 | Preparation method for purifying coastal wetland polycyclic aromatic hydrocarbon pollution by suaeda salsa |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108271452A (en) * | 2017-12-15 | 2018-07-13 | 安徽金阳光农业服务有限公司 | One kind being rich in heavy metal tailing phytoremediation |
| CN109926439A (en) * | 2018-08-08 | 2019-06-25 | 环境保护部华南环境科学研究所 | It is a kind of can simultaneously in fixing soil heavy metal and decomposing petroleum hydrocarbon method |
| CN109365521A (en) * | 2018-12-04 | 2019-02-22 | 三峡大学 | Soil silicate fortification of plants repairs polycyclic aromatic hydrocarbons contaminated method |
| CN110972832A (en) * | 2019-12-23 | 2020-04-10 | 中国环境科学研究院 | Preparation method for purifying coastal wetland polycyclic aromatic hydrocarbon pollution by suaeda salsa |
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| CN105478461B (en) | 2018-06-19 |
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