A kind of method adopting phytoremediation of heavily polycyclic aromatic hydrocarbons polluted soil
A technology of polycyclic aromatic hydrocarbons and phytoremediation, applied in the restoration of polluted soil, etc., can solve the problems that microorganisms are difficult to survive and implement, and achieve the effects of improved photosynthesis ability, low treatment cost and low cost
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Embodiment 1
[0013] In an abandoned coking plant, the concentration of polycyclic aromatic hydrocarbons in the soil is 0.2g / kg, and the pollution area is 100m 2 . Plant cocklebur seedlings with a height of about 10cm in the PAH-contaminated soil of the abandoned coking plant above, with a planting density of 100-200 plants / m 2 . At the same time, 10 L of sodium selenite solution with a concentration of 1.2 μmol / L was prepared and sprayed on the leaves of cocklebur seedlings once every 10 days for a total of 2 months. When cocklebur grows to the seed stage, the plants are removed and harmlessly treated, and this is repeated until the content of polycyclic aromatic hydrocarbons in the soil reaches the environmental safety standard.
Embodiment 2
[0015] In an abandoned coking plant, the concentration of polycyclic aromatic hydrocarbons in the soil is 0.2g / kg, and the pollution area is 100m 2 . Plant the seedlings with a height of about 5cm in the PAH-contaminated soil of the abandoned coking plant above, with a planting density of 100-200 plants / m 2 . At the same time, 10 L of sodium selenite solution with a concentration of 1.2 μmol / L was prepared, and sprayed on the leaves of the annual poncho seedlings, once every 10 days for a total of 2 months. When the annual pomegranate reaches the mature stage, the plants will be removed and harmlessly treated, and this will be repeated until the content of polycyclic aromatic hydrocarbons in the soil reaches the environmental safety standard.
Embodiment 3
[0017] In an abandoned coking plant, the concentration of polycyclic aromatic hydrocarbons in the soil is 0.2g / kg, and the pollution area is 100m 2 . Plant the seedlings of ghost needles with a height of about 5cm in the PAH-contaminated soil of the above abandoned coking plant, and the planting density is 100-200 plants / m 2 . At the same time, 10 L of sodium selenite solution with a concentration of 1.2 μmol / L was prepared, and the foliage spraying was carried out on the seedlings of P. japonica, once every 10 days for a total of 2 months. When the ghost needle grass reaches the mature stage, the plants are removed and treated harmlessly, and this is repeated until the content of polycyclic aromatic hydrocarbons in the soil reaches the environmental safety standard.
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