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Method for restoring polycyclic aromatic hydrocarbon contaminated soil

A technology for polycyclic aromatic hydrocarbons and polluted soil, which is applied in the field of remediation of polycyclic aromatic hydrocarbons polluted soil, can solve the problems of increasing the absorption and degradation of polycyclic aromatic hydrocarbons, low efficiency of polycyclic aromatic hydrocarbons polluted soil, etc. Difficult, targeted effects

Inactive Publication Date: 2018-07-17
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to solve the problem of low efficiency of phytoremediation of PAH-contaminated soil, provide a method for remediation of PAH-contaminated soil with simple operation, low investment, and high efficiency. Plant varieties that super-absorb PAHs, and apply soil fertilizers and soil improvers to effectively increase the absorption and degradation of PAHs by plants, and realize the restoration and treatment of PAH-contaminated soil through plant harvesting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In order to solve the problem of low efficiency of phytoremediation of PAH-contaminated soil, a PAH-contaminated soil remediation method with simple operation, low investment and high efficiency is provided. The technical solution adopted by the present invention to solve the technical problem is implemented according to the following steps of:

[0023] ① Clean up the PAH-contaminated soil to be repaired, and clean up the crop straw, fallen leaves, bricks and stones and other sundries on the soil.

[0024] ②Spread soil fertilizer and soil conditioner on the cleaned soil.

[0025] ③ Plow the PAH-contaminated soil to be repaired, with a depth of 0.5 meters, and bury the soil fertilizer and soil conditioner in the soil.

[0026] ④ Interplant nightshade nightshade and different kinds of oil sunflower on the plowed soil.

[0027] ⑤Experimental analysis to determine the initial content of PAHs in the soil, the content of PAHs in the soil at different periods of oil sunflowe...

Embodiment 2

[0036] ① Clean up the PAH-contaminated soil to be repaired, and clean up the crop straw, fallen leaves, bricks and stones and other sundries on the soil.

[0037] ②Spread soil fertilizer and soil conditioner on the cleaned soil.

[0038] ③ Plow the PAH-contaminated soil to be repaired, the plowing depth is 0.8 meters, and bury the soil fertilizer and soil conditioner in the soil.

[0039] ④ Interplant nightshade nightshade and different kinds of oil sunflower on the plowed soil.

[0040] ⑤Experimental analysis to determine the initial content of PAHs in the soil, the content of PAHs in the soil at different periods of oil sunflower growth, and calculate the degradation rate of PAHs at different periods of oil sunflower growth. According to the order of the degradation rate of PAHs from large to small, the oil sunflower variety with the highest degradation rate of PAHs in the soil was screened out, and the oil sunflower species with the highest degradation rate screened out wa...

Embodiment 3

[0049] ① Clean up the PAH-contaminated soil to be repaired, and clean up the crop straw, fallen leaves, bricks and stones and other sundries on the soil.

[0050] ②Spread soil fertilizer and soil conditioner on the cleaned soil.

[0051] ③ Plow the PAH-contaminated soil to be repaired, with a depth of 1.2 meters, and bury the soil fertilizer and soil conditioner in the soil.

[0052] ④ Interplant nightshade nightshade and different kinds of oil sunflower on the plowed soil.

[0053] ⑤Experimental analysis to determine the initial content of PAHs in the soil, the content of PAHs in the soil at different periods of oil sunflower growth, and calculate the degradation rate of PAHs at different periods of oil sunflower growth. According to the order of the degradation rate of PAHs from large to small, the oil sunflower variety with the highest degradation rate of PAHs in the soil was screened out, and the oil sunflower species with the highest degradation rate screened out was pla...

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Abstract

The invention discloses a method for restoring polycyclic aromatic hydrocarbon contaminated soil. The method comprises the steps that the polycyclic aromatic hydrocarbon contaminated soil to be restored is treated, and sundries on the soil are cleared; a soil fertility intensifier and a soil conditioner are distributed on the cleaned soil; the polycyclic aromatic hydrocarbon contaminated soil to be restored is ploughed, and black nightshade and different types of oil sunflowers are interplanted on the ploughed soil; and the oil sunflower variety with the largest degradation rate for polycyclicaromatic hydrocarbon in the soil is screened out, and after the nightshade and the oil sunflowers are mature, all the plants are reaped. According to the method, the polycyclic aromatic hydrocarbon contaminated soil is restored by harvesting the plants, and meanwhile, the problems of processing and disposing of crop straws are partially solved.

Description

technical field [0001] The invention relates to the technical field of soil treatment, in particular to a method for repairing polycyclic aromatic hydrocarbon-contaminated soil. Background technique [0002] In the suburbs of many industrial cities in my country, a large amount of untreated sewage is used to directly irrigate farmland, which has caused the soil in sewage irrigation areas to suffer varying degrees of polycyclic aromatic hydrocarbon pollution. Polycyclic aromatic hydrocarbons have the "three causes" of teratogenicity, carcinogenicity and mutagenicity. They can enter the human body and the environment through many channels, posing a serious threat to human health and environmental safety. Due to their poor water solubility, polycyclic aromatic hydrocarbons are often adsorbed by soil particles, thereby endangering soil ecosystems. [0003] At present, the remediation technologies of PAH-contaminated soil mainly include chemical remediation, physical remediation...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 温馨万玉山沈梦韩惠
Owner CHANGZHOU UNIV
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