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Method for remediating polycyclic aromatic hydrocarbons (PAHs) contaminated soil by utilizing flowering plant Echinacea purpurea

A polycyclic aromatic hydrocarbon and polluted soil technology, applied in the restoration of polluted soil and other directions, can solve the problems of high technical difficulty, large amount of engineering, secondary pollution, etc., and achieve the effect of high technical requirements, small engineering amount, and low investment.

Inactive Publication Date: 2012-07-11
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for repairing polycyclic aromatic hydrocarbon-contaminated soil by using the flower Echinacea purpurea to solve the problems of high technical difficulty, high cost, large engineering volume and easy secondary pollution in the prior art.

Method used

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  • Method for remediating polycyclic aromatic hydrocarbons (PAHs) contaminated soil by utilizing flowering plant Echinacea purpurea
  • Method for remediating polycyclic aromatic hydrocarbons (PAHs) contaminated soil by utilizing flowering plant Echinacea purpurea
  • Method for remediating polycyclic aromatic hydrocarbons (PAHs) contaminated soil by utilizing flowering plant Echinacea purpurea

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Embodiment Construction

[0023] The experimental site is located in the net room of the Shenyang Institute of Applied Ecology, Chinese Academy of Sciences. The potting experiment soil is the prepared PAH-contaminated soil, which is the original PAH-contaminated soil (0-20cm) collected from the Shengli Oilfield in Dongying City, Shandong Province and Shenyang City. The natural non-polluted soil (0-20cm) and sandy soil collected in Wanliutang Park were prepared into polycyclic aromatic hydrocarbon-contaminated soil with a PAHs concentration of 5000-9000 μg / kg through a weight ratio (1:1:1). The indicators are shown in Table 1. When Echinacea purpurea was planted in natural non-polluted soil for 15 days or when the plant height was 7-9 cm, the seedlings were transplanted into the prepared PAH-contaminated soil (the concentration of PAH was 8760 μg / kg). At the same time, a control group (namely, the prepared PAH-contaminated soil sample without planting plants) was set up in the experiment. The pots used...

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Abstract

The invention relates to the field of phytoremediation technology of polycyclic aromatic hydrocarbons (PAHs) contaminated soil, in particular to a method for managing and remediating PAHs contaminated soil by utilizing Echinacea purpurea. According to the invention, plants are planted in PAHs contaminated soil to ensure that in the process from growth to blossom or ripening of the plants, the PAHs in the soil is degraded and removed or obviously decreased through the growth process of the plants and the combined effect of enzyme and small-molecule organic acid secreted by root system and rhizosphere microbes, wherein the plants are the Echinacea purpurea belonging to compositae. Proved by experiments, the content of the PAHs in the soil is effectively degraded by utilizing the combined effect of the developed root system of the Echinacea purpurea and the rhizosphere microbes. By means of the method disclosed by the invention, problems of great technical difficulty, high cost, large work quantity, easiness in causing secondary contamination and the like in the prior art can be solved. The method has the advantages of strong operability, low cost, no damage to soil physical-chemical property, and can purify and beautify the environment at the same time.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of polycyclic aromatic hydrocarbons polluted soil, in particular to a method for treating and repairing polycyclic aromatic hydrocarbons (PAHs) polluted soil by using the flower Echinacea purpurea. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) are a class of extremely important typical pollutants in the soil environment, including naphthalene, anthracene, phenanthrene, pyrene, biphenyl, terphenyl, 1,2-diphenylethane and so on. Among the PAHs that have been discovered so far, more than 400 kinds have carcinogenic effects. Due to poor water solubility and high octanol-water partition coefficient, PAHs are often adsorbed on soil particles [Document 1: Liu Wuxing, Luo Yongming, Teng Ying, Li Zhengao, Wu Longhua, Ecological Risk Assessment and Bioremediation of Oil Contaminated Soil III. Petroleum Plant-microbial joint remediation of p...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 刘睿周启星魏树和
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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