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Process of botany for repairing soil composite polluted by polycyclic aromatic hydrocarbon

A technology of complex pollution and polycyclic aromatic hydrocarbons, applied in the restoration of contaminated soil, application, seed and rhizome treatment, etc.

Inactive Publication Date: 2006-06-28
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Is this root loop function conducive to promoting the degradation of various PAHs in soil? Usually it can be mowed several times a year, whether the above-ground parts can also directly take away organic pollutants, and other repair functions, little is known at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Soil for testing: collected from polycyclic aromatic hydrocarbon-contaminated soil somewhere in the Yangtze River Delta, air-dried naturally, passed through a 3mm sieve, and adjusted the soil water content to 55% of the field water capacity for testing. Before remediation, the polycyclic aromatic hydrocarbons phenanthrene (PA) and benzop[a]pyrene (B[a]P) in the tested soil were 50.5 μg / kg and 12.7 μg / kg, respectively.

[0018] Test plants: alfalfa (Medicago sativa L.), a leguminous perennial herb, is the most important cultivated grass in the world, known as the "king of grass".

[0019] Experimental scheme: Two treatments were designed in this study, namely control (treatment 1) and planting alfalfa (treatment 2). Repeat 4 times and arrange in random blocks.

[0020] Test method: Apply a certain amount of base fertilizer to polycyclic aromatic hydrocarbons (PAHs) compound polluted soil, and mix well. The treated alfalfa seeds were sown in pots in time, covered with s...

Embodiment 2

[0022] Embodiment 2 is basically the same as Embodiment 1, but after the plant used was changed to clover, the content of phenanthrene (PA) in the clover root, stem and leaf tissue is 26.4g kg -1 , 156.4 μg kg -1 , 162.1 μg kg -1 , while the content of benzo[a]pyrene (B[a]P) was 1.3μg kg -1 , 0.4 μg kg -1 , 0.5μg kg -1 , the degradation rates of phenanthrene (PA) and benzo[a]pyrene (B[a]P) in the tested soil ranged from 7.7% to 21.5%.

Embodiment 3

[0023] Embodiment 3 is basically the same as Example 1, but after the plant used was changed to sweet potato, the content of phenanthrene (PA) in the root, stem and leaf tissue of sweet potato was 12.7 μg kg -1 , 68.3 μg kg -1 , 54.4 μg kg -1 , while the content of benzo[a]pyrene (B[a]P) was 0.5μg kg -1 , 0.3μg kg -1 , 0.2 μg kg -1 , the degradation rates of phenanthrene (PA) and benzo[a]pyrene (B[a]P) in the tested soil ranged from 2.8% to 8.7%.

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PUM

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Abstract

A phytologic method for repairing the soil polluted by polycycloarylhydrocarbon features that the leguminous plant such as alfalfa, trifolium, etc is planted in said polluted soil and it is harvested after it is growing for 85-95 days.

Description

technical field [0001] The invention relates to a biological environmental protection technology, in particular to a method for reducing polycyclic aromatic hydrocarbon compound pollutants in soil: a botanical method for repairing polycyclic aromatic hydrocarbon compound polluted soil. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) widely exist in the environment, such as soil, sludge, water, oil and other media, it is a typical class of persistent organic pollutants, with high carcinogenic, teratogenic, mutagenic , pose a greater threat to ecological environment security and human health. Therefore, the control and remediation of persistent organic pollutants such as polycyclic aromatic hydrocarbons in soil has become an important research content in the field of environmental science and technology at home and abroad. Remediation methods for contaminated soil mainly include chemical, physical, microbial and phytorem...

Claims

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Application Information

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IPC IPC(8): B09C1/00A01C1/00B09C1/10
Inventor 滕应骆永明李振高
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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