Method for restoring petroleum-polluted soil by utilization of wild ornamental plant Hylotelephium spectabile

Abstract

The invention relates to a method for restoring petroleum-polluted soil by the utilization of a wild ornamental plant Hylotelephium spectabile. By absorption effect of the plant itself and petroleum hydrocarbon degradation of rhizosphere microorganisms and root exudates, petroleum hydrocarbon in soil is degraded. The method provided by the invention comprises the following steps: by a rhizome cutting or seedling transplant method, Hylotelephium spectabile is planted in soil polluted by petroleum hydrocarbon with the concentration of no more than 4% and is managed; when the plant grows to the maturation stage or flowering stage, the whole plant can be moved away to be sold as an ornamental flower, namely a commodity; and the above step of planting Hylotelephium spectabile in the soil is repeated until the content of petroleum hydrocarbon in the soil reaches the national environment standard or ecological safety index. The method has advantages as follows: by the utilization of Hylotelephium spectabile in restoration of the soil polluted by petroleum hydrocarbon, cost is low; secondary pollution is not generated; pollution dose not enter the food chain; physical and chemical properties of soil are not damaged; pollution is treated and the environment is beautified; and the method is suitable for large-area operation, has small work amount, has an extensive pattern for management of wild flowers, is fast in effectiveness and is good for popularization and application.

Description

technical field [0001] The invention relates to an environment restoration technology of organic polluted soil, in particular to a method for repairing oil-polluted soil by using wild ornamental plants and eight treasures. Background technique [0002] At present, soil pollution is one of the most serious environmental pollution problems recognized in the world, and petroleum hydrocarbons are an important source of soil pollution. Petroleum hydrocarbons are chemical substances produced due to various applications of petroleum, including alkanes (linear alkanes, branched alkanes and cycloalkanes), aromatic hydrocarbons, asphaltenes, polar substances, etc., see Document 1:ZHOU Qixing, CAI Zhang, ZHANG Zhineng and LIU Weitao. Ecological Remediation of Hydrocarbon Contaminated Soils with Weed Plant. Journal of Resources and Ecology, 2011, 2(2):97-105. Oil spills and leaks that occur during oil extraction, refining, storage and transportation will inevitably produce crude oil th...

AI Technical Summary

Problems solved by technology

[0005] Seeking plants that can efficiently degrade petroleum hydrocarbons is a prerequisite for petroleum hydrocarbon-contaminated soil remediation. However, so far, there are relatively few researches in this field at home and abroad, and there are even fewer plants with independent intellectual property rights for remediating petroleum pollution.

In addition, the reported species of plants for repairing petroleum hydrocarbon-contaminated soils are very limited, and there are no systematic reports on wild ornamental plants in this regard.

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