Method for restoring petroleum hydrocarbon polluted soil through wild ornamental plant day lilies

Abstract

Provided is a method for restoring petroleum hydrocarbon polluted soil through wild ornamental plant day lilies. By means of the absorbing, transferring and metabolism effects of plants on soil petroleum hydrocarbon and the conversion and metabolism effects of root microorganisms, the purpose of removing petroleum hydrocarbon in soil is achieved. The method includes the specific steps that by means of a transferring method, day lilies are planted in the petroleum hydrocarbon polluted soil with the concentration lower than 4% and manually managed, and when the day lilies grow into the mature stage or the flowering stage, the whole day lilies can be moved away and serve as ornamental flowers to be sold; the day lilies are planted in the polluted soil by repeating the steps till the petroleum hydrocarbon content in the soil reaches national environment standards or ecological safety indexes. The method has the advantages that endurance of the wild ornamental plants on the outside environment is high; the surrounding environment can be beautified while petroleum hydrocarbon in soil can be removed; meanwhile it can be avoided that some pollutants enter a food chain as much as possible, and harm to human beings is reduced; besides, secondary pollution is avoided, and the public acceptance degree is high.

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 the wild ornamental plant Hemerocallis. Background technique [0002] Petroleum hydrocarbons (total petroleum hydrocarbons, TPHs) is one of the most important fossil fuels in the world, and has also become one of the world's public hazards. According to statistics, oil pollution alone has 8 million tons entering the environment every year in the world, and oil pollution of soil and groundwater has become a worldwide environmental problem. See literature 1): Cheng Guoling, Li Peijun, Wang Fengyou, etc. PAH pollution Research progress of soil phytoremediation and microbial remediation [J]. Environmental Pollution Control Technology and Equipment, 2003,4(6):30-36. In the past 30 years, the exploration, exploitation and refining activities of the petroleum industry have surged rapidly with the advancem...

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Problems solved by technology

However, at present, there are relatively few researches in this field at home and abroad, and there are fewer varieties of oil restoration plants with independent intellectual property rights.

In addition, the reported species of plants for repairing petroleum hydrocarbon-contaminated soils are very limited, and no systematic reports on wild ornamental plants have been seen so far.

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