Method for repairing petroleum hydrocarbon contaminated soil by using wild ornamental plant-veronica polita

Abstract

The invention discloses a method for repairing petroleum hydrocarbon contaminated soil by using a wild ornamental plant-veronica polita. The method realizes degradation of petroleum hydrocarbon in soil by using absorption and degradation effects of plants and microorganisms in rhizosphere circles, and comprises the following detailed steps: a seeding, planting or soil cultivated seedling-young seedling transplanting method is adopted to respectively plant the veronica polita in the petroleum hydrocarbon contaminated soil; the maximum water holding capacity of the soil is measured; and the watering is performed once per day according to 60% of the maximum water holding capacity; when the veronica polita grows to a mature period or a flowering period, the veronica polita is totally shifted away; and the plantation of the veronica polita in the soil is repeated to continuously reduce the petroleum hydrocarbon pollution concentration in the soil until the content of petroleum hydrocarbon in the soil reaches the national environment standard or the ecological security index. The method has the advantages of low cost, low work amount, no secondary environment pollution and no damage of the soil structure, is an efficient, economical and green repair technology, and fully realizes unification of the ecological benefit, the environmental benefit and the economic benefit.

Description

technical field [0001] The invention relates to an environmental restoration technology for oil-polluted soil, in particular to a method for repairing oil-polluted soil by using the wild ornamental plant Popona. Background technique [0002] Soil is one of the most basic environmental elements for human survival, and it is also an important activity place for microorganisms, plants and animals. While soil provides a resource base for human agricultural production and urban development, it also has to carry various pollutants discharged by humans (Reference 1: Zhou Qixing. 2006. The latest progress in research on soil environmental pollution chemistry and chemical restoration. Environmental Chemistry, 03:257-265). According to statistics, in the past 40 years, at least billions of tons of harmful substances have been released into the soil around the world, and the industrial "three wastes" pollution of my country's farmland alone has exceeded 100 million mu (reference 2 Zho...

AI Technical Summary

Problems solved by technology

However, the research on the use of wild ornamental plants to remediate oil-contaminated soil is in its infancy, and the remediation of wild ornamental plants under saline-alkali stress has not been reported.

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