Screening method of coastal wetland polycyclic aromatic hydrocarbon pollution purification and remediation plants

Abstract

The invention belongs to the field of environmental protection, and particularly relates to a screening method of coastal wetland polycyclic aromatic hydrocarbon pollution purification and remediationplants. The method is characterized by comprising the following steps: (1) performing field plant investigation: carrying out current distribution situation investigation on coastal wetland plants tobe remediated, and determining coastal wetland plants to be remediated through sample line and quadrat investigation; (2) screening local plants; (3) performing environmental simulation of differentpollution degrees of polycyclic aromatic hydrocarbon; (4) planting remediation plants; and (5) evaluating and screening the remediation plants. The screening method is comprehensive, systematic and efficient, and factors and contents influencing the evaluation and screening of the remediation plants are found.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a screening method for purifying and repairing plants polluted by polycyclic aromatic hydrocarbons in coastal wetlands. Background technique [0002] In recent years, with the massive exploitation and transportation of petroleum, about 8 million tons of petroleum pollutants flow into the natural ecological environment every year. The coastal waters are an important source and way of oil exploration and transportation. With the discharge of domestic sewage, industrial sewage and leakage of marine transportation, a large amount of persistent organic pollutants are imported into the ocean, causing serious pollution to coastal wetlands and further threatening human health. The concentration of polycyclic aromatic hydrocarbons in coastal sediments in my country is significantly higher than that of the United States and other Asian countries and regions, and lower t...

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Problems solved by technology

[0004] Although studies have shown that ideal plant species should have strong vitality, and their germination rate should be unaffected or less affected by pollutants, there is still a lack of effective plant screening methods for pollutant removal and restoration, especially The reason is that many plants are introduced blindly without combining the vegetation survey of the restoration site. Although the purpose of restoration can be achieved to a certain extent, there is also the risk of invasion caused by the spread of introduced species, such as the large-scale introduction of Spartina alterniflora in coastal wetlands. Therefore, in response to this problem, this discovery provides a set of plant screening techniques from field investigation, local plant screening to laboratory pollution-tolerant species screening

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