Method for remediating petroleum contaminated wet land by combining Phragmites australis and microorganisms

Abstract

The invention relates to a method for remediating a petroleum contaminated wet land by combining Phragmites australis and microorganisms, which comprises the following steps: planting Phragmites australis in soil on a petroleum contaminated wet land, adding bacterial suspension of Eosinophilic oil bacteria into soil after the Phragmites australis adapt to the soil, and removing the petroleum contaminants from the soil under the coordinated action of the Eosinophilic oil bacteria and the roots of the plants, wherein the planting density of the Phragmites australis is controlled to be 160 to 400 plants per square meter; and the volume-mass ratio of the bacterial suspension to the soil is (1-5):100ml/g. In the invention, the screened degrading bacterial colonies can strengthen the oil contaminant degradation capacity of the roots of the Phragmites australis. The method has the advantages that: the damage to the environment is small; in-situ remediation can be performed; treatment sites are not required; physical and chemical properties of the soil are not affected; the cost is low, and large-scale operation can be performed; while contamination is treated, soil is fixed, bands are fixed and water and soil loss are prevented; and the like.

Description

technical field [0001] The present invention relates to the plant-microorganism joint restoration technology of the wetland polluted by petroleum, specifically a kind of using the gramineous plant Phragmites reed ( Phragmites australis ) combined with oleophilic flora to restore wetlands polluted by petroleum organics. Background technique [0002] In the process of large-scale oil extraction, smelting, transportation, use and processing, accidents such as pollution, omission, blowout, and oil pipeline leakage occur frequently, resulting in serious soil pollution. The area of ​​soil and water bodies polluted by oil in our country is also expanding, and the degree of pollution is becoming more and more serious. The risk of sudden pollution leakage accidents from ships is relatively high, and oil spills occur from time to time, causing the wetland ecosystems near the coast and some lakes to be polluted to a certain extent. Oil pollution to the soil is mainly concentrated in ...

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Problems solved by technology

In recent years, there have been many researches on the degradation of petroleum pollutants in soil at home and

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