Method for repairing oil polluted wetland by combining arrowhead and oilphilic microorganisms

Abstract

The invention relates to a method for repairing an oil polluted wetland by combining arrowhead and oilphilic microorganisms. In the method, arrowhead and special flora are adopted to treat oil polluted soil. The method concretely comprises the following steps of: transplanting arrowhead in the time of young seedling into the oil polluted wetland, after the arrowhead adapts to the soil, adding an oilphilic bacterium suspension into the soil, and removing oil contamination in the soil under the synergistic effect of the oilphilic bacterium and a plant root system. Compared with the traditional soil management method, the method provided by the invention has the advantages of less investment, convenience in operation, less work amount, low technical requirement and no secondary pollution. The repairing process not only can not destroy soil environment but also is beneficial to improving soil degradation and productivity reduction which are caused by petroleum hydrocarbon pollution and recovering and improving biodiversity of soil. Besides, the arrowhead has better ornamental value and economic value. The method has economic value and ornamental value, is used for degradation and removal on wetland petroleum pollutants and has the characteristics of low environmental risk, low cost, high feasibility and the like.

Description

technical field [0001] The invention relates to a restoration method for oily wetlands, in particular to a restoration method utilizing the plant Carnation ( Sagittaria sagittifolia L. ) combined with oleophilic flora to remediate oily wetlands. Background technique [0002] After petroleum pollutants are discharged into the soil environment, they can destroy the soil structure, block the soil pores, affect the permeability of the soil, change the composition and structure of soil organic matter, and reduce the soil quality. The residue and accumulation of petroleum substances in the soil are strong, which can significantly affect the material and energy exchange between the soil and the external environment; in the process of permeating underground, the petroleum also diffuses along the surface and erodes the soil layer, making it salinized and alkaline. Asphaltization, compaction, and migration along the deep soil under the action of gravity. Due to the high viscosity and...

AI Technical Summary

Problems solved by technology

In recent years, there have been reports at home and abroad on the treatment of oily sewage by oleophilic bacteria, but there has been no report on the microbial treatment method with high degradation rate for high-concentration diesel sewage; and the treatment of wetland environment polluted by high-concentration oil degradation by using plants and efficient microorganisms method has not been reported

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