A Method for Remediating Polycyclic Aromatic Hydrocarbon Contaminated Soil Using Photocatalytic Electrospun Fiber Membrane

Abstract

The invention belongs to the technical field of soil remediation, and particularly relates to a method for remediating polycyclic aromatic hydrocarbon polluted soil by combining a photocatalysis technology and an electrospinning technology. The method particularly comprises the steps: preparing a spinning solution by using materials such as tetrabutyl titanate and bismuth nitrate, covering an electrospinning fibrous membrane with a photocatalysis activity the surface of polluted soil to be remediated by adopting a high-pressure electrospinning technology, driving polycyclic aromatic hydrocarbon to migrate to the surface of the photocatalysis electrospinning fibrous membrane by adopting the action of transpiration under the sunlight exposure, and performing photocatalytic degradation. The method has the advantages of overcoming the obstacles of the photocatalysis technology in the field of soil remediation, realizing that solar energy is fully utilized, effectively protecting a soil structure and a fertility system, blocking natural rainfall and polycyclic aromatic hydrocarbon volatilization, inhibiting 'grasshopper effect' of the polycyclic aromatic hydrocarbon, and playing a role of radically reforming soil.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and specifically relates to a method for remediating soil polluted by polycyclic aromatic hydrocarbons by combining environmentally friendly photocatalysis technology and electrospinning fiber technology. Background technique [0002] As typical toxic organic pollutants in soil, polycyclic aromatic hydrocarbons have a wide range of natural and man-made sources (Li et al., 2006; Motelay-Massei et al., 2005). Due to the poor water solubility of polycyclic aromatic hydrocarbons, they are often adsorbed on soil particles. It has become a storage and transfer station for polycyclic aromatic hydrocarbons in the environment. Due to atmospheric deposition (coal combustion and vehicle exhaust emissions), sewage irrigation, solid waste landfill leakage, oil field mining, etc., the soil in many parts of my country and the world is threatened by polycyclic aromatic hydrocarbons. For example, the lo...

AI Technical Summary

Problems solved by technology

Although relevant research has begun, limited by the use of catalysts, the specific implementation methods are still controversial, and the related diffusion, migration, and catalytic conversion mechanisms are not fully elucidated.

[0005] In addition, nanophotocatalysts have their own disadvantages and limitations

Nanoscale photocatalyst particles will be adsorbed or suspended in the dispersed phase and cannot be separated, causing huge waste and secondary pollution to the environment (Liu Zihong, Wang Xiang, 2006)

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