Contaminated soil remediation methods

1. Soil replacement method: mainly use clean soil to replace all or part of the contaminated soil, or in the heavy metal contaminated soil covered with a layer of clean soil, but this method requires replacing or removing the soil layer is greater than the cultivation layer of 20cm, so that planting crops on the soil can effectively reduce the pollutant content of the crops, which has the advantages of low, stable, but the main disadvantage of this method is that not only need to spend a lot of manpower and material and financial resources, while destroying the soil structure and occupying a certain amount of land. However, the main disadvantage of this method is that it not only requires a lot of manpower, material and financial resources, but also destroys the soil structure and occupies a certain amount of land.

2. Phytoremediation: The use of agricultural technology to improve the chemical and physical constraints of the soil that are unfavorable to the growth of plants, make it suitable for planting, and through the planting of preferred plants and their inter-root microorganisms directly or indirectly absorbing, volatilizing, separating, and degrading pollutants, restoring and rebuilding the natural ecological environment and vegetation landscape.