Animal and plant synergistic remediation method and device for site pollution

Abstract

The invention discloses an animal and plant synergistic remediation method and device for site pollution, and belongs to the technical field of soil remediation. The eisenia fetida plays a role in tolerance, enrichment and absorption of the eisenia fetida to heavy metals and activation of the eisenia fetida to the soil heavy metals in the activity process in the heavy metal contaminated soil remediation process, the activity of the activated heavy metals is improved, the extractable content is increased, and then the plant heavy metal extraction promoting agent is added, so that the heavy metal contaminated soil remediation efficiency is improved. The eisenia fetida is used as a raw material and is uniformly mixed with soil by adopting a specifically designed plowing and stirring machine, the absorption and utilization amount of plants is increased, meanwhile, the eisenia fetida can also increase the content of humus and organic acid in the soil in the process of degrading organic wastes in the soil, plant growth is promoted, humic acid provides certain nutrients for the soil, and the soil quality is improved. The method has the characteristics of low repairing cost, simplicity in operation and management, short repairing period, no secondary pollution and the like.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an animal-plant collaborative remediation method and device for site pollution. Background technique [0002] With the development of modern industry and urbanization, along with the improvement of our country's economic development, social progress and people's living environment requirements, our country has accelerated the process of urbanization and industrialization, which also means that our country's demand for mineral resources and water resources is also increasing sharply. Heavy metals have the characteristics of easy enrichment and difficult degradation, which has caused the problem of heavy metal pollution in my country's sites. Heavy metal pollution on site is a worldwide problem and has long been the focus of attention. With the implementation of policies such as my country's supply-side structural reform and industrial restructuring, a large number of heav...

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Problems solved by technology

[0004] At present, there are many ways to control heavy metal pollution, the common ones are mainly physical and chemical methods, such as chemical leaching, landfill, incineration, electrolysis, soil improvement, etc. Although these methods have significant short-term effects, they are costly and prone to secondary pollution. secondary pollution

In recent years, there is also chemical stabilization technology that has developed rapidly in recent years, that is, adding some active substances to polluted soil, such as lime, zeolite, phosphate, etc., by changing the physical and chemical properties of the soil, the adsorption of heavy metals in the soil is increased, and it is beneficial to The generation of active surface precipitates, or directly interact with heavy metals to form precipitates and complexes with low ecological solubility, thereby reducing the effective concentration of heavy metals in the soil, reducing their bioavailability and toxicity, so as to restore polluted soil and maintain health The purpose of food production, but this technology may lead to phosphorus leaching in local areas, lack of medium or trace elements necessary for plants, soil acidification and other consequences

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