Soil restoration method

Abstract

The invention discloses a soil restoration method which includes the steps: restoration pretreatment: detecting the content of various heavy metal components in soil and preparing fixing agents according to detection data; soil turning and spraying: intermittently spraying the prepared fixing agents to the surface of the soil and deep plowing the soil. According to the soil restoration method, richness of organisms in the soil can be improved, soil restoration is accelerated, the content of heavy metals in the soil can be further reduced, so that soil environments reach optimum living environments suitable for hyperaccumulators, endophytic bacteria are implanted into the hyperaccumulators and can be combined with heavy metal ions in the hyperaccumulators by secreting various organic ligands, the availability of the heavy metals is increased, heavy metal absorption and transfer of host plants to overground stem leaf portions are improved, the content of the heavy metals in the soil canbe reduced, and a better use prospect is brought.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a soil restoration method. Background technique [0002] Soil is an important basis for human survival, but heavy metal pollution in soil has seriously threatened human health and sustainable economic development. It is one of the most difficult problems facing all countries in the world. The process of migration and accumulation produces a "biomagnification" effect, which poses a great threat to human health; [0003] There are certain disadvantages in the use of traditional soil remediation methods. The physical method of soil replacement changes the soil structure and soil water infiltration capacity of the plow layer, often resulting in a decline in soil fertility. It is necessary to restore soil fertility by supplementing soil nutrients in large quantities; at the same time, deep plowing It only dilutes the concentration of heavy metals in the surface soil, and does not fund...

AI Technical Summary

Problems solved by technology

[0002] Soil is an important basis for human survival, but heavy metal pollution in soil has seriously threatened human health and sustainable economic development. It is one of the most difficult problems facing all countries in the world. The process of migration and accumulation produces a "biomagnification" effect, which poses a great threat to human health;

[0003] There are certain disadvantages in the use of traditional soil remediation methods. The physical method of soil replacement changes the soil structure and soil water infiltration capacity of the plow layer, often resulting in a decline in soil fertility. It is necessary to restore soil fertility by supplementing a large amount of soil nutrients; at the same time, deep plowing It only dilutes the concentration of heavy metals in the surface soil, and does not fundamentally solve the problem of heavy metal pollution. However, there is insufficient research on the impact of changes in soil physical and chemical properties on the availability of soil nutrients and heavy metals; the chemical method is to extract heavy metals in the soil, While extracting heavy metal substances, it also adsorbs a large amount of nutrients in the soil, which destroys the balance of nutrients in the soil. This shows that although the extractant has a good leaching effect on heavy metal pollutants, the chelating agent is not effective in adsorbing heavy metal pollutants. At the same time, it will have adverse effects on the properties and nutrients of the soil, and there is a risk of secondary pollution. Therefore, we propose a soil remediation method

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