A kind of soil remediation particle and its preparation and use method

Abstract

A soil restoration particle and a preparing and using method thereof are provided. The soil restoration particle is a biological particle prepared by adding auxiliary materials into plant organic materials, sterilizing, activating, and performing a plurality of times of microorganism fermentation. After the soil restoration particle is added into heavy metal polluted soil, heavy metals in the soil can be combined with components of the soil restoration particle so that the heavy metals are immobilized, thus reducing direct position caused by concentration of the heavy metals in plants, and reducing or avoiding underground water source pollution caused by leaching, percolation, and the like of the heavy metals. Then heavy metal accumulate plants are cultured on the soil, and under synergistic effects of microorganisms, the particle slowly degrades into a small molecular structure, and is gradually absorbed and stored by the plants as nutrients carrying the combined heavy metal elements. In addition, the particle allows the amount of beneficial microorganisms (such as actinomycetes) in the soil to increase by dozens of times, thus promoting degradation of soil organic pollutants except the heavy metals, improving the micro-ecological environment of the soil, forming a good soil granular structure, restoring soil fertility, enhancing fertility, allowing accumulate plants to survive, breed and grow rapidly, increasing the absorption and storing amounts for the heavy metals, increasing the plant restoration efficiency by a plurality of times, and shortening the restoration period. The soil restoration particle and the method are free of secondary pollution and low in cost, and can ensure safety of the ecological environment.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a soil remediation granule and a preparation and use method thereof. Background technique [0002] There are many types of soil pollution, and the hazards are serious, especially heavy metal soil pollution, which has the characteristics of concealment, long-term, enrichment, and non-degradability. Once formed, it is difficult to remove, causing serious harm to the ecosystem and human health. [0003] Current status of remediation of heavy metal-contaminated soil: At present, physical, chemical and biological remediation methods are commonly used in the world. Although physical and chemical remediation methods are quicker, they have a large amount of work and high costs, which often change the physical and chemical properties of the soil and reduce soil fertility. , and may cause secondary pollution. [0004] Among bioremediation methods, phytoremediation is currently th...

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Problems solved by technology

[0006] Plants accumulating heavy metals generally grow slowly and have small biomass in the natural state. Most of them are wild plants and have their own geographical boundaries. In addition, in soil polluted by heavy metals, heavy metals will inhibit the normal reproduction of soil microorganisms and make the soil The micro-ecological environment is destroyed, and the fertility is severely reduced, which is not conducive to plant growth. Therefore, conventional phytoremediation generally has a slow repair progress and a long repair period.

[0007] In practice, the contradiction between the complex soil environment and plant adaptability often limits the remediation efficiency, and even fails to realize the phytoremediation function

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