Soil repairing agent for heavy metal element contaminated soil and preparation method of soil repairing agent

Abstract

The invention discloses a soil repairing agent for heavy metal element contaminated soil and a preparation method of the soil repairing agent. The soil repairing agent comprises the following components: calcium silicate, lime, calcium phosphate, sulfur, an organic fertilizer and modified acrylic fibers. The preparation method of the soil repairing agent comprises the following steps: preparing the organic fertilizer; preparing the modified acrylic fibers; and uniformly mixing the calcium silicate, the lime, the calcium phosphate, the sulfur, the organic fertilizer and the modified acrylic fibers to obtain the soil repairing agent. The calcium silicate, the lime, the calcium phosphate, the sulfur, the organic fertilizer and the modified acrylic fiber in the soil repairing agent act together to provide nutrient elements for growth and development of crops, heavy metal ions in soil are fixed, the content and activity of the heavy metal ions in the soil are reduced, and heavy metal adsorption by crops is inhibited, so that the purpose of treating heavy metal ion pollution in the soil is achieved. The experimental structure shows that the soil repairing agent prepared by the method hasa good treatment and repairing effect on the heavy metal contaminated soil.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a soil remediation agent for soil polluted by heavy metal elements and a preparation method thereof. Background technique [0002] With the development of industry and the modernization of agricultural production, soil pollution is becoming more and more serious. However, heavy metal pollution in farmland soil is extremely harmful. Heavy metal pollution in soil will not only reduce crop yield and quality, but also enter the human body through the soil-plant system and the food chain, endangering human health and life safety. Soil heavy metal pollution has the characteristics of concealment, hazard lag, long-term nature, and bioaccumulation of heavy metals in the biological chain. These determine that if the understanding and treatment of soil heavy metal pollution are delayed, it will bring unpredictable and serious consequences. For example, the "Itai-Itai Disease" env...

AI Technical Summary

Problems solved by technology

The use of engineering to control heavy metal pollution in soil has the advantages of obvious and rapid treatment effects on heavily polluted and small-area soils, but for farmland polluted soils with large polluted areas, light degrees and wide ranges, it needs to consume a lot of manpower and resources. Financial resources, and easily lead to the destruction of soil structure and the decline of soil fertility

[0004] Traditional remediation methods for soil heavy metal pollution, such as landfill, leaching, and electrochemical methods, require a large amount of engineering, high cost, and are difficult to use on a large scale, and often lead to the destruction of soil structure and the leaching of certain nutrients

The phytoremediation technology using the characteristics of plant tolerance and super-accumulation of certain heavy metals or certain chemical elements is becoming a hot topic and frontier topic at home and abroad due to its advantages of being effective, non-destructive, and economical. Contradictions are prominent. At this stage, it is unlikely to use green and environmentally friendly phytoremediation to carry out large-scale ecological reconstruction of heavy metal-contaminated cultivated land.

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