Soil heavy mental passivator and application thereof

Abstract

The invention relates to a soil heavy mental passivator and application thereof, and belongs to the technical field of a soil conditioner. The invention aims at solving a technical problem of providing a soil heavy mental passivator. The soil heavy mental passivator consists of the following components in parts by weight: 20-35 parts of humic acid, 30-50 parts of a sulfhydryl compound, 10-30 parts of calcium phosphate and 3-10 parts of chitosan. The soil heavy mental passivator disclosed by the invention can be used for effectively reducing the effectiveness of heavy metal mercury in soil, and relieving the absorption and enrichment of the mercury in crops; the physical properties and the fertility level of the soil are not damaged, and a certain production increasing effect is achieved; and the soil heavy mental passivator is simple in preparation method and low in cost; in addition, the soil heavy mental passivator disclosed by the invention has a certain repair effect on other heavy metals, and is conducive to the reduction of enrichment of other heavy metals in plant bodies.

Description

technical field [0001] The invention relates to a soil heavy metal passivator and its application, and belongs to the technical field of soil improvers. Background technique [0002] Environmental heavy metal pollution is a major environmental problem at home and abroad. Among heavy metals, mercury, cadmium, lead, arsenic, and chromium are the most harmful to human health and are often called "five poisonous elements". Heavy metals enter the soil environment through different channels. Most of the heavy metals in the soil remain in the soil in various forms through complex physical and chemical reactions. At the same time, heavy metals accumulate in the edible parts of crops and enter the food chain cycle, thus posing a threat to human health. . In addition, because the vast majority of heavy metals do not undergo microbial or chemical degradation in the soil environment, heavy metals entering the soil can continue to accumulate and eventually cause pollution hazards. Bec...

AI Technical Summary

Problems solved by technology

The application of inorganic passivation agents can greatly reduce the content of available heavy metals in the soil, thereby effectively inhibiting the content in plants, but a large amount of application of inorganic passivators will have a certain impact on the physical properties of the soil, and the overall fertility level will also decrease, resulting in crop yield reduction

Organic passivators have both the functions of passivating heavy metals and improving the physical and chemical properties of soil, but they are easy to decompose and the passivation effect is not durable.

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