Combined application of selenium-containing agricultural preparation and soil heavy metal remediation agent

Abstract

The invention provides a combined application of a selenium-containing agricultural preparation and a soil heavy metal remediation agent. According to the combined application of the soil heavy metal remediation agent, the soil heavy metal remediation agent comprises lentinan and chitosan. Through the combined application, the effect of the soil heavy metal remediation agent can also be enhanced, so that the content of heavy metal, such as cadmium in plants (especially plant seeds), can be remarkably reduced.

Description

technical field [0001] The invention belongs to the field of pollutant treatment and the field of agricultural compositions. Specifically, the invention relates to the joint application of selenium-containing agricultural preparations and soil heavy metal remediation agents. Background technique [0002] In recent years, the problem of heavy metal pollution in my country's soil has become increasingly prominent, posing a serious threat to the ecological environment, food safety and human health, which cannot be ignored. Waste gas, waste water, and waste residues discharged from industries such as dyestuffs, chemicals, tanning, mineral mining, smelting, and processing contain a large amount of heavy metals. Into the soil through other methods, resulting in an increase in the content of heavy metals in the soil, especially the exchangeable heavy metals, which are directly absorbed and enriched by crops, directly threatening human health. [0003] At present, the soil is repai...

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Problems solved by technology

[0005] Chinese patent 200910115020 discloses a soil remediation method. By digging a liquid injection well and building a reaction wall, the chitosan eluent is injected into the soil. However, the inventors found that this method has a large amount of engineering, is inconvenient to apply, and is difficult to popularize. ;

[0006] Chinese patent 201110413145 discloses a method for remediating heavy metal cadmium-contaminated soil, using cadmium-resistant tobacco varieties, chitosan solution and microorganisms that activate heavy metal cadmium in the soil to work together, but its application is narrow and difficult to repeat;

The existing technologies, such as Chinese patents 200410009345, 200410084878, 200610086308 and 200910213516, etc., are basically to increase the selenium content in plants (such as the production of selenium-enriched rice), and there is no suggestion of using it in combination with soil heavy metal remediation agents

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