Selenium-containing soil heavy metal restoration agent

Abstract

The invention discloses a selenium-containing soil heavy metal restoration agent, which is prepared from the following raw materials (by weight): 4-5 parts of lentinan, 2-3 parts of sodium selenite, 4-6 parts of chitosan, 16-18 parts of pasture powder, 8-10 parts of pig bone meal, 25-26 parts of vinegar residue, 6-7 parts of potassium nitrate, 82-88 parts of seeded sunflower disc, 32-36 parts of silkworm excrement, 15-18 parts of kaolin, 4-5 parts of calcium carbonate, 27-28 parts of slash pine needle and a proper amount of water. By using sodium selenite as exogenous selenium and by matching of lentinan, chitosan and the like, activity of urease and sucrose in soil can be increased, and the effect of increasing organic fertility of soil is further achieved. Meanwhile, with the addition of selenium, content of organically-bound heavy metal in soil is also decreased, soil immobilization effect of heavy metal especially mercury is enhanced, and bio-availability of soil heavy metal is further reduced. The product is used for restoration and improvement of soil quality.

Description

technical field [0001] The invention relates to the technical field of soil restoration, in particular to a soil heavy metal restoration agent containing selenium. Background technique [0002] The sources of heavy metal pollution in my country mainly include industrial "three wastes" discharge, seepage of household garbage, household coal burning, and vehicle exhaust emissions. Industries such as electroplating, plastics, chemicals, and mineral smelting and processing are the main industrial sources of heavy metals. The release of coal combustion is also one of the important causes of soil heavy metal pollution. Motor vehicle exhaust can also significantly cause heavy metal pollution in the soil on both sides of the road. The content of some heavy metal elements in municipal solid waste exceeds the standard, and long-term stacking will also cause heavy metals to leak into the soil, resulting in an increase in local heavy metal content in regional soil. In addition, the lon...

AI Technical Summary

Problems solved by technology

Heavy metal elements are easy to combine with the sulfhydryl group in the active part of the enzyme, and the metal element will replace the essential elements in the sulfur protein, such as Mg2+, Ca2+ and other biologically necessary elements. The antioxidant system in the system wreaks havoc

[0004] At present, the remediation technology of heavy metal-contaminated soil mainly adopts chemical means, but a large number of chemical agents used in the remediation process can easily cause soil re-pollution

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