Acidified soil heavy metal restoration agent

Abstract

The invention discloses an acidified soil heavy metal restoration agent, which is prepared from the following raw materials (by weight): 2-4 parts of quicklime, 2-3 parts of calcium sulfate, 6-9 parts of tobacco slag, 5-7 parts of iron chloride, 10-12 parts of monoammonium carbonate, 34-38 parts of coconut shell powder, 22-25 parts of charcoal, 3-4 parts of potassium sulfate, 88-92 parts of seeded sunflower disc, 24-26 parts of switchgrass branches and leaves, 25-28 parts of kaolin, 4-6 parts of calcium carbonate, 25-27 parts of slash pine needle and a proper amount of water. The soil restoration agent can be used for treating moderately acidified contaminated soil. With the addition of alkaline substances such as quicklime, calcium carbonate and the like, pH value of soil can be increased, and then microbial activities of soil are raised and decomposition of soil organic matter is accelerated. With matching of charcoal for adsorption of heavy metal cations, soil eluviation is decreased and soil fertility is increased. Thus, agriculture and forestry production of acidified soil is rapidly restored, and use value of soil is raised.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an acidified soil heavy metal remediation agent. 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 long-term un...

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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