Secondary salinity soil heavy metal restoration agent

Abstract

The invention discloses a secondary salinity soil heavy metal restoration agent, which is prepared from the following raw materials (by weight): 8-9 parts of lignite, 5-6 parts of weathered coal, 2-3 parts of potassium carbonate, 32-35 parts of cassava residue, 13-15 parts of malt sprout, 1-3 parts of manganese sulfate, 77-83 parts of seeded sunflower disc, 35-38 parts of silkworm excrement, 24-26 parts of kaolin, 9-10 parts of calcium carbonate, 29-31 parts of slash pine needle and a proper amount of water. In allusion to physicochemical properties of secondary salinity soil, lots of organic humus including lignite, weathered coal and the like are added to dilute soil salt and alkali content and enhance granular structure of soil. Meanwhile, by strong water absorption of biochar, water evaporation of soil can be reduced, accumulation of saline matter evaporated with capillary water towards surface soil is decreased, organic matter and soil microorganisms are increased, pH value of soil is reduced, and the ecological environment around soil is fundamentally improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a secondary salinized 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 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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