Photocatalysis soil heavy metal restoration agent

Abstract

The invention discloses a photocatalysis soil heavy metal restoration agent, which is prepared from the following raw materials (by weight): 4-5 parts of titanium dioxide, 12-13 parts of egg shell, 5-6 parts of calcium ammonium nitrate, 6-8 parts of flyash, 10-14 parts of water hyacinth powder, 2-4 parts of potassium pyrophosphate, 85-95 parts of seeded sunflower disc, 40-45 parts of pig dung, 23-26 parts of kaolin, 12-14 parts of calcium carbonate, 32-35 parts of slash pine needle and a proper amount of water. By using organic biomass charcoal and organic fermented materials as adsorption carriers, lots of organic pollutants such as heavy metal ions and pesticide residue, etc. can be adsorbed on particle surface. After transmission light in soil catalyzes and restores titanium dioxide on particle surface, organic matter can be subjected to oxidative degradation, thus achieving the effect of thoroughly removing noxious substances in soil. The product has a good application prospect in the field of soil restoration.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a photocatalytic 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-ter...

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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