Composite soil conditioner and application thereof

Abstract

The invention belongs to the technical field of soil conditioning, and particularly relates to a composite soil conditioner and application thereof. The composite soil conditioner comprises the following components in parts by mass: 15-45 parts of peroxide, 15-30 parts of a magnesium cyanamide compound and 25-70 parts of a dispersing aid. According to the invention, a novel Fenton-like system withperoxide as an oxidizing agent and a magnesium cyanamide compound as a catalyst is used, iron mud cannot be generated in the process of degrading organic pollutants, no toxic metal component is introduced, and magnesium oxide in a magnesium cyanamide composite material has very high adsorption performance, can adsorb heavy metal and stabilize heavy metal ions and has relatively good effect on stabilization of heavy metal ions in soil; and through the synergistic effect of various components, free heavy metals can be effectively adsorbed while a fertilizer is provided, and the stabilization and the degradation of organic pollutants difficult to biodegrade can be achieved.

Description

technical field [0001] The invention belongs to the technical field of soil conditioning, and more specifically relates to a composite soil conditioner and its application. Background technique [0002] With the rapid development of modern industry and agriculture, a large amount of industrial waste and domestic waste containing organic pollutants and heavy metals enter the soil, as well as the unreasonable use of a large amount of chemical fertilizers and pesticides, resulting in the destruction of soil structure, decline of soil fertility, and changes in soil physical and chemical properties. , the yield is reduced. These pollutants are highly toxic in soil, difficult to degrade naturally, easy to accumulate, and cause serious harm to human health and ecosystems. Therefore, it is very valuable to remediate and condition these polluted lands. [0003] At present, chemical remediation, as a common soil remediation technology, is often used to remediate organic matter and h...

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Problems solved by technology

[0007] For the above defects of the prior art, the invention provides a composite soil conditioner, the purpose of which is to solve the organic pollution by reacting the peroxide with the organic matter. Magnesium cyanamide composite material contains magnesium oxide and magnesium cyanamide, which has very Strong adsorption performance, can adsorb heavy metals and realize the stability of heavy metal ions, thereby solving the technical problems of heavy metal pollution and organic pollution, and does not bring secondary pollution

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