Passivator for restoring heavy metal pollution in soil

A technology for repairing soil and passivating agents, applied in soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., can solve the problems of unsustainable effects and high prices, and achieve the effects of low cost, reduced effectiveness, and reduced pollution

Inactive Publication Date: 2018-02-09
芜湖恒杰膨润土科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the price of such passivators on the market is high and the effect is not long-lasting, which needs further improvement

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach

[0013] A specific embodiment of the present invention: a passivating agent for repairing soil heavy metal pollution, made of the following raw materials in parts by weight: 25-50 parts of bentonite mineral powder, 20-60 parts of straw ash, 20-60 parts of poultry manure, 10-20 parts of lime, 15-40 parts of ferric hydroxide and 10-30 parts of phosphate, the method that the raw material of above-mentioned weight part is made passivator, carries out according to the following steps:

[0014] 1) Grinding the bentonite raw material into 80-150 purpose bentonite slag;

[0015] 2) Dried the poultry manure and crushed it into 100-120 mesh powder;

[0016] 3) Weigh 30-45 parts by weight of bentonite mineral powder, 30-50 parts of poultry manure, 10-20 parts of lime, 20-35 parts of iron hydroxide, and 15-25 parts of phosphate, and stir to obtain a mixed material;

[0017] 4) Dry the mixed material through a dryer until the water content is 10-15%, to obtain the dried material;

[0018]...

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Abstract

The invention discloses a passivator for restoring heavy metal pollution in soil. The passivator is prepared from the following raw materials in parts by weight: 25-50 parts of bentonite mineral powder, 20-60 parts of straw ash, 20-60 parts of animal dung, 10-20 parts of lime, 15-40 parts of ferric hydroxide and 10-30 parts of a phosphate. The passivator provided by the invention has a stable repairing effect on heavy metal pollution in acidic and neutral soil; the cost is low; the use amount is small; a small amount of the passivator is applied to reduce the pollution of heavy metals in the soil to enable normal growth of plants in the soil; no negative influence is caused; and secondary pollution cannot be caused.

Description

technical field [0001] The invention relates to the field of safe production technology for eliminating heavy metal pollution in soil, in particular to a passivator for repairing heavy metal pollution in soil. Background technique [0002] Passivation means that if the corrosion product generated by the metal due to the action of the medium has a dense structure, a thin film (often invisible) is formed and tightly covered on the surface of the metal, which changes the surface state of the metal and makes the metal The electrode potential jumps greatly to the positive direction, and becomes a passive state of corrosion resistance. At present, heavy metal pollution in soil has become a global environmental problem, which constitutes a hidden, irreversible and long-term feature of the ecosystem, a huge threat to the ecosystem, and affects the health of humans and animals through the food chain. Therefore, it is of great significance to find effective and reasonable methods to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
Inventor 汪元良
Owner 芜湖恒杰膨润土科技有限公司
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