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Heavy metal passivating agent, farmland purifying method and use thereof

A heavy metal passivator and passivator technology, applied in chemical instruments and methods, land preparation methods, applications, etc., can solve the problem that the method of purifying farmland does not provide any enlightenment and so on

Inactive Publication Date: 2014-07-30
黎虹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above invention does not provide any enlightenment for the formula of passivating agent declared in this patent and the method for purifying farmland

Method used

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  • Heavy metal passivating agent, farmland purifying method and use thereof
  • Heavy metal passivating agent, farmland purifying method and use thereof
  • Heavy metal passivating agent, farmland purifying method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The present embodiment provides a kind of heavy metal deactivator, and raw material is calculated by weight percentage, comprises:

[0042] High calcium fly ash 40%; Plant ash 20%; Calcined gypsum 8%; Fluorapatite 10%; Vermiculite 15%; Iron sulfate 5%; Magnesium sulfate 1%. The balance is impurities.

[0043] Utilize the method for purifying farmland soil heavy metal pollution by above-mentioned heavy metal deactivator, comprise the steps:

[0044] (1) Fragmentation of soil clumps

[0045] (11) Use artificial methods to remove large-grained stones, plastics, batteries, etc. on the soil surface, and perform field drying treatment, that is, prevent water from entering the farmland and expose to the sun to reduce soil moisture content and improve soil mass fragmentation and screening performance;

[0046] (12) After drying the fields, use excavators or bulldozers to break the surface 20-50cm of soil into mounds, so as to facilitate the fast and convenient implementation...

Embodiment 2

[0059] The present embodiment provides a kind of heavy metal deactivator, and raw material is calculated by weight percentage, comprises:

[0060] High calcium fly ash 50%; Plant ash 25%; Calcined gypsum 4%; Fluorapatite 5%; Vermiculite 8%; Iron sulfate 1%: Magnesium sulfate 4%. The balance is impurities.

[0061] Utilize the method for purifying farmland soil heavy metal pollution by above-mentioned heavy metal deactivator, comprise the steps:

[0062] (1) Fragmentation of soil clumps

[0063] (11) Use artificial methods to remove large-grained stones, plastics, batteries, etc. on the soil surface, and perform field drying treatment, that is, prevent water from entering the farmland and expose to the sun to reduce soil moisture content and improve soil mass fragmentation and screening performance;

[0064] (12) After drying the field, use excavators or bulldozers to break the surface 20-50cm of soil into mounds, so as to facilitate the fast and convenient implementation of...

Embodiment 3

[0077] The present embodiment provides a kind of heavy metal deactivator, and raw material is calculated by weight percentage, comprises:

[0078] High calcium fly ash 48%; Plant ash 23%; Calcined gypsum 6%; Fluorapatite 8%; Vermiculite 13%; Iron sulfate 0.5%; Magnesium sulfate 0.5%.

[0079] Utilize the method for purifying farmland soil heavy metal pollution by above-mentioned heavy metal deactivator, comprise the steps:

[0080] (1) Fragmentation of soil clumps

[0081] (11) Use artificial methods to remove large-grained stones, plastics, batteries, etc. on the soil surface, and perform field drying treatment, that is, prevent water from entering the farmland and expose to the sun to reduce soil moisture content and improve soil mass fragmentation and screening performance;

[0082] (12) After drying the fields, use excavators or bulldozers to break the surface 20-50cm of soil into mounds, so as to facilitate the fast and convenient implementation of solid waste screening...

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Abstract

The present invention provides a heavy metal passivating agent, and a farmland purifying method and a use thereof. The raw materials comprise, by weight, 40-50% of high calcium fly ash, 20-25% of plant ash, 4-8% of gypsum, 5-10% of fluorapatite, 8-15% of vermiculite, 0.5-5% of ferric sulfate, and 0.5-5% of magnesium sulfate. The purifying method comprises: (1) crushing soil lumps; (2) adding the heavy metal passivating agent; (3) plowing the soil; (4) adding water to age; and (5) balancing. According to the present invention, the heavy metal in the farmland soil is well removed.

Description

technical field [0001] The invention relates to the field of remediation of polluted soil, in particular to a heavy metal passivator and its method and application for purifying farmland. Background technique [0002] At present, the situation of soil pollution prevention and control in my country is very grim. The soil pollution is serious in some areas, and the types of soil pollution are diverse, showing the coexistence of new and old pollutants, and the situation of inorganic and organic compound pollution. There are many ways of soil pollution, complex reasons, and difficult control. Agricultural product safety and human health incidents caused by soil pollution occur from time to time, becoming an important factor affecting agricultural production, public health and social stability. [0003] Soil pollutants mainly come from atmospheric deposition, discharge of industrial wastewater and domestic sewage, application of pesticides, dumping of industrial solid waste and do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06A01B79/00B09C1/08
Inventor 黎虹
Owner 黎虹
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