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Composite improvement agent, preparation method and application thereof

The technology of improving agent and catalyst waste agent is applied in the field of contaminated soil remediation, which can solve the problems of unsatisfactory remediation effect and high content of heavy metals in crops, and achieve the effects of easy large-scale promotion, good stability and environmental friendliness, and reduction of heavy metal content.

Inactive Publication Date: 2015-12-09
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that after the soil conditioner in the prior art is applied to heavy metal-contaminated soil, the remediation effect is not ideal, and the heavy metal content in crops is still relatively high, so a soil remediation agent that has a good effect on soil remediation and can effectively reduce Amendment agent for cadmium-contaminated soil of heavy metal content in crops

Method used

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  • Composite improvement agent, preparation method and application thereof
  • Composite improvement agent, preparation method and application thereof
  • Composite improvement agent, preparation method and application thereof

Examples

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Embodiment 1

[0032] The present embodiment provides a kind of improver for cadmium polluted soil, and its raw material composition comprises:

[0033] Agricultural rare earth nitrate, 2 parts by weight;

[0034] Synthetic methanol catalyst waste agent, 2 parts by weight;

[0035] Medical stone, 2 parts by weight;

[0036] Humic acid mineral powder, 55 parts by weight;

[0037] Sepiolite, 15 parts by weight;

[0038] Plant ash, 11 parts by weight;

[0039] Kaolin, 0.5 parts by weight;

[0040] Zeolite, 1.2 parts by weight.

[0041] The particle diameter of the agricultural rare earth nitrate is 10 meshes, the particle diameter of the synthetic methanol waste catalyst is 10nm; the particle diameter of the medical stone, humic acid ore powder, sepiolite, plant ash, kaolin and zeolite Both are 110 mesh.

[0042] Further, the preparation method of the described improver for cadmium-contaminated soil is provided, specifically:

[0043] The composite improver is obtained by taking various...

Embodiment 2

[0045] The present embodiment provides a kind of improver for cadmium polluted soil, and its raw material composition comprises:

[0046] Agricultural rare earth nitrate, 0.5 parts by weight;

[0047] Synthetic methanol catalyst waste agent, 10 parts by weight;

[0048] Medical stone, 5 parts by weight;

[0049] Humic acid mineral powder, 25 parts by weight;

[0050] Sepiolite, 25 parts by weight;

[0051] Plant ash, 3 parts by weight;

[0052] Kaolin, 1.1 parts by weight;

[0053] Zeolite, 0.3 parts by weight;

[0054] Quicklime, 10 parts by weight;

[0055] Bentonite, 15 parts by weight;

[0056] Hydroxyapatite, 10 parts by weight;

[0057] Organic fertilizer, 20 parts by weight.

[0058] The particle size of the agricultural rare earth nitrate is 10 meshes, the particle size of the synthetic methanol catalyst waste agent is 9nm; the particle size of the medical stone, humic acid ore powder, sepiolite, plant ash, kaolin and zeolite Both are 140 mesh.

[0059] The ...

Embodiment 3

[0064] The present embodiment provides a kind of improver for cadmium polluted soil, and its raw material composition comprises:

[0065] Agricultural rare earth nitrate, 1.5 parts by weight;

[0066] Synthetic methanol catalyst waste agent, 5 parts by weight;

[0067] Medical stone, 4 parts by weight;

[0068] Humic acid mineral powder, 40 parts by weight;

[0069] Sepiolite, 17 parts by weight;

[0070] Plant ash, 8 parts by weight;

[0071] Kaolin, 0.9 parts by weight;

[0072] Zeolite, 0.8 parts by weight;

[0073] Bentonite, 10 parts by weight;

[0074] Organic fertilizer, 20 parts by weight.

[0075] The particle diameter of described agricultural rare earth nitrate is 10 meshes, and the particle diameter of described synthetic methanol waste catalyst is 8nm; The particle size is 140 mesh.

[0076] In the organic fertilizer, the mass fraction of organic matter in an oven-dried base is 55%; the mass fraction of nitrogen, phosphorus pentoxide and potassium oxide t...

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Abstract

The invention provides an improvement agent used in cadmium-polluted soil, which includes following components, in proper ratio: agricultural rare earth nitrates, waste catalyst, medical stone, humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite. When the improvement agent is applied in heavy metal-polluted soil, heavy metal in soil is effectively passivated and immobilized under a synergistic effect of the components above, and meanwhile, the polluted soil is effectively repaired, so that activity of the heavy metal in soil is significantly reduced and adsorption of crops to the heavy metal is effectively reduced, thereby reducing heavy metal content in crops significantly. The improvement agent is excellent in stability and environment-friendly property, is free of secondary pollution, is low in cost and is easy to popularize in large scale. When the fertilizer is applied in heavy metal-polluted soil, the use quantity is only 10-200 kg / hm<2>. The composite fertilizer can significantly reduce the heavy metal content in crops, so that the heavy metal content in crops reaches national food safety standard.

Description

technical field [0001] The invention relates to a composite improver for cadmium-contaminated soil, a preparation method and application thereof, and belongs to the technical field of contaminated soil remediation. Background technique [0002] With the rapid development of industry and the continuous increase of agricultural input intensity, a large number of heavy metals and other pollutants have entered the soil environment, which has caused heavy metal pollution in soil and has become a worldwide problem that has been widely concerned. According to reports, the cultivated land area polluted by cadmium, mercury, arsenic, chromium and lead in my country is nearly 20 million hm 3 , accounting for about 20% of the country's total arable land, has seriously affected the development of modern agriculture and social stability. [0003] The pollution of heavy metals in the soil directly leads to excessive heavy metal content in agricultural products, and then enters the human b...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/04A01B79/02B09C1/08C09K101/00C05G3/80
Inventor 王凌青
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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