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Composite fertilizer for repairing lead-polluted soil, preparation method and application thereof

A technology of lead-contaminated soil and compound fertilizer, which is applied in the field of contaminated soil remediation, can solve problems such as unsatisfactory remediation effect, and achieve the effects of easy large-scale promotion, enhanced disease resistance, and enhanced remediation effect

Inactive Publication Date: 2015-12-09
CHINESE ACADEMY FOR ENVIRONMENTAL PLANNING
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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 lead-contaminated soil, the remediation effect is not satisfactory, and the lead content in the crops is still high, so a method is proposed that has a good effect on soil remediation and can effectively reduce Compound fertilizer for lead content in crops to repair lead-contaminated soil

Method used

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  • Composite fertilizer for repairing lead-polluted soil, preparation method and application thereof
  • Composite fertilizer for repairing lead-polluted soil, preparation method and application thereof
  • Composite fertilizer for repairing lead-polluted soil, preparation method and application thereof

Examples

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Embodiment 1

[0036] This embodiment provides a compound fertilizer for remediating lead-contaminated soil, and its raw material composition includes:

[0037] Urea, 10 parts by weight;

[0038] Monoammonium phosphate, 60 parts by weight;

[0039] Potassium chloride, 10 parts by weight;

[0040] Agricultural rare earth nitrate, 2 parts by weight;

[0041] Synthetic methanol catalyst waste agent, 2 parts by weight;

[0042] Chitosan, 10 parts by weight;

[0043] Humic acid mineral powder, 55 parts by weight;

[0044] Sepiolite, 15 parts by weight;

[0045] Plant ash, 11 parts by weight;

[0046] Kaolin, 0.5 parts by weight;

[0047] Zeolite, 1.2 parts by weight.

[0048] The particle diameter of described agricultural rare earth nitrate is 10 mesh, and the particle diameter of described synthetic methanol waste catalyst is 10nm; The particle diameter of described chitosan, humic acid ore powder, sepiolite, plant ash, kaolin and zeolite Both are 110 mesh.

[0049] Further, the prepa...

Embodiment 2

[0052] This embodiment provides a compound fertilizer for remediating lead-contaminated soil, and its raw material composition includes:

[0053] Ammonium carbonate, 60 parts by weight;

[0054] Diammonium phosphate, 10 parts by weight;

[0055] Potassium sulfate, 60 parts by weight;

[0056] Agricultural rare earth nitrate, 0.5 parts by weight;

[0057] Synthetic methanol catalyst waste agent, 10 parts by weight;

[0058] Chitosan, 15 parts by weight;

[0059] Humic acid mineral powder, 25 parts by weight;

[0060] Sepiolite, 25 parts by weight;

[0061] Plant ash, 3 parts by weight;

[0062] Kaolin, 1.1 parts by weight;

[0063] Zeolite, 0.3 parts by weight;

[0064] Quicklime, 10 parts by weight;

[0065] Bentonite, 15 parts by weight;

[0066] Hydroxyapatite, 10 parts by weight;

[0067] Organic fertilizer, 20 parts by weight.

[0068] The particle diameter of described agricultural rare earth nitrate is 10 meshes, and the particle diameter of described synthetic...

Embodiment 3

[0074] This embodiment provides a compound fertilizer for remediating lead-contaminated soil, and its raw material composition includes:

[0075] Ammonium sulfate, 40 parts by weight;

[0076] Superphosphate, 35 parts by weight;

[0077] Potassium silicate, 50 parts by weight;

[0078] Agricultural rare earth nitrate, 1.5 parts by weight;

[0079] Synthetic methanol catalyst waste agent, 5 parts by weight;

[0080] Chitosan, 30 parts by weight;

[0081] Humic acid mineral powder, 40 parts by weight;

[0082] Sepiolite, 17 parts by weight;

[0083] Plant ash, 8 parts by weight;

[0084] Kaolin, 0.9 parts by weight;

[0085] Zeolite, 0.8 parts by weight;

[0086] Bentonite, 10 parts by weight;

[0087] Organic fertilizer, 20 parts by weight.

[0088] The particle diameter of described agricultural rare earth nitrate is 10 orders, and the particle diameter of described synthetic methanol waste catalyst is 8nm; The particle size is 140 mesh.

[0089] In the organic fer...

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Abstract

The invention provides a composite fertilizer for repairing lead-polluted soil, which includes nitrogen, phosphorus and potassium nutrients and the following components, in proper ratio: agricultural rare earth nitrates, waste catalyst, chitosan, humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite. When the fertilizer is applied in lead-polluted soil, lead 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 lead in soil is significantly reduced and adsorption of crops to lead is effectively reduced, thereby reducing lead content in crops significantly. The composite fertilizer 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 lead-polluted soil, the use quantity is only 10-200 kg / hm<2>. The composite fertilizer can significantly reduce the lead content in crops, so that the lead content in crops reaches national food safety standard.

Description

technical field [0001] The invention relates to a compound fertilizer for repairing lead-contaminated soil, a preparation method and application thereof, and belongs to the technical field of contaminated soil repair. 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 area of ​​cultivated land polluted by lead, mercury, arsenic, chromium and cadmium 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
Inventor 陈岩吴悦颖王东张文静韦大明白辉赵翠平
Owner CHINESE ACADEMY FOR ENVIRONMENTAL PLANNING
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