Compound slow release fertilizer for repairing cadmium-contaminated soil and preparing method and application thereof

A technology for cadmium-contaminated soil and slow-release fertilizer, which is applied in the field of contaminated soil remediation, can solve problems such as unsatisfactory remediation effect, and achieves the effects of being easy to popularize in a large area, reducing cadmium content and low cost

Inactive Publication Date: 2015-11-11
江西省山江湖开发治理委员会办公室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 cadmium-contaminated soil, the remediation effect is not ideal, and the c

Method used

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  • Compound slow release fertilizer for repairing cadmium-contaminated soil and preparing method and application thereof
  • Compound slow release fertilizer for repairing cadmium-contaminated soil and preparing method and application thereof
  • Compound slow release fertilizer for repairing cadmium-contaminated soil and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a compound slow-release fertilizer for remediating cadmium-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] Poly 3-hydroxybutyrate, 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 the agricultural rare earth nitrate is 10 mesh, the particle diameter of the synthetic methanol catalyst waste agent is 10nm; the particle diameter of the humic acid ore powder, sepiolite, plant ash, kaolin and zeolite are all 110 mesh .

[0049] Further, the p...

Embodiment 2

[0052] This embodiment provides a compound slow-release fertilizer for remediating cadmium-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] Poly 4-hydroxybutyrate, 30 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 the agricultural rare earth nitrate is 10 mesh, the particle diameter of t...

Embodiment 3

[0074] This embodiment provides a compound slow-release fertilizer for remediating cadmium-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] Poly 3-hydroxybutyrate-4-hydroxybutyrate, 40 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 the agricultural rare earth nitrate is 10 meshes, the particle diameter of the synthetic methanol catalyst waste agent is 8nm; the particle diameters...

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Abstract

The invention provides compound slow release fertilizer for repairing cadmium-contaminated soil. The fertilizer comprises nitrogen, phosphorus and potassium nutrition components, rare earth nitrate for agricultural use, a waste catalyst, polyhydroxyalkanoate, humic acid mineral powder, sepiolite, plant ash, kaolin and a zeolite component, wherein the rare earth nitrate for agricultural use, the waste catalyst, the polyhydroxyalkanoate, the humic acid mineral powder, the sepiolite, the plant ash, the kaolin and the zeolite component are proportioned properly. After the fertilizer is applied to the cadmium-contaminated soil, under the synergistic effect of all the components, cadmium in the soil is effectively passivated and fixed, the polluted soil is effectively repaired, the activity of cadmium in the soil is reduced remarkably, the cadmium absorbability of crops is reduced, and then the content of cadmium in crops is reduced greatly. A compound modifier has high stability and environment friendliness, secondary pollution is avoided, cost is low, and large-area popularization is easy. Only 10-200 kg/hm2 fertilizer needs to be applied to the cadmium-contaminated soil to remarkably reduce the content of cadmium in crops, so that the crops meet the national food safety standard.

Description

technical field [0001] The invention relates to a compound slow-release fertilizer for repairing cadmium-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 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...

Claims

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Application Information

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IPC IPC(8): C05G3/04A01C21/00C05G3/80
Inventor 杨志平戴星照刘梅影黄齐
Owner 江西省山江湖开发治理委员会办公室
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