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Compound fertilizer for repairing cadmium contaminated soil as well as preparation method and application of compound fertilizer

A technology for cadmium-contaminated soil and compound fertilizer, 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, low cost, good stability and environmental friendliness

Inactive Publication Date: 2015-08-19
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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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 cadmium content in the crops is still high, so a method with good soil remediation effect and can effectively reduce the Compound fertilizer for remediation of cadmium-contaminated soil by cadmium content in crops

Method used

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  • Compound fertilizer for repairing cadmium contaminated soil as well as preparation method and application of compound fertilizer
  • Compound fertilizer for repairing cadmium contaminated soil as well as preparation method and application of compound fertilizer
  • Compound fertilizer for repairing cadmium contaminated soil as well as preparation method and application of compound fertilizer

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a kind of compound fertilizer for remediating cadmium-contaminated soil, and its raw material composition comprises:

[0036] Urea, 10 parts by weight;

[0037] Monoammonium phosphate, 60 parts by weight;

[0038] Potassium chloride, 10 parts by weight;

[0039] Agricultural rare earth nitrate, 2 parts by weight;

[0040] Synthetic methanol catalyst waste agent, 2 parts by weight;

[0041] Humic acid mineral powder, 55 parts by weight;

[0042] Sepiolite, 15 parts by weight;

[0043] Plant ash, 11 parts by weight;

[0044] Kaolin, 0.5 parts by weight;

[0045] Zeolite, 1.2 parts by weight.

[0046] The particle size of the agricultural rare earth nitrate is 10 meshes, the particle size of the spent synthetic methanol catalyst is 10 nm; the particle sizes of the humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite are all 110 meshes.

[0047] Further, the preparation method of the compound fertilizer for repairing cadmium-c...

Embodiment 2

[0050] This embodiment provides a kind of compound fertilizer for remediating cadmium-contaminated soil, and its raw material composition comprises:

[0051] Ammonium carbonate, 60 parts by weight;

[0052] Diammonium phosphate, 10 parts by weight;

[0053] Potassium sulfate, 60 parts by weight;

[0054] Agricultural rare earth nitrate, 0.5 parts by weight;

[0055] Synthetic methanol catalyst waste agent, 10 parts by weight;

[0056] Humic acid mineral powder, 25 parts by weight;

[0057] Sepiolite, 25 parts by weight;

[0058] Plant ash, 3 parts by weight;

[0059] Kaolin, 1.1 parts by weight;

[0060] Zeolite, 0.3 parts by weight;

[0061]Quicklime, 10 parts by weight;

[0062] Bentonite, 15 parts by weight;

[0063] Hydroxyapatite, 10 parts by weight;

[0064] Organic fertilizer, 20 parts by weight.

[0065] The particle size of the agricultural rare earth nitrate is 10 meshes, the particle size of the spent synthetic methanol catalyst is 9nm; the particle size ...

Embodiment 3

[0071] This embodiment provides a kind of compound fertilizer for remediating cadmium-contaminated soil, and its raw material composition comprises:

[0072] Ammonium sulfate, 40 parts by weight;

[0073] Superphosphate, 35 parts by weight;

[0074] Potassium silicate, 50 parts by weight;

[0075] Agricultural rare earth nitrate, 1.5 parts by weight;

[0076] Synthetic methanol catalyst waste agent, 5 parts by weight;

[0077] Humic acid mineral powder, 40 parts by weight;

[0078] Sepiolite, 17 parts by weight;

[0079] Plant ash, 8 parts by weight;

[0080] Kaolin, 0.9 parts by weight;

[0081] Zeolite, 0.8 parts by weight;

[0082] Bentonite, 10 parts by weight;

[0083] Organic fertilizer, 20 parts by weight.

[0084] The particle size of the agricultural rare earth nitrate is 10 meshes, the particle size of the synthetic methanol catalyst waste agent is 8nm; the particle size of the humic acid ore powder, sepiolite, plant ash, kaolin, zeolite and bentonite are al...

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Abstract

The invention provides a compound fertilizer for repairing cadmium contaminated soil. The compound fertilizer comprises nitrogen, phosphorus and potassium nutrition components and appropriate proportions of agricultural nitric acid rare earth, waste catalyst agent, humic acid mineral powder, meerschaum, plant ash, kaolin and zeolite components. When the compound fertilizer is applied to the cadmium contaminated soil, under the synergistic action of the components, the cadmium in the soil is effectively passivated and fixed, and meanwhile the contaminated soil is effectively repaired, so that the activity of the cadmium in the soil is significantly reduced, the compound fertilizer is beneficial for reducing the absorption of cadmium by crops, and then the cadmium content in the crops is significantly reduced. The compound modifier provided by the invention is relatively good in stability and environment-friendliness, does not generate secondary pollution, and is low in cost and easy to popularize in a large area, and when applied to the cadmium contaminated soil, the applied amount is only 10-200kg / hm<2>, and the cadmium content in the crops can be significantly reduced to reach a national edible safety standard.

Description

technical field [0001] The invention relates to a compound 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 enters the h...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 王凌青梁涛张倩
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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