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Compound mixed biological bacterial fertilizer for restoring cadmium contaminated soil and preparation method and application thereof

A technology for cadmium-contaminated soil and biological bacterial fertilizer, applied in the field of contaminated soil remediation, can solve problems such as unsatisfactory remediation effect, and achieve the effect of being easy to popularize in a large area, strengthening the remediation effect, and reducing absorption

Inactive Publication Date: 2015-11-04
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 biological fertilizer for repairing cadmium-contaminated soil with cadmium content in crops

Method used

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  • Compound mixed biological bacterial fertilizer for restoring cadmium contaminated soil and preparation method and application thereof
  • Compound mixed biological bacterial fertilizer for restoring cadmium contaminated soil and preparation method and application thereof
  • Compound mixed biological bacterial fertilizer for restoring cadmium contaminated soil and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] This embodiment provides a kind of compound biological bacterial fertilizer for repairing cadmium-contaminated soil, and its raw material composition comprises:

[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] Azotobacter microbial bacterial agent, 2 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 mes...

Embodiment 2

[0052] This embodiment provides a kind of compound biological bacterial fertilizer for repairing cadmium-contaminated soil, and its raw material composition comprises:

[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]Phosphorus solubilizing fungus microbial bacterial agent, 5 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 ear...

Embodiment 3

[0074] This embodiment provides a kind of compound biological bacterial fertilizer for repairing cadmium-contaminated soil, and its raw material composition comprises:

[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] Potassium-dissolving fungus microbial bacterial agent, 10 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...

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Abstract

The invention provides a compound mixed biological bacterial fertilizer for restoring cadmium contaminated soil; the compound mixed biological bacterial fertilizer includes NPK nutritious components and agricultural rare earth nitrate, a catalyst waste agent, a microbial agent, a humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite with proper proportion; after the compound mixed biological bacterial fertilizer is applied to the cadmium contaminated soil, under the synergy of all the components, the contaminated soil is effectively restored while cadmium in the soil is effectively passivated and immobilized, the cadmium activity in the soil is decreased significantly, and the absorption of crops on cadmium is facilitated to be reduced, so as to make the cadmium content in the crops decreased significantly; the compound improver has relatively good stability and environmental friendly characteristic, does not produce secondary pollution, and is low in cost and prone to large-area promotion; when the compound mixed biological bacterial fertilizer is applied to the cadmium contaminated soil, the application amount is only 10-200 kg / hm<2>, the cadmium content in the crops can be significantly reduced, and the crops are allowed to meet national edible safety standards.

Description

technical field [0001] The invention relates to a compound biological bacterial 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04A01C21/00C05G3/80
Inventor 童亚莉梁涛王凌青
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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