Fertilizer capable of fixing soil heavy metal and preparing method thereof

A technology for heavy metals and fertilizers, applied in the chemical industry, can solve problems such as heavy metal pollution and increase crop yield, and achieve the effects of cost reduction, enhancement of cation exchange, strong cation exchange capacity and adsorption capacity

Inactive Publication Date: 2017-05-10
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a fertilizer for fixing soil heavy metals and a preparation method thereof, organically combine the production of fertilizers with the restoration of soil heavy metal pollution, so that the fertilizers produced can not only fully meet the needs of crop growth, Increase the yield of crops, and can also solidify the heavy metals in the soil, effectively solving the technical problem of heavy metal pollution in the soil

Method used

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  • Fertilizer capable of fixing soil heavy metal and preparing method thereof
  • Fertilizer capable of fixing soil heavy metal and preparing method thereof
  • Fertilizer capable of fixing soil heavy metal and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] raw material:

[0034] Urea 9kg, phosphoric acid 12kg, potassium carbonate 20kg, reaction aid 12kg, water 0.6kg, modified montmorillonite powder 15kg, calcium sulfate 0.6kg, aluminum sulfate 0.2kg, magnesium sulfate 0.3kg and ferrous sulfate 0.4kg.

[0035] Preparation:

[0036] (1) Pulverization: after mixing urea, phosphoric acid and potassium carbonate uniformly, pulverize to obtain solid particle powder with uniform particle size;

[0037] (2) Dry reaction: put the solid particle powder into the reaction kettle, use a sprinkler to spray the reaction auxiliary agent and water on the surface of the solid particle, so that the reaction auxiliary agent and the solid particle material are evenly mixed, and adjust the humidity in the reaction kettle After reacting at room temperature for 20 minutes, add calcium sulfate, aluminum sulfate, magnesium sulfate and ferrous sulfate to the reaction kettle, and stir evenly to obtain the primary fertilizer product;

[0038] (3) R...

Embodiment 2

[0049] raw material:

[0050] Urea 11kg, phosphoric acid 18kg, potassium hydroxide 50kg, reaction aid 20kg, water 1.5kg, modified montmorillonite powder 25kg, calcium sulfate 1.0kg, aluminum sulfate 0.6kg, magnesium sulfate 0.9kg and ferrous sulfate 1.2kg.

[0051] Preparation:

[0052] (1) Pulverization: Mix urea, phosphoric acid and potassium hydroxide uniformly and then pulverize to obtain solid particle powder with uniform particle size;

[0053] (2) Dry reaction: put the solid particle powder into the reaction kettle, use a sprinkler to spray the reaction aid and water on the surface of the solid particle, so that the reaction aid and the solid particle material are evenly mixed, and adjust the humidity in the reaction kettle After reacting at room temperature for 60 minutes, add calcium sulfate, aluminum sulfate, magnesium sulfate and ferrous sulfate to the reaction kettle, and stir evenly to obtain the primary fertilizer product;

[0054] (3) Rolling: Mix the primary ...

Embodiment 3

[0065] raw material:

[0066] Urea 10kg, phosphoric acid 15kg, potassium hydroxide 35kg, reaction aid 16kg, water 1kg, modified montmorillonite powder 20kg, calcium sulfate 0.8kg, aluminum sulfate 0.4kg, magnesium sulfate 0.6kg and ferrous sulfate 0.9kg.

[0067] Preparation:

[0068] (1) Pulverization: Mix urea, phosphoric acid and potassium hydroxide uniformly and then pulverize to obtain solid particle powder with uniform particle size;

[0069] (2) Dry reaction: put the solid particle powder into the reaction kettle, use a sprinkler to spray the reaction aid and water on the surface of the solid particle, so that the reaction aid and the solid particle material are evenly mixed, and adjust the humidity in the reaction kettle After reacting at room temperature for 40 minutes, calcium sulfate, aluminum sulfate, magnesium sulfate and ferrous sulfate were added to the reaction kettle, and the primary fertilizer product was obtained after stirring evenly;

[0070] (3) Rolling...

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Abstract

The invention relates to the technical field of chemical engineering, and discloses a fertilizer capable of fixing soil heavy metal and a preparing method thereof. The fertilizer is prepared from, by weight, 9-11 parts of urea, 12-18 parts of phosphoric acid, 20-50 parts of alkaline potassium, 12-20 parts of reaction auxiliary, 0.6-1.5 parts of water, 15-25 parts of modified smectite powder, 0.6-1.0 part of calcium sulfate, 0.2-0.6 part of aluminum sulfate, 0.3-0.9 part of magnesium sulfate and 0.4-1.2 parts of ferrous sulfate. The used reaction auxiliary can be used as a catalyst when urea reacts with phosphoric acid and can be used for removing heavy metal ions in soil, impurity removal is omitted, no effluent or waste gas is exhausted, raw materials used in production are fully and reasonably used, and the fertilizer has remarkable environment protection benefits.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a fertilizer for immobilizing soil heavy metals and a preparation method thereof. Background technique [0002] With the rapid development of industry and mining, as well as the abuse of sewage irrigation and sludge, irrational application of pesticides and fertilizers, incomplete combustion of fossil fuels and agricultural films and other reasons, heavy metal pollution has become increasingly serious, affecting the ecological environment and Human health poses a great threat. In addition, heavy metal pollution will also lead to soil degradation, crop failure, and may affect human life safety through the food chain. Therefore, the task of treatment and restoration of heavy metal-contaminated soil is very urgent. [0003] Aiming at the problem of heavy metal pollution in soil, after long-term continuous research and testing, there are currently three types of remediati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04B09C1/08C05G3/80
CPCB09C1/08C05B17/00C05G3/80C05C9/00C05D1/00C05D3/00C05D5/00C05D9/00C05D9/02
Inventor 陈肖虎黎志英王芹金会心权变利唐道文赵平原
Owner GUIZHOU UNIV
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