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Soil remediation fertilizer and preparation method thereof

A soil repair and fertilizer technology, applied in the direction of organic fertilizer, inorganic fertilizer, ammonium salt fertilizer, etc., can solve the problems of endangering human health and life safety, crop production quality, decline, etc.

Pending Publication Date: 2021-06-08
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heavy metal pollution in farmland soil is extremely harmful. Heavy metal pollution in soil will not only reduce crop yield and quality, but also enter the human body through the soil-plant system and the food chain, endangering human health and life safety.

Method used

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  • Soil remediation fertilizer and preparation method thereof
  • Soil remediation fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of soil restoration fertilizer, described soil restoration fertilizer is made of following raw materials by weight: 30.9 parts of modified phosphogypsum, 21 parts of urea, 15 parts of modified porous ceramsite, 10 parts of diatomite, 6 parts of plant ash, 5 parts of Ammonium dihydrogen phosphate, 3.5 parts of fly ash, 3 parts of titanium dioxide, 2 parts of calcium polysulfide, 1.5 parts of ammonium chloride, 1.2 parts of chitosan, 0.5 parts of sodium carboxymethylcellulose, and 0.4 parts of fulvic acid.

[0036] The preparation method of described modified phosphogypsum is:

[0037] S1. Calcining phosphogypsum at 175°C for 3 hours to obtain calcined phosphogypsum; calcining medical stone powder at 280°C for 2 hours to obtain calcined medical stone powder;

[0038] S2. Mix the calcined phosphogypsum and the calcined medical stone powder evenly according to the weight ratio of 1:0.4 to obtain a composite powder;

[0039] S3. Calcining the composite powder at 550°...

Embodiment 2

[0051] A soil repair fertilizer, said soil repair fertilizer is made of the following raw materials in parts by weight: 22 parts of modified phosphogypsum, 25 parts of urea, 12 parts of modified porous ceramsite, 6 parts of diatomite, 4 parts of plant ash, 3 parts of Ammonium dihydrogen phosphate, 3 parts of fly ash, 2.5 parts of titanium dioxide, 1.8 parts of calcium polysulfide, 1 part of ammonium chloride, 1 part of chitosan, 0.2 parts of sodium carboxymethylcellulose, 0.1 part of fulvic acid.

[0052] The preparation method of described modified phosphogypsum is:

[0053] S1. Calcining phosphogypsum at 175°C for 3 hours to obtain calcined phosphogypsum; calcining medical stone powder at 280°C for 2 hours to obtain calcined medical stone powder;

[0054] S2. Mix the calcined phosphogypsum and the calcined medical stone powder evenly according to the weight ratio of 1:0.4 to obtain a composite powder;

[0055] S3. Calcining the composite powder at 550° C. for 2 hours to obt...

Embodiment 3

[0067] A soil repair fertilizer, said soil repair fertilizer is made of the following raw materials in parts by weight: 28 parts of modified phosphogypsum, 24 parts of urea, 14 parts of modified porous ceramsite, 11 parts of diatomaceous earth, 7 parts of plant ash, 7 parts of Ammonium dihydrogen phosphate, 5 parts of fly ash, 3.5 parts of titanium dioxide, 3 parts of calcium polysulfide, 2 parts of ammonium chloride, 1.5 parts of chitosan, 0.6 parts of sodium carboxymethyl cellulose, and 0.5 parts of fulvic acid.

[0068] The preparation method of described modified phosphogypsum is:

[0069] S1. Calcining phosphogypsum at 175°C for 3 hours to obtain calcined phosphogypsum; calcining medical stone powder at 280°C for 2 hours to obtain calcined medical stone powder;

[0070] S2. Mix the calcined phosphogypsum and the calcined medical stone powder evenly according to the weight ratio of 1:0.4 to obtain a composite powder;

[0071] S3. Calcining the composite powder at 550° C. ...

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Abstract

The invention discloses a soil remediation fertilizer and a preparation method thereof. The soil remediation fertilizer is prepared from the following raw materials in parts by weight: 25-32 parts of modified phosphogypsum, 18-25 parts of urea, 12-18 parts of modified porous ceramsite, 6-11 parts of diatomite, 4-8 parts of plant ash, 3-7 parts of ammonium dihydrogen phosphate, 3-5 parts of fly ash, 2.5-3.5 parts of titanium dioxide, 1.8-3 parts of calcium polysulfide, 1-2 parts of ammonium chloride, 1-1.5 parts of chitosan, 0.2-0.6 part of sodium carboxymethyl cellulose and 0.1-0.5 part of fulvic acid. The soil remediation fertilizer disclosed by the invention can be used for effectively remediating farmlands polluted by organic phosphorus and heavy metals while giving nutrients to the farmlands; by adding the modified ardealite and the modified porous ceramsite, the remediation on farmland polluted by organic phosphorus and heavy metals is remarkably improved, the modified ardealite is acidic, the modified porous ceramsite is alkaline, and the modified ardealite and the modified porous ceramsite have a remarkable synergistic interaction effect.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a soil repair fertilizer and a preparation method thereof. Background technique [0002] Phosphogypsum is a by-product of the wet-process phosphoric acid production process. Every 1 ton of phosphoric acid (calculated as P2O5) produces 4-5 tons of phosphogypsum. The color of phosphogypsum is off-white or gray-black, and its main component is CaSO 4 2H 2 O, its content is higher than that of natural gypsum, but because it contains many harmful impurities such as soluble phosphorus, eutectic phosphorus, soluble fluorine and organic matter, phosphogypsum cannot be directly used. [0003] Phosphogypsum contains phosphorus, calcium, magnesium, iron, silicon, sulfur and other nutrients needed for crop growth, provides surplus available phosphorus and available calcium and nutrients necessary for crop growth, improves the growth environment of crops, and increases the yield of crops...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/80
CPCC05G3/00C05G3/80C05B7/00C05C3/00C05C9/00C05D1/00C05D3/00C05D3/02C05D9/00C05D9/02C05F11/02
Inventor 覃柳川
Owner GUANGXI UNIV
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