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Conditioner used for restoring soil polluted by magnesite dust and preparation method thereof

A dust pollution and soil remediation technology, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of abandoned farmland, soil pollution, crop yield reduction, etc., to reduce soil bulk density and protect ecology. environment, the effect of improving the productivity of the land

Inactive Publication Date: 2008-08-13
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the dust settles to the ground, the soil is seriously polluted, resulting in a large area of ​​crop production reduction or even abandonment of land.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 50 kilograms of lignite and 40 kilograms of phosphogypsum. After mixing evenly, spread it on the cement floor with a thickness of 15-30 cm. Add about 12 liters of dilute sulfuric acid with a concentration of 5% in 3-4 times (the weight of sulfuric acid after air drying is equivalent to 1 kg ), mix uniformly, add 5 kg of urea, 3 kg of potassium sulfate and 1 kg of zinc sulfate after air-drying, and then sieve with 40 meshes to make a soil conditioner.

[0020] The lignite commercially available products, urea, potassium sulfate, and zinc sulfate are commercially available chemical fertilizers; the phosphogypsum is a waste from the production of phosphorus pentoxide; among them, the technical indicators of phosphogypsum can be found in Xi Meiyun: Comprehensive utilization of phosphogypsum. Environment. Science and Technology, No. 3, 2001, pp. 10-13. The dilute sulfuric acid is industrial concentrated sulfuric acid (sulfuric acid content 95%-98%, density 1.83-1.84 molar co...

Embodiment 2

[0022] The difference from Example 1 is that the ratio of raw materials is different, and the preparation method is the same as that of Example 1.

[0023] serial number

[0024] 9

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PUM

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Abstract

The invention relates to soil regulator, specifically, a regulator for modifying magnesite dust-polluted soil and preparation method thereof. The soil regulator comprises lignite 40% to 50%, phosphogypsum 40% to 50%, vitriol 0.5% to 1.5%, urea 3% to 5%, potassium sulfate 3% to 5%, and zinc sulfate 0.5% to 1.5% according to weight percent. The method comprises the steps of after mixing lignite and phosphogypsum, adding diluted vitriol to regulate acidity, after natural air-dry treatment, compensating adequate nitrogenous resource and mineral fertilizer, finally mixing it to prepare the soil regulator. The preparation method of the invention is simple with low finished product cost without pollution, which is capable of neutralizing basic ion in soil, promoting calcium-magnesium balance in soil, and improving content of organic matter and effective nutrient in soil. The invention is specific soil regulator for modification of magnesite dust-polluted soil.

Description

Technical field [0001] The invention relates to a soil conditioner, in particular to a conditioner for remediation of soil contaminated by magnesite dust and a preparation method thereof. Background technique [0002] my country's magnesite is rich in resources and excellent in texture. It is one of the dominant minerals and occupies an important position in the world. A total of 27 magnesite mining areas have been proven nationwide, with 3.001 billion tons of magnesite reserves, of which A+B+C grade reserves are 1.312 billion tons, accounting for 43.72% of the total reserves. According to the United States Bureau of Mines (Mineral Commodity Summaries, 1996), the world’s reserves of magnesite are 2.5 billion tons, the reserve base is 3.4 billion tons, and the resources are about 12 billion tons. [0003] Due to the large amount of dust produced during the calcination process of magnesite mining (the main component is MgO). After the dust settles on the ground, the soil is severel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/02B09C1/00
Inventor 姜勇梁文举张玉革于谦
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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