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Phosphogypsum soil conditioner and preparation method thereof

A soil conditioner, phosphogypsum technology, applied in soil conditioning materials, chemical instruments and methods, and restoration of polluted soils, etc., can solve problems such as difficulty in achieving pre-set effects, weak heavy metal processing capacity, and single reactant situation. , to achieve the effect of reducing heavy metal ions, rich mineral content, and reducing dissolution

Active Publication Date: 2021-09-07
贵州星硕铭越环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the current technology, the removal process of heavy metals using phosphogypsum is relatively simple, which is basically physical adsorption, but the physical adsorption itself will be released again, which is unstable; chemical precipitation is also a relatively common treatment method at present, but the final reactant situation is single. When changing, heavy metals will be released in different forms, resulting in weak processing capacity of heavy metals in the use of phosphogypsum, and it is difficult to achieve the pre-set effect

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  • Phosphogypsum soil conditioner and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] A phosphogypsum soil improver, prepared from the following raw materials: phosphogypsum treated with active microorganisms as a carrier, formulated by adding modified activated carbon and an adsorbent; the mass of the phosphogypsum accounts for 40% of the total mass of the improver The mass ratio of the modified activated carbon to phosphogypsum is 1:3; the balance is an adsorbent; the phosphogypsum treated by the active microorganisms is obtained by mixing and soaking the fermented liquid of methane bacteria and phosphogypsum according to the mass ratio of 1:0.3 , the methane bacteria fermentation liquid is biogas slurry;

[0022] The preparation method of the phosphogypsum treated with active microorganisms is as follows: process the phosphogypsum into a powder with a fineness of 30 meshes, heat it to 30°C, mix and soak it with the biogas slurry for 3 hours; after filtering, pour the biogas slurry into a fermentation tank for fermentation, and continue Add new biogas ...

Embodiment 2

[0026] A phosphogypsum soil improver, prepared from the following raw materials: using phosphogypsum treated with active microorganisms as a carrier, adding modified activated carbon and an adsorbent; the mass of the phosphogypsum accounts for 60% of the total mass of the improver The mass ratio of the modified activated carbon to phosphogypsum is 1:5; the balance is adsorbent; the phosphogypsum treated by the active microorganisms is obtained by mixing and soaking the fermented liquid of methane bacteria and phosphogypsum according to the mass ratio of 1:0.4 , the methane bacteria fermentation liquid is biogas slurry;

[0027] The preparation method of the phosphogypsum treated with active microorganisms is as follows: process the phosphogypsum into a powder with a fineness of 50 meshes, heat it to 35°C, mix and soak it with the biogas slurry for 5 hours; after filtering, pour the biogas slurry into a fermentation tank for fermentation, continue Add new biogas slurry and phos...

Embodiment 3

[0031] A phosphogypsum soil improver, prepared from the following raw materials: using phosphogypsum treated with active microorganisms as a carrier, adding modified activated carbon and an adsorbent; the mass of the phosphogypsum accounts for 57% of the total mass of the improver The mass ratio of the modified activated carbon to phosphogypsum is 1:4; the balance is adsorbent; the phosphogypsum treated by the active microorganisms is obtained by mixing and soaking the fermented liquid of methane bacteria and phosphogypsum according to the mass ratio of 1:0.34 , the methane bacteria fermentation liquid is biogas slurry;

[0032] The preparation method of the phosphogypsum treated with active microorganisms is as follows: process the phosphogypsum into a powder with a fineness of 40 meshes, heat it to 33°C, mix and soak it with the biogas slurry for 4 hours; after filtering, pour the biogas slurry into a fermentation tank for fermentation, and continue Add new biogas slurry and...

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Abstract

The invention provides a phosphogypsum soil conditioner and a preparation method thereof, which are used for improving soil polluted by heavy metals, and belong to the field of soil conditioners. The phosphogypsum soil conditioner is prepared by taking phosphogypsum treated by active microorganisms as a carrier and adding modified activated carbon and an adsorbent for blending. The mass of the phosphogypsum accounts for 40-60% of the total mass of the conditioner; the mass ratio of the modified activated carbon to the phosphogypsum is 1: (3-5); and the balance is the adsorbent. The soil conditioner disclosed by the invention is rich in minerals, contains various fermentation active matters, and can be used for remarkably improving the activity of microorganisms in soil so as to improve the activity of phosphatase, so that the remediation capability of the soil is improved, an elastic mechanism of the soil for heavy metal sedimentation is formed, and the treatment effect on the heavy metal contaminated soil is remarkably improved.

Description

technical field [0001] A phosphogypsum soil improver and a preparation method thereof are used for improving soil polluted by heavy metals and belong to the field of soil improvers. Background technique [0002] Phosphogypsum is a by-product of the wet-process phosphoric acid process, and it is one of the largest solid wastes discharged by the chemical industry. my country's phosphogypsum resources and phosphogypsum production emissions have typical regional characteristics, with more than 90% concentrated in Yunnan, Guizhou, Sichuan and Hubei. In order to ensure the needs of agricultural production, my country needs to consume a large amount of phosphate fertilizer every year, and the production of one ton (P2O5 100%) high-concentration phosphate fertilizer can produce about 5-6 tons of phosphogypsum. According to the data provided by the China Phosphate Fertilizer Association, my country’s emission Phosphogypsum is about 75 million tons, and the overall utilization rate of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/10C09K109/00
CPCC09K17/40B09C1/08B09C1/10B09C1/105C09K2109/00B09C2101/00Y02W30/40
Inventor 张水涂汉肖艳桐张龙叶杨连
Owner 贵州星硕铭越环保科技有限公司
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