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A sandy soil remediation agent in mining area and its preparation method and application method

A soil remediation agent and sandy soil technology, which is applied in the field of sandy soil remediation agent and its preparation in mining areas, can solve the problems of less engineering application and less sandy soil remediation, and achieve increased land fertility, large adsorption capacity, and multiple functions Effect

Active Publication Date: 2022-01-25
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few engineering applications of this method at present, and there are very few reports on the restoration of sandy soil in mining areas in northern Shaanxi.

Method used

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  • A sandy soil remediation agent in mining area and its preparation method and application method
  • A sandy soil remediation agent in mining area and its preparation method and application method
  • A sandy soil remediation agent in mining area and its preparation method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Primary pretreatment of fly ash: soak a certain amount of fly ash in a weak acid aqueous solution (solid-to-liquid mass ratio 1:7) for 5 hours, take out the fly ash and roast at 350°C for 1 hour, after cooling, put the fly ash Ash, granular organic matter, sludge protein, and starch are fully mixed according to the mass ratio of 5:1:1:1, and then the mixture is placed in deionized water (solid-liquid mass ratio 1:1), and then the obtained solid-liquid mixture is placed in 56 ℃ was irradiated with 450kGy gamma rays for 17min, and after irradiation, the solid-liquid mixture was cooled to room temperature and allowed to stand for 3h; the solid-liquid mixture was irradiated again with 450kGy gamma rays for 10min at 56℃. After the irradiation is completed, the separated solid-liquid mixture, the obtained solid substance is repeatedly washed with deionized water until the floating impurities are completely removed, and then the solid is smashed into small particles and drie...

Embodiment 2

[0040] 1) Primary pretreatment of fly ash: soak a certain amount of fly ash in weak acid aqueous solution (solid-to-liquid mass ratio 1:7.5) for 5.5 hours, take out the fly ash and roast at 370°C for 1.1 hours, after cooling, put Fly ash, granular organic matter, sludge protein, and starch are fully mixed according to the mass ratio of 6:1.5:1.5:1.2, and then the mixture is placed in deionized water (solid-liquid mass ratio 1:1.5), and then the obtained solid-liquid mixture 470kGy gamma rays were irradiated at 56.5°C for 18min, and the solid-liquid mixture was cooled to room temperature for 3.5h after irradiation; the solid-liquid mixture was irradiated again with 470kGy gamma rays for 11min at 56.5°C. After the irradiation is completed, the separated solid-liquid mixture, the obtained solid substance is repeatedly washed with deionized water until the floating impurities are completely removed, and then the solid is smashed into small particles and dried;

[0041] 2) Secondar...

Embodiment 3

[0054] 1) Primary pretreatment of fly ash: soak a certain amount of fly ash in weak acid aqueous solution (solid-to-liquid mass ratio 1:8) for 6 hours, take out the fly ash and roast at 400°C for 1.2 hours, after cooling the powder Coal ash, granular organic matter, sludge protein, and starch are fully mixed according to the mass ratio of 7:2:2:1.4, and then the mixture is placed in deionized water (solid-liquid mass ratio 1:2), and then the obtained solid-liquid mixture is placed in 57°C was irradiated with 490kGy gamma rays for 20min. After irradiation, the solid-liquid mixture was cooled to room temperature and allowed to stand for 4h; the solid-liquid mixture was irradiated again with 490kGy gamma rays for 13min at 57°C. After the irradiation is completed, the separated solid-liquid mixture, the obtained solid substance is repeatedly washed with deionized water until the floating impurities are completely removed, and then the solid is smashed into small particles and dried...

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Abstract

The invention discloses a sandy soil remediation agent in a mining area and its preparation method and application method. By modifying the fly ash, the fly ash and granular organic matter are properly mixed, and adjusted with starch, sludge protein and soluble organic matter. Its structure and functional group composition and activity, supplemented by irradiation and roasting treatment, dredged the pore structure of fly ash and improved the functional characteristics of functional groups, so that the release of nutrients and the adsorption of heavy metals can be maximized at the same time, effectively passivating soil heavy metals, Increase soil fertility; at the same time, the appropriate molecular weight of organic matter and starch and other nutrients and functional components are loaded on the fly ash restoration agent, which not only further increases the fertilizer efficiency of the restoration agent, but also improves the water retention performance of the restoration agent, making it more suitable for sandstorms in northern Shaanxi Restoration of damaged land in mining areas.

Description

technical field [0001] The invention belongs to the technical field of restoration of sandy soil pollution in mining areas, and in particular relates to a sandy soil restoration agent in mining areas and its preparation method and use method. Background technique [0002] As an important energy and chemical base in northern Shaanxi, its vigorous development of mineral energy has made a significant contribution to the development of the country. However, the mining of mineral energy and chemical production have seriously damaged the local ecological environment. A large amount of land has been destroyed, and the accumulation of solid waste has made the physical structure of these soils worse and worse, and the organic matter content is getting lower and lower. In addition, the arid and harsh climate makes these lands more and more unfavorable for plant survival. At the same time, the heavy metal content in the soil of the mining area is already too high, and it spreads over a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/00B09C1/08A01B79/02C05G3/80
CPCC09K17/40B09C1/00B09C1/08A01B79/02C05C11/00C05G3/80C05D9/02C05F11/00
Inventor 相玉琳相玉秀张鹏峰戴春雨焦玉荣张奥萌余登森
Owner YULIN UNIV
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