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Stable repairing agent for improving heavy metal soil, preparation method and application thereof

A technology of remediation agent and heavy metal, applied in the field of soil remediation

Active Publication Date: 2021-07-06
宋永平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of remediation of heavy metal pollution in mining soil, the present invention provides a stable remediation agent for improving heavy metal soil, which uses natural porous mineral materials and organic materials as substrates, and adjusts soil parameters through surface modification and microbial cooperation to make heavy metals It is stabilized and effectively reduced by solidification; the invention also discloses the preparation method of the stable repair agent, and the application of the stable repair agent in improving heavy metal soil

Method used

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  • Stable repairing agent for improving heavy metal soil, preparation method and application thereof
  • Stable repairing agent for improving heavy metal soil, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0035] Method for preparing a stable repair agent for improving heavy metal soil, including the following steps:

[0036] (1) Mix, sieve, washing, dry montmorillonite and diatomite (mass ratio of 2: 1), to obtain a mineral powder; dispersion of mineral powder in 6 wt% polyvinyl alcohol In the aqueous solution, the matrix dispersion is obtained; the concentration of the mineral powder in the base dispersion is 85 g / L;

[0037] The corn starch was dispersed in aqueous solution of 2 wt% hydroxypropyl chitosan, and then the microbacterial agent was added, and 1 h was mixed. 1 h was sealed, and the microbial suspension was obtained; in the aqueous solution of the hydroxypropyl chitosan The amount of corn starch is 40 g / L, and the added amount of microbial agent is 35 g / L;

[0038] After mixing the substrate dispersion and the microbial suspension (ie, the mass ratio of mineral powder, corn starch, microbacterial agent is 8.5: 4: 3.5), stirring cross-linking 7 h, and rejected at r...

Embodiment 2

[0053] The stabilized repair agent for improved heavy metal soil is prepared according to the method of Example 1, which is different from that the cured microorganism sustained release granules obtained from the step (1), the modified biomarbon produced from step (2), step (3) The resulting chelate adsorbing agent Mass comparison 8: 5: 3 mix.

Embodiment 3

[0055] The stabilized repair agent for improved heavy metal soil is prepared according to the method of Example 1, which is different from that the cured microorganism sustained release granules obtained from the step (1), the modified biomarbon produced from step (2), step (3) The resulting chelate adsorbing agent Mass comparison 5: 4: 1 mix.

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Abstract

The invention discloses a stable repairing agent for improving heavy metal soil. The stable repairing agent is prepared by compounding solidified microorganism slow-release particles, modified biomass charcoal and a chelating adsorbent, wherein the solidified microorganism slow-release particles are obtained by mixing and reacting an aqueous solution containing montmorillonite, diatomite and polyvinyl alcohol with an aqueous solution containing corn starch, a microbial agent and hydroxypropyl chitosan, the modified biomass charcoal is obtained by performing soaking pretreatment on organic matter powder through potassium chloride and magnesium chloride solutions and then performing carbonization, and the chelating adsorbent is prepared by grafting organosilane and tyrosine on the surface of hydroxyapatite. The invention further discloses a preparation method of the stable repairing agent and application of the stable repairing agent to improvement of heavy metal soil. According to the invention, natural porous mineral powder and organic matter materials are used as matrixes, the soil environment and plant survival conditions are improved, the metabolism function of microorganisms and plants is enhanced, heavy metal is solidified, stabilized and effectively reduced, and stable remediation of heavy metal soil is achieved.

Description

Technical field [0001] The present invention belongs to the soil repair technology, and in particular, the present invention relates to a stable repair agent for improved heavy metal soil and a preparation method thereof. Background technique [0002] Mining is an important pillar industry in my country's national economic construction, mining and mining production provides a wealth of raw materials and energy in my country's economic and social development, industrial and agricultural production and people's lives. However, after the mine is unordered, the mining waste is piled up, and some harmful substances can also dissolve into the ground through rain, severely destroy the ecological environment around the mining area, disturbing the ecological balance of the mining area. Therefore, it is important to repair the land of the mine area, and it is of great significance to develop scientific and reasonable land reclamation and ecological reconstruction planning, and it is also a...

Claims

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Application Information

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IPC IPC(8): C09K17/40A01B79/02B09C1/02B09C1/08B09C1/10
CPCC09K17/40A01B79/02B09C1/02B09C1/08B09C1/10
Inventor 朱新玉胡云川许会道许宁李佳秀唐永康丰园温孟钦
Owner 宋永平
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