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Microbial sand-fixing dust depressor and preparation method thereof

A technology of dust suppressant and microorganism, applied in chemical instruments and methods, fertilizer mixtures, other chemical processes, etc., to achieve good water permeability, strong adaptability, and strong practicability

Inactive Publication Date: 2014-05-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The purpose of the present invention is to provide a microbial sand-fixing and dust-suppressing agent with good sand-fixing effect, strong permeability, strong aging resistance, no pollution to the environment, low cost, easy to prepare and construct, and a preparation method thereof, which can effectively solve desertification, Problems such as slope reinforcement and urban dust

Method used

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  • Microbial sand-fixing dust depressor and preparation method thereof
  • Microbial sand-fixing dust depressor and preparation method thereof
  • Microbial sand-fixing dust depressor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) According to the mass percentage, add 9.3% calcium chloride to 85% water, stir until it is completely dissolved, then add 5.0% urea to it, and then add 1.7% urea after it is completely dissolved. Bacillus subtilis bacteria powder, stir until it dissolves completely, then the sand-fixing agent of the present invention can be obtained. The whole reaction process was carried out at normal temperature.

[0018] (2) Consolidated layer hardness and unconfined compressive strength tests were carried out on the sand-fixing agent prepared in this example.

[0019] ①Consolidated layer hardness test

[0020] The hardness of the cured sand samples was tested by LX-D Shore hardness tester. The method is as follows: Take 100g of sand samples (with a particle size of 0.15-0.30mm), put them into a petri dish with a diameter of 95mm, spread them flat and compact them. Then measure 15mL of microbial sand-fixing and dust-suppressing agent and spray evenly on the surface of the sand...

Embodiment 2

[0030] (1) In terms of mass percentage, add 10.1% calcium chloride to 84% water, stir until it is completely dissolved, then add 3.0% urea, and then add 2.5% urea after it is completely dissolved. Bacillus subtilis bacteria powder, stir until it dissolves completely, then the sand-fixing agent of the present invention can be obtained. The whole reaction process was carried out at normal temperature.

[0031] (2) Carry out an aging resistance test on the sand-fixing agent prepared in this example.

[0032] Take 33g of sand samples (with a particle size of 0.15-0.30mm), put them into a syringe with a diameter of 3cm, spread them flat and compact them. Then measure 15mL of microbial sand-fixing and dust-suppressing agent and spray evenly on the surface of the sand sample. After the penetration is complete, repeat the spraying of the microbial sand-fixing and dust-suppressing agent. Then put it in an oven (60°C), and take it out after 48 hours to smooth the surface to be tested...

Embodiment 3

[0037] (1) In terms of mass percentage, add 8.3% calcium chloride to 85% water, stir until it is completely dissolved, then add 4.9% urea, and then add 2.0% urea after it is completely dissolved. Bacillus subtilis bacteria powder, stir until it dissolves completely, then the sand-fixing agent of the present invention can be obtained. The whole reaction process was carried out at normal temperature.

[0038] (2) Conduct a wind erosion test on the sand-fixing agent prepared in this example.

[0039] Take 3000g of sand samples (with a particle size of 0.15-0.30mm), put them into a square iron pan with a size of 32cm×22cm×4.8cm, and spread them flat and compact them. Then measure 500mL of microbial sand-fixing and dust-suppressing agent and evenly spray it on the surface of the sand sample. After the penetration is complete, repeat the spraying of the microbial sand-fixing and dust-suppressing agent. Then put it in an oven (60°C), after drying, place it in front of an industria...

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Abstract

The invention provides a microbial sand-fixing dust depressor and a preparation method thereof. The microbial sand-fixing dust depressor comprises the following components in percentage by mass: 0.8-2.5% of microbial powder, 3.0-5.0% of urea, 8.1-10.1% of calcium chloride and the balance of deionized water, wherein the microorganism in the microbial sand-fixing dust depressor is bacillus pasteurii powder. The preparation method comprises the following steps: proportionally mixing the calcium chloride with the deionized water, stirring till the calcium chloride is completed dissolved, adding the urea, and after the urea is dissolved, adding the bacillus pasteurii powder till the bacillus pasteurii powder is completely dissolved, thereby obtaining a mixed solution, namely the microbial sand-fixing dust depressor. Compared with the traditional inorganic sand-fixing agent, the microbial sand-fixing dust depressor is high in permeability; compared with the traditional organic sand-fixing agent, the microbial sand-fixing dust depressor has the characteristics of high ageing resistance, simplicity in preparation, convenience in construction and the like. Proved by desert sample tests, the sand-fixing dust depressor is high in ageing resistance and wind erosion resistance and has unconfined compressive strength higher than 1MPa. Proved by raise dust sample tests, the sand-fixing dust depressor has a good dust fixing effect.

Description

technical field [0001] The invention belongs to the technical fields of sand prevention and sand fixation and environmental pollution control. The invention relates to a microbial sand-fixing and dust-suppressing agent, specifically a novel microbial sand-fixing and dust-suppressing agent compounded with microorganisms and substrates. Microbial sand fixation and dust suppression agent is suitable for slope ecological protection of loose sand, soil and other granular slopes, prevention and control of soil wind erosion, desertification control in sandstorm areas, and dust in buildings, roads and other places. Background technique [0002] In recent years, with the accelerated development of land desertification, more and more wind and sand disasters have been caused. At the same time, the dust caused by various basic engineering constructions and human economic activities has caused serious environmental pollution to the atmospheric environment. Currently, there are mainly t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/00C09K3/22C09K105/00
Inventor 钱春香荣辉任立夫
Owner SOUTHEAST UNIV
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