Biochar modified montmorillonite and preparation method thereof

A technology of montmorillonite and biochar, applied in the direction of chemical instruments and methods, restoration of water pollutants, and polluted soil, etc., can solve the problems that the performance of ordinary montmorillonite cannot fully meet the application requirements, achieve high strength, improve The effect of service life and high water permeability coefficient

Active Publication Date: 2019-03-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the performance of ordinary montmorillonite can not fully meet the application requirements, so it needs to be further modified

Method used

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  • Biochar modified montmorillonite and preparation method thereof

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preparation example Construction

[0018] The preparation method of the strengthening modifier is to fully mix and stir 40-55 parts of biochar, 15-20 parts of white carbon black, 15-20 parts of hollow glass microspheres and 15-20 parts of mica powder, and then add calcined Heating in a furnace, calcining at 400-500°C for 30-50 minutes, and then slowly cooling to room temperature.

[0019] According to the above embodiments, the modified montmorillonite prepared by modifying ordinary montmorillonite has the characteristics of higher strength, larger porosity and high water permeability than ordinary montmorillonite, and can be widely used in polluted soil In the field of body restoration, the service life of montmorillonite is greatly improved, and economic benefits are enhanced. The added strengthening modifier can significantly increase the number of oxygen-containing groups of the montmorillonite, make the final product have a stable micropore structure, and enhance the adsorption capacity of pollutants. The...

Embodiment 1

[0030] Components and content: 70g of ordinary montmorillonite, 5g of modified calcium oxide, 2g of modified red mud, 2g of sodium carboxymethyl cellulose, 2g of bauxite, 3g of polyacrylate and 2g of strengthening modifier.

[0031] Wherein, the strengthening modifier consists of 40g of biochar, 15g of white carbon black, 15g of hollow glass microspheres and 15g of mica powder.

[0032] The modified calcium oxide is prepared by mixing 50g of quicklime, 1g of trehalose powder and 3g of aluminum sulfate powder and stirring evenly, heating to 45°C and keeping it for 2 hours, and then cooling to room temperature. The modified red mud is prepared by mixing 60g of red mud and 3g of phosphogypsum thoroughly, heating to 600°C and keeping it for 2 hours, and then cooling to room temperature.

[0033] Preparation:

[0034] Step 1: Mix and grind the modified calcium oxide, modified red mud and bauxite to obtain mixture A; the grinding time is 25 minutes.

[0035] Step 2: Add sodium ca...

Embodiment 2

[0038] Components and content:

[0039] Ordinary montmorillonite 80g, modified calcium oxide 8g, modified red mud 4g, sodium carboxymethyl cellulose 4g, bauxite 3g, polyacrylate 5g and strengthening modifier 3g.

[0040] The strengthening modifier consists of 50g of biochar, 18g of white carbon black, 18g of hollow glass microspheres and 18g of mica powder.

[0041] The modified calcium oxide is prepared by mixing 55g of quicklime, 1.5g of trehalose powder and 4g of aluminum sulfate powder and stirring evenly, heating to 45°C and keeping it for 2 hours, and then cooling to room temperature.

[0042] The modified red mud is prepared by mixing 65g of red mud and 4g of phosphogypsum thoroughly, heating to 600°C and keeping it for 2 hours, and then cooling to room temperature.

[0043] Preparation:

[0044] Step 1: Mix and grind the modified calcium oxide, modified red mud and bauxite to obtain mixture A; the grinding time is 25 minutes.

[0045]Step 2: Add sodium carboxymet...

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Abstract

The invention relates to biochar modified montmorillonite and a preparation method thereof. Through being metered in parts by mass, the modified montmorillonite is prepared from the following ingredients including 70 to 90 parts of ordinary montmorillonite, 5 to 10 parts of modified calcium oxide, 2 to 5 parts of modified red mud, 2 to 6 parts of sodium carboxymethylcellulose, 2 to 4 parts of bauxite, 3 to 6 parts of polyacrylate and 2 to 4 parts of reinforced modifying agents; the reinforced modifying agents are prepared from 40 to 55 parts of biochar, 15 to 20 parts of white carbon black, 15to 20 parts of hollow glass microspheres and 15 to 20 parts of mica powder. Through the modification on ordinary montmorillonite, the prepared modified montmorillonite has the characteristics of higher intensity, larger pore rate and higher water permeation coefficient than the ordinary montmorillonite, and can be widely applied to the field of heavy metal adsorption or other polluted soil body restoration; the service life of the montmorillonite is greatly prolonged; the economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of montmorillonite modification, in particular to biochar modified montmorillonite and a preparation method. Background technique [0002] Biochar is a stable and highly aromatic carbon-containing solid substance, which can be synthesized by carbonization and cracking of biomass from agricultural and forestry waste such as animals and plants. It has rich pore structure, large specific surface area, and relatively high chemical and biological stability. Compared with activated carbon, biochar has the advantages of low cost and wide source of raw materials. Biochar is almost pure carbon, and it will not disappear for hundreds to thousands of years after being buried in the ground. It is equivalent to sequestering carbon into the soil and helping to slow down global warming. It has aroused widespread interest in biochar all over the world. . Using biochar to capture carbon is quite stable and can "lock" carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28B09C1/00C02F101/20
CPCB01J20/12B01J20/3085B09C1/00C02F1/288C02F2101/20
Inventor 史晓凯马娟娟岳秀萍郑利剑
Owner TAIYUAN UNIV OF TECH
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