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Magnesium silicate-hydrothermal carbon composite material and its preparation method and application

A composite material, magnesium silicate technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of limited adsorption capacity and poor adsorption effect, and achieve increased specific surface area and effective adsorption site, the effect of improving stability

Active Publication Date: 2020-04-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited adsorption capacity of natural minerals, even after loading hydrothermal carbon, the adsorption effect is still not good.

Method used

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  • Magnesium silicate-hydrothermal carbon composite material and its preparation method and application
  • Magnesium silicate-hydrothermal carbon composite material and its preparation method and application
  • Magnesium silicate-hydrothermal carbon composite material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A magnesium silicate-hydrothermal carbon composite material of the present invention is in the form of black-gray powder macroscopically, including massive porous magnesium silicate and spherical hydrothermal carbon, and the hydrothermal carbon is supported on the surface and pores of the magnesium silicate. , and chemically combined with magnesium silicate. Among them, the particle size of the hydrothermal carbon is 500-1000 nm, and the loading of the hydrothermal carbon is 37% of the mass of the magnesium silicate-hydrothermal carbon composite material. The magnesium silicate-hydrothermal carbon composite material is environmentally friendly, non-toxic, and low in cost. It is not easy to agglomerate, and has a strong adsorption effect on cationic dyes and heavy metals in water.

[0037] A preparation method of the above-mentioned magnesium silicate-hydrothermal carbon composite material, comprising the following steps:

[0038](1) Dissolve 4.5 g of sodium silicate in...

Embodiment 2

[0046] Application 1 of the magnesium silicate-hydrothermal carbon composite material of embodiment 1 in adsorbing methylene blue dye in waste water:

[0047] In three groups of methylene blue aqueous solution (group 1, group 2 and group 3, each group of 5 pieces of 20mL each, the methylene blue concentrations of 5 pieces of each group were 50mg / L, 70mg / L, 85mg / L, 150mg / L, 240mg / L, respectively. L, pH = 5.3), 5 mg of the magnesium silicate-hydrothermal carbon composite material of Example 1 was added respectively, the first group was placed in a constant temperature water bath at 25 °C and 170 rpm for shaking for 24 hours; the second group was placed at 35 °C, The adsorption was completed by shaking in a constant temperature water bath at 170 rpm for 24 hours; the third group was placed in a constant temperature water bath at 45°C and 170 rpm and shaken for 24 hours. After the completion of each group, 10ml of the treated solution was passed through a 0.22μm water filter membr...

Embodiment 3

[0049] Application one of the magnesium silicate-hydrothermal carbon composite material of embodiment 1 in adsorbing cadmium in wastewater:

[0050] In the three groups of cadmium-containing aqueous solutions (group 1, group 2 and group 3, each group of 6 20mL, the cadmium concentration of each group of 6 were 30mg / L, 35mg / L, 40mg / L, 45mg / L, 50mg / L, 55mg / L, pH = 5.3), 5mg of the magnesium silicate-hydrothermal carbon composite material of Example 1 was added respectively, the first group was placed in a constant temperature water bath at 25°C and 170rpm and shaken for 24h; the second group Placed in a constant temperature water bath at 35°C and 170 rpm for 24 hours of shaking; the third group was placed in a constant temperature water bath at 45°C and 170 rpm and shaken for 24 hours to complete the adsorption. After completion, 10 ml of the treated solution in each group was passed through a 0.22 μm aqueous filter membrane, and the content of cadmium in each filtrate was dete...

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Abstract

The invention discloses a magnesium silicate-hydrothermal carbon composite material as well as a preparation method and an application thereof. The magnesium silicate-hydrothermal carbon composite material comprises blocky porous magnesium silicate and spherical porous hydrothermal carbon, wherein hydrothermal carbon is supported in the surface and pores of magnesium silicate. The preparation method comprises the following steps: (1) a magnesium silicate dispersion is prepared; (2) a carbon source and organic acid are added to the magnesium silicate dispersion for a hydrothermal reaction, filtering is performed after the reaction, and a precipitation product is obtained; (3) the precipitation product obtained in the step (2) is added to alkali liquor, so that pore channels blocked by hydrothermal carbon can be broken through, and the magnesium silicate-hydrothermal carbon composite material is obtained after filtering. The magnesium silicate-hydrothermal carbon composite material has the advantages of being environment-friendly, non-toxic, low in cost, not prone to agglomeration and the like and has a strong adsorption effect on cationic dyes and heavy metal in water.

Description

technical field [0001] The invention belongs to the technical field of environmental protection adsorption materials, and in particular relates to a magnesium silicate-hydrothermal carbon composite material and a preparation method and application thereof. Background technique [0002] With the development of economy, environmental problems caused by dyes and heavy metal polluted wastewater in my country are becoming more and more prominent. Most dyes have strong chemical stability and biodegradability, so they can exist in water for a long time and cause serious environmental pollution. It is enriched, so it is difficult to degrade in the environment, and at the same time, it enters the human body through various ways to endanger human beings. Dyes can also synergize with heavy metals (such as cadmium) ubiquitous in the environment to form compound pollution, and even form water-soluble substances that are difficult to volatilize and biodegrade, resulting in their long-ter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30C02F101/20
CPCB01J20/223B01J20/28061C02F1/285C02F2101/20C02F2101/308
Inventor 袁兴中熊婷陈晓红吴志斌王惠蒋龙波谢沅沅肖景峰
Owner HUNAN UNIV
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