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Magnesium silicate-hydrothermal carbon composite material as well as preparation method and application thereof

A composite material, magnesium silicate technology, used in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of limited adsorption capacity and poor adsorption effect, and achieve increased specific surface area and increased adsorption efficiency. The effect of site, enriched pore structure

Active Publication Date: 2017-08-18
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 as well as preparation method and application thereof
  • Magnesium silicate-hydrothermal carbon composite material as well as preparation method and application thereof
  • Magnesium silicate-hydrothermal carbon composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A magnesium silicate-hydrothermal carbon composite material of the present invention, which 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 magnesium silicate , and chemically combined with magnesium silicate. Among them, the particle size of the hydrothermal carbon is 500-1000nm, and the loading capacity 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 reunite, and has a strong adsorption effect on cationic dyes and heavy metals in water.

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

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

Embodiment 2

[0046] Application of the magnesium silicate-hydrothermal carbon composite material of embodiment 1 in the adsorption of methylene blue dye in wastewater one:

[0047] In the three groups of methylene blue aqueous solutions (group 1, group 2 and group 3, each 20mL of 5, each group of 5 methylene blue concentrations were 50mg / L, 70mg / L, 85mg / L, 150mg / L, 240mg / L L, pH = 5.3), respectively added 5 mg of the magnesium silicate-hydrothermal carbon composite material of Example 1, the first group was placed in a constant temperature water bath at 25 ° C and 170 rpm for 24 h; Shake in a constant temperature water bath at 170rpm for 24h; place the third group in a constant temperature water bath at 45°C and 170rpm and shake for 24h to complete the adsorption. After the completion, each group took 10ml of the treated solution and passed it through a 0.22μm water filter membrane, and each filtrate was measured at a wavelength of 665nm by ultraviolet absorptiometry. Adsorption amount of...

Embodiment 3

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

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

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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 its preparation method and application. Background technique [0002] With the development of the economy, the environmental problems caused by dye and heavy metal polluted wastewater in our country are becoming increasingly prominent. Most dyes have strong chemical stability and biodegradability, so they can exist in water for a long time and cause serious environmental pollution. Heavy metals will not be purified through the physical, chemical or biological effects of nature itself. It is enriched, so it is difficult to degrade in the environment, and at the same time, it enters the human body through various methods and causes human beings to be harmed. Dyes can also have a synergistic effect with heavy metals (such as cadmium) that are ubiquitous in the environme...

Claims

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Application Information

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Patent Type & Authority Applications(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