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Fly ash-based layered adsorption material as well as preparation method and application thereof

An adsorption material and fly ash technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of silicon and aluminum waste, aluminum can not be used efficiently, etc. Achieve the effect of increasing specific surface area, increasing specific surface area, and large specific surface area

Pending Publication Date: 2021-11-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes silicon and aluminum in fly ash unable to be efficiently utilized, resulting in a large amount of waste of silicon and aluminum

Method used

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  • Fly ash-based layered adsorption material as well as preparation method and application thereof
  • Fly ash-based layered adsorption material as well as preparation method and application thereof
  • Fly ash-based layered adsorption material as well as preparation method and application thereof

Examples

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preparation example Construction

[0024] A kind of preparation method of fly ash-based layered adsorption material of the present invention comprises the following steps:

[0025] Step 1: first take a certain amount of fly ash, wash, dry, grind and pass through a 150-mesh sieve in sequence to obtain fly ash with uniform particle size.

[0026] Step 2: Dissolve 5-15g of fly ash with uniform particle size in 0.5-3mol / L, 15-50mL of sodium silicate solution, and stir thoroughly for 2 hours so that the fly ash can fully to dissolve.

[0027] Step 3: Then add 1 to 5 mol / L, 15 to 50 mL of zinc acetate solution into the mixed solution, then transfer the obtained mixed system to a high-pressure reaction axe, and conduct hydrothermal heating at a temperature of 100 to 200 ° C for 12 to 18 Hours, the nano-scale reticular fly ash-based porous adsorption material is finally obtained.

[0028] The adsorption material can be used for the purification of domestic sewage through adsorption. First prepare a series of methylen...

Embodiment 1

[0030] A kind of preparation method of fly ash-based layered adsorption material of the present invention comprises the following steps:

[0031] Step 1: first take a certain amount of fly ash, wash, dry, grind, and pass through a 150-mesh sieve to obtain fly ash with uniform particle size for use.

[0032] Step 2: Take 5g of fly ash and dissolve it in 0.5mol / L, 15mL sodium silicate solution, and stir it sufficiently so that the fly ash can be fully dissolved.

[0033] Step 3: Then add 1mol / L, 15mL zinc acetate solution to the mixed solution, then transfer the mixed solution to a high-pressure reaction axe, conduct hydrothermal heating at 100°C for 12 hours, and finally obtain nanoscale pulverized coal Ash-based layered absorbent material.

[0034] Such as figure 1 As shown, the mixed solution formed a lamellar structure after hydrothermal heating, which increased the specific surface area of ​​the material, enabling it to increase its contact with methylene blue, thereby in...

Embodiment 2

[0040] A kind of preparation method of fly ash-based layered adsorption material of the present invention comprises the following steps:

[0041] Step 1: first take a certain amount of fly ash, wash, dry, grind, and pass through a 150-mesh sieve to obtain fly ash with uniform particle size for use.

[0042] Step 2: Take 7g of fly ash and dissolve it in 1mol / L, 20mL sodium silicate solution, and stir it sufficiently so that the fly ash can be fully dissolved.

[0043] Step 3: Then add 2mol / L, 15mL zinc acetate solution to the mixed solution, then transfer the mixed solution to a high-pressure reaction axe, conduct hydrothermal heating at 120°C for 12 hours, and finally obtain nanoscale pulverized coal Ash-based layered absorbent material.

[0044] The adsorption material is mainly used for the purification of domestic sewage, and a methylene blue solution with a concentration of 18mg / L is prepared, and then 50mL of methylene blue solution is added to the test tube, and then th...

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Abstract

The invention provides a fly ash-based layered adsorption material and a preparation method and application thereof. The method comprises the following steps: uniformly mixing fly ash and a sodium silicate solution, adding a zinc acetate solution into the obtained mixed solution with a ratio of the fly ash to sodium silicate in the sodium silicate solution to zinc acetate in the zinc acetate solution being (5-15) g: (7.5-150) mmol: (15-250) mmol to obtain a mixed system; and carrying out hydrothermal reaction on the mixed system at 100-200 DEG C, separating the precipitate in the obtained reaction liquid, and drying to obtain the fly ash-based layered adsorption material. As the fly ash contains more silicon dioxide and aluminum oxide, the silicon dioxide and the aluminum oxide can be decomposed into small molecules through the alkali excitation effect of sodium silicate, and then the small molecules are recombined in the hydrothermal reaction to form a certain network structure.

Description

technical field [0001] The invention relates to the field of sewage treatment by adsorption technology, in particular to a fly ash-based adsorption material, a preparation method and application thereof. Background technique [0002] At present, my country's demand for electricity is increasing. Although a variety of new power generation methods have been developed and utilized, they are far from meeting my country's demand for electricity. At present, the most important thing is thermal power generation, so a large amount of fly ash is produced every year. [0003] Fly ash is a material with relatively high silicon content and aluminum content. Currently, it is most commonly used as building materials and agricultural fertilizers. This makes silicon and aluminum in fly ash unable to be efficiently utilized, resulting in a large amount of waste of silicon and aluminum. Contents of the invention [0004] Aiming at the problems existing in the prior art, the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/22B01J20/28033C02F1/285C02F2101/308
Inventor 杨艳玲李道辉侯小江和茹梅孙宜孟张荔叶晓慧郭文宁冯雷刘佳隽锁国权薛帆
Owner SHAANXI UNIV OF SCI & TECH
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