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Fly ash-based adsorption material utilizing fiber as pore forming agent

An adsorption material and fly ash technology, applied in the field of water treatment, can solve the problems of destroying the ecological environment, occupying farmland, polluting rivers and lakes, etc., and achieve the effect of low price, wide application and large specific surface area

Inactive Publication Date: 2016-01-20
王勇梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of fly ash waste piles up randomly, which will not only occupy farmland, but also cause the fly ash mortar to pollute rivers and lakes due to the erosion of rainwater, block river courses and even pollute groundwater, seriously damaging the ecological environment

Method used

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  • Fly ash-based adsorption material utilizing fiber as pore forming agent
  • Fly ash-based adsorption material utilizing fiber as pore forming agent
  • Fly ash-based adsorption material utilizing fiber as pore forming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a fly ash-based adsorption material using fiber as a pore-forming agent, the steps are as follows:

[0032] 1) Disperse paper sludge to prepare fine fibers, such as figure 1 shown;

[0033] 2) Centrifuge the fiber suspension to remove excess water, such as figure 2 shown;

[0034] 3) Wet mixing: Weigh an appropriate amount of material according to the mass ratio of fly ash and bentonite of 2:1, pour it into the fiber suspension after centrifugal concentration, and mix evenly;

[0035] 4) The mixture is dried in an oven at 80°C to the initial weight of the raw material;

[0036] 5) Grind the dried material to a powder with a diameter of 0.5 mm, and stir to make it evenly mixed, such as image 3 shown;

[0037] 6) After adding an appropriate amount of distilled water to the powdery mixed material, use a particle molding machine to shape the material, such as Figure 4 shown;

[0038] 7) The molded material was left to dry naturally at room ...

Embodiment 2

[0046] Weigh 0.5g of this adsorption material and 0.5g of activated carbon, put them into conical flasks containing 100mL of methylene blue solution with a concentration of 2000mg / L, adjust the pH of the solution to 7 with NaOH or HCl, and place them in a constant temperature shaker , adjust the rotation speed to 120r / min, the temperature to 50°C, sample and filter at the set time of 1h, 3h, 6h, 18h, 22h, 28h, 42h, 48h, 72h, 96h, 120h, 144h and 168h, using UV- The absorbance of the filtrate was measured by a visible spectrophotometer, and the adsorption amount was calculated. The adsorption capacity of activated carbon to methylene blue adsorption saturation reached 256.01 mg / g, and the adsorption capacity of this new adsorption material reached 200.20 mg / g when methylene blue adsorption reached equilibrium.

Embodiment 3

[0048]Weigh 0.2g of this adsorption material and 0.2g of activated carbon, put them into conical flasks containing 100mL of gentian violet solution with a concentration of 1000mg / L, adjust the pH value of the solution to 7 with NaOH or HCl, and place it in a constant temperature shaker In the device, the speed is adjusted to 120r / min, the temperature is 50°C, and the samples are filtered at the set time of 1h, 3h, 6h, 18h, 22h, 28h, 42h, 48h, 72h, 96h, 120h, 144h and 168h, using ultraviolet - Measure the absorbance of the filtrate with a visible spectrophotometer and calculate its adsorption capacity. The adsorption capacity of activated carbon to gentian violet in equilibrium is 230.61 mg / g, and the adsorption capacity of this new adsorption material to gentian violet in equilibrium is 474.27 mg / g.

[0049] In embodiment 2 and embodiment 3, compare the adsorption effect of methylene blue and gentian violet in the dye wastewater with newly prepared adsorbent material and gac, ...

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Abstract

The invention relates to a fly ash-based adsorption material utilizing a fiber as a pore forming agent. Fly ash as aggregate, bentonite as a binder and paper making fibers as pore forming agents are extrusion-molded by a granulator, and then the granules are dried and then are sintered by an atmosphere sintering furnace. The fly ash-based adsorption material has a certain mechanical strength, a wide aperture distribution scope and a large specific surface area and can be used as an adsorption material and be widely used in water treatment. The fly ash-based adsorption material utilizing a fiber as a pore forming agent fully realizes waste recycling, has a low cost and a wide adsorption scope, can be used by simple and easy processes, can be regenerated easily, can be recycled and has a wide application range.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to the preparation of a fly ash-based adsorption material using fiber as a pore-forming agent. Background technique [0002] Fly ash is a solid waste discharged from coal-fired power plants. It is a powdery substance collected by dust collectors when pulverized coal is burned at high temperature in a boiler. According to statistics, in 2011, my country's fly ash discharge was nearly 500 million tons, accounting for about 70% of the national industrial solid waste. Compared with developed countries such as Europe and the United States, there is still a big gap in the development and utilization of fly ash resources in my country. The utilization rate of fly ash in developed countries has reached 90%, while in my country it can only reach about 45%. A large amount of fly ash waste accumulates randomly, which not only occupies farmland, but also pollutes rivers and...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28
Inventor 彭昌盛王勇梅李丹丹张滕杨可袁合涛
Owner 王勇梅
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