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Composite adsorbent contg. flyash and its prepn. method

A composite adsorption and fly ash technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve problems such as difficulty, difficult industrial utilization, and inability to run separation in columns, to overcome difficulty in separation and improve mechanical strength. Effect

Inactive Publication Date: 2007-01-31
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that fly ash itself is fine particles and its adsorption performance is not ideal, it cannot be packed into a column and it is difficult to separate, so it is difficult to be used industrially.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 160g of fly ash and ball mill it on a planetary ball mill for 5 hours to obtain superfine fly ash. The mass ratio of fly ash to steel ball is 1:4, and the rotation speed is 300r / min. Take 20g of superfine fly ash, add 80ml of 15% NaOH solution, place it on a constant temperature magnetic stirrer at 100°C and stir until the reactant is pitch-like. Add 10% H 2 SO 4 5ml of the solution was reacted for 2 hours, dried and crushed to obtain the product.

Embodiment 2

[0015] Take 160g of fly ash and ball mill it on a planetary ball mill for 5 hours to obtain superfine fly ash. The mass ratio of fly ash to steel ball is 1:4, and the rotation speed is 300r / min. Take 20g of superfine fly ash, add 80ml of 15% NaOH solution, place it on a constant temperature magnetic stirrer at 100°C and stir until the reactant is pitch-like. Add 10% H 2 SO 4 5ml of the solution was reacted for 2h. Finally, it was treated with 15ml of 0.15% ammonia solution for more than 6 hours, dried and crushed to obtain the product.

Embodiment 3

[0017] Take 160g of fly ash and ball mill it on a planetary ball mill for 5 hours to obtain superfine fly ash. The mass ratio of fly ash to steel ball is 1:4, and the rotation speed is 300r / min. Weigh 20g of superfine fly ash, add 80ml of 15% NaOH solution, place on a constant temperature magnetic stirrer at 100°C and stir until the reactant is pitch-like. Add 10% H 2 SO 4 10ml of the solution was reacted, stirred evenly, treated with 15ml of 0.15% ammonia solution for more than 6 hours, dried and crushed to obtain the product.

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Abstract

A composite adsorbent for adsorbing the organic and inorganic pollutants from aqueous solution is prepared from powdered coal ash through ball grinding, adding NaOH solution, magnetic stirring while reacting, adding H2SO4 solution, reacting while stirring, treating with ammonia water, baking and pulverizing.

Description

technical field [0001] The invention belongs to the field of waste water treatment and purification materials, and relates to a preparation method of a molded fly ash composite adsorbent. Background technique [0002] Fly ash is the waste discharged from the electric field, and its main component is SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 etc., and also contain a small amount of other substances. Fly ash is composed of many particles with different structures and shapes. The particle size of a single fly ash particle is about 25-300 μm, and the average geometric particle size is 40 μm. The porosity is generally 60% to 75%. Fly ash has a porous structure, the porosity is generally 60% to 75%, and the specific surface area is generally 2500 to 5000m 2 / g, has a strong adsorption capacity. It has a certain adsorption and removal effect on heavy metal ions in wastewater, pharmaceutical wastewater, colored wastewater, and domestic sewage. However, due to ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30
Inventor 刘转年
Owner XIAN UNIV OF SCI & TECH
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