Composite adsorbent containing flyash and its preparation method

A composite adsorption and fly ash technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve problems such as difficulties, difficult industrial utilization, and inability to install columns for operation and separation, so as to overcome separation difficulties and achieve good mechanical strength Effect

Inactive Publication Date: 2008-04-16
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 ultra-fine fly ash. The mass ratio of fly ash to steel balls is 1:4, and the speed is 300r / min. Take 20 g of ultra-fine fly ash, add 80 ml of 15% NaOH solution, and 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, and the product was broken after drying.

Embodiment 2

[0015] Take 160g of fly ash and ball mill it on a planetary ball mill for 5 hours to obtain ultra-fine fly ash. The mass ratio of fly ash to steel balls is 1:4, and the speed is 300r / min. Take 20 g of ultra-fine fly ash, add 80 ml of 15% NaOH solution, and 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. It is then treated with 15ml of 0.15% ammonia solution for more than 6 hours, dried and broken into products.

Embodiment 3

[0017] Take 160g of fly ash and ball mill it on a planetary ball mill for 5 hours to obtain ultra-fine fly ash. The mass ratio of fly ash to steel balls is 1:4, and the speed is 300r / min. Weigh 20 g of ultra-fine fly ash, add 80 ml of 15% NaOH solution, and 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 10ml of the solution is reacted, stirred evenly, treated with 15ml of 0.15% ammonia solution for more than 6h, dried and broken 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 purification materials, and relates to a preparation method of a formed fly ash composite adsorbent. Background technique [0002] Fly ash is the waste discharged by the electric field, and its main components are SiO2, Al 2 O 3 , CaO, Fe 2 O 3 And so on, while also containing 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 5000 m 2 / g, has a strong adsorption capacity. It has a certain adsorption and removal effect on heavy metal ions in wastewater, pharmaceutical wastewater, non-ferrous wastewater, and domestic sewage. However, due to the fact that fly ash itself...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/30
Inventor 刘转年
Owner XIAN UNIV OF SCI & TECH
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