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Preparation method of ZnCl2-microwave activated corncob activated carbon for treating basic dye wastewater

A technology for microwave activation and basic dyes, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve problems such as inability to process dyes, and achieve low cost, simple preparation process, and high absorption performance. Effect

Inactive Publication Date: 2021-02-26
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coagulation treatment of printing and dyeing wastewater can achieve a good decolorization effect, but it can only achieve a good decolorization effect on a very limited number of dyes, and cannot treat most of the dyes in printing and dyeing wastewater, so it has certain limitations sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of ZnCl for treating basic dye wastewater 2 -The preparation method of microwave activated corn cob activated carbon, the steps are as follows:

[0027] (1) Wash the corn cob with distilled water. Then, it is dried in a constant temperature blast drying oven. Next, take the dried corncobs and crush them with a pulverizer and pass them through a 50-mesh sieve, spread the sieved corncob powder evenly in a vacuum drying oven, and dry them at 60°C for 24 hours to remove the moisture of the raw materials . Finally, the dried corncob powder is collected and placed in a desiccator for future use.

[0028] (2) 5g of corn cob powder is added to 100mL of ZnCl with a mass fraction of 10wt%. 2 solution, stir and mix well.

[0029] (3) The mixture obtained in step (2) was placed in a 250 mL round-bottomed flask, and after adding a magnet, it was refluxed in a constant temperature water bath at 100° C. for 5 h. After the reflux was completed, the mixture was placed in a ...

Embodiment 2

[0036] A kind of ZnCl for treating basic dye wastewater 2 -The preparation method of microwave activated corn cob activated carbon, the steps are as follows:

[0037] (1) Wash the corn cob with distilled water. Then, it is dried in a constant temperature blast drying oven. Next, take the dried corncobs and crush them with a pulverizer and pass them through a 50-mesh sieve, spread the sieved corncob powder evenly in a vacuum drying oven, and dry them at 60°C for 24 hours to remove the moisture of the raw materials . Finally, the dried corncob powder is collected and placed in a desiccator for future use.

[0038] (2) 5g of corn cob powder is added to 100mL of ZnCl with a mass fraction of 10wt%. 2 solution, stir and mix well.

[0039] (3) The mixture obtained in step (2) was placed in a 250 mL round-bottomed flask, and after adding a magnet, it was refluxed in a constant temperature water bath at 100° C. for 5 h. After the reflux was completed, the mixture was placed in a ...

Embodiment 3

[0046] A kind of ZnCl for treating basic dye wastewater 2 -The preparation method of microwave activated corn cob activated carbon, the steps are as follows:

[0047] (1) Wash the corn cob with distilled water. Then, it is dried in a constant temperature blast drying oven. Next, take the dried corncobs and crush them with a pulverizer and pass them through a 50-mesh sieve, spread the sieved corncob powder evenly in a vacuum drying oven, and dry them at 60°C for 24 hours to remove the moisture of the raw materials . Finally, the dried corncob powder is collected and placed in a desiccator for future use.

[0048] (2) 5g of corn cob powder is added to 100mL of ZnCl with a mass fraction of 10wt%. 2 solution, stir and mix well.

[0049] (3) The mixture obtained in step (2) was placed in a 250 mL round-bottomed flask, and after adding a magnet, it was refluxed in a constant temperature water bath at 100° C. for 5 h. After the reflux was completed, the mixture was placed in a ...

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Abstract

The invention relates to a preparation method of ZnCl2-microwave activated corncob activated carbon for treating basic dye wastewater. The preparation method comprises the following steps: step 1, pretreating raw materials; step 2, weighing the raw materials; step 3, performing heating reflux; step 4, performing microwave activation; step 5, washing and filtering; step 6, drying; and step 7, cooling and storing. The prepared activated carbon has a large number of micropore structures, the pore size distribution is uniform, the surface contains rich oxygen-containing functional groups, dye molecules can be attached and deposited on the activated carbon adsorbent easily, and the activated carbon is more suitable for adsorption. The removal rate of methylene blue dye can reach 99.9% at most,the maximum adsorption capacity can reach 440.5 mg / g, the product can be used for treating wastewater containing basic dye, and the adsorbent is simple in preparation process, low in cost, environmentally friendly and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a ZnCl solution for treating basic dye wastewater 2 -The preparation method of microwave activated corn cob activated carbon. Background technique [0002] Almost every industry uses dyes to color their products, and the surplus and unused dyes are released into the environment. Since the main components of dyes in printing and dyeing industrial wastewater are aromatic heterocyclic compounds, the structure is complex and stable, and it is difficult to degrade, causing great pollution to the environment, and will have a great impact on the normal operation of wastewater structures. Therefore, when wastewater is discharged to public Removal of this dye prior to water supply is a major concern today. [0003] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/20C02F1/283C02F2101/308
Inventor 韦会鸽周登凤李岱原王晖崔大鹏
Owner TIANJIN UNIV OF SCI & TECH
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