Preparation method of KOH-microwave activated corncob activated carbon for treating cationic dye-containing wastewater
A cationic dye and microwave activation technology is applied in the field of preparation of KOH-microwave activated corncob activated carbon, which can solve the problems that the adsorption performance of cations and organic pollutants needs to be improved, and achieve the effects of shortening preparation time, simple preparation process and low cost.
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Embodiment 1
[0025] A preparation method of KOH-microwave activated corncob activated carbon for treating cationic dye wastewater, the steps are as follows:
[0026] (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.
[0027] (2) Add 5 g of corncob powder into 100 mL of KOH solution with a mass fraction of 10 wt %, stir and mix evenly.
[0028] (3) The mixture obtained in step (2) was placed in a 250mL round-bottomed flask, and after adding a magnet, it was refluxed in a constant temperature water bath at 80°C for 5h. After the reflux was completed, the mixture was placed in a vacuum drying oven and ...
Embodiment 2
[0035] A preparation method of KOH-microwave activated corncob activated carbon for treating cationic dye wastewater, the steps are as follows:
[0036] (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.
[0037] (2) Add 5 g of corncob powder into 100 mL of KOH solution with a mass fraction of 10 wt %, stir and mix evenly.
[0038] (3) The mixture obtained in step (2) was placed in a 250mL round-bottomed flask, and after adding a magnet, it was refluxed in a constant temperature water bath at 80°C for 5h. After the reflux was completed, the mixture was placed in a vacuum drying oven and ...
Embodiment 3
[0045] A preparation method of KOH-microwave activated corncob activated carbon for treating cationic dye wastewater, the steps are as follows:
[0046](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.
[0047] (2) Add 5 g of corncob powder into 100 mL of KOH solution with a mass fraction of 10 wt %, stir and mix evenly.
[0048] (3) The mixture obtained in step (2) was placed in a 250mL round-bottomed flask, and after adding a magnet, it was refluxed in a constant temperature water bath at 80°C for 5h. After the reflux was completed, the mixture was placed in a vacuum drying oven and d...
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