Preparation method of eggplant stalk activated carbon
A technology of eggplant straw and activated carbon is applied in the field of preparation of eggplant straw activated carbon, which can solve the problems of environmental pollution, resource waste and the like, and achieve the effects of low corrosiveness, small environmental pollution and wide sources.
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[0024] Example 1
[0025] Select a certain amount of discarded crops of eggplant stalks, wash, dry, and crush to 1 cm. The carbonization is carried out for 30 minutes, the carbonization temperature is 650°C, the KOH:straw mass ratio is 2:1, the activation time is 100 minutes, and the activation temperature is 650°C. It is heated in a heating furnace and then cooled to room temperature and taken out. Then it was soaked in 0.1 mol / L hydrochloric acid, continuously stirred at about 60°C for 1 hour, then washed with hot distilled water to neutrality, dried, and sieved to 200 meshes to obtain powdered eggplant straw activated carbon. The activated carbon prepared under these conditions has an iodine adsorption value of 2038.5mg / g and a methylene blue adsorption value of 41.3mL / 0.1g, which far exceeds the national first-level activated carbon standard for wood water purification (GBT138032-1999, activated carbon for wood water purification. Grade quality indicators: iodine adsorption ...
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[0026] Example 2
[0027] Select a certain amount of discarded crops of eggplant stalks, wash, dry, and crush to 1 cm. After carbonization for 30 minutes, the activation temperature is 700°C, the activation time is 80 minutes, and the carbonization temperature is 450°C. The activator (KOH and NaOH) is used for activation, and the mass ratio of KOH: NaOH: eggplant straw is 3:1:1. It is heated in a heating furnace, and then cooled to room temperature and taken out. Then it was soaked in 0.1 mol / L hydrochloric acid, continuously stirred at 60°C for 1 h, then washed with hot distilled water to neutrality, dried, and sieved to 200 meshes to obtain powdered eggplant straw activated carbon. Activated carbon with an iodine adsorption value of 2356.40mg / g and a methylene blue adsorption value of 42mL / 0.1g can be obtained, which far exceeds the national first-grade activated carbon standard for wooden water purification (GBT138032-1999, the first-grade quality index of activated carbon fo...
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