Porous carbon ceramic as well as preparation method and application thereof
A technology of porous carbon and ceramics, which is applied in the field of porous carbon ceramics and its preparation, which can solve the problems of resource waste and easy environmental problems, and achieve good adsorption effect and large mesopores
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Embodiment 1
[0024] Preparation of Example 1 Porous Carbon Ceramics
[0025] 1) Pretreatment of waste powdered activated carbon: crush waste powdered activated carbon through a pulverizer, select activated carbon powder with a particle size of less than 0.12mm, and dry at 200°C for 15 minutes.
[0026] 2) Attapulgite pretreatment: drying the attapulgite at 200° C. for 15 minutes.
[0027] 3) Preparation of porous carbon ceramics: by mass ratio, m 活性炭 :m 凹凸棒 =1:0.25 Take the waste powdered activated carbon powder and attapulgite and mix them evenly, then knead them through a kneader, and then compress them through hydraulic equipment to form a carbon ceramic columnar green body; the carbon ceramic green body is dried in a muffle furnace , the drying temperature is 105°C, and the drying time is 10min; sintering is carried out in a muffle furnace, the sintering temperature is 800°C, and the sintering time is 1.5h, thereby obtaining columnar porous carbon ceramics.
Embodiment 2
[0028] Application of Example 2 Porous Carbon Ceramics in Adsorption of Humic Acid in Wastewater
[0029] First prepare humic acid into a solution with a concentration of 0.5mol / L, then pipette 100mL of the solution into an iodine measuring bottle with a ground stopper, and adjust the pH of the solution to 7 by using HCl and NaOH with a concentration of 0.1mol / L. Put 0.1 g of the dried columnar porous carbon ceramics (1-2 cm) prepared in Example 1 into an iodine flask, and shake it in a constant temperature shaking bed in a water bath at 50° C. for 20 minutes before taking it out. Take the upper layer solution in a 50mL colorimetric tube, and measure its absorbance value at a wavelength of 264nm. Calculate the concentration of humic acid according to the standard curve of humic acid solution, and then calculate the humic acid adsorption capacity of carbon ceramics.
[0030] Calculated as follows:
[0031] q e =(C 0 -C e )V / M
[0032] where: q e Equilibrium adsorption ca...
Embodiment 3
[0034] Determination of the amount of binder in the preparation process of embodiment 3 porous carbon ceramics
[0035] Preparation conditions of porous carbon ceramics: set the mass ratio of attapulgite and waste powdery activated carbon to 0.1:1, 0.25:1, 0.5:1, 0.75:1, 1:1 respectively, and the rest of the steps are the same as in Example 1. Porous carbon ceramics with different binders were obtained.
[0036] Prepare humic acid into a solution with a concentration of 0.5 mol / L, then pipette 100 mL of the solution into an iodine flask with a ground stopper, and adjust the pH of the solution to 7 with HCl and NaOH with a concentration of 0.1 mol / L, and put Put 0.1 g of dry columnar carbon ceramics (1-2 cm) with different binder dosages into an iodine flask, shake in a water bath constant temperature oscillating bed at 50°C for 20 min, and then take it out. Take the upper layer solution in a 50mL colorimetric tube, and measure its absorbance value at a wavelength of 264nm.
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