Preparation method of sludge-based active carbon adsorbent
An activated carbon adsorption and activated carbon technology is applied in the preparation of sludge-based activated carbon adsorbents and in the field of activated carbon preparation, which can solve the problems of limited use and high cost of commercial activated carbon, and achieve the effects of easy availability, low price and simple method.
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Embodiment 1
[0018] A preparation method of sludge-based activated carbon adsorbent, its specific preparation method comprises the following steps:
[0019] (1) Dry the municipal dewatered sludge from Kunming No. 7 Water Purification Plant in a drying oven at 105°C for 24 hours until the moisture content of the dried sludge is 9.3%, and then cool it naturally to room temperature;
[0020] (2) Grind the dry sludge obtained in step (1) to 40 mesh, wash it twice with distilled water until the supernatant has no turbidity suspended, and dry at 100°C for 6 hours;
[0021] (3) Put the dried sludge particles in step (2) into the tube furnace, and inject N at a flow rate of 20 mL / min. 2 gas, roasting at 400°C for 1 hour to obtain carbonized sludge particles;
[0022] (4) Put the carbonized sludge particles obtained in step (3) in 3 mol / L ZnCl 2 Ultrasonic immersion in the solution for 1h, drying at 100°C for 6h, and naturally cooling to room temperature;
[0023] (5) Put the material obtained i...
Embodiment 2
[0027] A preparation method of sludge-based activated carbon adsorbent, its specific preparation method comprises the following steps:
[0028] (1) Dry the municipal dewatered sludge from Kunming No. 7 Water Purification Plant in a drying oven at 105°C for 36 hours until the moisture content of the dried sludge is 8.6%, and then cool naturally to room temperature;
[0029] (2) Grind the dry sludge obtained in step (1) to 40 mesh, wash with distilled water for 3 times until the supernatant has no turbid suspension, and dry at 120°C for 4 hours;
[0030] (3) Put the dried sludge particles in step (2) into the tube furnace, and inject N at a flow rate of 20 mL / min. 2 gas, roasting at 700°C for 1 hour to obtain carbonized sludge particles;
[0031] (4) Put the carbonized sludge particles obtained in step (3) in 3mol / L ZnCl 2 Ultrasonic immersion in the solution for 1h, drying at 110°C for 6h, and naturally cooling to room temperature;
[0032] (5) Put the material obtained in s...
Embodiment 3
[0036] A preparation method of sludge-based activated carbon adsorbent, its specific preparation method comprises the following steps:
[0037] (1) Dry the municipal dewatered sludge from Kunming No. 7 Water Purification Plant in a drying oven at 105°C for 24 hours until the moisture content of the dried sludge is 9.3%, and then cool it naturally to room temperature;
[0038](2) Grind the dry sludge obtained in step (1) to 60 mesh, wash with distilled water for 3 times until the supernatant has no turbid suspension, and dry at 100°C for 6 hours;
[0039] (3) Put the dried sludge particles in step (2) into the tube furnace, and inject N at a flow rate of 20 mL / min. 2 gas, roasting at 400°C for 1 hour to obtain carbonized sludge particles;
[0040] (4) Put the carbonized sludge particles obtained in step (3) in 2 mol / L ZnCl 2 Ultrasonic immersion in the solution for 1h, drying at 110°C for 6h, and naturally cooling to room temperature;
[0041] (5) Put the material obtained i...
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