Method for synergistically preparing magnetic porous carbon composite adsorption material from multiple solid wastes
A composite adsorption material and porous carbon technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of product clogging pores and increasing costs, and achieve improved resource utilization and added value Effect
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Embodiment 1
[0033] The sludge produced by a sewage treatment plant in Tianjin Binhai New Area, the wheat straw around Tianjin and the steel slag produced by a steel plant in Tianjin were selected as raw materials. The main components are shown in Table 1.
[0034]After the sludge was centrifuged at 10,000rpm for 10min, dehydrated and dried by a high-speed centrifuge, the sludge was added to the PTFE ball mill in a mass ratio of 5:5:1 with straw and steel slag, and a 3mol / L KOH solution was prepared. Ball mill tank, solid-liquid ratio 1:4, use planetary ball mill for mixing and grinding for 2h, speed 2000rpm / min, material-to-ball ratio 1:4. The slurry obtained after grinding was dried, and then put into a porcelain boat and heated to 700 °C in a tube furnace and kept for 2 hours, during which nitrogen protection was continuously introduced. Finally, the carbonized product was soaked in 1 mol / L dilute hydrochloric acid for 2 h, then washed with deionized water until neutral, and dried to ob...
Embodiment 2
[0037] The sludge produced by a sewage treatment plant in Binhai New Area, Tianjin (same as Example 1), peanut shells around Tianjin, and iron tailings produced by a mine in Hebei Province were selected as raw materials. The main components are shown in Table 1.
[0038] Sludge passes through a high-speed centrifuge. The sludge is centrifuged at 10,000 rpm for 10 minutes, dehydrated and dried, and then added to the PTFE ball mill in a mass ratio of 2:1:2 with peanut shells and iron tailings. Prepare 2 mol / L KOH solution and add it to the ball mill, with a solid-liquid ratio of 1:3, and use a planetary ball mill for mixing and grinding for 4 hours, with a rotational speed of 1500 rpm / min and a material-to-ball ratio of 1:4. The slurry obtained after grinding was dried, and then put into a porcelain boat and heated to 600°C in a tube furnace for 2 hours, during which nitrogen protection was continuously introduced. Finally, the carbonized product was soaked in 1 mol / L dilute hyd...
Embodiment 3
[0040] The sludge produced by a sewage treatment plant in Binhai New Area, Tianjin (same as Example 1), the bagasse produced in Tianjin, and the pulverized slag produced by a steel plant in Tianjin were selected as raw materials, and the main components are shown in Table 1.
[0041] Sludge passes through a high-speed centrifuge. The sludge is centrifuged for 10 minutes at a high-speed centrifuge at 10,000 rpm, dehydrated and dried, and then added to the PTFE ball mill tank with bagasse and pulverized slag in a mass ratio of 1:2:1 to prepare 4mol / L KOH solution was added to the ball mill tank, the solid-liquid ratio was 1:5, and the planetary ball mill was used for mixing and grinding for 5h, the rotational speed was 1000rpm / min, and the material-to-ball ratio was 1:4. The slurry obtained after grinding was dried, and then put into a porcelain boat and heated to 550°C in a tube furnace for 2 hours, during which nitrogen protection was continuously introduced. Finally, the carb...
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