Adsorbing material for removing lead, copper and cadmium in underground water and preparation method and application thereof
The technology of adsorption material and composite adsorption material is applied in the field of adsorption material of lead, copper and cadmium in groundwater and the field of preparation thereof, which can solve the problems of reducing material production cost and difficulty in recycling the adsorbent, and achieves wide applicability, high adsorption efficiency, and high production efficiency. simple craftsmanship
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Embodiment 1
[0013] The corn cobs were crushed to 100 mesh, dried, and appropriate amount of powder was put into a muffle furnace, roasted at 600°C for 2 hours, and after naturally cooling down to room temperature, the resulting biochar was ground to 100 mesh to obtain biochar. Chitosan is added to 5% glacial acetic acid containing 250ml, placed in a water bath at 30°C and stirred for 1 hour; 5g of 2-pyrrole formaldehyde is then added, the water bath is slowly raised to 70°C, and stirred at a constant temperature for 7 hours; Add 5g of biochar prepared before to the solution, and continue to stir for 1.5h, and finally add 5g of Fe 3 o 4, After stirring at 25 °C for 1 h, slowly drop the mixed solution into 1 mol / L NaOH solution using a syringe to form black pellets. After soaking for 20 min, wash repeatedly, and then dry them in an oven at 60 °C for 24 h, and store them for later use.
[0014] Weigh 0.5 g of the chitosan-modified magnetic biochar composite adsorbent prepared above, place i...
Embodiment 2
[0017] The corn cobs were crushed to 100 mesh, dried, and appropriate amount of powder was put into a muffle furnace, roasted at 600°C for 2 hours, and after naturally cooling down to room temperature, the resulting biochar was ground to 100 mesh to obtain biochar. Chitosan is added to 5% glacial acetic acid containing 250ml, placed in a water bath at 30°C and stirred for 1 hour; 5g of 2-pyrrole formaldehyde is then added, the water bath is slowly raised to 70°C, and stirred at a constant temperature for 7 hours; Add 5g of biochar prepared before to the solution, and continue to stir for 1.5h, and finally add 5g of Fe 3 o 4 , After stirring at 25°C for 1 hour, use a syringe to slowly drop the mixed solution into 1mol / L NaOH solution to form a black ball, soak for 20 minutes, wash repeatedly, and then dry it in an oven at 60°C for 24 hours, store it for later use .
[0018] Weigh 0.5 g of the chitosan-modified magnetic biochar composite adsorbent prepared above, place it in a...
Embodiment 3
[0021] Peanut shells were crushed to 100 mesh, after drying, an appropriate amount of powder was put into a muffle furnace, roasted at 400°C for 2 hours, and after naturally cooling down to room temperature, the obtained biochar was ground to 100 mesh to obtain biochar. Chitosan is added to 5% glacial acetic acid containing 250ml, placed in a water bath at 30°C and stirred for 1 hour; 5g of 2-pyrrole formaldehyde is then added, the water bath is slowly raised to 70°C, and stirred at a constant temperature for 7 hours; Add 5g of biochar prepared before to the solution, and continue to stir for 1.5h, and finally add 5g of Fe 3 o 4 , After stirring at 25°C for 1 hour, use a syringe to slowly drop the mixed solution into 1mol / L NaOH solution to form a black ball, soak for 20 minutes, wash repeatedly, and then dry it in an oven at 60°C for 24 hours, store it for later use .
[0022] Weigh 1.0 g of the chitosan-modified magnetic biochar composite adsorbent prepared above, place it...
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