Method for preparing magnetic adsorption material with silver/multi-walled carbon nano-tubes and application of magnetic adsorption material
A technology of multi-walled carbon nanotubes and adsorption materials, applied in the field of environmental material preparation, can solve the problems of affecting plant growth, affecting soil fertility, and destroying soil micro-ecological systems, achieving large adsorption capacity, increasing adsorption sites, and reducing production costs. low effect
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example 1
[0025] Example 1: Preparation of magnetic silver-loaded / multi-walled carbon nanotube adsorbent
[0026] Weigh 0.5g of multi-walled carbon nanotubes into a four-necked flask, add 100mL of distilled water, cover with a stopper, and ultrasonicate for 10 minutes to obtain a uniformly dispersed suspension of multi-walled carbon nanotubes; weigh 0.882g of ferrous chloride (FeCl 2 4H 2 O) and 1.507g ferric chloride (FeCl 3 ·6H 2 (0) joins in the four-necked flask; The four-necked flask is configured with a condenser, and feeds high-purity N 2 , so that it maintains a nitrogen environment. Put the four-necked flask in an oil bath, stir the mixture with a mechanical stirrer, raise the temperature to 80°C, add 10ml of 25% ammonia water dropwise, and continue to stir for 1h; under constant stirring, weigh 0.015g of AgNO 3 into a four-necked flask, add 10ml of NaNH dropwise 4 , continue to stir the mixed solution for 1 h; cool to room temperature, wash with deionized water and ethano...
example 2
[0027] Example 2: Adsorption thermodynamic process of magnetic silver-loaded / multi-walled carbon nanotube adsorbent
[0028] Prepare a certain concentration of sulfamethoxazole solution with a background solution containing 0.02MNaCl, and adjust the pH of the solution to 5; take 30mL of sulfamethoxazole solution in a 30mL brown bottle, add 15mg of magnetically endowed silver-multi-walled carbon nanotubes for adsorption Put it in a constant temperature oscillator and vibrate at room temperature for 4.0h, take out the brown bottle, separate the adsorbent and the solution with a magnet, take the supernatant and pass it through a 0.45 μm filter membrane, dilute it by a certain number of times, and determine the concentration of sulfamethoxazole by liquid phase concentration. The determination shows that the magnetic silver-imparted multi-walled carbon nanotube adsorbent has an adsorption capacity of 34.5 mg / g for 80 mg / L sulfamethoxazole. According to the initial concentration C0...
example 3
[0029] Example 3: Adsorption of Sulfamethoxazole by Sorbent at Different pH Values
[0030] Prepare a 40mg / L sulfamethoxazole solution with a background solution containing 0.02M NaCl, and adjust the pH of the solution to 2-10; take 30mL of sulfamethoxazole solution in a 30mL brown bottle, add 15mg of magnetic silver- Multi-walled carbon nanotube adsorbent, put it in a constant temperature oscillator and shake it at room temperature for 4.0h, take out the brown bottle, separate the adsorbent and the solution with a magnet, take the supernatant and pass it through a 0.45μm filter membrane, and dilute it 20 times before the liquid phase Determine the concentration of SMX. The optimum pH of sulfamethoxazole by the magnetic silver-endowed-multi-walled carbon nanotube adsorbent is determined to be 4.
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