Magnetic aerobic particle sludge-graphene oxide-multiwalled carbon nanotube composite adsorbent preparation and application thereof
A technology of aerobic granular sludge and multi-walled carbon nanotubes, which can be applied to alkali metal compounds, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of simple preparation process, great application prospects and efficient removal
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[0020] Example 1 Preparation method of magnetic aerobic granular sludge-graphene oxide-multi-wall carbon nanotube composite adsorbent
[0021] (1) Preparation of aerobic granular sludge powder: the aerobic granular sludge cultured in the laboratory SBR reactor is washed with ultrapure water for 3 to 5 times, then dried and ground at 100 to 110 ℃, 60 to 160 Go through a sieve to obtain dry sludge powder;
[0022] (2) Fe 3 O 4 Preparation: add 0.5 g FeCl 3 • 6H 2 O was dissolved in 10 mL of ethylene glycol, and then 3 g of NaAc and 5 mL of ethylenediamine were added. The mixture was stirred vigorously for 20 minutes and then placed in the reactor. The mixture was heated to 200 ˚C and kept for 7 h. After cooling to room temperature, the black The solid is washed repeatedly with ultrapure water until it is neutral, and Fe is obtained after drying 3 O 4 powder;
[0023] (3) Preparation of graphene oxide: Mix 0.3 g of graphite and 1.5 g of potassium permanganate, add 30 mL of concentrated...
Example Embodiment
[0026] Example 2 Preparation method of a magnetic aerobic granular sludge-graphene oxide-multi-wall carbon nanotube composite adsorbent
[0027] (1) Preparation of aerobic granular sludge powder: the aerobic granular sludge cultured in the laboratory SBR reactor is washed with ultrapure water for 3 to 5 times, then dried and ground at 100 to 110 ℃, 60 to 160 Go through a sieve to obtain dry sludge powder;
[0028] (2) Fe 3 O 4 Preparation: 1 g FeCl 3 • 6H 2 O was dissolved in 20 mL of ethylene glycol, and 4 g of NaAc and 10 mL of ethylenediamine were added. The mixture was stirred vigorously for 30 minutes and then placed in the reaction kettle. The mixture was heated to 200 ˚C and kept for 8 hours. After cooling to room temperature, the black The solid is washed repeatedly with ultrapure water until it is neutral, and Fe is obtained after drying 3 O 4 powder;
[0029] (3) Preparation of graphene oxide: Mix 0.4 g of graphite and 1.8 g of potassium permanganate, add 35 mL of concentr...
Example Embodiment
[0032] Example 3 A preparation method of a magnetic aerobic granular sludge-graphene oxide-multi-wall carbon nanotube composite adsorbent
[0033] (1) Preparation of aerobic granular sludge powder: The aerobic granular sludge cultured in the laboratory SBR reactor is washed with ultrapure water for 3 to 5 times, then dried and ground at 100 to 110 ℃, 60 to 160 Go through a sieve to obtain dry sludge powder;
[0034] (2)Fe 3 O 4 Preparation: add 1.5 g FeCl 3 • 6H 2 O was dissolved in 30 mL of ethylene glycol, and then 5 g of NaAc and 15 mL of ethylenediamine were added. The mixture was stirred vigorously for 40 min and then placed in the reaction kettle, heated to 200 ˚C and kept for 9 h, cooled to room temperature, and the black solid Repeatedly wash with ultrapure water until it is neutral, and Fe will be obtained after drying 3 O 4 powder;
[0035] (3) Preparation of graphene oxide: mix 0.5 g of graphite and 2.0 g of potassium permanganate, add 40 mL of concentrated sulfuric acid ...
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