Method for removing mercury ions in water by using magnetically-modified carbon nano tube and method for regenerating magnetically-modified carbon nano tube
A carbon nanotube, mercury ion technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc. problems, to achieve good economic and environmental benefits, reduce the risk of secondary pollution, and facilitate subsequent treatment.
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Embodiment 1
[0037] Example 1 Preparation of magnetically modified carbon nanotube materials
[0038] A. Oxidative activation:
[0039] 1. Take carbon nanotube material 1.0g, place in 60 ml autoclave, add 20 ml concentration mass fraction and be the concentrated nitric acid of 65-68%, airtight autoclave; The autoclave used in the present invention is a high pressure airtight The container is resistant to high pressure. It is composed of a polytetrafluoroethylene lined tank and a stainless steel sealing jacket. The stainless steel sealing jacket is compacted up and down by threads, so that the lid and the tank body of the lined tank can achieve a sealing effect, and the internal reaction can be made by heating The reaction is carried out under the conditions of high temperature and high pressure in a closed environment;
[0040] ②Put the high-pressure reactor containing the above reactants in an oven, keep it at 100°C for 10 minutes, then rapidly raise the temperature to 150°C, and react f...
Embodiment 2
[0049] Example 2 Preparation of magnetically modified carbon nanotube materials
[0050] A, oxidation activation is the same as embodiment 1:
[0051] B. Magnetic modification:
[0052] ①The magnetic modification reaction is carried out under the condition of ultrasonic wave and nitrogen protection, and the reaction temperature is 50 ℃;
[0053] ② Weigh 1.0 g of the activated carbon nanotube material and suspend it in 200 ml of a mixed solution containing 1.24 g (NH4)2Fe(SO4)2·6H2O and 1.83NH4Fe(SO4)2·12H2O. (iron+carbon nanotube) mass fraction is 28%, and product is recorded as 28% / Fe magnetically modified carbon nanotube;
[0054] ③ Put the above system solution under the conditions of ultrasonic frequency 40 KHz, ultrasonic power 250 W, and heating power 400 W for 10 min; add 8 mol / L ammonia water dropwise during the reaction to keep the pH value of the mixture at 11- Between 12;
[0055] ④ After the ultrasonic reaction, the reaction system was kept in a constant temper...
Embodiment 3
[0057] Example 3 Preparation of magnetically modified carbon nanotube materials
[0058] A, oxidation activation is the same as embodiment 1:
[0059] B. Magnetic modification:
[0060] ①The magnetic modification reaction is carried out under the condition of ultrasonic wave and nitrogen protection, and the reaction temperature is 50 ℃;
[0061] ② Weigh 1.0g of the activated carbon nanotube material and suspend it in 200 ml of a mixed solution containing 2.62g (NH4)2Fe(SO4)2·6H2O and 3.85gNH4Fe(SO4)2·12H2O. (iron+carbon nanotube) mass fraction is 45%, and product is recorded as 45% / Fe magnetically modified carbon nanotube;
[0062] ③ Put the above system solution under the conditions of ultrasonic frequency 40 KHz, ultrasonic power 250 W, and heating power 400 W for 10 min; add 8 mol / L ammonia water dropwise during the reaction to keep the pH value of the mixture at 11- Between 12;
[0063] ④ After the ultrasonic reaction, the reaction system was kept in a constant tempera...
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