Preparation method of a hydroxyl-containing fly ash-based adsorption material and its application to nickel pollution control
An adsorption material and fly ash technology, which is applied in the direction of adsorption of water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve problems such as unsatisfactory nickel treatment effect and fly ash environmental pollution, and achieve the solution of heavy metal nickel Pollution, reduction of nickel pollution, effects of a wide range of sources
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Embodiment 1
[0022] A preparation method of a hydroxyl-containing fly ash-based adsorption material, comprising the following steps:
[0023] (1) After mixing 1 mol of acrylic acid, 0.5 mol of diethanolamine and 0.5 mol of ethylene glycol, add 2 mol of sulfuric acid (concentrated sulfuric acid), and heat to reflux for 3 to 6 hours;
[0024] (2) After neutralizing the obtained solution with NaOH solution, add 1 mol of acrylamide to the above obtained solution, mix well, blow nitrogen at 25°C, and then add 0.007 mol of sodium bisulfite and 0.006 mol of ammonium persulfate 20 React at ~40℃ for 5~10 hours;
[0025] (3) Add 70 g of fly ash to the above solution, stir continuously, and continue to react at 30-80°C for 1-8 h;
[0026] (4) Wash and dry the resulting mixture to obtain hydroxyl-containing fly ash-based Ni 2+ The adsorption material is denoted as FMHNi-1.
[0027] Add 50 mg of hydroxyl-containing fly ash-based adsorbent material to 50 mg / L Ni 2+ 10 L of water, after 3 h, the Ni i...
Embodiment 2
[0029] Double the amount of acrylic acid used in step (1) of Example 1, and the other steps are the same as in Example 1, and the resulting adsorbent material is denoted as FMHNi-2.
[0030] Removal of Ni in water 2+ The experiment was the same as in Example 1, and the results are shown in Table 1.
Embodiment 3
[0032] The amount of diethanolamine and the amount of ethylene glycol used in step (1) of Example 1 were doubled, and other steps were the same as in Example 1, and the obtained adsorbent material was designated as FMHNi-3.
[0033] Removal of Ni in water 2+ The experiment was the same as in Example 1, and the results are shown in Table 1.
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