Magnetic cationized biological flocculant and preparation method thereof
A biological flocculant and cationization technology, applied in the field of water treatment, can solve the problems of limited application scope, large dosage of magnetic powder and high economic cost, and achieve the effect of simplifying the flocculation process, reducing the content and reducing the secondary pollution.
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[0025] The preparation method of the magnetic cationized biological flocculant of the present invention is:
[0026] Mix glycidyl trimethyl ammonium chloride and NaOH solution evenly, react for 10 minutes, then add a biological flocculant (glycoprotein microbial flocculant), and stir rapidly at room temperature for 1.5 to 2 hours at a speed of about 80 r / min, so that well mixed. Then, after reacting at 80-90° C. for 2-4 hours, water is added to the reaction mixture until it is completely dissolved, and then anhydrous ethanol is added for extraction, and the volume ratio of anhydrous ethanol extraction is 1:3-5. The precipitate is separated out, centrifuged, the supernatant is discarded, and the precipitate is dried to obtain a cationized glycoprotein microbial flocculant.
[0027] Wherein, the molar ratio of glycidyl trimethyl ammonium chloride and NaOH is 1:(1-1.6), and the concentration of NaOH solution is 1 mol / L. The corresponding glycidyl trimethyl ammonium chloride per...
Embodiment 1
[0032] Step 1, cationic modification of glycoprotein microbial flocculants:
[0033] Mix 0.015mol glycidyl trimethyl ammonium chloride and NaOH solution with a concentration of 1 mol / L according to the glycidyl trimethyl ammonium chloride and NaOH molar ratio of 1:1.2, and stir for 10 minutes to fully mix, After the reaction, 10 g of pure glycoprotein microbial flocculant was added. The mixture was stirred at room temperature at 80 r / mim for 2 hours and fully mixed, and then placed in a thermostat to react at 80° C. for 3 hours to obtain a mixture of cationized glycoprotein microbial flocculants.
[0034] Step 2, purification of cationized glycoprotein microbial flocculants:
[0035] The mixture obtained in the above steps was completely dissolved in 10 mL of deionized water, then 30 mL of anhydrous ethanol was added to precipitate the precipitate, filtered, the precipitate was repeatedly washed three times, the supernatant was discarded, and the precipitate was retained. Af...
Embodiment 2
[0058] Step 1, cationic modification of glycoprotein microbial flocculants:
[0059] Mix 0.01 mol of glycidyl trimethyl ammonium chloride and a NaOH solution with a concentration of 1 mol / L according to the 1:1 molar ratio of glycidyl trimethyl ammonium chloride and NaOH, and stir for 10 minutes to fully mix, After the reaction, 10 g of glycoprotein microbial flocculant was added. The mixture was stirred at room temperature at 80 r / mim for 2 hours and fully mixed, and then placed in a thermostat to react at 90° C. for 2 hours to obtain a mixture of cationized glycoprotein microbial flocculants.
[0060] Step 2, purification of cationized glycoprotein microbial flocculants:
[0061] The mixture obtained in the above steps was completely dissolved in 10 mL of deionized water, then 30 mL of anhydrous ethanol was added to precipitate the precipitate, filtered, the precipitate was repeatedly washed three times, the supernatant was discarded, and the precipitate was retained. Afte...
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