Floating absorbent and preparation method and application thereof

[0031] Example 1:

[0032] S1. Weigh 10g of hollow glass beads and place them in a 500mL beaker, then add 300mL of NaOH solution with a concentration of 0.5mol/L, and stir for 1.5h at a speed of 100 revolutions/min in a constant temperature water bath at 80°C. After the suspension is cooled, it is repeatedly washed and filtered with ultrapure water until the filtrate is neutral. The obtained white solid is dried in a constant temperature drying oven at a temperature of 60° C. for 24 hours to obtain a white powder.

[0033] S2. Weigh 10g of the white powder obtained in S1, place it in a 500mL beaker, add 150mL of ultrapure water, 150mL of absolute ethanol and 10mL of silane coupling agent KH550, in a constant temperature water bath at 80℃ at 100 rpm Stir at a speed of 2h. After the white suspension is cooled, it is washed and filtered with ultrapure water. The obtained white solid is dried in a constant temperature drying oven at 60°C for 24h, and the obtained product is a white powder.

[0034] The prepared sorbent is subjected to adsorption test in a constant temperature water bath shaking box, the initial pH is 2, the dosage of sorbent is 1mg/ml, the ambient temperature is 45℃, the initial concentration of dye is 100 mg/L, and the adsorption time is 5h , The removal rate of Orange 2 is 92.35%.

[0035] Example 2:

[0036] S11. Weigh 10g hollow glass microbeads and place them in a 500mL beaker, then add 300mL NaOH solution with a concentration of 0.5mol/L, and stir for 1.5h at a speed of 100 revolutions/min in a constant temperature water bath at 80°C. After the suspension is cooled, it is repeatedly washed and filtered with ultrapure water until the filtrate is neutral. The obtained white solid is dried in a constant temperature drying oven at a temperature of 60° C. for 24 hours to obtain a white powder.

[0037] S12. Weigh 10g of the white powder obtained in S1, place it in a 500mL beaker, add 150mL ultrapure water, 150mL absolute ethanol and 10mL silane coupling agent KH550, in a constant temperature water bath at 80℃ at 100 rpm Stir at a speed of 2h, after the white suspension is cooled, wash it with ultrapure water and filter it, the obtained white solid is dried in a constant temperature drying oven at 60°C for 24h, and the obtained product is a white powder.

[0038] S13. Weigh 10g of S2 and place the product in a 500mL round-bottom flask, add 200mL ultrapure water, and pass N 2 Rinse for 5 minutes, and place it in a constant temperature water bath at 50°C under airtight anaerobic conditions and stir at 100 rpm. Weigh 0.5g of potassium persulfate and 10g of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), put them in a 100mL beaker, add 10mL of ultrapure water and stir until it is completely dissolved, then pass in N 2 After rinsing for 5 minutes, add the 0.05g/mL potassium persulfate aqueous solution into the stirring round bottom flask, continue to stir for 10 minutes to make the surface amino (-NH 2 ) After activation, add the AMPS aqueous solution with a concentration of 1g/mL to the round bottom flask, continue to stir for 3h, make AMPS graft on AHGM (hollow glass beads grafted with silane coupling agent KH550), wait for the white suspension to cool, It was washed and filtered with ultrapure water, and the white solid obtained was dried in a constant temperature drying oven at 60° C. for 24 hours, and the white powder obtained was the absorbent.

[0039] The prepared sorbent was subjected to adsorption test in a constant temperature water bath shaking box, the initial pH was 9, the dosage of sorbent was 1mg/ml, the ambient temperature was 50℃, the initial concentration of dye was 1000 mg/L, and the adsorption time was 5h , The adsorption capacity for methylene blue is 436.82mg/g, the adsorption capacity for malachite green is 637.36mg/g, the adsorption capacity for basic fuchsin is 457.85mg/g, and the adsorption capacity for crystal violet is 399.40mg/g .

[0040] Example 3:

[0041] S11. Weigh 10g hollow glass beads and place them in a 500mL beaker, then add 300mL NaOH solution with a concentration of 0.5mol/L, and stir for 2h at a speed of 100 revolutions/min in a constant temperature water bath at 80°C, and wait for the white to suspend After the liquid is cooled, it is repeatedly washed and filtered with ultrapure water until the filtrate is neutral, and the obtained white solid is dried in a constant temperature drying oven at 60° C. for 24 hours to obtain a white powder.

[0042] S12. Weigh 10g of the white powder obtained in S1, place it in a 500mL beaker, add 150mL of ultrapure water, 150mL of absolute ethanol and 10mL of silane coupling agent KH550, in a constant temperature water bath at 80°C at 100 revolutions per minute Stir at a speed of 2h. After the white suspension is cooled, it is washed and filtered with ultrapure water. The obtained white solid is dried in a constant temperature drying oven at 60°C for 24h, and the obtained product is a white powder.

[0043] S13. Weigh 10g of S2 and place the product in a 500mL round-bottom flask, add 200mL ultrapure water, and pass N 2 Rinse for 5 minutes, and place it in a constant temperature water bath at 50°C under airtight anaerobic conditions and stir at 100 rpm. Weigh 0.5g of potassium persulfate and 10g of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), put them in a 100mL beaker, add 10mL of ultrapure water and stir until it is completely dissolved, then pass in N 2 After rinsing for 5 minutes, add the 0.05g/mL potassium persulfate aqueous solution into the stirring round bottom flask, continue to stir for 10 minutes to make the surface amino (-NH 2 ) After activation, the AMPS aqueous solution with a concentration of 1g/mL was added to the round-bottomed flask, and the stirring was continued for 3h to graft AMPS onto the AHGM. After the white suspension was cooled, it was washed and filtered with ultrapure water. The resulting white solid was After being dried in a constant temperature drying oven at 60°C for 24 hours, the white powder obtained is the absorbent.

[0044] The adsorption test is carried out in a constant temperature water bath shaking box, the initial pH is 9, the dosage of sorbent is 1mg/mL, the ambient temperature is 50℃, the initial concentration of dye is 1000mg/L, the adsorption time is 5h, the adsorption capacity for methylene blue It is 502.33mg/g.