Anti-pollution hollow fiber membrane with heavy metal ion and organic dye removing function
A technology of heavy metal ions and organic dyes, applied in water pollutants, fiber treatment, alkali metal compounds, etc., to achieve the effect of high packing density, good pressure resistance, and good adsorption of heavy metal ions.
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Embodiment 1
[0033] (1) Preparation of GO: In an ice-water bath, slowly add 200mL of concentrated sulfuric acid to a 1L three-neck flask, then add 10g of graphite and 3g of sodium nitrate in sequence, the addition process must be slow, and the graphite and sodium nitrate have been repeatedly ground before adding , After stirring for 1 h, then slowly add 25 g of potassium permanganate, and mechanically stir it in an ice-water bath for 1.5 h. Then raise the temperature to 30°C, react for 2 hours, then slowly add 200mL of 30°C deionized water, then raise the temperature of the reaction system to 80°C and stir for 10min, then slowly add 400mL of deionized water into the system, stir for 2min, then add 20mL of peroxide Hydrogen terminated the reaction, and the reactants were stirred for 10 minutes, then centrifuged, and washed repeatedly with dilute hydrochloric acid and deionized water until the pH of the product was 7, and the desired GO of the present invention was obtained.
[0034] (2) Pre...
Embodiment 2
[0041] (1) Preparation of GO: In an ice-water bath, slowly add 250mL of concentrated sulfuric acid to a 1L three-necked flask, and then add 15g of graphite and 5g of sodium nitrate in sequence. The addition process must be slow, and graphite and sodium nitrate have been repeatedly ground before adding , After stirring for 1.5h, then slowly add 35g of potassium permanganate, and mechanically stir it in an ice-water bath for 2h. Then raise the temperature to 40°C, react for 2.5 hours, then slowly add 250mL of 40°C deionized water, then raise the temperature of the reaction system to 90°C and stir for 20min, then slowly add 500mL of deionized water into the system, stir for 2min, then add 25mL of deionized water Hydrogen oxidation terminated the reaction, and the reactant continued to stir for 20 minutes, then centrifuged, and washed repeatedly with dilute hydrochloric acid and deionized water until the pH of the product was 7, and the desired GO of the present invention was obtai...
Embodiment 3
[0049] (1) Preparation of GO: In an ice-water bath, slowly add 200mL of concentrated sulfuric acid to a 1L three-neck flask, then add 15g of graphite and 5g of sodium nitrate in sequence. The addition process must be slow, and graphite and sodium nitrate have been repeatedly ground before adding , After stirring for 1.5h, then slowly add 25g of potassium permanganate, and mechanically stir it in an ice-water bath for 2h. Then raise the temperature to 30°C, react for 2 hours, then slowly add 250mL of 30°C deionized water, then raise the temperature of the reaction system to 80°C and stir for 10min, then slowly add 500mL of deionized water into the system, stir for 2min, then add 25mL of peroxide Hydrogen terminated the reaction, and the reactants were stirred for 20 minutes, then centrifuged, and washed repeatedly with dilute hydrochloric acid and deionized water until the pH of the product was 7, and the desired GO of the present invention was obtained.
[0050] (2) Pretreatme...
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