CPC C02F 1/442 (2013.01) [B01D 67/0083 (2013.01); B01D 67/0088 (2013.01); B01D 69/12 (2013.01); B01D 71/0212 (2022.08); B01D 71/022 (2013.01); B01J 20/205 (2013.01); B01J 20/262 (2013.01); B01J 20/28035 (2013.01); B01J 20/3204 (2013.01); B01J 20/3223 (2013.01); B01J 20/3272 (2013.01); B01J 20/3297 (2013.01); C02F 2101/308 (2013.01)] | 13 Claims |
1. A method for purifying dye-containing wastewater based on a porous-polymer-modified metal carbon nanotube membrane, comprising:
(1) preparing the porous-polymer-modified metal carbon nanotube membrane, which comprises:
immersing a carbon nanotube membrane in aqua regia for acidification to obtain an acidified carbon nanotube membrane;
preparing a modification solution that includes a zirconium salt, terephthalic acid, acetic acid, and a solvent;
heating the acidified carbon nanotube membrane in the modification solution and reacting to obtain a metal carbon nanotube membrane;
conducting a polymerization reaction of 2,3,5,6-tetrafluoroterephthalonitrile and 5,5′,6,6′-tetrahydroxy-3,3′,4,4′-tetramethyl-1,1′-spiralbisindan, under nitrogen atmosphere and in the presence of anhydrous potassium carbonate, to obtain a crude polymer product;
precipitating the crude polymer product in methanol, dissolving the crude product in chloroform, precipitating the crude polymer product in methanol, and heating the crude polymer product in water to obtain a porous polymer;
preparing a polyethylene glycol diglycidyl ether (PEGDEG) solution and coating the metal carbon nanotube membrane with the polyethylene glycol diglycidyl ether solution;
preparing a porous polymer solution and coating the metal carbon nanotube membrane with the porous polymer solution; and
heating the metal carbon nanotube membrane to obtain the porous-polymer-modified metal carbon nanotube membrane; and
(2) passing the dye-containing wastewater through the porous-polymer-modified metal carbon nanotube membrane to remove dyes in the dye-containing wastewater.
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