▎ 摘　　要

NOVELTY - Treating anion dye waste water comprises ultrasonic treatment of graphene oxide and deionized water to prepare graphene oxide solution, stirring with chitosan aqueous solution containing acetic acid to obtain graphene oxide/chitosan mixed solution, freeze-drying, vacuum drying, impregnating in a crosslinking agent solution, filtering, treating in a liquid phase reducing agent, drying to obtain adsorbent, adding a flocculant into the waste water, stirring, allowing to stand, precipitating, separating solid from liquid, adding the adsorbent into the liquid, absorbing and solid-liquid separation. USE - The method is useful for treating anion dye waste water (claimed). ADVANTAGE - The method can remove harmful substances in the waste water; reduces the amount of flocculating agent and adsorbent; ensures high repeatedly; does not cause secondary pollution of water; and is economical and environmentally friendly. DETAILED DESCRIPTION - Treating anion dye waste water comprises (a) preparing an adsorbent by (a1) ultrasonic treatment of graphene oxide and deionized water to prepare graphene oxide solution and stirring with chitosan aqueous solution containing acetic acid, stirring to prepare graphene oxide/chitosan mixed solution (a2) adding the graphene oxide/chitosan mixed solution into a solution in a receiving bath in a dropwise manner, low-temperature freezing to obtain crystal composite ball by injector, freeze-drying, vacuum drying at 111 degrees C to obtain graphene oxide/chitosan composite ball (a3) impregnating the graphene oxide/chitosan composite ball in a crosslinking agent solution, stirring in a water bath at 55-75 degrees C for 2-5 hours, filtering, drying the obtained solid, treating in a liquid phase reducing agent, drying to obtain porous graphene oxide/chitosan composite microsphere to obtain adsorbent and (b) adding a flocculating agent into the waste water, stirring for 1-2 hours, allowing to stand, precipitating for 31-51 minutes, separating solid from liquid, adding the adsorbent into the liquid, stirring and absorbing for 1-4 hours, solid-liquid separation and separating the waste water after reaching the discharge standard.