Studies on Synthesis of Graphene Oxide for Purification of Crystal Violet Dye Wastewater
In order to find a kind of cheap and readily available material with good adsorption capacity and high efficiency for organic pollution treatment in water,the modified Hummers method was used in this experiment to prepare graphene oxide for dyeing wastewater treatment.A series of single-factor experiments were designed to systematically investigate the adsorption of graphene oxide on gentian violet under different conditions and to fit the adsorption kinetics and isothermal models.The results showed that the optimal adsorption conditions were p H=9,adsorbent dose 0.03 g,adsorption time 30 min,rotation speed 1 200 r/min,and an adsorption solution concentration 50 mg/L.Under optimal conditions,a maximum adsorption rate of 98.36%and an adsorption capacity up to 81.96 mg/g were achieved.The isotherm model is in line with Langmuir adsorption,and the kinetic model is in accordance with quasi second-order adsorption,which reflect the monolayer chemisorption mechanism.Graphene oxide showed strong selective adsorption ability for gentian violet and has high potential for decontamination of dye pollution in aquatic environment.
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