Graphene oxide nanosheet: preparation and dye removal from binary system colored wastewater

In this paper, graphene oxide (GO) was prepared from graphite and used as an adsorbent to remove cationic dyes from single and binary systems of colored wastewater. The GO was prepared by Hummer method and characterized using Fourier transform infrared, scanning electron microscopy, and X-ray diffraction. Basic blue 41 (BB41), basic red 18 (BR18), and basic red 46 (BR46) were used as model dyes. It was found that the adsorption of dyes on GO followed the Langmuir isotherm and the pseudo-second-order kinetics. The capacity of GO to remove BB41, BR18, and BR46 was 1429, 1250, and 476 mg/g, respectively. The results show that the GO has a good capacity for dye adsorption from single and binary systems of colored wastewater containing cationic dyes.