Abstract
Graphene oxide was prepared using Hummer method and reduced by microwave hydrothermal reactor. The characteristics of RGO nanosheets were determined with EDAX, X-ray diffraction, FTIR, scanning electron microscopy, and AFM. RGO nanosheets have been utilized as the adsorbent for the removal of Basic Blue 41 (BB41) dye from an aqueous solution at room temperature (298°K) as an appropriate innovative and low-cost adsorbent. The effect of pH, adsorbent dose, contact time, and initial dye concentration on adsorption was studied. The results indicated that RGO can be employed as a low-cost alternative compared to other commercial adsorbents in the removal of dyes from wastewater. The maximum adsorption capacity was at pH 9 and 0.05g of RGO adsorbent dose. It was shown the rapid adsorption of BB41 in the first 180 min contact time. The BB41 removal percentage decreased as the initial dye concentration increased. The experimental data were analyzed by Langmuir and Freundlich adsorption isotherms. According to the determined coefficients, the Langmuir model was fitted better than the Freundlich model. The results indicated that RGO could be employed as an excellent sorbent for removal of BB41 dye from an aqueous solution.
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