摘要：The removal of Acid Orange 7 (AO7) from an aqueous solution using activated carbon and graphene as two organic adsorbents has been studied. Batch experiments for dye removal had been carried out, and the effects of some operational parameters, such as initial dye concentration, pH, contact time and different doses of activated carbon and graphene, were investigated. Results showed that, at 75 mg/L as initial dye concentration, after 420 min, the removal efficiency values by activated carbon were equal to 94% for AO7. In contrast, graphene was capable of removing AO7 at all initial concentrations, with a removal efficiency in the range of 98-100% after 180 min. The removal process was fast and more efficient at pHs equal to 3 by both carbon and graphene. According to the results of this research work, the absorption process of dyes by graphene reaches a balance very quickly when compared with activated carbon. Therefore, graphene acts as suitable adsorbent, and can be applied in treating industrial effluents and contaminated water in greater scales.
关键词：Acid orange 7; active carbon; graphene; adsorbent
