Adsorption study of 4-nitro-xylene from aqueous solutions onto graphene oxide

4 Nitro xylene is one of the dangerous and toxic compounds that enters water sources from the effluents of industries producing various insecticides and causes pollution of water reserves and the environment. In this paper, graphene oxide was used to remove the toxic compound of 4-nitroxylene from aqueous solutions by adsorption method. In this regard, the effect of various parameters such as initial concentration of 4 nitro xylene, contact time, initial pH, adsorbent dose and temperature on the removal of 4 nitrogen xylene was studied. The results showed that the adsorption process reaches equilibrium in 90 minutes. The removal rate of 4 nitro xylene increases with increasing adsorbent dose and temperature. the highest removal rate also occurred at pH = 7. however, increasing the concentration of 4 nitro xylene has an inverse relationship with the removal percentage, and increasing the concentration of 4 nitro xylene reduces the removal percentage. according to the results, 0.001 g of graphene oxide is able to remove 95.69% of 4 nitro xylene at an initial concentration of 10000 mg L-1 and at pH = 6.6 Therefore, graphene oxide is a powerful adsorbent to remove the toxic compound of 4 nitro xylene.