علي انصاري

Due to Graphene Oxide unique properties such as high surface area, chemical stability and high mechanical resistance, Graphene Oxide has shown good properties in water and wastewater treatment. Despite the many advantages of Graphene Oxide, this material is easily washed and it is difficult to separate it in the water recycling process, so it is necessary to use a supporting material to keep graphene oxide stable. In this thesis, the effectiveness of graphene oxide coated on Quartz to remove organic pollutants through the adsorption process has been eva‎luated with the help of Batch Tests. For this purpose, Quartz sand was first washed with acid to activate functional groups on its surface, and then Graphene Oxide was coated on Quartz particles by physical and chemical methods. Optimizing and checking the effect of operating variables was done using the method of checking each factor at a time (OFAT). For this purpose, pH variables, adsorbent amount, adsorbate dose, contact time and temperature were optimized. The results showed that the removal efficiency of organic pollutants in acidic conditions is significantly higher than in alkaline conditions. Reducing the pH from 4 to 2 greatly increases the removal efficiency and the removal percentage increased from 22% to 90%. The removal efficiency of 90% for 50 mg/L humic acid in the optimal amounts of 50 g of Quartz coated with graphene oxide occurred at a contact time of 3 hours. The presented approach provides a new insight for the treatment of organic pollutants from surface water.

آب هاي سطحي , گرافن اكسايد , سيليس , جذب

surface water , graphene oxide , quartz sand , adsorption

Ali Ansari

Majid Hosseinzadeh