Applied Analysis of Graphene Nanoparticle in Rotating Disk Reactor to Investigate the Reduction of Pollutants in Industrial Wastewater

In this research, it was tried to use a reactor containing plates covered with Graphene nanoparticles and placing it after the anaerobic biological treatment unit of dyeing treatment plant will reduce the pollution load for the next stages of treatment by absorbing aromatic substances resulting from the anaerobic biological destruction stage. The results of the field emission electron microscope (FE-SEM) analysis showed that the Graphene layers on the reactor plates were multi-layered. Then the effect of three parameters of effluent concentration (COD: 70, 100, 150 mg/L), pH (5, 7, 9) and temperature (20, 30 and 40 ˚C) on the amount of removal of aromatic compounds, COD and effluent turbidity were investigated. The results showed that high concentration of COD had faster and better absorption by Graphene than its low concentration. Among the three tested temperatures, a higher absorption rate was observed at the higher temperature. Also, with the increase of pH from 5 to 9, the amount of absorption increased. This system showed relatively good performance in absorbing aromatic substances and reducing COD. Optimum conditions of reactor performance were determined as COD: 150 mg/L, pH = 9 and temperature 40 ˚C.